United States
            Environmental Protection
            Agency
            Office of Research and
            Development
            Washington DC 20460
EPA/625/R-92/007
September 1993
EPA
Use of Airborne,
Surface, and Borehole
Geophysical Techniques at
Contaminated Sites
            A Reference Guide

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Technology Transfer                                           EPA/625/R-92/007
             USE OF AIRBORNE, SURFACE, AND BOREHOLE

        GEOPHYSICAL TECHNIQUES AT CONTAMINATED SITES:

                          A REFERENCE GUIDE


                                September 1993



                                 Prepared by:
                            Eastern Research Group
                              110 Hartwell Avenue
                              Lexington, MA 02173
                                    For:
                Office of Science Planning and Regulatory Evaluation
                   Center for Environmental Research Information
                      U.S. Environmental Protection Agency
                        26 West Martin Luther King Drive
                             Cincinnati, OH 45268
                                                           Printed on Recycled Paper

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                                 Notice
This document has been reviewed in accordance with the U.S. Environmental Protection Agency's peer and
administrative review policies and approved for publication. Mention of trade names or commercial products
does not consitute endorsement or recommendation for use.

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                               TABLE OF  CONTENTS
                                                                                   PAGE
List of Tables	iv
List  of Figures	vi
Acknowledgments	vii
Glossary of Abbreviations	viii
Preface	ix


CHAPTER 1  OVERVIEW	1-1

       1.1     General Terminology	1-1
       1.2     Uses of Geophysical Methods	1-3
       1.3     General Characteristics of Geophysical Methods	1-4
              1.3.1 Airborne, Surface, and Downhole Methods	1-4
              1.3.2 Natural versus Artificial Field Sources	1-9
              1.3.3 Measurement of Geophysical Properties	1-9
       1.4     Introduction to the Geophysical Literature	1-14
              1.4.1 General Geophysics	1-14
              1.4.2 Ground Water and Contaminated Sites	1-14
              1.4.3 Evaluation of Literature References	1-23
              1.4.4 Use of Reference Index Tables in This Guide	1-24
              1.4.5 Obtaining References	1-25
       1.5     Where to Obtain Technical  Assistance	1-28
       1.6     References	1-29


CHAPTER 2  AIRBORNE REMOTE SENSING AND GEOPHYSICS	2-1

       2.1     Visible and Near-Infrared Aerial Photography	2-4
       2.2     Other Airborne Remote Sensing and Geophysical Methods	2-5
       2.3     References	2-9
CHAPTER 3  SURFACE GEOPHYSICS: ELECTRICAL METHODS
...3-1
       3.1     Electrical versus Electromagnetic Methods	3-1
              3.1.1 Types of Electrical Methods	3-2
              3.1.2 Subsurface Properties Measured	3-2
       3.2     Direct Current Electrical Resistivity	3-3
       3.3     Specialized Applications of DC Resistivity	3-9
       3.4     Self-Potential	3-12
       3.5     Induced Polarization and Complex Resistivity	3-13
       3.6     References	3-22

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                             TABLE OF CONTENTS (cont.)

                                                                             PAGE



CHAPTER 4  SURFACE GEOPHYSICS: ELECTROMAGNETIC  METHODS	4-1

      4.1    Frequency Domain Electromagnetic Induction	4-2
      4.2    Time Domain Electromagnetics	4-4
      4.3    Metal Detection	4-6
      4.4    Very Low Frequency Resistivity	4-6
      4.5    Magnetotelluric Methods	4-7
      4.6    References	4-14


CHAPTER 5 SURFACE GEOPHYSICS: SEISMIC AND ACOUSTIC METHODS	5-1

      5.1    Seismic Refraction	5-2
      5.2    Shallow Seismic Reflection	5-4
      5.3    Other Seismic Methods	5-7
             5.3.1 Continuous Seismic Profiling	5-7
             5.3.2 Seismic Shear Methods	5-8
             5.3.3 Spectral Analysis of Surface Waves	5-9
      5.4 Acoustic Methods	5-9
             5.4.1 Sonar Methods	5-9
             5.4.2 Acoustic Emission Monitoring	5-10
      5.5 Borehole Acoustic and Seismic Methods	5-11
      5.6 References	5-18


CHAPTER 6 SURFACE GEOPHYSICS: OTHER METHODS	6-1

      6.1    Ground Penetrating Radar and Related Methods	6-1
             6.1.1 Terminology	6-1
             6.1.2 Ground Penetrating Radar	6-2
      6.2    Magnetometry	6-5
      6.3    Gravimetrics	6-6
      6.4    Thermal Methods	6-7
             6.4.1 Shallow Geothermal Measurements	6-7
             6.4.2 Borehole Temperature Logging	6-8
      6.5 References	6-15


CHAPTER 7 BOREHOLE GEOPHYSICS	7-1

      7.1    Overview of Downhole Methods	7-1
             7.1.1 Requirements of Borehole Methods	7-1

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                             TABLE OF CONTENTS (cont.)

                                                                             PAGE
             7.1.2 Applications of Borehole Methods	7-5
             7.1.3 Geophysical Well Log Suites	7-8
             7.1.4 Guide to Major References	7-8
      7.2    Special Considerations	7-13
             7.2.1 Borehole versus In Situ Methods	7-13
             7.2.2 Surface-Borehole/Source-Receiver Configurations	7-13
             7.2.3 Tomographic Imaging	7-16
      7.3    Major Types of Logging Methods	7-16
             7.3.1 Electrical and Electromagnetic Logging Methods	7-17
             7.3.2 Nuclear Logging Methods	7-20
             7.3.3 Acoustic and Seismic Logging Methods	7-20
      7.4    Miscellaneous Logging Methods	7-23
             7.4.1 Lithologic and Hydrogeologic Characterization Logs	7-23
             7.4.2 Well Construction Logs	7-25
      7.5    References	7-35
APPENDIX A      CASE STUDY SUMMARIES FOR SURFACE AND
                   BOREHOLE GEOPHYSICAL METHODS	A-l

APPENDIX B      TECHNICAL INFORMATION SOURCES	B-l
                                          in

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                                    LIST OF TABLES

 1-1     Summary Information on Remote Sensing and Surface Geophysical Methods
 1-2    Major Surface Geophysical Methods for Study of Subsurface Contamination
 1-3     Classification of Surface Geophysical Methods
 1-4    General Text on Geophysics
 1-5    Bibliographies, Reports, and Symposia Focusing on Application of Surface Geophysical
       Methods to Ground Water and Contaminated Sites
 1-6    Conferences and Symposia Proceedings with Papers Relevant to Subsurface
       Characterization and Monitoring
 1-7     Index to Texts and Papers on General Applications of Geophysics to the Study of
       Ground Water and Contaminated Sites

2-1     Use of Airborne Sensing Techniques in Hydrogeologic and Contaminated Site Studies
2-2    Index for References on Airborne Remote Sensing and Geophysical Methods

3-1     Index to General References on DC Electrical Resistivity Methods
3-2    Index to References on Applications of DC Resistivity Methods
3-3     Index to References on Specialized DC Electrical Resistivity and Self-Potential Methods
3-4     Index to References on Induced Polarization Electrical Methods

4-1     Index to General References on Electromagnetic Induction Methods
4-2     Index to References on Applications of Electromagnetic  Induction Methods
4-3     Index to References on TDEM, VLF Resistivity, Metal Detection, and Magnetotelluric
       Methods

5-1     Index to General References on Seismic Refraction
5-2     Index to References on Applications of Seismic Refraction
5-3     Index to References on Seismic Reflection Methods
5-4     Index to References on Miscellaneous Seismic and Acoustic Methods

6-1     Index to References on Ground Penetrating Radar
6-2     Index to References on Magnetic Methods
6-3     Index to References on Gravity Methods
6-4     Index to References on Shallow and Borehole Thermal Methods

7-1     Characteristics of Borehole Logging Methods
7-2     Summary of Borehole Log Applications
7-3     General Texts on Borehole Geophysical Logging and Interpretation
7-4     Borehole Geophysics Texts, Reports, and Symposia Focusing on Hydrogeologic and
       Contaminated Site Applications
7-5     Summary of Electrical and EM Borehole Logging Methods in Hydrogeologic Studies
7-6     Summary of Nuclear Borehole Logging Methods in Hydrogeologic Studies
7-7     Summary of Acoustic and Seismic Borehole Logging Methods in Hydrogeologic Studies
7-8     Summary of Miscellaneous Borehole Logging  Methods in Hydrogeologic Studies
7-9     Index for General References on Borehole Geophysics
7-10    Index for References on Electric and EM Borehole Logging Methods
7-11    Index for References on Nuclear Logging Methods

                                           iv

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7-12 Index for References on Acoustic and Seismic Logging Methods
7-13 Index for References on Miscellaneous  Logging Methods
7-14 Index for References on Applications of Borehole Geophysics in Hydrogeologic and
       Contaminated Site Investigations

A-l    Ground-Water Contamination Case Studies Using Surface Geophysical Methods
A-2    Ground-Water Contamination Case Studies Using Borehole Geophysical Methods

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                                    LIST OF FIGURES

1-la   The electromagnetic spectrum:  customary divisions and portions used for geophysical
       measurements.
1-lb   The electromagnetic spectrum:  factors and phenomena influencing the radiation of
       electromagnetic  waves.
l-2a   Ways of presenting areal geophysical measurements: an isopleth map of electrical
       conductivity  measurement.
l-2b   Ways of presenting area geophysical measurements: a 3-dimensional  view of the data.
1-3    Discrete sampling versus continuous geophysical measurements.

2-1    Portions of the electromagnetic spectrum used for remote sensing.

3-1    Diagram showing basic concept of resistivity measurement.
3-2    Wenner, Lee-Partitioning, and Schlumberger electrode arrays.
3-3    Dipole-dipole arrays.
3-4a   Resistivity soundings and profiles: isopleths of resistivity profiling data showing extent of
       a landfill plume.
3-4b   Resistivity profile across glacial clays and gravels.
3-5a   Specialized DC  resistivity electrode configurations:  layout of azimuthal resistivity array.
3-5b   Specialized DC  resistivity electrode configurations:  azimuthal resistivity variations of
       fractured and unfractured landfill cover.
3-5c   Specialized DC  resistivity electrode configurations:  tri-potential electrode array.
3-6a   Self-potential measurements:  apparatus  and graph of measurement over a fissured zone
       of limestone  illustrating negative streaming potential caused by ground-water seepage.
3-6b   Self-potential measurements:  electrical leak detection using modified self-potential
       method.

4-la    Electromagnetic   induction:   block diagram showing EMI principle of  operations.
4-lb    Electromagnetic   induction:   the depth of EMI soundings is dependent upon coil spacing
       and  orientation selected.
4-2a   Time domain electromagnetic:  block diagram showing TDEM principles of operation.
4-2b   Time domain electromagnetic:  the depth of TDEM soundings is dependent on
       transmitter current,  loop size,  and time of measurement.

5-1    Field layout of a 12-channel seismograph showing the path of direct and refracted seismic
       waves in a two-layer soil/rock  system.
5-2    Flow diagram showing steps in the  processing and interpretation of seismic refraction
       data.
5-3    Schematic traveltime curves for idealized nonhomogeneous geologic models

6-1    Block diagram of ground penetrating radar system.
6-2    Reflection configurations on ground penetrating radar images indicating the lithologic
       and  stratigraphic properties of sediments in the glaciated Northwest.

7-1    Typical response of a suite of  hypothetical geophysical well logs to a sequence of
       sedimentary rocks.
7-2    Typical response of a suite of  hypothetical geophysical well logs to various altered and
       fractured  crystalline  rocks


                                             vi

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                                     ACKNOWLEDGMENTS


        This document was prepared for the U.S. Environmental Protection Agency (EPA), Center for
Environmental Research Information, Cincinnati,  Ohio.  The document benefited from the input of the
reviewers listed below. Given the large number of references in this guide, errors or omission in citations may
have occurred. These are the  responsibility of the author,  who would appreciate having them, or any
important references that have been omitted, brought to his attention.

Author

J. Russell Boulding, Eastern Research Group, Inc. (ERG)

Project Management

Susan Schock, EPA CERI, Cincinnati, Ohio
Heidi Schultz,  ERG, Lexington, Massachusetts

Reviewers:

Hugh F. Bennett, Department of Geological Sciences, Michigan State University, East Lansing, Michigan
Regina Bochicchio, Desert Research Institute, Las Vegas, Nevada
Peter Haeni, U.S. Geological Survey, Water Resources Division, Hartford, Connecticut
Paul C. Heigold Illinois State Geological Survey, Champaign,  Illinois
Scott E. Hulse, Lockheed Corporation, Las Vegas, Nevada
J. Duncan McNeill, Geonics Limited, Mississaugua, Ontario, Canada
Gary Olhoeft, U.S. Geological Survey, Denver, Colorado
Benjamin H. Richard, Department of Geological Sciences, Wright State University, Dayton, Ohio
                                               vn

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                                    GLOSSARY OF ABBREVIATIONS

Method Abbreviations

AEM - airborne electromagnetic
AFMAG  - audiofrequency magnetic
AMI - audiomagnetotelluric
ATV - acoustic televiewer
BH - borehole
CSAMT - controlled source audiomagnetotelluric
CSP - continuous seismic profling
Eh - Oxidation reduction
EM - electromagnetic (used when not enough information available to classify further)
EMI -  electromagnetic induction
ER - electrical resistivity
GDI - geophysical diffraction tomography
GPR - ground penetrating radar
GR - gravity
IP/CP - induced polarization/complex resistivity
IR - infrared
MAG - magnetic
MD - metal detection
MT - Magnetotelluric
S - seismic (used when not enough information available to classify further)
SASW - spectral analysis of surface waves
SLAR - side-looking airborne radar
SP - Self-potential (surface and borehole)
SRR -  seismic refraction
SRL - seismic reflection
TC - telluric current
IDEM - time domain electromagnetic
VSP - vertical seismic profiling

Other Abbreviations

AGWSE - Association of Ground Water Scientists and Engineers (of NWWA/NGWA)
AIMME - American Institute of Mining and Metallurgical Engineers
API - American Petroleum Institute
ASTM - American Society for Testing and Materials
CERI - Center for Environmental Research Information (U.S. EPA)
DNAPL - dense nonaqueous phase liquid
DOE - Department of Energy
EEGS - Environmental and Engineering Geophysical Society (SEMEG prior to 1992)
EPA - Environmental Protection Agency
GWM - Ground Water Management (NWWA/NGWA symposium series)
HMCRI - Hazardous Materials Control Research Institute
NAPL - nonaqueous phase liquid
NTIS - National Technical Information Service
NWWA/NWGA - National Water Well Association (became National Ground Water Association in 1992)
NOAC - National Outdoor Action Conference (NWWA sponsored)
SAGEEP - Symposium on Application of Geophysics to Engineering and Environmental Problems
SEG - Society of Exploration Geophysicists
SEMEG - Society of Engineering and Mineral Exploration Geophysicists (became EEGS in 1992)
SPWLA -  Society of Professional  Well Log Analysts
UST - underground storage tank
VOC - volatile organic compounds
                                                  Vlll

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                                         PREFACE
The Purpose of This Guide

        The use of  geophysical  methods  in the study  of contaminated sites has  gained wide
acceptance in  the  last  decade as  a cost-effective  means  of performing preliminary site
characterization and ongoing monitoring. At the same time, the multiplicity of available methods,
the use of differing terms to describe the same method, and the high degree of technical proficiency
required for the application and interpretation of data from specific methods often causes  confusion
and misunderstanding in the mind of the nongeophysicist.

        There is a moderately large body of scientific literature on the use of geophysical techniques
for ground-water investigations that dates back to the late  1930s. However, with the exception of
perhaps a dozen or so papers published in the 1970s on the use of electrical resistivity methods for
identifying contaminant plumes, the  rapidly  growing amount of literature on the use of geophysical
methods for characterizing and monitoring contaminated sites has been published since  1980.

        The purpose  of this reference guide is four fold:

        1.   To describe both commonly used and less common geophysical methods in relatively
            nontechnical  terms for nongeophysicists involved  in investigating and monitoring
            contaminated sites. To this end, important terms are highlighted the first time they are
            introduced in the text.

        2.   To provide guidance on where to find more detailed information on specific methods,
            through the  use of tables describing major texts and reports, and index tables that
            catalog  references at the end of each chapter according to method and  applications.
            Section  1.4 provides an introduction to the geophysical literature and suggestions on
            how it should be used.

        3.   To provide  information  on designing and evaluating  a geophysical program  at
            contaminated sites, including various tables summarizing the applicability of geophysical
            methods for different aspects  of contaminated site characterization and monitoring
            (Chapter 8).

        4.   To provide summary information on case studies on the use of surface and borehole
            geophysical  methods at contaminated sites  (Appendix A). Summary  tables include
            information on (1) site location, (2)  contaminants involved, (3) site geology, (4) type of
            method  used, and (5) the reference for the case study.
Relationship to Other  EPA Documents

       This guide is intended to complement rather than duplicate other EPA documents that deal
with use of geophysical methods at contaminated sites, although some overlap is  inevitable. The text
is intended to  provide some understanding of basic principles involved in the  use of geophysical
methods and a conceptual framework for understanding the relationship between both commonly

                                             ix

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 used and less commonly used geophysical methods  for nongeophysicists.   This reference guide has
 been designed to serve as a companion to sections 1 and 3 of EPA's Subsurface Field Characterization
 and Monitoring Techniques: A Desk Reference Guide  (U.S. EPA, 1993), * which cover remote
 sensing/surface geophysical and borehole  geophysical  methods, respectively. A number of the
 summary tables from that document also are used in this reference guide to reduce the need to go
 back and forth between the documents. However, users of this guide who are interested in further
 information about the less commonly used geophysical methods may want to refer to the summary
 sheets in the Desk Reference  Guide before seeking out particular references. Table 1-1 (remote
 sensing and  surface geophysical methods)  and Table  7-1 (borehole geophysical  methods)  in this
 guide can be used to locate discussions of specific methods in the Desk Reference Guide.

       This reference guide is not intended to provide guidance on how to use specific geophysical
 methods. EPA's Geophysics Advisor Expert System (Olhoeft, 1992)* is recommended for preliminary
 assistance in  identifying the potential of commonly used surface geophysical methods for site-specific
 conditions. The following EPA documents are recommended for more detailed information on the
 use of the more commonly used geophysical methods at contaminated sites: Geophysical Techniques
for Sensing Buried Wastes and Waste Migration  (Benson et al, 1984),* and A  Compendium of
 Superfund Field Operations Methods, Part 2  (U.S. EPA, 1987).* The Society of Exploration
 Geophysicists' three-volume set, Geotechnical and Environmental Geophysics (Ward, 1990a-c)* is a
 good comprehensive source on theory and applications of geophysical methods  in environmental
 investigations. Other major general references are described  in Table 1-4 for surface geophysics and
 in Table 7-1  for borehole methods. Nongeophysicists who  use this reference guide should consult
 several experts  whenever in doubt about the  capabilities or appropriateness of a specific method (see
 Appendix B).
* See Chapter 1 for full citations,

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                                        CHAPTER 1
                                        OVERVIEW
1.1  General Terminology

       Geophysical techniques are used to assess the physical and chemical properties of soils,
rock and ground water based on the response to  either (1) various parts of the electromagnetic
(EM) spectrum, including gamma rays, visible light, radar, microwave, and radio waves (Figure
l-la,b), (2) acoustic and/or seismic  energy, or (3) other potential fields, such as gravity and the
earth's magnetic field.

       Most portions of the electromagnetic spectrum are used by one or more specific
geophysical methods. In common  usage, however, the term electromagnetic is restricted to
techniques that measure subsurface conductivities by low-frequency electromagnetic induction
(Benson et al, 1984a,b; Nabighian, 1988, 1991). Sections 3.1 discusses additional terminology
used to describe electrical and electromagnetic methods, respectively. Terminology used for
methods involving the radar and microwave portions of the EM spectrum varies considerably
(see Section  6.1.1). The term radioactive/nuclear methods refers to sensing involving the
shortest wavelengths (x-rays and gamma rays).

       Acoustics refers broadly to the phenomena of the vibrations of elastic  bodies  (air, water
or solids)  in response to sound energy. Use of the term seismic usually is restricted to methods
that observe the vibration response of acoustic  energy  in the earth (i.e., all seismic methods are
acoustic, but the term acoustic does not necessarily imply a seismic method). Chapter 5
discusses additional terminology for seismic and acoustic methods.

       In the broadest sense most geophysical techniques involve noninvasive, noncontact remote
sensing; that is, the observation of an object or phenomenon without the sensor being in direct
contact with the object being sensed.  In common usage, however, the term remote sensing is
often restricted to the use  of airborne or satellite sensing methods in the visible and near-visible
                                            1-1

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Figure 1-la   The electromagnetic spectrum: customary divisions  and portions  used for

                geophysical measurements (adapted from Erdelyi and Galfi, 1988).
           Chemical
           elements
        Oil pollution

    Shape, size.
    position.
    luminescence
    gas-absorption
    Shore-lines.
    Water bodies
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                                                              visible suspended.
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Figure 1-lb    The electromagnetic spectrum: factors and phenomena influencing the
                radiation of electromagnetic waves (adapted from Erdelyi and Galfi, 1988).
                                               1-2

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portions of the EM spectrum.  While nondestructive testing (NDT) has been used to describe
geophysical methods used in the context of detecting contained, subsurface hazardous waste
(Lord and Koerner 1987), the term usually is restricted to methods for testing the integrity of
manufactured materials.

       Terminology in the published literature, particularly for electrical and electromagnetic
methods, can vary considerably. This can be dealt with in two ways: (1) by becoming familiar
with the variety of terms that are applied to a single method and (2) by understanding the basic
principles of different  methods so that a method can be identified by reading a description of the
equipment and field techniques used (Nabighian, 1988, 1991).
1.2  Uses of Geophysical  Methods

       The greatest benefits of geophysical methods come from using them early in the site
characterization process since they are typically nondestructive, less risky, cover more area
spatially and volumetrically, and require less time and cost than using monitoring wells. On the
other hand, great skill is required in interpreting the data generated by these methods, and their
indirect nature creates uncertainties that can only be resolved by use of multiple methods and
direct observation. Consequently, preliminary site characterization by geophysical methods will
usually be followed by direct observation through the installation of monitoring wells.

       Geophysical techniques can be used for a number of purposes in ground-water
contamination studies:
              Geologic characterization, including assessing types and thicknesses  of strata and
              the topography of the bedrock surface below unconsolidated material, and
              generating fracture mapping and paleochannels.
              Aquifer  characterization, including  depth to water table, water quality, hydraulic
              conductivity,  and fractures.
              Contaminant  plume identification, both vertical and horizontal distribution
              including monitoring changes  over time.
                                            1-3

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              Locating buried wastes and other anthropogenic features through  identification  of
              buried metal drums, subsurface trenches, and other features (e.g., cables,
              pipelines).
       The use of surface geophysical methods for prospecting for ground water using electrical
resistivity methods dates from the late 1920s.  A review of geophysical methods for water
exploration by  Breusse (1963) focuses  almost  exclusively on electrical resistivity methods.
Electrical resistivity continued to be the most  commonly used surface method for the study of
ground water until the early 1980s when electromagnetic induction gained increasing popularity
for near-surface investigations.  The next most frequently used surface method for the study of
ground water has been seismic refraction, dating primarily from the  1960s although there are
scattered references in the literature back to 1949  (see Table 5-2).

       Early successes in the 1970s using electrical methods (i.e., measurement of variations in
conductivity or its reciprocal, resistivity) to locate contaminant plumes and measure the
hydrogeologic  properties of aquifers led to the adaptation of a large  number of geophysical
methods in ground-water contamination investigations. Then, in the  late 1970s the availability of
microcomputers revolutionized the use of field geophysics by allowing onsite processing of the
vast amount of data generated by most of these techniques.  Use of geophysical methods in
hydrogeologic  studies became so widespread in the 1980s that techniques such as electromagnetic
induction, seismic refraction, ground-penetrating radar, and  magnetometry are no longer
considered innovative but state-of-the-practice. Innovations  in these and numerous other
geophysical methods continue at a  rapid rate.  Time domain electromagnetic methods (Section
4.2), shallow seismic reflection (Section 5.2), and seismic shear methods have been used with
increasing frequency since the mid 1980s.
1.3  General Characteristics  of Geophysical  Methods

       1.3.1 Airborne,  Surface, and  Downhole  Methods

       Geophysical investigation techniques can be broadly grouped into three categories: (1)
airborne, (2) surface,  and (3)  borehole or downhole methods. Airborne remote sensing and

                                           1-4

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geophysical methods are discussed in Chapter 2.   Surface methods usually involve wave
generators and sensors at or near the ground surface.  In this reference guide surface methods
are covered in four chapters: electrical (Chapter 3), electromagnetic (Chapter 4), seismic and
acoustic (Chapter 5), and other surface methods, including ground penetrating radar, magnetic,
gravimetric, and thermal methods (Chapter 6). (Table  1-1 provides an overview of the major
uses and depth of penetration  of airborne and surface geophysical methods; section numbers arc
provided indicating where additional discussion can be found in Subsurface Field
Characterization and Monitoring Techniques [U.S.  EPA  1993]). Downhole methods,  including
single borehole, hole-to-hole, and surface-to-borehole methods, also are covered (Chapter 7), and
a number of summary tables are provided on the characteristics and uses of borehole geophysical
methods.

       Each of these three major categories comprises numerous specific techniques, and a
specific technique may have a  number of variants.  Table 1-2 describes seven major surface
geophysical  methods and  their  hydrogeologic applications.  Electromagnetic  induction  (see
Section 4.1) also is commonly used in both airborne and downhole studies. Electrical resistivity
(see Section 3.2) also is commonly used as a downhole method, but cannot be used as an
airborne method because  it requires  ground contact.  Ground penetrating radar  (see  Section
6.1) can be used from the air, but is most commonly used on the ground surface and, less
frequently, in boreholes.   Seismic refraction (see Section  5.1) is  primarily a surface method,
although vertical seismic profiling is a relatively new downhole method that has been used in
several  studies of contaminated sites (see Section 7.3.3). Magnetometry and gravimetrics are
used as  airborne methods  where large areas need to be evaluated, but site-specific investigations
generally require  use of surface measurements (see Sections 6.2 and 6.3). Thermal methods are
most commonly used in downhole investigations (see Section 6.4), but shallow measurements
have been used in the study of ground water (see  Section 6.4.1).  Radioactive methods in the
study of ground water (not shown on Table 1 -2) are used almost exclusively as a downhole
method, but instruments that detect ionizing radiation are widely used as a surface technique at
sites involving radioactive  wastes. Various types of radiation monitoring instruments, such as
proportional, Geiger-Mueller, and scintillation counters, can be used to detect radioactive
contamination.  Surface radiation detection methods are not covered further in this guide, but
additional information can be  found in U.S EPA  (1993-Section 1.5.4).
                                           1-5

-------
 Table 1-1 Summary Information on Remote Sensing and Surface Geophysical Methods (all ratings are approximate and for general guidance
          only)
 Technique
 Soils/
 Geology
 Leachate
 Buried
 Wastes
                          NAPLs
             Penetration
             Depth (m)"
                  Cost'
           Section in
           U.S EPA (1993)
 Airborne Remote Sensing and Geophysics
 Visible Photography*
 Infrared Photography+
 Multispectral Imaging
 Ultraviolet Photography
 Thermal Infrared Scanning
 Active Microwave (Radar) +
 Airborne Electromagnetics
 Aeromagnetics
 yes
 yes
 yes
 yes
 yes
 yes
 yes
 yes
 Surface Electrical and Electromagnetic Methods
 Self-Potential
 Electrical Resisthity+
 Induced Polarization
 Complex Resistivity
 Dielectric Sensors
 Time Domain Reflectometry
 Capacitance Sensors
 Electromagnetic Inductions-

 Transient Electromagnetics
 Metal Detectors
 VLF Resistivity
 Magnetotellurics

 Surface Seismic and Acoustic Methods

 Seismic Refractions-
 Shallow seismic Reflection+
 Continuous Seismic Profiling
 Seismic Shear/Surface Waves
 Acoustic Emission Monitoring
 Sonar/Fathometer

 Other Surface Geophysical Methods

 Ground Penetrating Radars-
 Magnetometrys-
 Gravity
 Radiation Detection

 Near-Surface Geothermometry
yes
yes
yes
yes
yes
yes
yes
yes

yes
no
yes
yes
yes
yes
yes
yes
yes
yes
yes
no
yes
no
 yes
 yesc
 yes1
 yes1
 yes (T)
 possibly
 yes (C)
 no
yes (C)
yes (C)
yes (C)
yes (C)
yes (C)
yes (C)
yes (C)
yes (C)

yes (C)

yes (C)
yes (C)
yes
no
no
no
no
yes
yes (C)
no
yes
no
 possibyd
 possibly'
 no
 no
 possibly'
 no
 yes
 yes
yes
yes (M)
yes
yes
no
no
no
yes

yes
yes
yes
no
no
no
no
no
no
no
yes
yes1
yes1
yesc
possibly
possibly
possibly
possibly
possibly
yes
possibly
yes
possibly
possibly

no
no
no
no
no
no
no
no
no
no
yes         yes
yes(F)      no
no          no
yes (nuclear) no
Surf, only
Surf, only
Surf, only
Surf, only
Surf, only
0.1-2
0-100
lOs-lOOs
S?
S 60 (km)
S km
S km
S2e
S2°
S2e
S 60(200)/
   c 15(50)
S 150 (2000+)
C/S 0-3
C/S 20-60
S 1000+
S 1-30(200+)
S 10-30(2000+)
C 1-100
S 2  lOs-lOOs
S2'
C no limit
            C 1-25 (100s)
            C/S 0-20,
            S 100s+
            C/S near surface
 L
 L-M
 L
 L
 M
 M
 M
 M
L
L-M
L-M
M-H
L-M
M-H
L-M

L-M
M-H
L
M-H
M-H
L-M
M-H
L-M
M-H
L
L-H
                 M
                 L-M
                 H
                 L
1.1.1
1.1.1
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
1.2.1
1.2.2,9.1.1
1.2.3
1.2.3
6.2.3
6.2.4
6.2.4

1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
          1.5.1
          1.5.2
          1.5.3
          1.5.4
Soil Temperature
Ground-Water Detection
Other Thermal Properties
yes
yes
yes
yes (T)
yes (T)
no
no
no
no
no
no
no
S l-2e
S2'
S l-2e
L
L
L-M
1.6.1
1.6.2
1.6.3
Boldface = Most commonly used methods at contaminated sites; + = covered in Supcrfund Field Operations Manual (U.S. EPA 1987);
(C) = plume detected when contaminant(s) change conductivity of ground wateer (F) = ferrous metals only (T) = plume detected by
temperature rather than conductivity.
"S = station measurement C = continuous measurement. Depths are for typical shallow applications; ( ) = achievable depths.
'Ratings are very approximate L  = low, M = moderate, H = high.
clf leachate or NAPLs are on the ground or water surface or indirectly affect surface properties; field confirmation required.
'Disturbed areas that may contain buried waste can often be detected on aerial photographs.
'Typical maximum depth, greater depths possible, but sensor placement is more difficult and cable lengths must be increased.
'For ferrous metal detection, greater depths require larger masses of metal for detection; 100s of meters depth can be sensed when using
magnetometry for mapping geologic structure.
                                                     1-6

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Table 1-2 Major Surface  Geophysical  Methods  for  Study  of Subsurface  Contamination
Method
Description
Hydrogeologic
Applications
Electromagnetic
induction (EMI)
(Section  4.1)
DC electrical
Resistivity
(Section 3.2)
Seismic refraction
(Section 5.1) and
reflection (Section
5.2)
Magnetometry
(Section 6.2)
Uses a transmitter coil to
generate currents that induce a
secondary magnetic field in the
earth that is measured by a
receiver  coil. Well suited for
areal searches.
Measures the resistivity of
subsurface materials by injecting
an electrical current into the
ground by a pair of surface
electrodes and measuring the
resulting potential field (voltage)
between a second pair of
electrodes.

Uses a seismic source (commonly
a sledge hammer), an array of
geophones to measure travel time
of the refracted/reflected seismic
waves, and a seismograph that
integrates the data from  the
geophones.

Uses a magnetometer to measure
the intensity of the earth's
magnetic field.  The presence of
ferrous metals can be detected by
the variations they create in the
local magnetic field.
Can be used to map a wide variety of
subsurface features including natural
hydrogeologic conditions,  delineation
of contaminant plumes, rate of
plume movement, buried wastes, and
other artificial features (e.g., buried
drums, pipelines). Depth of
penetration is typically up to 60
meters but depths to 200+ meters
are possible.1

Similar to electrical conductivity (see
above), except not widely used to
detect metallic objects, for which
magnetic and EMI methods are
more effective. Better for depth
sounding than frequency domain
EMI.
Can be used to define the thickness
and  depth to bedrock or water table,
thickness of soil and rock layers, and
their composition and physical
properties; may detect anomalous
subsurface features such as pits and
trenches.b

Used to locate buried metal drums
that  may be sources of soil and
ground-water contamination.
                                        1-7

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                                      Table  1-2 (cont.)
Method
Description
Hydrogeologic
Applications
Ground
penetrating radar
(GPR) (Section
6.1)
Gravimetry
(Section 6.3)
Thermal (Section
6.4)
Uses a transmitter coil to emit
high-frequency radio waves that
are reflected off subsurface
changes in electrical properties
(typically  density and water-
content variations) and detected
by a receiving antenna.
Uses one or more of several
types of instruments that measure
the intensity of the earth's
gravitational field.
Uses temperature  sensors
anomalies in the soil or surface
water.
Can map soil layers, depth of
bedrock buried stream channels,
rock fractures, cavities in natural
settings, buried waste materials.
Maximum depth of penetration
under favorable conditions is around
25 meters. 100s of meters
penetration may be possible in  highly
resistive materials (salt or ice).

Can be used to estimate depth of
unconsolidated material over
bedrock and boundaries of landfills,
which have a different density than
natural  soil material. Microgravity
surveys may be able to detect
subsurface cavities and subsidence
voids.

Can be used to delineate shallow
ground-water flow systems, buried
valley aquifers, recharge and
discharge zones, zones of high
permeability, leakage beneath
earthen dam  embankments, and
location of solution channels in karst.
"Depth of penetration more than 2,000 meters is possible with use of time domain methods (Section
4.2).

bHigh resolution shallow seismic reflection is increasingly being used as an alternative to seismic
refraction. Minimum depth resolution is typically 10 meters but it can be as shallow as 3 meters
(Section 5.2).

-------
       1.3.2 Natural  versus Artificial  Field Sources

       Geophysical methods can be broadly classified according to whether the field source for
which a subsurface response is measured is natural or artificial. Table 1-3 classifies 25 surface
geophysical methods  according to the type of field source. The majority of geophysical methods
use artificial field sources, and all of the methods most commonly used at contaminated site,
except magnetometry, measure artificial sources. Artificial sources have the advantage of being
controlled more easily.

       133 Measurement  of Geophysical  Properties

       Most of the geophysical techniques discussed in this reference guide operate in a portion
of the electromagnetic spectrum.  Electromagnetic radiation can be described in terms of
wavelength, the distance between two crests of a wave of electrical energy in a medium, and
frequency, the  number of waves measured passing a certain point in the medium in the course of
one second (i.e., cycles per second, often abbreviated, as Hz after Heinrich Hertz,  the  discoverer
of radio waves).  The geoelectrical  or geoelectromagnetic properties of earth materials vary as a
result of physical properties such as porosity, density, fracturing, water content, and water
chemistry.  Most electrical and electromagnetic geophysical methods involve the inference of
subsurface lithology,  structure, and/or  aquifer location as well as character from measurements
of subsurface  response to electrical or electromagnetic currents. These currents can be natural
or induced  as  noted above, and the measurements can  be in the frequency domain or in the
time domain (see Section 3.1.1).

       In contrast to  electromagnetic methods, seismic methods record the speed with which
reflected or refracted  sound waves (acoustic energy) move from the source to sensors  at various
distances from the  source (see Chapter 5). Gravitational methods  involve the sensing of
variations in the mass of subsurface materials through measurement of gravitational acceleration
or potential.

       Geophysical methods tend to measure a larger volume of the subsurface than monitor
wells, thereby increasing the volume sampled for a given measurement. This is usually an
                                            1-9

-------
Table 1-3 Classification of Surface Geophysical  Methods
Natural Field Source
Artificial Controlled Source
                                         Electrical
Self-Potential (SP)
DC Electrical  Resistivity (ER)
Induced Polarization (IP)
Complex Resistivity
                                      Electromagnetic
Telluric Current (TC)
Magnetotellurics (MT)
  Audio-Frequency MT (AMT)
  Audio-Frequency Magnetic (AFMAG)
  MT  Array  Profiling   (EMAP)
Electromagnetic  Induction (EMI)
Time Domain EM (TDEM)1
Very Low Frequency (VLF) Resistivity
Controlled-Source Audiomagneto-
 Telluncs (CSAMT)
Metal Detectors  (MD)
                                     Seismic/Acoustic
Acoustic Emission Monitoring
Seismic Refraction (SRR)
Shallow Seismic Reflection (SRL)a
Continuous Seismic Profiling (CSP)
Seismic Shear
Spectral Analysis of Surface
 Waves (SASW)
Side-Scan  Sonar
Fathometer
                                      Other Methods
Magnetometry
Microgravimetry
Natural Geothermalc
Ionizing Radiation0
Ground Penetrating Radar (GPR)b
Boldface = Most commonly used methods at contaminated sites.

"Relatively recent improvements in instrumentation and methods for data analysis have resulted
in increased use of TDEM and SRL.
bGPR is technically an electromagnetic method that uses microwave and high frequency radio
waves, but is listed here to differentiate it from other electromagnetic methods that use low
frequency and audio portions of the spectrum  (see Figure 1-1)
cBoth temperature and radioisotopes can be used as artificial tracers in ground-water studies.
                                       1-10

-------
advantage, but can be a disadvantage if a feature or anomaly is so small that it escapes detection
in a larger sampled volume.  Data from these methods can be acquired in the form of (1)
profiles, which record changes in measured properties in a linear transect along the ground
surface, or (2) soundings, which measure vertical changes in the measured properties.

       Multiple parallel profiles, using methods such as electromagnetic induction and magnetic
and gravity surveys,  create an areal view of the properties being measured that can be displayed
two-dimensionally as contours of equal values  (isopleths) or graphically to represent  the data
three dimensionally.  Figure l-2a,b shows two- and three-dimensional portrayals of the  same
data. The three-dimensional perspective shown  in Figure l-2b should not be mistaken  for a
physical representation of the subsurface, such as is provided by seismic methods (Chapter 5) and
ground penetrating radar (see Section 6.1). A three-dimensional view can be obtained  either by
(1) taking multiple vertical soundings in a two-dimensional grid at the surface  or (2)  multiple
profiles with different depths of measurement along the same transect. The term resolution is
used to describe how well a method can measure changes in features horizontally (lateral
resolution) and in sounding (vertical resolution).

       Profile measurements can  be either stationary or continuous  (Benson  et al., 1984a,b).
Stationary  or station measurements are taken at discrete  intervals,  whereas continuous  methods
measure subsurface parameters continuously along a survey line. Figure 1-3 shows the difference
in output from the two types of measurements.   The figure shows that continuous measurements,
where feasible, provide better resolution; nonetheless, most traditional geophysical techniques
involve station measurement. Continuous methods, such as short-coil spacing electromagnetic
induction (EMI) and ground penetrating radar (GPR), commonly have shallower depths of
penetration than methods involving station  measurements, but are still preferred  when applicable
since they  can approach 100-percent site coverage. In fact, all techniques that appear to be
operating continuously (e.g., EMI, GPR) make point-by-point measurements, but at such small
intervals that the resolution is the best that  can  be achieved by the particular instrument.

       When station measurements are  made, the measurement interval should be small  enough
to achieve  adequate resolution.  In Figure 1-3, for example, the sampling interval for  the station

-------
Figure l-2a Ways of presenting areal geophysical measurements: an isopleth map of electrical
             conductivity measurement  (from  Benson et  al.,  1984a).
Figure l-2b Ways of presenting areal geophysical measurements: a 3-dimensional view of
             the data in Figure l-2a (from Benson et al., 1984a).
                                   1-12

-------
                                                             Station Measurements
                                                          Continuous Measurements
Figure  1-3    Discrete sampling versus continuous geophysical measurements (from Benson et al,
              1984a).
                                        1-13

-------
measurements is sufficient to portray the slowly varying component, but failed to detect the
highly localized anomalies that are apparent in the continuous measurement.
1.4 Introduction to the Geophysical Literature

       1.4.1 General  Geophysics

       Historically, geophysical field methods have been primarily the domain of petroleum and
mineral exploration geologists, and textbooks written from this perspective remain important
source of information on basic theory and application of geophysical methods in the study of
contaminated sites. Table 1-4 lists 21  basic geophysics texts along with the major methods
covered in each. The reference section of this chapter provides detailed annotations of methods
covered by individual texts (abbreviations in these annotations are defined in the Glossary to this
guide). Older texts can provide useful information on basic principles, and even newer texts can
become rapidly outdated with respect to specific methods. Information on the latest
developments in geophysical methods is most likely to appear in the exploration-oriented
geophysical journals:  Geophysics,  Geophysical  Prospecting, and Geoexploration (renamed
Journal of Applied Geophysics in 1992).'The expanded  abstracts of the annual meeting of the
Society of Exploration Geophysicists  (SEG) is another important source of information on recent
developments in geophysical methods (Table 1-5).

       1.4.2    Ground Water and Contaminated Sites

       Table 1-5 describes bibliographies, general reports, and proceedings of conferences and
symposia  that focus primarily on the application of surface geophysical methods in the study of
ground water and contaminated sites.  Zohdy et al. (1974), although a relatively old document, is
still the best single report covering applications for ground-water investigations. Benson et al.
(1984a,b)  is the best single reference on applications of surface geophysical methods at
contaminated sites.
    'See Appendix B for publishers' addresses.
                                         1-14

-------
Table 1-4 General  Texts on Geophysics
Reference
Topics
Beck (1981)
d'Amaud Gerkins (1989)
Dobrin and Savit
 (1988)

Eve and Keys (1954)
Grant and West (1965)
Griffiths and King
 (1981)
Hansen et al. (1967)


Heiland (1940, 1968)



Howell (1959)


Jakosky (1950)

Kearey and Brooks
 (1991)

Milsom (1989)
Exploration: electrical, self potential, induced polarization, gravity,
magnetic, electromagnetic, seismic, radioactive, well logging.

Exploration Geophysics: seismic refraction and reflection, gravity,
magnetic, self potential, telluric current, magnetotelluric currents,
electrical resistivity, induced polarization, electromagnetic induction
(including airborne), time domain EM, radiometric.

Geophysical prospecting: seismic refraction and
reflection,  gravity,  magnetic, electrical, electromagnetic.

Mineral exploration: magnetic, electrical, electromagnetic, gravity,
seismic,  radioactive,  geothermal.

Interpretation theory in applied geophysics: seismic refraction and
reflection,  gravity,  magnetic, electrical resistivity,  electromagnetic
induction.

Applied geophysics for engineers and geologists:
electrical resistivity, electromagnetic, seismic refraction and
reflection, gravity,  magnetic.

SEG edited volume on mining geophysics: electrical
electromagnetic, magnetic, gravity.

Geophysical exploration: seismic, acoustic, electrical resistivity self
potential, electromagnetic induction, metal detection, magnetic,
gravity, radiometric, borehole, soil gas.

Introductory geophysics text  focusing on seismology, gravity,
geomagnetism.

Exploration geophysics: seismic, resistivity, magnetic, gravity.*

Geophysical  exploration: seismic,  gravity, magnetic,
electrical,  electromagnetic.

Field geophysics.*
                                        1-15

-------
                                       Table 1-4  (cont.)
Reference
Topics
Nettleton (1940)


Parasnis (1975)



Parasms (1979)
Robinson and Coruh
 (1988)
Sharma(1986)


Sheriff (1989)



Telford et al. (1990)



Van Blaricom (1980)

Ward  (1990a-c)
Oil exploration: gravity,  magnetic, seismic, electrical (including well
logging).

Mining geophysics: magnetic, self potential,  electromagnetic,
electrical, induced polarization, gravity, seismic, radioactive,
airborne magnetic, electromagnetic

Applied geophysics: magnetic, gravity, electrical, induced
polarization, electromagnetic, seismic, radioactive, miscellaneous
(borehole magnetometer, gamma and neutron logging,
geothermal).

Basic exploration geophysics: seismic refraction and reflection,
gravity, magnetic, electrical resistivity, induced polarization, self
potential, telluric currents, electromagnetic induction, borehole.

Geophysical methods in geologc seismic, gravity, magnetic, earth
resistivity,  radiometries,  geothermal.

Geophysical methods: gravity, magnetic,  radioactivity,  heat flow,
electrical and electromagnetic, seismic (16 chapters), borehole
measurements, remote sensing.

Applied geophysics with emphasis on deep exploration: gravity,
magnetic, seismic reflection/refraction, electrical methods (ER, SP,
IP),  electromagnetic (EMI, TDEM), radiometric, borehole.

Practical  geophysics.*

Edited, three-volume series on geotechnical and environmental
geophysics. Volume 1 covers basic concepts, Volume 2 covers
environmental and ground-water applications (34 papers), and
Volume 3 covers geotechnical applications (23 papers).
* All topics covered by text not listed here.

Note: See Table 7-1 for general references on downhole methods.
                                     1-16

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Table 1-5 Bibliographies, Reports,  and Symposia  Focusing  on Application of Surface  Geophysical
Methods to  Ground Water and Contaminated  Sites
Reference
Description
Bibliographies

Handman (1983)
Johnson and Gnaedinger
 (1964)
Lewis and Haeni (1987)



Rehm et al. (1985)



van der Leeden (1991)

Glossary

Sheriff (1968, 1991)
Bibliography of more than 550 USGS publications on hydrologic and
geologic aspects of waste management. Index identifies 15 on geophysical
methods.

Bibliography prepared for ASTM symposium on soil exploration
containing over 300 references on air photo interpretation, surface
electrical resistivity and seismic methods, and borehole geophysics.

Bibliography on use of surface geophysical methods for detection of
fractures in bedrock with annotations to 31 English-language references
and  12  foreign-language references.

Section 5 covers hydrogeologic applications of surface geophysics;
Bibliography in Section 6 contains over 300 references on surface
methods.

Over 100 references on geophysical methods relevant to ground water.
 1968 glossary of terms used in geophysical exploration and 1991
encyclopedic dictionary of exploration geophysics.
Texts/Reports on Ground Water Applications
Redwine et al. (1985)




Rehm et al. (1985)

USGS (1980)



Ward (1990b)


Zohdy et al. (1974)
Ground-water manual for electric utility industry. Chapter 3 of Volume 3
covers surface geophysical methods (SRR, SRL, CSP, ER, SP, EMI,
sonar, GPR, GR) and borehole methods with a focus on seismic
techniques.

See description under Bibliographies.

Chapter 2 (Groundwater) of the Handbook of Recommended Methods
for Water Data Acquisition  covers geophysical methods: TC, MT, AMI,
EM I, ER, IP, SRR, GR, BH.

Volume 2 contains 34 papers on environmental and ground-water
applications of geophysical methods.

Manual on use of surface geophysical methods in ground-water
investigations covers electrical, seismic refraction, gravimetric, and
magnetic techniques.
                                                1-17

-------
                                          Table  1-5 (cont.)
Reference
Description
Texts/RePorts  on Contaminated Site Applications
Aller (1984)



Benson et al. (1984a,b)


Costello (1980)


EC&T (1990)



Frischknecht et al.  (1983)


HRB-Singer (1971)



Lord and Koerner (1987)




O'Brien and Gere (1988)



Olhoeft (1992a)




Pitchford et al. (1988)




U.S. EPA (1987b)
EPA report on methods for determining the location of abandoned wells.
Covers: air photos, color/thermal IR, ER, EMI, GPR, MD, MAG,
combustible gas  detectors.

EPA report focusing of GPR, EM I, resistivity, seismic refraction, and
metal detection for sensing buried wastes and contamination migration.

U.S. Army Toxic and Hazardous Materials Agency report on surface and
borehole geophysical techniques.

U.S. Army Toxic and Hazardous Materials Agency manual on
construction environmental site  survey and clearance procedures covering
GPR, EMI, magnetometry, metal detection, and soil gas surveys.

Evaluation of  geophysical methods  for locating abandoned wells prepared
by U.S. Geological Survey.

Report on use of geophysical methods for detection of abandoned
underground mines.  Methods evaluated:  included induced polarization,
self potential,  and VLF.

EPA report evaluating metal detectors, electromagnetic induction, ground
penetrating radar, and magnetometers for locating buried containers.
Supporting reports on 17 distinct nondestructive testing (NDT) methods
were prepared prior to selection of four methods that were field-tested.

Text on engineering aspects of hazardous waste site remediation that
includes review of major surface geophysical  methods:  SRR, SRL, ER,
EM, GPR, MAG.

Geophysics advisor expert system developed for U.S. EPA. Makes
suitability ratings for specific methods based on site-specific inputs.
Includes: ER, EMI, complex resistivity, SRR, SRL, GPR, GR,
radiometric, soil  gas.

Report summarizing results of geophysical investigations at four Air
Force bases. Includes review of major geophysical methods (EM I, ER,
complex resistivity, GPR, SRR,  SRL, MAG, MD) and guidelines for
planning a geophysical investigation.

EPA compendium on Superfund field operations methods. Section 8
covers DC resistivity,  electromagnetic induction, ground-penetrating
radar, magnetic and seismic methods.
                                         1-18

-------
                                          Table 1-5  (cont.)
Reference
Description
Texts on Geologic and Entineering Applications
Taylor (1984)
U.S. Army Corps of
 Engineers  (1979)
Ward (1990c)

Conferences/Symposia

Garland (1989)



Morley (1970)
NWWA (1984, 1985, 1986)*
SEG (various dates)*
SEMEG/EEGS
 (1988-present)*
Thomas and Dixon (1989)
Van Eeckhout and Calef
 (1992)
Report prepared for U.S. Bureau of Mine evaluating surface geophysical
methods for characterizing hydrologic properties of fractured rock.

Manual on geophysical techniques focusing on engineering
applications. Surface methods include Seismic refraction and reflection,
surface waves, sonar, ER, GR; borehole methods include seismic,
electrical, nuclear.

Volume 3 contains 23 papers on geotechnical  applications of geophysical
methods.
Proceedings of symposium on exploration geophysics published by the
Ontario Geological Survey with 77 papers covering electromagnetic,
induced polarization,  seismic, radiometric and remote  sensing.

Proceedings of the Canadian Centennial Conference on Mining and
Groundwater Geophysics (Niagara Falls, 1967). Contains state-of-the-art
review papers  on gravity, ground and airborne electromagnetic methods,
induced polarization, and seismic methods, and 11 papers on ground-
water applications.

Proceedings of conferences on surface and borehole geophysical methods
in ground-water  investigations. The 1984, 1985, and 1986 proceedings
contain, respectively,  36, 19, and 24 papers on surface geophysical
methods. These  papers are indexed in the remaining chapters  of this
guide.

The Society of Exploration Geophysicists held its 61st annual meeting in
1991. Technical program presentations at the annual meetings are
published as expanded abstracts of 1,000 to 2,000 words. The 1991
technical program was published as 2 volumes totaling 1,707 pages.

The Society of Engineering and Mineral Exploration Geophysicists
(SEMEG) has held an annual symposium titled Symposium on
Application of Geophysics to. Engineering and Environmental  Problems
(SAGEEP) since 1988. In 1992 SEMEG changed its name to  the
Environmental and Engineering Geophysical  Society.

Proceedings of workshop with 25 papers on geophysical studies used to
characterize the  area in the vicinity of the Chalk River Nuclear
Laboratory, Ontario.
Summary of workshop on site characterization using geophysical methods.
* See Appendix B.2 for addresses.
                                       1-19

-------
       Information on the latest developments in application of geophysical methods in the
 investigation of ground water and contaminated sites is most likely to appear in the
 hydrogeologic  journals  Ground Water and Ground Water Monitoring  Review (renamed Ground
 Water Monitoring and  Remediation in 1993). Other important journals include Water  Resources
 Research and Journal  of Hydrology.2

       The Symposium on the Application of Geophysics  to  Engineering and  Environmental
 Problems (SAGEEP), sponsored by the Society of Engineering and Mineral Exploration
 Geophysicists (SEMEG), has been held annually since 1988 and is an  exceptional source of
 information on hydrogeologic and contaminated site applications. Each volume of proceeding
 includes several applications-oriented review papers and numerous case studies. In 1992,
 SEMEG became the Environmental and  Engineering Geophysical  Society  (EEGS), which
 continues to sponsor the SAGEEP.

       Another important source of information on recent developments are a number of
 symposium series sponsored by the National Water Well Association (NWWA) or the affiliated
 Association of  Ground Water Scientists and Engineers (AGWSE), and the Hazardous Materials
 Control Research Institute (HMCRI). NWWA changed its name  to the National Ground Water
 Association (NGWA) in 1992. Table 1-6 lists the year and title of a number of these
 conference/symposium series. Proceedings of the NWWA'S  annual National Outdoor Action
 Conference  (NOAC) on Aquifer  Restoration, Ground  Water Monitoring  and Geophysical
 Methods  (titled National Symposium  on  Aquifer Restoration  and  Ground  Water Monitoring
 prior to 1987) generally provide the largest number of papers related to geophysical  methods.
 The NWWA regional ground-water issues conferences typically have at least six papers related to
 use of geophysical methods.

       The annual  Conference  on Petroleum Hydrocarbons and Organic  Chemicals  in  Ground
Water—Prevention, Detection and Restoration,  sponsored jointly by NWWA and  the American
 Petroleum Institute, is an important source for papers on developments in the use of geophysical
 methods  for detection of hydrocarbons. Proceedings from the HMCRI's annual Hazardous
    2 See Appendix B for publishers' addresses.
                                           1-20

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Table 1-6 Conferences and Symposia Prceedirrgs with Papers Relevant to Subsurface Characterization and Monitoring
 Sponsor
                  Year
                            Title
 SEMEG
NWWA
NWWA/API
Geophysics

NWWA/EPA



Vadose Zone

NWWA/EPA
1988       [1st] Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP)
1989       [2nd] (SAGEEP '89)
1990       [3rd] (SAGEEP '90)
1991       [4th] (SAGEEP'91)
1992       [5th] (SAGEEP '92)

1981       1st National Ground Water Quality Monitoring Symposium and Exposition
1982      2nd National Symposium on Aquifer Restoration and Ground Water Monitoring
1983      3rd
1984      4th
1985      5th
1986      6th
1987       1st National Outdoor Action Conference on Aquifer Restoration, Ground Water Monitoring, and Geophysical,
          Methods
1988      2nd
1989      3rd
1990      4th GWM 2
1991      5th GWM 5
1992      6th GWM 11

1984       [1st] Conference on Petroleum Hydrocarbons and Organic Chemicals in Ground Water—Prevention, Detection
          and Restoration
1985      [2nd]
1986      [3rd]
1987      [4th]
1988      [5th]
1989      [6th]
1990      [7th] GWM 4
1991      [8th] GWM 8
1992      [9th] GWM 14
1984      [1st] Conference on Surface and Borehole Geophysical Methods in Ground Water Investigations
1985      [2nd]
1986      Surface and Borehole Geophysical Methods and Ground Water Instrumentation Conference and Exposition
1983      [1st] Conference on Characterization and Monitoring in the Vadose (Unsaturated) Zone
1985      [2nd]
1986      3rd
Karst

NWWA
1986      [1st] Conference on Environmental Problems in Karst Terranes and Their Solutions
1988      2nd
1991       3rd Conference  on Hydrogeology, Ecology, Monitoring and Management of Ground Water in Karst Terranes
          GWM 10
Miscellaneous NWWA Conferences

NWWA/AGWSE  1989

                 1990
                  1991
          Conference on New Field Techniques for Quantifying Physical and Chemical Properties of Heterogeneous
          Aquifers
          Cluster of Conferences (Agricultural Impacts on Ground Water Quality Ground Water Geochemist, Ground
          Water Management and Wellhead Protection; Environmental Site Assessments: Case Studies and Strategies)
          GWM1
          Environmental Site Assessments Case Studies and Strategies: Tire Conference GWM 6
                                                  1-21

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                                                         Table 1-6 (cont)
 Sponsor           Year      Title
NWWA Eastern Regional Conferences

NWWA/AGWSE 1984      [1st] Eastern Regional Ground Water Conference
                  1985      [2nd]
                  1986      3rd Annual Eastern Regional Ground Water Conference
                  1987      4th
                  1988      [5th] Focus Conference on Eastern Regional Ground Water Issues
                  1989      [6th]
                  1990      [7th] GWM 3
                  1991      [8th] GWM 7
                  1992      [9th] GWM 13

Other NWWA Regional Conferences

NWWA          1983      Eastern Regional Conference on Ground Water Management
                            Western Regional Conference on Ground Water Management
                  1984      Conference on Ground Water Management
                  1985      Southern  Regional Ground Water Conference
                            Western Regional Ground Water Conference
                  1986      Conference on southwestern Ground Water Issues
                            Focus Conference on Southeastern Ground Water Issues
                  1987      Focus Conference on Midwestern Ground Water Issues
                            Focus Conference on Northwestern Ground Water Issues
                  1988      [2nd]  Focus Conference on Southwestern Ground Water Issues

Hazardous Materials Control Research Institute Conferences

HMCRI          1980      1st National Conference on Management of Uncontrolled Hazardous Wastes Sites
                  1981       2nd
                  1982      3rd
                  1983      4th
                  1984      5th
                  1985      6th
                  1986      7th
                  1987      8th Superfund  '87
                  1988      9th Superfund  '88
                  1989      10th Superfund '89
                  1990      llth Superfund '90
                  1991       12th Hazardous Materials Control (HMC-Superfund '91)
                  1992      13th HMC-Superfund '92

HMCRI          1984      1st National Conference on Hazardous Wastes and Environmental Emergencies
                  1985      2nd
                  1986      3rd National Conference on Hazardous Wastes and Hazardous Materials
                  1987      4th
                  1988      5th (HWHM '88)
                  1989      6th (HWHM '89)
                  1990      7th (HWHM '90)


[ ] indicate that number is not included in the title of the published proceedings.
GWM indicates that proeeedings have been published in NWWA's Ground Water Management Series.
Abbreviations
AGWSE          Association of Ground Water Scientists and Engineers (NWWA)
API               American Petroleum  Institute
EPA              U.S. Environmental Protection Agency
HMCRI           Hazardous Materials  Control Research Institute
NWWA          National Water Well  Association (name changed to National Ground Water Association in 1992)
SEMEG          Society of Engineering and Mineral Exploration Geophysicists
                                                  1-22

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Materials  Control Conference  (titled Superfund from 1987 to 1990 and the National  Conference
on Management  of Uncontrolled  Hazardous Waste Sites prior to  1987) and National  Conference
on Hazardous Waste  and Hazardous Materials usually include a few papers related to
geophysical methods. Most of the papers in the conferences identified in Table 1-6 are indexed
in this reference guide.

        The American Society for Testing and Materials  (ASTM) has sponsored conferences that
present several papers on use of geophysical methods at contaminated sites (Collins and Johnson,
1988) and for geotechnical investigations (Paillet and Saunders, 1990). Subcommittee D-18.21
(Ground Water and Vadose Zone Investigations) of ASTM is preparing a number of standard
guides on the more commonly used geophysical methods (these are identified in the appropriate
subsections in U.S. EPA, 1993). Papers from Collins and Johnson (1988) and a number of
relevant papers from other ASTM publications are indexed in this guide.

       Table 1-5 provides additional information on three conferences sponsored by NWWA
from 1984 to 1986 on surface and borehole geophysical methods in ground-water investigations.
The  proceedings document of the 1967 Canadian Centennial Conference on Mining and
Groundwater Geophysics (Morley, 1970) remains an excellent general reference source on
ground-water  applications.

       1.4.3  Evaluation  of  Literature  References

       The field of geophysics in general and specific applications in ground-water and
contaminated site investigations is changing so rapidly that great care is required when evaluating
the literature, especially when dealing with a method that is outside one's area of expertise.
Several factors affect the weight that should be given conclusions or recommendations
concerning a particular method: (1) whether the it is from a peer-reviewed or non-peer reviewed
source;  (2) where the authors come from; and (3) how recently it has been published.

       Greatest weight should be given to the content of papers published in peer-reviewed
scientific journals such as  Geophysics, Ground Water, and Ground Water Monitoring Review.
Most conference proceedings  (ASTM  conferences being an exception) are not peer-reviewed,
                                            1-23

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 consequently there is more likely to be diversity of opinion concerning conclusions or
 recommendations in individual papers.  When non-peer-reviewed papers  are considered, greater
 weight can be given to those authored by individuals from academic institutions or research-
 oriented government agencies (e.g., U.S. Geological Survey, personnel from EPA research
 laboratories) than to papers authored by consultants who may have an interest in promoting a
 particular method. Finally, more recently published papers can generally  be given greater weight
 that earlier publications because they are more likely to address  recent developments and
 advances in geophysical techniques. As a general rule, review of multiple references from a
 variety of sources that deal with a specific  method should help determine the method's
 appropriateness for  a specific application or for site-specific conditions. When in doubt, one or
 more experts  should be consulted (see Section 1.5).

        1.4.4 Use of  Reference Index  Tables in  This  Guide

        This guide contains many more  references than are mentioned in  the text. They were
 initially compiled using: (1) the ground-water oriented bibliographies listed in Table 1-5; (2)
 conference proceedings listed in Table 1-6; (3) reference sections in papers gathered in the first-
 round review of references related specifically to geophysical applications to ground water and
 contaminated sites;  (4) recent issues (up to late 1992) of Geophysics, Geoexploration, Ground
Water, and Ground  Water  Monitoring  Review.

        All identified references that directly relate applications of geophysical methods  to the
 study of ground water and contaminated sites are included. References from the general
 geophysical exploration literature are limited to (1) texts related to basic theory, principles of
 operation of geophysical methods, and interpretation of data, and (2) papers reviewing the
 literature and state-of-the-art of specific geophysical methods that are used in the study  of
 ground water and contaminated sites.

        To facilitate  locating references on specific topics of interest, two types of reference
 tables are included  in this guide.  Descriptive reference  tables  (see, e.g., Tables 1-4 and 1-5)
provide information on the  contents of major references;  not all chapters have tables  of  this type.
 One or more reference index tables catalog references in each chapter by type of report  and
                                             1-24

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topics covered; these precede the reference section in each chapter (see, e.g., Table 1-7).
Although the organization of information varies somewhat from chapter to chapter, general
references on the method always appear first, followed by references describing applications of
the method.

       Specific applications are indexed separately so that the same reference may appear more
than once in the index. For example, in Table 1-7 the NWWA geophysics proceedings are listed
under the subheadings for both "contaminated sites" and "ground water" under the general
heading of texts/reports.  This same table lists 25 papers on general use of geophysical methods
in five subcategories (only a couple of these references were actually cited in the text).

       1.4.5 Obtaining References

       When out-of-print EPA documents and other government-sponsored publications  are
available from the National Technical Information Service (NTIS,  U.S. Department of
Commerce,  Springfield, VA 22161; 800-336-4700), the NTIS order number is provided with the
citation. When  an NTIS  number could not be found (usually for more recent publications), the
sponsoring EPA office or EPA laboratory is identified and availability can be determined  by
contacting the appropriate office/laboratory. U.S. Geological Survey libraries have computer
searchable library catalogs.

       EPA maintains a  microfiche catalog of publications in EPA libraries in Washington, DC,
and at Regional Offices and EPA laboratories.  Many of the publications cited in this reference
guide, including conference proceedings, are available in one or more of these libraries. Also,
these libraries maintain extensive microfiche collections of out-of-print EPA and other
documents that are available from NTIS.  If an EPA library is nearby, this may be fastest way to
review documents for which an NTIS number is known (see Appendix B.3 for addresses and
holdings).

       Tracking down references of interest in the conference series identified in the previous
section can be complicated. Proceedings for recent years, however, can usually be purchased
                                           1-25

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Table 1-7  Index to Texts and Papers on General Applications of Geophysics to the  Study of Ground
Water  and Contaminated Sites
Topic
 References
Texts/Reports
General Geophysics
Ground Water
Contaminated  Sites
Engineering
Beck (1981), d'Arnaud Gerkins (1989), Dobrin and Savit (1988), Eve and
Keys (1954), Garland (1989), Grant and West (1965), Griffith and King
(1981), Hansen et al. (1967), Heiland (1940,  1968), Howell (1959),
Jakosky (1950), Kearey and Brooks (1991), Milsom (1989), Nettleton
(1940), Parasnis (1975, 1979), Robinson and Coruh (1988), Sharma
(1986), Sheriff (1968, 1989, 1991), Telford et al. (1990), Valley (1965),
Van Blaricom (1980), Ward (1990a)

Erdelyi and Galfi (1988), Karous and Mares  (1988), Merely (1970),
NWWA (1984, 1985, 1986), Redwine et al. (1985), Rehm et al. (1985),
Taylor (1984), U.S. EPA (1987a), USGS (1980), Ward (1990b), Zohdy et
al.  (1974):  Bibliographies:  Handman (1983),  Johnson  and Gnaedinger
(1964), Lewis and Haeni (1987), Rehm et  al. (1985), van der Leeden
(1991)

Aller (1984),  Benson et al. (1984a,b), Cleff (1991—hydrocarbon
detection),  Costello (1980), EC&T et al. (1990), Frischknecht et al.
(1983), HRB Singer (1971), Lord and Koerner (1987), NWWA (1984,
1985, 1986),  O'Brien and Gere (1988), Olhoeft (1992a), Pitchford et al.
(1988), SEGEM (1988-present), Technos (1992), Thomas and Dixon
(1989), U.S. DOE  (1990), U.S. EPA (1987b, 1992), Van Eeckhout and
Calef (1992),  Wailer and Davis (1984),  Ward (1990b)

Paillet and  Saunders (1990), U.S. Army Corps of Engineers (1979),  SEG
(various dates), SEGEM (1988-present), Ward (1990c)
Signal  Detection               Hancock and Wintz (1966), Helstrom (1968)

Papers on General Use of Geophysical Methods
Ground Water (General)




Buried Wastes Detection


Contaminant Plumes
Dobecki and Romig (1985), Heiland (1937), Hoekstra and Blohm
(1988-fracture zones and karst), Meinzer (1937), National Water Well
Association (1971), Ogilvy (1970), Peterson et al. (1989),  Schwarz (1988),
Tucci (1989)

Benson (1991), Benson and Yuhr (1986), Benson et al. (1984), Johnson
and Johnson (1986), Lord et al. (1980), Neev (1988)

Applegate and Rodriguez (1988), Benson (1991), Benson and Yuhr
(1986), Benson et al.  (1984a,b), Evans and Schweitzer (1984)
                                           1-26

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                                         Table  1-7 (cont.)
Topic                         References
Papers on General Use of Geophysical Methods (cont.)
Monitoring                    Regan et al. (1987), Turtle and Chapman (1989), Wruble et al. (1986)

Site Assessment                Benson (1991), Benson and Yuhr (1992), Cichowicz et al. (1981), Evans
                              et al. (1982), Evans and Schweitzer (1984), Emilsson and Simonson
                              (1989), Flatman et al.  (1986), French et al. (1988), Hatheway  (1982),
                              Hoekstra and Hoekstra (1990), Johnson and Johnson (1986), MacLeod
                              and Dobush (1990), McGinnis et al. (1988), McKown and Sandness
                              (1981), Nelson (1988), Nichol and Cain (1992), Olhoeft (1992b), Olsson
                              et al. (1984), Turtle and Chapman (1989), Wruble et al. (1987)
                                            1-27

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from the originating organization (see Appendix B.2 for addresses): ASTM, NGWA/NWWA,
EEGS/SEMEG, SEG,  SPWLA.

       The NGWA's  National Ground-Water Information Center (6375 Riverside Drive, Dublin,
OH; 614-761-1711) is probably the only  library in the country with a complete set of the
NWWA/NGWA conference series. Similarly, the Hazardous Materials Research Institute (9300
Columbia Boulevard, Silver Spring, MD  20910-1702; 301-587-9390) maintains a complete
collection of its conference series. Copies of specific conference proceedings can often be found
in the libraries maintained by EPA regional office and EPA laboratories or in university libraries
(see Appendix B.3).

       Beginning in 1990, NWWA (now NGWA) began publishing the proceedings  of its various
conferences  under the title Ground Water  Management: A  Journal for Rapid Dissemination of
Ground Water Research. A subscription ($140 for members  and $192.50 for nonmembers)
consists of 6 coupons  that can be redeemed for published proceedings (larger proceedings may
require 2 coupons).
1.5 Where to Obtain Technical Assistance

       Technical assistance from EPA personnel is available at EPA's Environmental Monitoring
Systems Laboratory, Las Vegas, NV, and at EPA's Region V office. Appendix B.I provides the
names and phone numbers of individuals in EPA and at the U.S. Geological Survey who may be
able to provide advice on geophysical applications at contaminated sites.
                                           1-28

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1.6 References

See Glossary for meaning of method abbreviations.

Aller, L. 1984. Methods for Determining the Location of Abandoned Wells. EPA/600/2-83/123 (NTIS
        PB84-141530), 130 pp. Also published in NWWA/EPA series by National Water Well
        Association, Dublin, OH. [air photos, color/thermal IR, ER, EMI, GPR, MD, MAG, combustible
        gas detectors]

Applegate, J.K. and B.D. Rodriguez. 1988. Integrated Geophysical Mapping of Hazardous Plumes in
        Glacial Terrain. In: Proc. (1st) Symp. on the Application of Geophysics to Engineering and
        Environmental Problems, Soc. Eng. and Mineral  Exploration Geophysicists, Golden, CO, pp.  722-
        734.

Beck, A.E. 1981. Physical Principles of Exploration Methods. Macmillan, New York, 234 pp. [Reprinted
        in 1982 with corrections]. [ER, SP, IP, GR, MAG, EMI, VLF, SRR, SRL, radiometric, BH].

Benson, R.C.  1991. Remote Sensing and Geophysical Methods for Evaluation of Subsurface Conditions.
        In: Practical Handbook of Ground-Water Monitoring, D.M. Nielsen (ed.), Lewis Publishers,
        Chelsea, MI, pp. 143-194. [GPR, EMI, IDEM, ER, SRR, SRL, GR, MAG, MD, BH]

Benson, R.C.  and L.P. Yuhr. 1986. Geophysical Techniques for Sensing Buried Wastes and Waste
        Migration: An Update. In: Proc.  Seventh Nat. Conf. on Management of Uncontrolled Hazardous
        Waste Sites, Hazardous Materials Control Research Institute, Silver Spring, MD, pp. 465-466.
        [EMI, ER, GPR, GR, MAG, MD, SRL, SRR, BH]

Benson, R.C.  and L.P. Yuhr. 1992. A Summary of Methods for Locating and Mapping Fractures and
        Cavities with Emphasis on Geophysical Methods. In: SAGEEP '92, Society of Engineering and
        Mineral Exploration Geophysicists, Golden, CO, pp. 471-486.

Benson, R. C., R.A. Glaccum, and M.R. Noel.  1984a. Geophysical Techniques for Sensing Buried Wastes
        and Waste Migration.  EPA  600/7-84/064 (NTIS  PB84-198449), 236 pp. Also published in 1982 in
       NWWA/EPA series by National Water Well Association, Dublin, OH.  [EMI,  ER, GPR, MAG,
        MD, SRR]

Benson, R. C., R.A. Glaccum, and M.R. Noel.  1984b. Geophysical Techniques for Sensing Buried Wastes
        and Waste Migration: An Applications Review.  In: NWWA/EPA Conf. on Surface and Borehole
        Geophysical Methods in Ground Water Investigations (1st, San Antonio TX),  National Water
       Well Association, Dublin, OH, pp. 533-566. [EMI, ER, GPR, MAG, MD, SRR, SRL]

Breusee, J.J. 1963. Modern Geophysical  Methods for Subsurface Water Exploration.  Geophysics
       28(4):633-657. [ER]

Cichowicz N.L., R.W. Pease, Jr., P.J. Stellar, and H.J. Jaffe. 1981. Use of Remote Sensing Techniques in
        a Systematic Investigation of an Uncontrolled Hazardous Waste  Site. EPA/600/2-81/187  (NTIS
       PB82-103896). [ER, SRR, GPR,  MD]

Cleff, R. (ed.). 1991. An Evaluation of Soil Gas and Geophysical Techniques for Detection of
       Hydrocarbons. API Publication No. 4509, American Petroleum Institute, Washington, DC. [GPR,
       EMI,  ER, complex resistivity]
                                             1-29

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Collins, A.G. and A.I. Johnson (eds.). 1988. Ground-Water Contamination: Field Methods. ASTM STP
        963, American Society for Testing and Materials, Philadelphia, PA, 485 pp. [Includes 5 papers on
        geophysical methods]

Costello, R.L. 1980. Identification and Description of Geophysical Techniques. USATHAMA Report
        DRXTH-TE-CR-80084.  U.S. Army Toxic and Hazardous  Materials Agency, Aberdeen Proving
        Ground, MD, 215 pp. [ER, GPR, SRR, BH] [Superseded by EC&T et al., 1990]

d'Arnaud Gerkins, J.C. 1989. Foundations of Exploration Geophysics. Elsevier, NY, 667 pp. [SRR, SRL,
        GR, MAG, SP, TC, MT, IP, ER, EMI, TDEM, radiation]

Dobecki, T.L. and P.R. Romig. 1985.  Geotechnical and Ground Water Geophysics. Geophysics
        50(12):2621-2636.

Dobrin, M.B. and C.H. Savit. 1988. Introduction to Geophysical  Prospecting, 4th ed. McGraw-Hill, New
        York, 867 pp. [Earlier editions by Dobrin: 1960,  1965, 1976]. [SRR, SRL, CSP, GR, MAG, ER,
        SP, IP, EM I]

Ellyett,  C.D. and D.A. Pratt. 1975. A Review of the Potential Applications of Remote Sensing
        Techniques to Hydrogeological Studies in Australia. Australian Water Resources Council
        Technical Paper No. 13, Canberra.

Emilsson, G.R.  and J.C.B. Simonson. 1989.  Integrated Geophysical and Geologic Techniques: Important
        First Steps in the Investigation of a Superfund Site in Southeastern Pennsylvania. In: Proc. (2nd)
        Symp. on the Application of Geophysics to Engineering and Environmental Problems, Soc. Eng.
        and Mineral Exploration Geophysicists, Golden, CO, pp. 354-367.

Environmental Consulting & Technology (EC&T), Inc., Technos,  Inc., and UXB International, Inc. 1990.
        Construction Site Environmental Survey and Clearance Procedures Manual. U.S. Army Toxic and
        Hazardous Materials Agency, Aberdeen Proving Ground, MD. [GPR, EM I, MAG, MD, soil gas]

Erdelyi, M. and J. Galfi. 1988. Surface and Subsurface Mapping in Hydrogeology. Wiley-Interscience,
        New York, 384 pp. [Chapter 5  covers remote sensing, and Chapter 6 geophysical methods: GPR,
        ER, IP, EMI, SRR, SRL, GR,  MAG, geothermal]

Evans, R. B., R.C. Benson, and  J. Rizzo. 1982. Systematic Hazardous Site Assessments. In: Proc. (3rd)
        Nat. Conf. on Management of Uncontrolled Hazardous Waste Sites, Hazardous Materials Control
        Research Institute, Silver Spring, MD, pp. 17-22. [EMI, ER, GPR, MAG, MD, SRR]

Evans, R.B. and G.E. Schweitzer. 1984. Assessing Hazardous Waste Problems. Environ. Sci. Technol.
        18(11):330A-339A. [EMI, ER, GPR, MAG, MD, SRR]

Eve, A.S. and D.A. Keys. 1954. Applied Geophysics in the  Search for Minerals, 4th ed. Cambridge
        University Press, New York, 382 pp. [earlier editions 1929, 1931, 1938]. [MAG, ER, EM, GR,
        SRL,  geothermal, radiometric]

Flatman, G. T.,  E.J. Englund, and D.D. Weber.  1986. Educational Needs for Hazardous Waste Site
        Investigations: Technology Transfer in Geophysics and Geostatistics. In: Proc. 7th Nat. Conf. on
        Management of Uncontrolled Hazardous Waste Sites, Hazardous Materials Control Research
        Institute, Silver Spring, MD, pp. 217-219.
                                             1-30

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French, R. B., T.R. Williams, and A.R. Foster. 1988. Geophysical Surveys at a Superfund Site, Waste
       Processing, Washington.  In: Proc. (1st) Symp. on the Application of Geophysics to Engineering
       and Environmental Problems, Soc. Eng. and Mineral Exploration Geophysicists, Golden, CO, pp.
       747-753.

Frischknecht, F. C., L. Muth, R. Grette, T. Buckley, and B. Kornegay. 1983. Geophysical Methods for
       Locating Abandoned Wells. U.S. Geological Survey Open-File Report 83-702, 211 pp.

Garland, G.D. (ed.).  1989. Proceedings of Exploration 87.  Special Volume 3, Ontario Geological Survey,
       Toronto, Canada, 914 pp. [77 papers covering surface, borehole, and airborne EM, IP, remote
       sensing, radiometric, and seismic methods]

Grant,  F.S. and G.F. West. 1965. Interpretation Theory in Applied Geophysics. McGraw-Hill, New
       York, 583 pp. [ER, EM, SRL, SRR, GR, MAG, EMI]

Griffiths, D.H. and R.F. King. 1981. Applied Geophysics for Engineers and Geologists: The Elements of
       Geophysical Prospecting, 2nd ed. Pergamon Press, New York, 230 pp. [First edition 1965] [ER,
       EM, SRR, SRL, GR, MAG]

Hancock, J.C. and P.A. Wintz. 1966. Signal Detection Theory. McGraw-Hill, New York, 247 pp.

Handman, E.H.  1983. Hydrologic and Geologic Aspects of Waste Management and Disposal: A
       Bibliography of Publications by U.S. Geological Survey Authors. U.S. Geological Survey Circular
       907, 40  pp. [15 references on geophysics]

Hansen, D.A., W.E. Heinrichs, Jr., R.C. Holmer, R.E. McDougall, G.R. Rogers, J.S. Sumner, and S.H.
       Ward (eds.). 1967. Mining  Geophysics, Vol. II, Theory. Society of Exploration Geophysicists,
       Tulsa, OK, 708 pp. [EMI, ER, IP, MAG, GR]

Hatheway, A.W. 1982. Geological and Geophysical Techniques for Development of Siting and Design
       Parameters. In: Proc. Symp. on Low-Level Waste Disposal (Arlington, VA), M.G. Yalcintas
       (ed.), NUREG/CP-O028 Vol. 2, Oak Ridge National Laboratory, Oak Ridge, TN, pp. 33-50.

Heiland, C.A. 1937.  Prospecting for Water with Geophysical Methods. Trans. Am. Geophys. Union
       18:574-588. [ER ,EMI, GR, MAG, S, geothermal]

Heiland, C.A. 1940.  Geophysical Exploration. Prentice-Hall, New York, 1013 pp. [Reprinted under the
       same title in 1968 by Hafner Publishing, New York] [S, ER, MAG, GR]

Helmstrom, C.W. 1968. Statistical Theory of Signal Detection. Pergamon Press, New York, 470 pp.

Hoekstra, P.  and M. Blohm.  1988. Surface Geophysics for Mapping Faults, Shear Zones and
       Karstification. In: Proc. (1st) Symp.  on the Application of Geophysics to Engineering and
       Environmental Problems, Soc. Eng. and Mineral Exploration Geophysicists, Golden, CO, pp. 598-
       620.

Hoekstra, B. and P. Hoekstra. 1990. Planning and Executing Geophysical Surveys. In:  Proc. Fourth Nat.
       Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
       Methods. Ground Water Management 2:1159-1166. [EMI, ER, GPR, GR, MAG,  SRR, SRL]

Howell, B.F. 1959. Introduction to  Geophysics. McGraw-Hill, New York, 399 pp. [S, GR, MAG,
       thermal]


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HRB-Singer, Inc. 1971. Detection of Abandoned Underground Coal Mines by Geophysical Methods.
        Project 14010, Report EHN. Prepared for U.S. EPA and PA Dept. of Env. Res. [VLF, IP, SP].

Jakosky, J.J. 1950. Exploration Geophysics.  Trija Publishing Co., Los Angeles, 1195 pp. [S, ER, MAG,
        GR]

Johnson, A.I. and J.P. Gnaedinger.  1964. Bibliography. In: Symposium on Soil Exploration, ASTM STP
        351, American Society for Testing and Materials, Philadelphia, PA pp. 137-155. [air photo
        interpretation (90 refs); ER and seismic (60 refs); electrical borehole logging (48 refs); nuclear
        borehole logging (40 refs), borehole camera (13 refs); neutron moisture measurement (50 refs)]

Johnson, W.J.  and D.W. Johnson. 1986. Pitfalls of Geophysics in Characterizing Underground Hazardous
        Waste. In: Proc. 7th Nat. Conf. on Management of Uncontrolled Hazardous Waste  Sites,
        Hazardous Materials  Control Research Institute, Silver Spring, MD, pp. 227-232. [EMI, ER, GPR,
        MAG, SRR]

Karous, M. and S. Mares. 1988. Geophysical Methods in Studying Fracture Aquifers. Charles University,
        Prague, 93 pp. [ER, EMI, SP,  SRR, borehole]

Kearey, P. and M. Brooks. 1991. An Introduction to Geophysical Exploration, 2nd ed. Blackwell
        Scientific Publications, Boston, MA 296 pp. [First edition 1984]  [SRR, SRL, GR, MAG, ER, SP,
        IP, EMI, VLF, AFMAG, TC, MT, AEM]

Lewis, M.R. and P.P. Haeni.  1987. The Use of Surface Geophysical Techniques to Detect Fractures in
        Bedrock—An Annotated Bibliography. U.S.  Geological Survey Circular 987. [31 English language
        and  12 foreign language references]

Lord Jr., A.E.  and R.M. Koerner.  1987. Nondestructive Testing  (NOT) Techniques to Detect Contained
        Subsurface Hazardous Waste. EPA/600/2-87/078 (NTIS PB88-102405), 99 pp.  [17 methods;  EM I,
        GPR, MAG, MD best]

Lord, Jr., A.E, S. Tyagi, and R.M. Koerner.  1980. Non-Destructive Testing (NOT) Methods Applied to
        Environmental Problems Involving Hazardous Material Spills. In: Proc. Nat. Conf. on Control of
        Hazardous Materials Spills (Louisville, KY), Vanderbilt University, Nashville, TN, pp. 174-179. [17
        methods]

MacLeod, I.N. and T.M. Dobush.  1990. Geophysics-More  Than Numbers: Processing and Presentation
        of Geophysical Data. In: Proc. Fourth Nat.  Outdoor Action Conf. on Aquifer Restoration,
        Ground Water Monitoring and Geophysical  Methods. Ground Water Management 2:1081-1095.

McGinnis, L.D., R.C. Winter, S.F. Miller and C. Tome. 1988. Decision Making on Geophysical
        Techniques and Results  of a Study at a Hazardous Waste Site. In: Proc. (1st) Symp. on the
        Application of Geophysics to Engineering and Environmental Problems, Soc. Eng. and Mineral
        Exploration Geophysicists, Golden, CO,  pp.  691-712.

McKown, G.L. and G.A. Sandness, 1981. Computer-Enhanced Geophysical Survey Techniques for
        Exploration of Hazardous Wastes Sites.  In:  Proc. (2nd) Nat. Conf. on Management of
        Uncontrolled Hazardous Waste Sites, Hazardous Materials Control Research Institute,  Silver
        Spring, MD, pp. 300-305.

Meinzer, O.E.  1937. The Value of Geophysical Methods in Ground Water Studies. Trans. Am. Geophys.
        Union  18:385-387.
                                             1-32

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Milsom, J. 1989. Field Geophysics. Halsted Press, New York, 182 pp.

Merely, L.W. (ed.) 1970. Mining and Groundwater Geophysics/1967. Economic Geology Report 26.
        Geological Survey of Canada, Ottawa, Canada. [ER, EM, SRR, BH]

Nabighian, M.N. (ed.). 1988. Electromagnetic Methods in Applied Geophysics, Vol. 1, Theory. Society
        of Exploration Geophysicists, Tulsa, OK 528 pp.

Nabighian, M.N. (ed.). 1991. Electromagnetic Methods in Applied Geophysics, Vol. 2, Parts A and B,
        Applications. Society of Exploration Geophysicists, Tulsa, OK, Part A, pp. 1-520, Part B, pp. 521-
        992.

National Water Well Association (NWWA). 1971. Geophysics and Ground Water: A Primer: Part 1, An
        Introduction to Ground Water Geophysics; Part 2, Applied Use of Geophysics. Water Well
        Journal Part 1:25(7):43-60; Part 2: 25(8):35-50.

National Water Well Association (NWWA). 1984. NWWA/EPA Conference on Surface and Borehole
        Geophysical Methods in Ground Water Investigations (San Antonio, TX). National Water Well
        Association, Dublin,  OH.

National Water Well Association (NWWA). 1985. NWWA  Conference on Surface and Borehole
        Geophysical Methods in Ground Water Investigations (Fort Worth, TX). National Water Well
        Association, Dublin,  OH.

National Water Well Association (NWWA). 1986. Surface and Borehole Geophysical Methods and
        Ground Water Instrumentation Conference and Exposition (Denver,  CO). NWWA, Dublin, OH.

Neev, D. 1988.  Application of Geophysical Methods for Subsurface Metal Screening A Case History.
        In: Proc. (1st) Symp. on the Application of Geophysics to Engineering and Environmental
        Problems, Soc. Eng. and Mineral Exploration Geophysicists, Golden, CO, pp. 713-721.

Nelson, J.S. 1988. Planning and Costing Geophysical Investigations for Engineering and Environmental
        Problems. In: Proc. (1st) Symp. on the Application of Geophysics to  Engineering and
        Environmental Problems, Soc. Eng.  and  Mineral Exploration Geophysicists, Golden, CO, pp. 569-
        572.

Nettleton,  L.L. 1940. Geophysical Prospecting for Oil. McGraw-Hill, New York, 444 pp. [GR, MAG,
        SRR, SRL, ER]

Nicholl, Jr., J.J. and K. Cain. 1992. Subsurface Characterization Using Integrated Geophysical Methods:
       A  Case History. In: SAGEEP '92, Society of Engineering and Mineral Exploration Geophysicists,
        Golden, CO, pp. 37-54.

O'Brien & Gere Engineering. 1988. Hazardous Waste Site Remediation: The Engineering Perspective.
       Van Nostrand  Reinholdj New York. [SRR, SRL, ER, EM, GPR, MAG]

Ogilvy, A.A. 1970. Geophysical Prospecting for Ground Water in the Soviet Union. In: Mining and
        Groundwater Geophysics/1967, L.W. Merely (ed.),  Geological Survey  of Canada Economic
        Geology Report 26, pp. 536-543.
                                             1-33

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Olhoeft, G.R. 1992a. Geophysics Advisor Expert System, Version 2.0. U.S. Geological Survey Open File
        Report 92-526, 21 pp. plus floppy disk. Also available from U.S. EPA Environmental Monitoring
        Systems Laboratory, PO Box 93478, Las Vegas, NV, 89193-3478; replaces Version LO (EPA/600/4-
        89/023), released in 1989. [ER, EMI, complex resistivity, SRR, SRL, GPR, GR, radiometric, soil
        gas]

Olhoeft, G.R. 1992b. Site Characterization Tools. In: Subsurface Restoration Conference, Third Int.
        Conf. on Ground Water Quality Research (June 21-24, 1992, Dallas, TX), National Center for
        Ground Water Research, Rice University, Houston, TX, pp. 29-31.

Olsson, O., 0. Duran, A. Jamtlid, and L. Stenburg. 1984. Geophysical Investigations in Sweden for the
        Characterization of a Site for  Radioactive Waste  Disposal—An Overview. Geoexploration 22:187-
        201.

Paillet, F.L. and W.R. Saunders (eds.). 1990. Geophysical Applications for Geotechnical Investigations.
        ASTM STP 1101, American Society for Testing and Materials, Philadelphia, PA 118 pp. [2 peer-
        reviewed papers on surface and 5  on borehole geophysics]

Pamsnis, D.S. 1975. Mining Geophysics,  2nd ed, revised and updated. Elsevier, New York, 395 pp.
        [second edition dated  1973]; [MAG, SP, EMI, TDEM, TC, ER, IP, GR, SRR, SRL, radiometric,
        BH]

Parasnis, D.S. 1979. Principles of Applied Geophysics, 3rd ed. Chapman and Hall, New York, 269+ pp.
        [earlier editions dated 1962, 1972]; [MAG, GR, ER, IP, EM, S]

Peterson, R., J. Hild, and P. Hoekstra. 1989. Geophysical Studies for the Exploration of Groundwater in
        the Basin  and Range of Northern Nevada. In: Proc. (2nd) Symp. on the Application of
        Geophysics to Engineering and Environmental Problems, Soc. Eng. and Mineral Exploration
        Geophysicists, Golden, CO, pp. 425-435.

Phillipson, W.R. and D.A. Sangrey. 1977. Aerial Detection Techniques for Landfill Pollutants. In: Proc.
        3rd Solid Waste Research Symp. (Management of Gas Leachate from Landfills), EPA/600/9-
        77/026 (PB272 595), pp. 104-114.

Pitchford, A. M., A.T. Mazzella, and K.R.  Scarborough. 1988.  Soil-Gas and Geophysical Techniques for
        Detection  of Subsurface Organic Contamination. EPA/600/4-88/019 (NTIS PB88-208194). [EMI,
        ER, complex resistivity, GPR, SRR, SRL, MAG, MD, AEM, radiometric]

Redwine, J. et al.  1985. Groundwater Manual for the Electric Utility Industry, Volume 3: Groundwater
        Investigations and Mitigation  Techniques. EPRI CS-3901. Electric Power Research Institute,
        Palo Alto, CA Chapter 3. [SRR, SRL, CSP, sonar, ER, SP, EMI, GPR, GR, BH]

Regan, J. M., M.S. Robinette, and  T.R. Beaulieu. 1987. The Use of Remote Sensing, Geophysical, and
        Soil Gas Techniques to Locate Monitoring Wells at Hazardous Waste Sites in New Hampshire.
        In:  Proc. of the Fourth Annual Eastern Regional Ground Water Conference (Burlington, VT),
       National Water  Well Association, Dublin, OH, pp. 577-591. [EMI, ER, GR, MAG, SRR, fracture
       trace]

Rehm, B.W., T.R.  Stolzenburg, and D.G. Nichols. 1985. Field Measurement Methods for Hydrogeologic
        Investigations: A Critical  Review of the Literature. EPRI EA-4301 Electric Power Research
       Institute, Palo Alto, CA. [Major methods: ER, EMI, SRR, BH; Other: IR,  SP, IP/complex
       resistivity, SRR, GPR, MAG, GR, thermal]
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Robinson, E.S. and C. Coruh. 1988. Basic Exploration Geophysics.  John Wiley & Sons, New York, 562
        pp. [SRR, SRL, GR, MAG, ER, IP, SP, TC, EMI, BH]

Schwarz, S.D. 1988. Application of Geophysical Methods to Groundwater Exploration in the Tolt River
        Basin, Washington State. In: Proc. (1st) Symp. on the Application of Geophysics to Engineering
        and Environmental Problems, Soc. Eng. and Mineral Exploration Geophysicists, Golden, CO, pp.
        652-657.

Sharma, P.V. 1986. Geophysical Methods in Geology, 2nd ed Elsevier, New York, 428  pp. [First edition
        1976] [S, GR, MAG, ER, geothermal]

Sheriff, R.E.  1968. Glossary of Terms Used in Geophysical Exploration. Geophysics 33(1): 181-228.

Sheriff, RE.  1989. Geophysical Methods. Prentice Hall, Englewood Cliffs, NJ, 605 pp.  [GR, MAG, ER,
        EM, SRR, geothermal, radiometric, BH]

Sheriff, R.E.  1991. Encyclopedic Dictionary of Exploration Geophysics, 3rd ed. Society  of Exploration
        Geophysicists, Tulsa, OK, 376 pp. [1st ed. 1973, 2nd 1984]

Society  of Exploration Geophysicists  (SEG). Various dates. Annual Meeting Technical Program:
        Expanded Abstracts  and Biographies.  SEG, Tulsa, OK.  [Publication for the 61st annual meeting
        in 1991 is a 2-volume set totaling 1707 pages]*

Society  of Engineering and Mineral Exploration Geophysicists/Environmental and  Engineering
        Geophysical Society  (SEMEG/EEGS).  1988-present.  Symposium on the Application of
        Geophysics to Engineering and Environmental Problems [1st, 1988; 2nd 1989; 3rd, 1990; 4th,
        1991; 5th, 1992].  EEGS, Englewood CO.*

Taylor, R.W.  1984. Evaluation of Geophysical Surface  Methods for Measuring Hydrological Variables in
        Fracture Rock Units. U.S. Bureau of Mine OFR-17-84 (NTIS PB84-158021), 145 pp.

Technos, Inc. 1992. Application Guide  to the Surface Geophysical  Methods. Technos, Inc., Miami, FL,
        19 pp. [GPR, EMI, TDEM, VLF resistivity, ER, SRR, SRL, MAG, MD, GR, thermal, radiation)

Telford, W. M. N., L.P. Geldart, RE. Sheriff, and D.A. Keys. 1990. Applied Geophysics, 2nd ed.
        Cambridge University Press, New York, 770 pp. [1st ed. 1976, reprinted 1982] [GR, MAG, SRR,
        SRL, ER, IP, SP, MT, EMI, TDEM, AEM, radioactive, BH]

Thomas, M.D. and D.F. Dixon (eds.). 1989. Proceedings of a Workshop on  Geophysical and Related
        Geoscientific Research at Chalk River, Ontario. AECL-9085, Atomic Energy of Canada Limited.
        [25 papers on  surface (GR, S, MAG, EM, ER,  GPR) and borehole methods (electric, television,
        acoustic televiewer, spectral gamma)]

Tucci, P. 1989. Geophysical Methods for Water Resource  Investigations in South and Central Arizona.
        In: Proc. (2nd) Symp. on the Application of Geophysics to Engineering and Environmental
        Problems, Soc. Eng.  and Mineral Exploration Geophysicists,  Golden,  CO, pp. 368-383.

Turtle, J.C. and G.H. Chapman.  1989. Field Analytical Screening, Reconnaissance Geophysical and
        Temporary Monitoring Well Techniques—An Integrated Approach to Pre-Remedial Site
        Characterization. In: Proc. 6th Nat. Conf. on Hazardous Wastes and Hazardous Materials,
       Hazardous Materials Control Research Institute, Silver Spring, MD, pp. 530-537.  [EMI, ER, GPR,
       MAG, SRR, BH]


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U.S. Army Corps of Engineers. 1979. Geophysical Exploration.  Engineer Manual EM 1110-1-1802,
        Department of the Army, Washington, DC, 313 pp. [SRR, SRL, SASW, sonar, ER, GR, BH]

U.S. Department of Energy (DOE).  1990. Basic Research for Environmental Restoration.  DOE/ER-
        0482T, Washington DC, 156 pp. [Discusses need for geophysics]

U.S. Environmental Protection Agency (EPA). 1987a. Surface Geophysical Techniques for Aquifer and
        Wellhead  Protection Area Delineation. EPA/440/6-87/016 (NTIS  PB88-229505).

U.S. Environmental Protection Agency (EPA). 1987b. A Compendium of Superfund Field Operations
        Methods, Part 2. EPA/540/P-87/001 (OSWER Directive 9355.0-14) (NTIS PB88-181557), 644 pp.
        [Remote sensing, EMI, ER, SRR, SRL, MAG, GPR, BH]

U.S. Environmental Protection Agency (EPA). 1992. Dense Nonaqueous Phase Liquids-A Workshop
        Summary, Dallas, Texas, April 16-18, 1991. EPA/600/R-92/030, 81 pp. [Section 4.2 provides brief
        description of geophysical techniques]

U.S. Environmental Protection Agency (EPA). 1993.  Subsurface Field Characterization and Monitoring
        Techniques A Desk Reference Guide, Volume I: Solids and Ground Water. EPA/625/R-93/O03a.
        Available from EPA Center for Environmental Research Information, Cincinnati, OH. [Section 1
        covers remote sensing  and surface geophysical methods, Section 3 covers borehole geophysical
        methods]

U.S. Geological Survey (USGS).  1980. Geophysical Measurements. In: National Handbook of
        Recommended Methods for Water Data Acquisition, Chapter 2 (Ground Water), Office of Water
        Data Coordination, Reston, VA pp. 2-24 to 2-76. [TC, MT, AMT, EMI, ER, IP, SRR, GR, BH]

Valley,  S.C. (ed.). 1965. Handbook of Geophysics and Space Environments. McGraw-Hill, New York.

Van Blaricom, R. 1980. Practical Geophysics for the  Exploration Geologist. Northwest Mining
        Association, Spokane, WA 303 pp.

van der  Leeden, F. 1991.  Geraghty & Miller's Groundwater Bibliography, 4th ed. Water Information
        Center, Plainview, NY, 507 pp.

Van Eeckhout, E. and C. Calef (compilers). 1992. Workshop on Noninvasive Geophysical Site
        Characterization. LA-12311-C, Los Alamos National Laboratories, Los Alamos, NM, 33  pp.

Wailer,  M.J. and J.L. Davis. 1984. Assessment of Innovative Techniques to Detect Waste Impoundment
        Liner Failure. EPA/600/2-84/041 (NTIS PB84-157858), 148 pp. [28 methods assessed including
        ER, SRR, acoustic emission monitoring]

Ward S.H.  (ed.) 1990a. Geotechnical  and Environmental Geophysics Vol. I Review and Tutorial,
        Society of Exploration Geophysicists, Tulsa, OK, 397 pp.

Ward S.H.  (ed) 1990b.  Geotechnical and Environmental Geophysics:  Vol. II Environmental and
        Groundwater. Society  of Exploration Geophysicists, Tulsa, OK, 309 pp. [34 papers, 13 on ER &
        EM; 14 on multiple methods; thermal, others]

Ward S.H.  (ed.) 1990c. Geotechnical  and Environmental Geophysics:  Vol. Ill Geotechnical. Society of
        Exploration Geophysicists, Tulsa, OK, 352 pp. [23 papers, including cross-borehole resistivity,
        seismic shear, radio imaging]
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Wruble, D.T., J.J. Van Ee, and L.G. McMillion. 1986. Remote Sensing Methods for Waste Site
        Subsurface Investigations and Monitoring. In: Hazardous and Industrial Solid Waste Testing and
        Disposal: Sixth Volume, R.A. Conway, et al. (eds.), ASTM STP 933, American Society for Testing
        and Materials, Philadelphia, PA pp. 243-256. [Airphotos, multispectral, thermal IR, surface
        geophysics]

Zohdy, A.A., G.P. Eaton, and D.R. Mabey.  1974. Application of Surface Geophysics to Ground-Water
        Investigations. U.S. Geological Survey Techniques of Water-Resource Investigations TWRI 2-D1,
        116 pp. [ER, GR, MAG, SRR]

* Addresses in Appendix B.2.
                                              1-37

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                                       CHAPTER!
                   AIRBORNE REMOTE SENSING AND GEOPHYSICS
       Hydrogeologists have used the term remote sensing loosely to apply to all airborne
sensing methods (Ellyett and Pratt, 1975). Exploration geophysicists usually use the term
airborne geophysics to refer to magnetic, gravimetric, and electromagnetic measurements taken
from ecmventional aircraft and they restrict the term remote sensing to observations of
electromagnetic radiation  from satellites and high-altitude aircraft (Regan, 1980).'Figure 2-1
shows the portion of the electromagnetic spectrum that is most commonly used for remote
sensing.

       Airborne sensing and methods  are more commonly used in regional investigations where
large areas must be evaluated, rather than for site-specific studies. Table 2-1  summarizes
information on hydrogeologic applications for five airborne sensing techniques that were
evaluated by Ellyett and Pratt (1975) for their potential value in hydrogeological investigations.
A sixth method photographic ultraviolet, which can be used to map oil spills on surface water is
also included in this table. Table 1-1 provides additional summary information of airborne
remote sensing and geophysical methods with a focus on applications at contaminated sites.

       Photographic methods have the widest applicability to site-specific investigations of
contaminated sites as  discussed in Section 2.1. Airborne geophysical methods other than the
thermal infrared method have received relatively  limited use in hydrogeologic  studies, as
discussed in Section 2.2.
    Various types of satellite remote sensing imagery equipment are available for most areas of the
United States. Typically, however, the scale of the images yielded with this technology is too large
to provide much useful information for site-specific investigations. Still, such information may be
of value for investigation of particularly large sites.   Chapter 11 of U.S. EPA (1986) provides
information on how to obtain such images.
                                           2-1

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                         Black Body at 5800°K

                             Sun's Energy
                                                                          Black Body Radiation Curves and Sun's Radiation
                                     BJackBodyat1200°K
                                             Black Body at 600°K
                                                     Black Body at 300°K
                               2.0    4.0   6.0   10
20    40   60    100   200 .5mm  1mm    1cm    1m   10m  100m
                                                                                                     Blocking Effect
                                                                                                          of Earth's
                                                                                                       Athmosphere
                                                      Spectral Range of Operation for Common Remote Sensing Instruments

                               Human Eye                                                -o  Radar -o TJ -o
                                                                                         c        c c c
                                       Thermal Scanners, .                                 9        m m ™
                          Multi-Spectral Scanners
                                                                                           Passive Microwave
               .4   .6  .8 1.0     2.0     4.0   6.0   10     20    40   60   100   200  .5mm 1mm    1cm    1m    10m 100m
                                          Wavelenghth in Microns (Not to Scale)
Figure 2-1     Portions of the electromagnetic spectrum used for remote sensing  (Scherz and Stevens, 1970).
                                                  2-2

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Table 2-1 Use  of Airborne  Sensing  Techniques in Hydrogeologic and Contaminated Site  Studies
Method
Description
Applications
Visible and near
infrared
Photographic
ultraviolet"
Thermal infrared
Side-looking
airborne radar
(SLAR)
Low frequency
airborne
electromagnetic
methods (AEM)
Aeromagnetic
Aerial photographs (black and white,
color, false color, infrared multi-
spectral). Imaging limited to surface
features.

Aerial  photographs  using  special
film and filters for  sensing reflected
ultraviolet  radiation.

Scanners used to detect infrared
radiation beyond the range of
infrared  photography.
Creates a continuous radar image
(reflected radio frequency pulses) of
the ground surface.
Uses a low frequency
electromagnetic  wave transmitter
and receiver that responds to
changes in the ground electrical
conductivity.

Measures the earth's total magnetic
field.
Air photo interpretation of geologic and
surface hydrologic features, fracture
trace analysis, soil moisture patterns, and
vegetation (infrared).

Mapping of oil spills on surface water
bodies sometimes used for geologic
mapping of carbonate formations.

Routinely used to detect ground-water
discharge into rivers, lakes, and the sea;
detects  variations in soil moisture
content (seepage from leach fields and
underground storage tanks), evaporation,
and thermal properties.

Similar applications to air photos; can
distinguish grain size in alluvium if there
is no interference from vegetation. Can
also be used for fixture trace analysis.

Detects variations in soil and reek types;
variations in ground-water salinity;
location  of shallow subsurface aquifers
and deeper brine contaminated aquifers.
Primarily used in petroleum and mineral
exploration to assist with geological
mapping and structural interpretations.
Also used to locate abandoned wells
with metallic easings.
* Not mentioned in Ellyett and Pratt (1975).

Source Adapted from Ellyett and Pratt (1975).
                                            2-3

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2.1 Visible  and Near-Infrared Aerial Photography

       Aerial photographs, which record the visible portion of the electromagnetic spectrum, are
by far the most common form of remote sensing and are basic to any geologic or hydrogeologic
investigation. Much information can be obtained from stereopairs of black-and-white (also called
panchromatic) air photos, which provide a three-dimensional image of the surface when viewed
with a stereoscope.   Patterns of vegetation, variations in grey tones in soil and rock drainage
patterns, and linear features allow preliminary interpretations of geology, soils, and hydrogeology.
Various standard texts are available for guidance in air photo interpretation methods (Avery,
1968;  Denny et al,  1968; Lueder, 1959 Ray, 1960). All air photo interpretations should be field
checked and revised where "ground truthing" indicates features that were missed or incorrectly
delineated.

       Using photogrammetric techniques to develop topographic contours from stereoscopic
(overlapping) aerial photographs is often the cheapest way to produce reasonably accurate
topographic maps (1  or 2 foot contour intervals) for site-specific investigations. However, such
maps may not be sufficiently accurate for locating the elevations of boreholes and monitoring
wells for water level measurement and subsurface mapping.

       Black-and-white  air photos are available from various federal agencies  for  almost any
location in  the United States  and are  the cheapest type of air photo to obtain.  Black-and-white
photographs  most  frequently  are  reported as  being  useful  in ground-water  contamination studies.
Other types  of images that can be obtained, usually  at greater expense,  include:

       w      True color records all colors  in the visible spectrum  as they appear to the naked
              eye.
       •      Color infrared film records yellows and reds as green and the near infrared (not
              visible to the eye) as  red. Since vegetation reflects near-infrared radiation, this
              image is especially useful for observing vegetation patterns. Other types of images
              that record or display colors  differently than they are perceived by the eye (called
              false color) can be created in a similar fashion.
       •      Photographic  ultraviolet uses special film and filters to  record UV energy. Oil
              and carbonate minerals are fluorescent in UV bands when  photostimulated by
              sunlight. A disadvantage  of UV photography is that UV wavelengths are
                                            2-4

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               scattered in the atmosphere and result in a low contrast image, especially when
               dust or haze is present.
               Multiband (also called multispectral)  images, use multiple lenses and filters to
               record simultaneous exposures of different portions of the visible and near-
               infrared spectrum of the same area on the ground. Images can also be recorded
               electronically using a multispectral scanning  system.
       Air photos often reveal linear features called fracture traces that indicate zones of
relatively higher permeability in the subsurface.  Fracture-trace analysis using air photos can
provide preliminary information on possible  preferential movement of contaminants. Fetter
(1980, pp. 406-411) provides a useful introduction to fracture-trace analysis. Sonderegger  (1970)
describes use of panchromatic, color, and infrared photography to locate fracture traces as an aid
to the interpretation of the occurrence and movement of ground water in limestone terraine.
Parizek (1976) provides a thorough review of the North American literature on fracture-trace
and lineament analysis. DiNitto (1983) recommends that air photo fracture-trace analysis be
supplemented, if possible, by surface analysis of bedrock fracture orientations.

       Aerial photography can also be a valuable tool in documenting pre-existing physical
conditions and monitoring the progress of cleanup operations at hazardous  waste sites
(Finkbeiner and O'Toole, 1985). Color infrared photography is particularly useful where
contamination results in vegetation changes, such as in cases involving a failed septic tank
absorption system (Farrell, 1985), fertilizers, or oil pollution and natural gas leaks (Svoma and
Pysek, 1985). A bibliography compiled by Rehm et al. (1985) lists 30 references on thermal  and
color infrared remote sensing. Table 2-2 lists 18 references on use of aerial photography at
contaminated sites.
2.2 Other Airborne Remote Sensing and Geophysical Methods

       Table 2-1 describes four other aerial remote sensing techniques that may have
applications  in  hydrogeologic studies. Thermal infrared scanning can  detect ground-water
discharge into surface waters by sensing temperature differences in the ground water and surface
water. Ellyett and Pratt (1975) considered this technique to be potentially the most useful
                                           2-5

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remote sensing tool in the study of direct hydrogeological indicators. Huntley (1978) evaluated
thermal infrared imagery as a means of detecting shallow aquifers and concluded that it is not
practical to estimate ground-water depth directly. The use of thermal infrared imagery to
estimate soil moisture (Jackson and Schmugge 1986; Jackson et al. 1982 Price, 1980; U.S.
Geological Survey 1982) and evaporation (Price, 1980; Ottle et al., 1989 U.S.  Geological Survey
1982) is reasonably well established. Meierhoff and Weil (1991) reported use of thermal infrared
as one of several methods to locate underground storage tanks  at a 50-acre site. The thermal IR
imagery  successfully located the only confirmed leaking UST at the site and also identified
several areas of buried pipe and metallic debris. Table 2-2 lists  approximately 30 references on
hydrogeologic and contaminated site applications of thermal IR.

       Airborne geophysical methods such as side-looking airborne radar (SLAR), airborne
electromagnetic (AEM) methods, and aeromagnetics have not been used widely in ground-water
contamination studies,  although the potential exists for their use in regional water quality studies.
A special feature of SLAR is its ability to distinguish grain size in alluvium. This technique
requires  unvegetated surfaces, a condition that is most likely to  occur in arid areas  (Ellyett and
Pratt, 1975).

       Surface, rather  than airborne, electromagnetic methods are generally better adapted to
site-specific ground-water contamination studies, since the spatial resolution of airborne EM
methods  (on the order  of several tens of meters) is usually too coarse for contamination
investigations. EPA has been supporting research on the use of airborne electromagnetic to
locate areas of near-surface brine contamination in the Brookhaven oil field in Mississippi (Smith
et al., 1989). Aeromagnetic surveys have been used as a complement to other methods to locate
abandoned wells (Frischknecht,  1990).

       Palacky and West (1991) provide a general review of airborne EM  methods. Hoekstra et
al. (1975) and Arcone (1979) compared airborne and ground resistivity using very low frequency
(VLF) electromagnetic methods  (see Section 4.4) and found that airborne measurements lost
much of  the detail of ground measurements.
                                           2-6

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Table 2-2 Index for  References on Airborne Remote  Sensing  and Geophysical Methods
Topic
References
Remote Sensing Texts
Aerial  Photography

 Photo-Interpretation




 Fracture-Trace  Analysis
 Ultraviolet

 Color Infrared
 Multispectral


 Hydrogeology


 Contaminated Sites
Colwell (1983), Dury (1990), Holz (1973), Kondratyev (1969), Rees
(1990), Reeves (1968, 1975), Regan (1980), Sabins (1978), Ulaby et al.
(1982-microwave), Verstappen (1977), Watson and Regan (1983);
Hvdrologic/Contamination Applications: Burgy and Algaz (1974), Deutsch
et al. (1979), Ellyett and Pratt (1975), Goodison (1985), Lund (1978),
Reeves (1968), Scherz (1971), Scherz and Stevens (1970), Sers (1971),
Thomson et al. (1973)
Avery (1968), Ciciarelli (1991), Denny et al. (1968), Dury (1957),
Johnson and Gnaedigner (1964-bibliography), Lattman and Ray (1965),
Lillesand and Kiefer (1979), Lueder (1959), Miller and Miller (1961),  Ray
(1960), SCS (1973), Strandberg (1967), Wolfe (1974- photogrammetry)

DiNitto (1983), Fetter (1980), Henry (1992), Jansen and Taylor (1988),
Lattman (1958), Lattman and Matzke (1961), Lattman and Nicholsen
(1958), Lattman  and Parizek (1964), Mabee et al. (1990), Parizck (1976),
Setzer (1966), Sonderegger (1970), Trainer (1967), Trainer and Ellison
(1967), Wise and McCrory, (1982), Wobber (1967), Zeil et  al. (1991)

Phillipson and Sangrey (1977), Redwine et al. (1985)

Aller (1984-abandoned wells), Estes et al. (1978), Farrell (1985), Lee
(1992-wetlands), Rehm et al. (1985), Svoma and Pysek (1985), Warren
and Wielchowsky (1973), Williams and Ory (1967), Wilson et al. (1990),
Wolfe (1971)

Cornillon (1987), Davis and Fosbury (1973), Phillipson and Sangrey
(1977), Lee (1991-wetlands, 1992), Wruble et al. (1986)

Estes et al.  (1978), Fisher et al. (1966), Howe (1958),  Sauer (1981),
Wiltala and Newport (1963), Wood (1972)

Texts: Aller (1984-abandoned wells), U.S. EPA (1987); Papers: Baer
and Stokely (1984), Davis and Fosbury (1973-surface water), Erb et al.
(1981), Evans and Mata (1984), Farrell (1985), Finkbeiner and O'Toole
(1985), Hill and  Dantin (1984), Howard (1984), Landers and Johnson
(1978), Merin (1990), Pease and James (1981), Phillipson and Sangrey
(1977), Sangrey and Phillipson (1979), Shelton (1984), Scherz (1971),
Sitton and Baer (1984), Svoma and Pysek (1985), Vizy (1974-oil slicks),
Wilson et al. (1990-septic systems), Wruble et al. (1986)
                                              2-7

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                                         Table 2-2 (cont.)
Topic
References
Other Airborne Methods

 Aeromagnetic




 Electromagnetic (AEM)


 Radar (SLAR)


 Other  Active Microwave


 Thermal Infrared
Other Airborne Applications

 Abandoned Wells


 Contaminated  Sites



 Ground Water
Adams et al. (1971), Fitterman (1990), Frischknecht (1990), Frischknecht
and Raab (1984), Frischknecht et al. (1985), Hanna (1990), Mattick et al.
(1973), Plume (1988), Smith et al. (1989), Vacquier et al. (1951), Zeil et
al. (1991)

Arcone (1979), Becker (1990), Hoeckstra et al. (1975), Palacky (1986),
Palacky and West (1991), Pemberton (1962), Smith et al. (1989)

Lee (1992-wetlands), Mabee et al. (1990), U.S.  EPA (1987), Warren and
Wielchowsky  (1973)

Cameron and Goodman (1989-airbome GPR),  Schmugge et al.  (1980-
soil moisture  measurement)

Texts: Aller (1984-abandoned wells), Lord and  Koerner (1987), Poe et
al. (1971), Rehm et al. (1985), Sharp (1970), Ulaby et al. (1980), U.S.
EPA (1987), USGS (1982): Papers Adams et al. (1971), Davis and
Fosbury  (1973), Englund and Johnson (1977), Estes et al. (1978), Fisher
et al. (1966), Huntley (1978), Idso et al. (1975), Jackson and Schmugge
(1986), Jackson et al. (1982, 1985), Kennedy and Wogec (1991-USTS),
Lord and Koerner (1980), Meierhoff and Weil (1990-USTS), Ottle et al.
(1989), Price  (1980), Sabins (1973), Schmugge and Gurney (1986), Seer
(1980), Souto-Maior (1973), Sucksdorff and Ottle (1990), Wruble et al.
(1986), Yates  et al.  (1988)
Aller (1984), Frischknecht (1990), Frischknecht and Raab (1984),
Frischknecht et al. (1985)

Cameron and Goodman (1989), Kennedy and Wogec (1991), Meierhoff
and Weil (1991),  Smith et al. (1989-brine), Rossiter (1990-oil slicks on
water), Wruble et al. (1986)

Adams et al. (1971), Estes (1978)
                                          2-8

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23  References

See Glossary for meaning of method abbreviations.

Adams, W.M., F.L. Peterson, S.P. Mathur, L.K. Lepley, C. Warren, and R.D. Huber.  1971. A
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Aller, L. 1984. Methods for Determining the Location of Abandoned Wells. EPA/600/2-83/123 (NTIS
        PB84-141530), 130 pp. Also published in NWWA/EPA series by National Water Well
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        gas  detectors]

Arcone, A.A. 1979. Resolution Studies in Airborne Resistivity Surveying at VLF. Geophysics 44(5):937-
        946.

Avery, I.E. 1968. Interpretation of Aerial Photographs, 2nd ed.  Burgess Publishing Company,
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Baer, W.L. and P.M. Stokely.  1984. Incorporation of Hydrogeologic Data into United Sates
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        Investigations of Hazardous Waste Sites.  In: Proc.  5th Nat. Conf. on Management of
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        Spring, MD, pp. 6-10.

Becker, A. 1990. Resistivity Mapping with Airborne Electromagnetic  Induction Apparatus. In: Proc.
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Burn, R.H. and V.R. Algaz. 1974. An Assessment of Remote Sensing Applications in Hydrologic
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Cameron, R.M. and K.S. Goodman. 1989. Detection and Mapping of Subsurface Hydrocarbons with
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Chadwick D.G. 1973. Integrated Measurement of Soil Moisture by Use of Radio Waves. Utah Water
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Ciciarelli, J. 1991. A Practical Guide to Aerial Photography. Van Nostrand Reinhold  New  York,  261
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Colwell, R.N. 1983. Manual of Remote Sensing, 2nd ed. American Society of Photogrammetry, Fall
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Cornillon, P.  1987. Report on  the Usefulness of AVHRR and CZCS Sensors for Delineating Potential
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                                             2-9

-------
 Davis, E.M. and W.J. Fosbury. 1973. Application of Selected Methods of Remote Sensing for Detecting
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 DiNitto, R.G. 1983. Evaluation of Various Geotechnical and Geophysical Techniques for Site
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 Dury,  G.H. 1957. Map Interpretation.  Pitman,  London.

 Dury, S.A. 1990. A Guide to Remote Sensing: Interpreting Images of the Earth. Oxford University
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 Ellyett, C.D.  and D.A. Pratt. 1975. A Review of the Potential Applications of Remote Sensing
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 England A.W. and G.R. Johnson.   1977. Microwave Brightness Spectra of Layered Media. Geophysics
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 Erb, T.L., W.R. Phillipson, W.L. Teng, and T. Liang. 1981. Analysis of Landfills with Historical
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 Estes, J. E., D.S. Simonett, L.R.  Tinney, C.E.  Ezra, B. Bowman, and M. Roberts. 1978. Remote Sensing
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Fisher, W.A. et al. 1966. Fresh Water Springs of Hawaii from Infrared Images. U.S.  Geological Survey
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                                             2-10

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Fitterman, D.F. (ed.).  1990. Developments and Applications of Modern Airborne Electromagnetic
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Hoekstra, P., P.V. Sellman, and A. Delaney. 1975. Ground and Airborne Resistivity Surveys of
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Holz, R.K (ed.) 1973. The Surveillant Science:  Remote  Sensing of the Environment. Houghton Mifflin,
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Howard, G.E.  1984. Airborne Television Applications for Emergency  Response. In: Proc. (1st) Nat.
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Howe, H.L.  1958. Procedures for Applying Airphoto Interpretation in  the Location of Groundwater.
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Huntley, D. 1978. On the Detection of Shallow Aquifers Using Thermal Infrared Imagery. Water
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Idso, S.  B., R.D. Jackson, and R.J. Reginato. 1975. Estimating Evapotranspiration: A Technique
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Jackson, T.J. and T.J. Schmugge. 1986. Passive  Microwave Remote Sensing of Soil Moisture. Advances
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Jackson, T.J., T.J. Schmugge, and J.R. Wang. 1982. Passive Microwave Sensing of Soil Moisture Under
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Jackson, T.J., T.J. Schmugge, and P. O'Neil. 1985. Remote Sensing of Soil Moisture from an Aircraft
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Jansen, J. and R. Taylor.  1988. Surface Geophysical Techniques for Fracture Detection. In: Proc.
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Lattman, L.H. and R.R. Parizek.  1964. Relationship Between Fracture Traces and the Occurrence of
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Lillesand H. and M. Kiefer.  1979. Remote  Sensing and Image Interpretation.  Wiley, New York.
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Lord Jr., A.E., S.  Tyagi, and R.M. Koerner.   1980 Nondestructive Testing (NDT) Methods Applied to
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Phillipson, W.R. and D.A. Sangrey. 1977. Aerial Detection Techniques for Landfill Pollutants. In: Proc.
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Scherz, J.P.  1971. Monitoring Water Pollution by Means of Remote Sensing Techniques. Remote
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 Svoma, J. and A. Pysek.  1985. Photographic Detection of Groundwater Pollution. In: Hydrological
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 Thomson, K.P.B., R.K Lane, and S.C. Csallany (eds.).  1973. Remote Sensing and Water Resources
        Management. AWRA, Proceedings Series No.  17, American Water Resources Association,
        Urbana, IL, 436 pp.

 Trainer, F.W.  1967. Measurement of the Abundance of Fracture Traces on Aerial Photographs.  U.S.
        Geological Survey Professional Paper 575-C, pp. C184-C185.

 Trainer, F.W. and R.L. Ellison.  1967. Fracture Traces in the Shenandoah Valley, Virginia. Photogramm.
        Eng. 32(2): 190-199.

 Ulaby, F.T., R.K Moore,  and A.K Fung.  1982. Microwave Remote Sensing: 3 Vols. Addison-Wesley,
        Reading MA.

 U.S. Environmental Protection Agency (EPA). 1986. Test Methods for Evaluating Solid Waste, 3rd ed.,
        Vol. II Field Manual Physical/Chemical Methods. EPA/530/SW-846 (NTIS PB88-239223); First
        update, 3rd ed., EPA/530/SW-846 .3-1 (NTIS PB89-148076); available as subscription from U.S.
        Government Printing Office (GPO stock no. 955-001-00000-1). [2nd edition published in 1982
        (NTIS PB87-120291); Revised Chapter 11 (Ground-Water Monitoring), covering remote sensing
        and  geophysical methods, should be available in  1993]

 U.S. Environmental Protection Agency (EPA). 1987. A Compendium of Superfund Field Operations
        Methods, Part 2. EPA/540/P-87/001 (OSWER Directive 9355.0-14) (NTIS PB88-181557), 644  pp.
        [remote sensing, EMI, ER, SRR,  SRL, MAG, GPR,  BH]

 U.S. Geological Survey (USGS). 1982. Evaporation and Transpiration. In: National Handbook of
        Recommended Methods for Water Data Acquisition. USGS Office of Water Data Coordination,
        Reston, VA pp 8-1 to 8-57. [Reviews thermal IR remote sensing methods for estimating
        evapotranspiration]

 Vacquier, V., N.C. StaenlanA R.G. Henderson, and I. Zeitz. 1951. Interpretation of Aeromagnetic Maps.
        Geological Society of America Memoir 47.

 Verstappen,  H.Th. 1977. Remote Sensing in Geomorphology. Elsevier, New York.

 Vizy, K.N. 1974. Detecting and Monitoring Oil Slicks with Aerial Photos. Photogramm. Eng. 40(6):697-
       708.

 Warren, W.M. and C.C. Wielchowsky. 1973. Aerial Remote  Sensing of Carbonate Terranes in Shelby
       County, Alabama. Ground Water  11(6): 14-26. [color infrared, SLAR]

Watson, K, and R.D. Regan (eds.). 1983. Remote Sensing. Geophysics Reprint Series No. 3. Society of
       Exploration Geophysicists, Tulsa, OK,  581  pp.

Williams, Jr., R.S. and T.R. Ory. 1967. Infrared Imagery Mosaics for Geological Investigations.
       Photogramm.  Eng. 33(12): 1377-1380.
                                              2-16

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Wilson, T.M., J.A. Gordon, A.E. Ogden, and J.D. Reinhard. 1990. Detection of Failing Septic Tanks in
        East Tennessee Utilizing Infrared Color Aerial Photographs. In: Ground Water Management
        3:177-188 (7th NWWA Eastern GW Conference).

Wiltala, S.W. and T.G. Newport. 1963. Aerial  Observations of Ice Cover to Locate Areas of
        Groundwater Inflow to Streams. U.S. Geological Survey Professional Paper 450-E, pp. E148-
        E149.

Wise, D.U. and T.A. McCrory. 1982. A New Method of Fracture Analysis: Azimuth versus Traverse
        Distance Plots. Geol. Soc. Am.  Bull 93:889-897.

Wobber, FJ. 1967. Fracture Traces in Illinois.  Photogramm. Eng. 33(5):499-506.

Wolfe, E.W.  1971. Thermal IR for Geology. Photogramm. Eng. 37:43-52.

Wolfe, P.R. 1974. Elements of Photogrammetry. McGraw Hill, New York, 562 pp.

Wood C.R. 1972. Groundwater Flow. Photogramm. Eng. 38(4):347-352.

Wruble, D.T., J.J. Van Ee, and L.G. McMillion. 1986. Remote Sensing Methods for Waste Site
        Subsurface Investigations and Monitoring. In: Hazardous and Industrial Solid Waste Testing and
        Disposal: Sixth Volume, R.A. Conway,  et al. (eds.), ASTM  STP 933, American Society for Testing
        and Materials, Philadelphia, PA, pp.  243-256. [Airphotos, multispectral, thermal IR, surface
        geophysics]

Yates, S. R, A.W. Warrick, A.D. Matthias, and S. Musil. 1988. Spatial Variability of Remotely-Sensed
        Surface Temperatures at Field Scale. Soil Sci. Soc. Am. J. 52:40-45. [thermal IR]

Zeil, P., P. Volk, and S.  Saradeth.  1991. Geophysical Methods for Lineament Studies in Groundwater
        Exploration: A Case History for SE Botswana.  Geoexploration 27:165-177.  [aeromagnetic,
        satellite imagery, VLF]
                                             2-17

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                                          CHAPTER  3
                     SURFACE  GEOPHYSICS:  ELECTRICAL  METHODS
        No  other  surface geophysical methods have  been used  more widely  than electrical and
electromagnetic  methods  in the study of  ground water  and contaminated  sites.  Only  downhole
logging methods are more  confusing in their  classification  and terminology  to the  uninitiated  (see
Chapter 7).  Terms such as geoelectrical,  geoelectromagnetie,  and resistivity survey may be used
in the literature to  apply to  one or more  of a variety of geophysical  methods.  The same method
may be called by different names.
3.1 Electrical  versus  Electromagnetic  Methods

        Usually the term electrical applies to methods  in  which electrical currents are injected
into the ground  by the  use  of direct contact electrodes.  Electrical methods  operate  using direct
current  (DC) or  frequencies that are  so low  (perhaps  10  Hz)  that there are  no
electromagnetically induced  currents in the ground,  only  those generated by  the  electrodes.

        Electromagnetic methods (as the term is commonly used),  which involve the  use of lower
frequency radio waves and  audio  portions  of the  EM spectrum  (see  Figure  1-1), are covered  in
Chapter  4.  Direct  contact of EM  instruments with the ground may  be required depending  on the
measurement technique used, but  in  all  cases  electric  currents are electromagnetically induced  in
the ground,  rather than  generated  with electrodes. EM methods  such  as ground  penetrating
radar  that  use  the higher frequency portion of the EM spectrum  (radar and  microwaves) are
discussed in the  Chapter  6  (Section  6.1). DC electrical resistivity  methods  cause  different current
patterns  in  the ground and  may not  measure the  same subsurface properties  as EM methods.
                                               3-1

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        3.1.1  Types of Electrical  Methods


        As noted in Chapter 1, electrical and EM methods can be broadly classified according to

 whether the field source for which a subsurface response is measured is  natural or artificial (see

 Table 1-3). The three major types of electrical methods are DC electrical resistivity and induced
 polarization (including complex resistivity), which involve artificial field sources, and self-

 potential, which involves the measurement of natural electrical currents in the subsurface.


        The principal method used in the study of ground water and contaminated sites until

 about 10 years ago was DC electrical resistivity. Since the 1980s, electromagnetic induction

 methods have gained increasing  popularity and now are generally the preferred method for
 ground-water contamination studies.
       3.1.2  Subsurface Properties  Measured


       Electrical and electromagnetic methods also can be classified by the subsurface properties

they measure. These involve three major phenomena and properties associated with rocks and
ground water:
              Resistivity,  or the reciprocal conductivity, which governs the amount of current
              that moves through rock material when a specified potential difference is applied.
              ER and electromagnetic methods measure the same subsurface properties and can
              be reported in either of two types of units (see below for conventions).

              Electrochemical activity, which is caused by chemical activity in ground water and
              charged mineral surfaces. This provides the basis for self-potential and induced
              polarization methods.

              The dielectric constant, which  is a measure of the polarizability of a material in
              an electric field, and gives information on the capacity of rock material to store an
              electric charge. This property is  important in the use of induced polarization
              (Section 3.5) and ground penetrating radar (Section 6.1).
       As noted above, since conductance and resistance are reciprocals, the output of both EM
and ER methods can be expressed in either of two measurement scales (i.e.,  1 ohm-meter =


                                            3-2

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 1000 milliSiemens/meter). By convention ER and VLF (Section 4.4) measurements are typically
 reported in units of resistivity. Electromagnetic induction (Section 4. 1) and time domain
 electromagnetic measurements (Section 4.2) are typically reported in units of conductivity. The
 published literature on ER and EM methods,  however, does not always follow these conventions;
 thus EM measurements may be  reported in terms of resistivity or ER measurements in terms of
 conductivity. The method used to measure subsurface properties (induction for EM, and current
 injection by electrodes for ER) will indicate the technique,  but not necessarily the units in which
 the measurements are reported. EM and ER  methods are by far the most widely used surface
 geophysical techniques in ground-water contamination studies (see Tables 3-1 and 3-2  for ER,
 and Tables 4-1 and 4-2 for EMI).
3.2 Direct  Current Electrical Resistivity

       The direct current (DC), also called "galvanic", electric resistivity method measures the
resistance to flow of electricity in subsurface material. DC methods involve the placement of
electrodes, called current electrodes, on the surface for injection of current into the ground. The
current stimulates a potential response between two other electrodes, called  potential electrodes,
that is measured  by a voltmeter (Figure 3-1). Resistivity (measured in ohm-meters) can be
calculated from the geometry and spacing of the electrodes, the current injected, and the voltage
response.

       DC methods date from the early part of this century (Ward, 1980), with applications in
ground-water investigations dating from the late  1930s (Lee, 1936;  Sayre and Stephenson, 1937;
Swartz 1937, 1939). DC methods are identified  according to the arrangement of the current and
potential electrodes. Until the 1960s, the most common electrode arrays used in resistivity
investigations were the Wenner,  Lee-Partitioning, and Schlumberger arrays (Figure 3-2). In
more  recent years the Schlumberger array generally has been the preferred method in ground-
water investigations, although the Wenner array also is commonly used.

       Advantages of the Schlumberger array  over the Wenner array include the following
(Zohdyetal., 1974):

                                            3-3

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                            Current Source
                                                •^Current Meter


                                          sVolt Meter
                                                                        Surface
                           Current Flow
                           Through Earth
Figure 3-1     Diagram showing basic concept of resistivity measurement (from Benson et al, 1984).
                                       3-4

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                            M                   N                   B

                            •                   •                  •

                           >K -  a  - >K - a - ^


                             Wenner Electrode Array
                            M
                                 a   ^,^  _a_
                                 p   ^*T^.   O
                          Lee-Partitioning  Electrode Array
                                    M  N

                      AB  	T^	 _AB
                     ~2             ^^             2

                           Schlumberger Electrode Array
Figure 3-2   Wenner, Lee-Partitioning, and Schlumberger electrode array^_A and B are current

            iectrodes, M, N,  and  O  are
             (from Zohdy et  al,  1974).
                                                        fl       AR
electrodes,  M,  N, and O are potential electrodes; a, T , and -y  are electrode spacings
                                                         3-5

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               Sounding curves provide slightly greater probing depth and resolving power than
               Wenner soundings for equal AB electrode spacing.
               Less manpower and time is required for making soundings than for a Wenner
               array.
               When wide electrode spacings are used, stray currents in industrial areas and
               telluric currents are  more likely to affect measurements  with the Werner array.
               The Schlumberger array is more sensitive in measuring lateral variations in
               resistivity.
               The Wenner array is more susceptible to drifting or unstable potential differences
               created by driving electrodes into the ground.
               Schlumberger sounding curves can be more readily smoothed.
       The Wenner array, however, holds several advantages over the Schlumberger array,
including simplicity of the apparent resistivity formula, relatively small current values required to
produce measurable potential differences, and availability of a large album of theoretical master
curves for two-, three-, and four-layer earth models (Mooney and Wetzel, 1956).

       Dipole-dipole arrays, originally developed in the Soviet Union in the 1950s, have certain
advantages over the Schlumberger array for deep soundings because relatively short AB  and MN
lines reduce field measurement times. Also, fewer problems are associated with current  leakage
and inductive coupling than for Schlumberger soundings. The equatorial variant of this type of
array (Figure 3-3) has been used in this  country for ground-water investigations (Zohdy, 1969).
Paired electrodes that are close together are called dipoles; if widely spaced, they are called
bipoles, as with the current electrodes in  the equatorial array (see Figure 3-3). The main
disadvantages of dipole-dipole arrays are  that a large generator is required to provide current,
especially for deep  soundings, and interpretation of data  is less straightforward than for
Schlumberger and Wenner array measurements (Zohdy et al,  1974).

       Figure 3-4a  shows use of resistivity measurements in delineating  a leachate plume from a
landfill by isopleths of equal  resistance  measured in ohm-feet.  Since landfill leachate contains
ions that decrease the resistivity  of ground water, the lower-value isopleths in Figure 3-4a
                                            3-6

-------
   A  Q   B

    Azimuthal
                   M
     A   Q    B
     Perpendicular
                                M
  x'l
*    'r
      I
A        Q        B
      Equatorial
                                                          k
                                                                               M
                                         A  Q    B
                                               Parallel
                                                     A   Q    B
                                                      M   O   N
                                                                   Axial or Polar
Figure 3-3         Dipole-dipole arrays. The equatorial array is bipole-dipole because AB  is large
                   (from Zohdy et al., 1974).
                                                3-7

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          Shallow Measurements of Pollutant Plume
                                                                              240
          Deep Measurements of Pollutant Plume (0-45')
Figure 3-4a       Resistivity soundings and profiles: isopleths of resistivity  sounding data showing extent
                   of a landfill plume (from Benson et al, 1984).
          2  300
          
              100
         i
              50
             Horizontal Distance, in Meters

     100          200          300

    _J _ I _ I
                                                                   400
                                                                                 500

                                                                                 I
         I
                                        I
                   Gravelly Clay
          Gravel
Clay
Gravel
J_
                       j_
Clay
Gravel
                                              J	I
                 0     200    400     600     800    1,000    1,200   1,400   1,600

               West                   Horizontal Distance, in Feet                     East
Figure 3-4b        Resistivity soundings  and profiles:  resistivity profile across glacial clays and gravels
                   (from Zohdy et al., 1974).

                                                3-8

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delineate the most contaminated areas (140 ohm-feet in the upper map and 180 ohm-feet in the
lower map). In the figure, the deep measurements (O to 45  feet) include an averaging of the
resistivity of the shallow measurements and the resistivity of the 15- to 45-foot depth interval.
Figure 3-4b shows a horizontal resistivity profile that indicates lateral changes from clay and
gravel material in the subsurface. Table 3-1 provides a general index  to major texts  and review
papers on DC resistivity, and Table 3-2 lists over 250 references on applications for  ground-
water, geologic- and contaminated site characterization.
3.3 Specialized Applications of DC  Resistivity

       Azimuthal resistivity uses conventional Wenner or Schlumberger arrays, but the
configuration is rotated 10 degrees clockwise and successive resistivities are measured (Figure 3-
5a). The variations in electrical response to  changes in the orientation of electrode arrays  can be
used to identify the location of subsurface fractures and joint orientations. Figure 3-5b shows
variations in resistivity readings over fractured (Array A) and unfractured (Array B) areas  of
landfill cover. The fractured area is  evidenced by overall higher readings during wet conditions
and asymmetrical resistivities during dry conditions. In recent years, this method has gained
some popularity for characterization of fractured rock and contaminated sites (Table 3-3).
Although this method was first described by Zohdy (1970a) as the variable azimuth method to
differentiate it from the azimuthal method developed by  the Russians (a variant of the equatorial
array-see Figure 3-3), the term azimuthal resistivity seems to have taken hold in the recent
literature.

       Tri-potential resistivity, which involves taking readings from three  arrays (Wenner, dipole-
dipole, and bipole-bipole-Figure 3-5c) at each station was first proposed by Carpenter (1955).
A simple switching circuit built into the resistivity meter permits the rapid switching from one
array to the next without physically  moving  the electrodes. The additional information obtained
from multiple readings at the same site is especially useful for locating fracture zones, filled
sinks, and subsurface cavities. As the reference list in Table 3-3 indicates, this is not a very
commonly used method; however, its limited use seems to stem more from a lack of familiarity
                                            3-9

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                                                                         N
                                                                         I
                                                                 electrodes
  Figure 3-5a Specialized DC resistivity electrode configurations: layout of azimuthal resistivity
               array (Carpenter et al, 1991).
Figure 3-5b Specialized DC resistivity electrode configurations: azimuthal resistivity variations of
              fractured and unfractured landfill cover (Carpenter et  al.,  1991).
                                             3-10

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Figure 3-5c Specialized DC resistivity electrode configurations: tri-potential electrode array
             (Kirk and Rauch, 1977b).
                                            3-11

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with the method than from any inherent problems, and more widespread use for the applications
mentioned above is probably merited.

       Tomographic imaging is a relatively new DC resistivity method in which a grid of
electrodes is established on the ground surface. Controlled currents are introduced into a subset
of electrodes in a prescribed sequence and the electrical response of the other electrodes is
measured. These  signals are processed  using tomographic theory to create a three-dimensional
image of the subsurface (see Section 7.2.3). High vertical and horizontal resolution of
contaminant plumes have been obtained in the laboratory, but grid edge effects have  created
difficulties in field applications (Tamburi et al., 1988).
3.4 Self-Potential

       Self-potential involves the measurement of natural electrical potentials developed locally
in the subsurface by electrochemical or electrofiltration processes. Several types of natural
potentials may be measured by this method. Spontaneous polarization is a natural voltage
difference that occurs as a result of electrical currents induced by chemical disequilibria within
the earth. Streaming  potential is an electrokinetic effect related to the movement of fluid
containing ions through the  subsurface.

       The method is very simple, requiring only the measurements of the potential  between two
electrodes along transects in the area of interest (Figure 3-6a). Care is required to make  sure
that there is good ground-electrode contact for each measurement.  This method can be used to
(1) locate areas of ground-water flow in fractured rock and sinkholes, (2) locate leaks in
reservoirs and canals, and (3) detect and monitor movement of contaminant plumes (Table 3-3).
Gilkeson and Cartwright (1982) note that ER and EM methods can be expected to provide
superior results in the detection of contaminant plumes. Section 1.2.2 in U.S. EPA (1993)
summarizes  advantages and disadvantages of self-potential measurements. Perhaps the most
common use of this method has been in mineral exploration where  ore bodies are in contact with
solutions of different compositions.
                                            3-12

-------
       A variant of self-potential in which current is injected into the ground to enhance the
streaming potential effect has been developed to detect leaks in lined ponds (Figure 3-6b).
Geomembrane liners have high resistivity and will provide relatively uniform potential readings
between two electrodes. If the liner is punctured, fluid flow through the leak creates a
conductive path for the flow of injected current and produces anomalous potential readings in
the vicinity of the leak.
3.5 Induced Polarization  and Complex Resistivity

       Induced polarization (IP) is an  electrical method that measures electrochemical responses
of subsurface material (primarily clays) to an injected current. In time domain IP surveys, the
rate at which voltage decays after current injection stops is measured, while infrequency domain
IP surveys, the effect of frequency on electrical resistivity is measured. Frequency domain
measurements are more precise when induced polarization effects increase with depth; time
domain are better when induced polarization effects decrease with depth (Patella and Schiavone,
1977)$

       IP surveys are conducted in a similar manner to DC surveys, and all IP  instrumentation
can be used for conventional DC surveys. IP surveys are more expensive than DC surveys and
have  some of the same disadvantages relative to EM methods, such as the requirement for good
electrode contact with the ground. In some situations, particularly where clayey and nonclayey
unconsolidated materials must be differentiated IP surveys can provide more useful information
than DC surveys alone.   A few investigators have reported use of IP surveys in ground-water
exploration (Table 3-4). Use at contaminated sites has been rare (Hughes et al, 1986;
Krumenacher and Taylor, 1988), however, and should be considered experimental. Lord and
Koerner (1980, 1987) gave this method a low rating compared to alternative methods for
detection of buried containers.

       Complex resistivity, a more  refined version of induced polarization, measures the
frequency characteristics of different materials over a larger frequency spectrum than frequency
domain IP. The method potentially allows greater differentiation of subsurface materials  than
                                            3-13

-------
                  ll
Line Stationing
                                                          Porous Pot Electrode
                        ___	  I Water Table 1
                        -1?-_: t ~- T-5-" i—ri
                                      J*
                                        r±r
Figure 3-6a Self-potential measurements: apparatus and graph of measurement over a fissured zone
              of limestone illustrating negative streaming potential  caused by ground-water seepage
              (Ogilvy and Bogoslovsky, 1979).
                     Remote
                     Current
                     Return
                    Electrode
                                   Current
                                  Flow Lines
                      Current
                      Source
                     Electrode
                                                                   Moving
                                                                 Measurement
                                                                  Electrodes
                                                                      Liquid
                                                                        Membrane Liner
Figure 3-6b Self-potential measurements: electrical leak detection using modified self-potential
             method (Danlek and Parra, 1988 b).
                                           3-14

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conventional IP, but the instrumentation for signal detection and analysis is more complex and
consequently costs are even higher. Complex resistivity has the potential advantage of being able
to detect organic contaminant plumes where DC methods are relatively unsuccessful in this
application (Pitchford et al, 1988; Olhoeft, 1990, 1992). Nonetheless complex resistivity
methods are still more or less at the research stage of development and instrumentation is not
widely available. Because of the larger frequency spectrum, complex resistivity is the method
most susceptible to interference from cultural materials (e.g., buried metallic containers, cables,
pipelines) of the electrical methods.
                                           3-15

-------
Table 3-1 Index to General References on DC Electrical Resistivity Methods
Topic
References
Textbooks/Reports

Electrical  Resistivity
Interpretation
Geoelectric Properties

Other Texts
Bhattacharya and Patra (1968), Goldman (1990-nonconventional
methods), Keller and Frishcknecht (1970), Kofoed (1979), Kunetz (1966),
Mooney (1980), Patra and Mallick (1980), Soiltest, Inc. (1968); see also
Table 1-4 for identification of general geophysics texts covering electrical
methods

Texts:  Kalenov (1957), Mooney and Wetzel (1956), Orellana and Mooney
(1966, 1972), Van Nostrand and Cook (1966), Verma (1980); Computer
Programs: Basokur (1900), Davis (1979), Sheriff (1992), Zohdy (1974a,b),
Zohdy and Bisdorf (1975); Papers: Cook and Van Nostrand (1954),
Frangos (1990), Keck et al. (1981), Radstake et al. (1991), Zohdy (1964,
1974c, 1975, 1989)

Parkhomenko (1967), Wait (1982), Wheatcraft et al. (1984)

Benson et al. (1984), Kirk and Warner (1981- cavity detection), Redwine
et al. (1985), Rehm et al.  (1985), U.S. EPA (1987),  Lord and Koerner
(1987), Pitchford et al.  (1988), USGS (1980), Zohdy et al. (1974)
General Papers

Review Papers


EM/ER Comparisons

Data Analysis

Subsurface  Electrical
Properties



Instrumentation
Maillet (1947), Roman (1952), Roy and Apparao (1971), Ward (1980,
1988)

See references indexed in Table 4-1

Jones (1937), LaBrecque et al. (1984), LeBrecque and Weber (1984)

Barton (1984), Collett and Katsube  (1973), Hackett (1956), Jackson et al.
(1978), Jagammadha and Rao (1962), Kean et al. (1984), Kelly and
Frohlich (1985), Ward and Fraser (1967), Wong et al. (1984), Worthington
(1977a)

Electrode Arrays:   Carrington  and  Watson (1981), Zohdy  (1970a,b,c);
Automated Data Acquisition:  Jackson et al. (1990), Taylor  (1985)
                                             3-16

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Table 3-2 Index to References on Applications of DC Resistivity Methods
Topic
References
Ground-Water Applications

General
U.S. Case Studies
Non-U.S. Case Studies
Aquifer Properties
Bays (1946, 1950), Bays and Folks (1944), Benson (1991), Bernard and
Valla (1991), Breusse (1963), Buhle (1953), Butler and Llopis (1985),
Cook et al. (1992-recharge), Harmon and Hajicek (1992-stream-
aquifer connections), Henriet (1976), Kelly (1961), Kelly et al. (1989),
Mark et al. (1986), Meidav (1964)), Paver (1945), Ringstad and Bugenig
(1984),  Shields and Sopper (1969—watershed hydrology), Stewart et al.
(1983), Stickel et al. (1952), Urish and Frohlich (1990), Van Dam (1976),
Workman and Leighton (1937), Worthington (1975a), Worthington and
Griffiths (1975)

Ackermann (1976-permafrost areas), Adams et al. (1971), Bisdorf
(1990),  Bisdorf and Zohdy (1979),  Buhle  and Brueckmann (1964),
Carpenter and Bassarab (1964), Cherkauer and Taylor (1988), Dudley
and McGinnis (1962),  Foster and Buhle (1951), Frohlich (1973,  1974),
Gabanksi et al. (1984), Hoekstra et al. (1975—permafrost), Joiner and
Scarborough (1969), Joiner et al. (1967, 1968),  Kent and Sendlein (1972),
Lee (1937), Mattick et al. (1973), Merkel and Kaminski (1972), Page
(1968), Pool and Heigold (1981), Priddy (1955), Rijo et al. (1977),
Samuelson (1987), Stewart and Wood (1986), Stewart et al. (1985),
Stierman et al. (1986), Taylor (1992), Tucci (1984), Underwood et al.
(1984), Wantland (1953),  Watson et al. (1990), Wilson et al. (1970),
Windschauer (1986), Woessner et al. (1989), Zohdy (1965,  1969,  1988),
Zohdy and Jackson (1969)

Canada: Hobson et al.  (1962), Lennox and Carlson (1970); Germany:
Flathe (1955, 1964, 1970, 1976), Hallenbeck (1953); Other- Fournier
(1989—France), Maderios and de Lima (1992-Brazil), Martinelli
(1978-South Africa), Mbonu et  al.  (1991—Nigeria), Sayed
(1984-Egypt), Topper and Legg (1974-Zambia), Van Dam and
Meulenkamp (1967), Van Overmeeren (1981-Sudan; 1989—Yemen),
Verma et al. (1980-India), Wachs et al. (1979—Israel), Worthington
(1977a-Kalahari)

Ahmed et al. (1988), Bardossy et al. (1986), Barker and Worthington
(1973), Biella et al. (1983), Coetsee et al. (1992), Frohlich (1972),
Frohlich and Kelly (1983, 1988), Frohlich  and  Smith (1974), Gilmer et al.
(1986-alluvial aquifer), Heigold et  al. (1979), Huntley (1986), Huntley
and Mishler (1984), Jackson et al. (1978), Jagammadha and Rao (1962),
Kean et al.(1984), Kelly (1976a,  1977), Kelly and Frohlich (1985), Kelly
and Reiter (1984), Kosinski and Kelly (1981),  Kwader (1985), Mazac et
al. (1985), Niwas and Singhal (1985),  Park and Dickey (1989), Ritzi and
and Andolesk (1992), Sauk and Zabik (1992), Sehimsal (1981), Sjostrom
and Sill (1991), Taylor and Cherkauer (1984), Urish (1981), White
(1988-chloride tracer), Worthington (1975b, 1976, 1977b)
                                                  3-17

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                                         Table 3-2 (cont.)
Topic
References
Geologic  Characterization  Applications
General
Glacial  Deposits
Karst
Fractured Rock
Permafrost
Benson (1991), Cook and Nostrand (1954-filled sinks), Emilsson and
Morin (1989—buried channel), Ghatge and Pasicznyk (1986-bedrock
topography), Hawley (1943—fault location), Hubbert (1944-faults), Page
(1968), Smith  (1974-buried valley), Spicer (1952), Tucci (1986),
Wantland (1952—depth weathered rock), Wilcox (1944-sand and gravel)

Denne et al. (1984-glacial buried valleys), Hackett (1956), McGinnis and
Kempton (1961), Reed (1985), Reed et al. (1983), Samuelson (1987),
Shoepke and Thomsen (1991), Stierman et al. (1986), Urish (1981)

Filler and Kuo (1989), Fretwell and Stewart (1981), Frohlich and Smith
(1974), Joiner  and Scarborough (1969), Kirk and Werner (1981), Riitzi
and Andolesk (1992), Rodriguez and Wellner (1988), Smith and
Randazzo (1986, 1989), Stewart and Wood  (1986), Watson et al. (1990)

Adams et al. (1988), Bernard and Valla (1991), Burdick (1982), Johnson
and Saylor (1987), Pfeiffer et al. (1990), Smith and Randazzo (1989),
Ritzi and Andolesk (1992), Williams et al. (1990)

Hoeckstra  et al. (1975)
Contaminated Site Abdications
General/Unspecified
Ground-Water Monitoring
Vadose Zone Monitoring
Benson (1991), Borns and Pickering (1990), Braehl (1983, 1984a,b),
Corwin (1986), Evans and Scwheitzer (1984), Fowler and Ayubcha (1986),
Fox and Gould (1984), Gilkeson et al. (1984), Mazac et al. (1987, 1989,
1992), Pennington (1985), Pitchford et al. (1988),  Rodriguez (1984), Urish
(1983), White and Brandwein (1982), White et al.  (1984), Williams et al.
(1984)

Beeson and Jones (1988), Benson et al.  (1985, 1988), Bogoslovsky and
Olgilvy 1970a~dam   seepage), Ehrlich  and Rosen (1987), Gilkeson and
Cartwright (1982), Kean and Rogers (1981), Lange et al. (1986), Noel et
al. (1982), Rumbaugh et al. (1987), Stearns and Dialmann (1986),
Yazicigil  and Sendlein (1982)

Frohlich and Parke (1989), Kean et al. (1987)
                                            3-18

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                                          Table 3-2 (cont.)
Topic
References
Contaminated Site Applications (cont.)
Contaminant  Plumes
Industrial/Hazardous
Waste Sites
Landfill Leachate
Salt Water Interface/
Brine Contamination
Soil  Salinity
Miscellaneous
Brickell (1984), Greenhouse et al. (1985), Kean and Rogers (1981),
LeBrecque et al. (1984a,b), Schneider and Greenhouse
(1992-perchloroethylene), Tamburi et al. (1985,  1988-tomographic
imaging), Urish (1984-radioactive plume)

Allen and Rogers  (1989), Bradley  (1986), Cichowicz et al. (1981), Evans
and Schweitzer (1984), Gilmer and Helbling (1984), Harman (1986),
Hitchcock and Harman (1983), Horton et al. (1981), Kolmer (1981),
Pease et al. (1981), Peterson et al. (1986), Rudy and Caolie (1984),
Saunders and Stanford (1984), Shoepke and Thomsen (1991), Stellar and
Roux (1975), Slaine and Greenhouse (1982), Stearns and Dialmann
(1986), Stierman (1981), Stierman and Ruedisili (1988), Walther  et al.
(1983), White and Brandwein (1982), Williams et al. (1984)

Allen (1984-paper mill), Carpenter (1990), Carpenter et al.
(1990a-landfill structure), Cartwright and McComas (1968), Evans and
Schweitzer (1984), Greenhouse and Harris (1983),  Keck et al. (1981),
Kelly (1976a), Kelly et al.  (1988),  Klefstad et al. (1975), Laine et al.
(1985), Roberts et al. (1989), Roux (1978), Rudy and Caolie (1984),
Rumbaugh et al.  (1987), Russell (1990), Russell and Higer (1988), Seitz
et al. (1972), Stellar and Roux (1975), Sweeney (1984), Walsh (1988)

Berk and Yare (1977—sodium salts), Chapman and Bair (1992),  Ginsberg
and Lavanon (1976), Gorban (1976), Gondwe (1991), Knuth (1988),
Plivas and Wong (1975), Reed et al. (1981), Roy and Elliot (1980), Sayre
and Stephenson (1937), Schroeder (1970), Stewart  (1982), Swartz (1937,
1939), Warner (1969—brine  ponds)

Table 9-3  in Boulding (1992) contains an index of  over 70 references
related to  use of four-electrode resistivity, electrical conductivity  probes
and electrical resistance salinity sensors for measurement and monitoring
of soil salinity

Adams et al. (1988-UST), Allen et al. (1985—spray irrigation leachate),
Aller (1984-abandoned wells), Andres and Canace
(1984-hydrocarbons), Burdick (1982-abandoned mines and mine
leachate),  Fink and Aulenbach (1974-sewage effluent), Fountain
(1976-cavity detection), Hackbarth (1971—sulfite liquor), Merkel
(1972—acid mine drainage), Rogers and Kean (1980-flyash leachate),
Van et al. (1991—pond leaks), Warner (1969—sewage effluent)
                                                3-19

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Table 3-3 Index to References on Specialized DC Electrical Resistivity and Self-Potential Methods
Topic
References
Specialized DC  Resistivity Methods
Azimuthal  Resistivity
Tri-potential



Tomographic  Imaging

Self-Potential

General
Ground-Water Monitoring


Contaminant  Plumes

Reservoir/Canal  Leaks


Liner/Pond Leak Detection
Ground Water

Karst
Contaminated Sites: Jansen and Taylor (1989); Carpenter et al. (1990b,
1991—fractured landfill cover): Fractured Rock Jansen (1990), Ritzi and
Andolesk  (1992), Taylor (1984),  Taylor and Jansen  (1988), Taylor and
Fleming  (1988),  Jansen  and  Taylor (1989),  Leonard-Mayer (1984a,b),
Zohdy n970aV  Other: Sauck  and Zabik (1992)

Carpenter (1955), Habberjam  (1969-cavity detection), Kirk and  Rauch
(1977a—fracture  detection; 1977b-karst hydrogeology), Ogden and Eddy
(1984-fractures/caves), Ogden  et al.  (1991  -USTs)  '"" '

Tamburi et al.  (1985,  1988)
Ahmed  (1963), Corwin (1990),  HRB Singer (1971—abandoned mines),
Bogoslovky and  Ogilvy  (1972-fissured  media; 1977—landslides), Lord
and Koerner (1980, 1987), Ogilvy and Bogoslovsky  (1979), Ogilvy and
Kuzima (1972)

Gilkeson and Cartwright  (1983), Lange et al. (1986), Redwine  et al.
(1985),  Rehm et al.  (1985)

Corwin  (1986), Hughes et al. (1986), Smith (1991)

Bogoslovsky and Ogilvy (1970a,  1970b, 1973, 1977), Ogilvy et al. (1969),
Smith (1991), Yule  et  al.  (1985)

Darilek  and Parra (1988a,b), Darilek and Laine  (1989), Fountain (1986),
Laine and Miklas (1989), Parra (1988a,b), Peters et al. (1982a,b), Schultz
and Duff (1985),  Schultz et al.  (1984a,b), Van  et al. (1992),  Wailer and
Davis   (1984)

Fournier (1989—volcanic  area)

Erchul  and  Butler (1986),  Lange and Quinlin  (1988)
                                             3-20

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Table 3-4 Index to References on Induced Polarization Electrical Methods
Topic
References
Texts


Papers




Frequency Domain


Time Domain


Complex Resistivity


Subsurface  Response

Ground Water
Field  Applications
Contaminated Sites
Baizer and Lund (1983), Berlin and Loeb (1976), Bottcher (1952), Fink et
al. (1990), Sumner (1976), Wait (1959, 1982)

Bleil (1953), Frische and von Buttlar (1957), Keevil and Ward (1962),
Madden and Cantwell (1967), Marshall and Madden (1959), Seigel
(1959), Sumner (1979), Taylor (1985), Vogelsang (1974), Ward (1980,
1988)

Barker (1974), Hallof (1964), Patella and Schiavone (1977), Zonge et al.
(1972)

Bertin (1968), Patella and Schiavone (1977), Roy and Shikhar (1973),
Zonge etal. (1972)

Cleff (1991), Olhoeft (1984, 1990, 1992), Olhoeft and King (1991),
Wheatcraftetal. (1984)

Barker (1975), Olhoeft (1985)

Adams et al. (1975), Bodmer et al. (1968), Mohamed (1970), Ogilvy and
Kuzima (1972), Roy and Eliot (1980), Vacquier et al. (1957),
Worthington (1975b); Texts with Brief Discussions: Rehm et al. (1985),
U.S. Geological Survey (1977)

Ahgoran et al. (1947- cultural metallic refuse), Baker (1975),
Bogoslovsky and Olgilvy (1970a), Hughes et al. (1986-brine toxic waste
plume), HRB Singer (1971), Krumenacher and Taylor (1988-organic
contaminants)

Complex Resistivity: Olhoeft et al. (1986-hydrocarbons, 1992), Pitchford
et al. (1988), Walther et al. (1983, 1986), Yong and Hoppe (1989); IP.
Lord and Koerner (1980, 1987-low rating for detection of buried
containers)
                                             3-21

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3.6 References

See Glossary for meaning of method abbreviations.

Ackermann, H.D. 1976. Geophysical Prospecting for Ground Water in Alaska. U.S. Geological Survey
        Earthquake Information Bull. 8(2) : 18-20. [ER, SRR in permafrost areas]

Adams, J. M., W.J. Hinze, and L.A. Brown. 1975. Improved Application of Geophysics to Groundwater
        Resource Inventories in Glaciated Terrains. Water Resources Research Center Tech. Report No.
        59 (NTIS PB244-879). Purdue University, West Lafayette, IN. [GR, IP]

Adams, M.L., M.S. Turner, and M.T. Morrow. 1988. The Use of Surface and Downhole Geophysical
        Techniques to Characterize Flow in a Fracture Bedrock Aquifer System. In: Proc. 2nd Nat.
        Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH, pp. 825-847. [EMI, ER, SRR, BH]

Adams, W. M., F.L. Peterson, S.P. Mathur, L.K Lepley, C.  Warren, and RD. Huber. 1971. A
        Hydrogeophysical Survey Using Remote-Sensing Methods from Kawaihae to Kailua-Kona,  Hawaii.
        Ground Water 9(1):42-50. [ER, AMT, aerial thermal infrared, aeromagnetic]

Ahmed, M.U. 1964. A Laboratory Study of Streaming Potentials. Geophysical Prospecting 12(l):49-64.

Ahmed S., G. de Marsily, and A. Talbot. 1988. Combined Use of Hydraulic and Electrical Properties of
        an Aquifer in a Geostatistical Estimation of Transmissivity. Ground Water 26(l):78-86.

Allen, R.P. 1984. Electrical Resistivity Surveys Used to Trace Leachate in Ground Water from Paper
        Mill Landfill. In: Proc. of the NWWA Tech. Division Eastern Regional Ground Water
        Conference (Newton, MA), National Water Well Association, Dublin, OH, pp. 167-174. [EMI,
        ER]

Allen, R.P. and B.A. Rogers.  1989. Geophysical Surveys in Support of a Remedial
        Investigation/Feasibility Study at the Municipal Landfill in Metamora, Michigan. In: Proc. 3rd
        Nat. Outdoor Action Conf.  on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH, pp.  1007-1020. [ER, MAG, SRR]

Allen, J.P., R. Popma, and P. Doolen. 1985. Electrical  Resistivity/Terrain Conductivity Surveys to Trace
        Process Wastewater Leachate in Ground Water from a Spray Irrigation System. In: Proc. of the
        AGWSE Eastern Regional Ground Water Conference (Portland, ME), National Water Well
        Association, Dublin, OH, pp. 243-251. [EMI, ER]

Aller, L. 1984. Methods for Determining the Location of Abandoned Wells. EPA/600/2-83/123 (NTIS
        PB84-141530), 130 pp. Also published in NWWA/EPA series by National Water Well
        Association, Dublin, OH. [air photos, color/thermal IR, ER, EM I,  GPR, MD, MAG, combustible
        gas detectors]

Andres, K.G. and R. Canace.  1984. Use of the Electrical Resistivity Technique to Delineate a
        Hydrocarbon Spill in the Coastal Plains Deposits of New Jersey (of the New Jersey Coastal Plain):
        A Case Study. In: Proc. (1st) NWWA/API Conf. on Petroleum Hydrocarbons and Organic
        Chemicals in Ground Water—Prevention, Detection and Restoration, National Water Well
        Association, Dublin, OH, pp. 188-195.
                                              3-22

-------
Angoran, Y.E., D.V. Fitterman, and D.J. Marshall.  1974. Induced Polarization: A Geophysical Method
        for Locating Cultural Metallic Refuse. Science 1841287-1288.

Baizer, M.M. and H. Lund (eds.). 1983. Organic Electrochemistry, 2nd ed. Marcel Dekker, New York,
        1166pp. [IP]

Bardossy, A., L Borgardi, and W.E. Kelly. 1986. Geostatistical Analysis of Geoelectric Estimates for
        Specific Capacity. J. Hydrology 84:81-95.

Barker,  R.D.  1974. The Interpretation of Induced Polarization Sounding Curves in the Frequency
        Domain. Geophysical  Prospecting 22(4):610-626.

Barker,  R.D.  1975. A Note on the Induced Polarization of the Bunter Sandstone. Geoexploration
        13:227-234.

Barker, R.D. and P.P. Worthington.  1973. Some Hydrogeophysical Properties of the Bunter Sandstone of
       Northwest England. Geoexploration 11:151-170. [SRR, ER]

Barton,  GJ. 1984. Land Use and Temporal Effects on Shallow Earth Resistivity. In: NWWA/EPA Conf.
       on Surface and Borehole Geophysical Methods in Ground Water Investigations (1st, San Antonio
       TX), National Water Well Association, Dublin, OH, pp. 483-508. [ER]

Basokur, A.T. 1990. Microcomputer Program for the Direct Interpretation of Resistivity Sounding Data.
       Comp. and Geosci. 16(4):587-601.

Bays, C.A. 1946. Use of Electrical Geophysical Methods in Groundwater Supply. Illinois State
        Geological Survey Circular 122. [ER,  BH]

Bays, C.A. 1950.  Prospecting for Ground Water-Geophysical Methods. J. Am. Water Works Ass.
       42:947-956.  [ER]

Bays, C.A. and S.H. Folks. 1944. Developments in the Application of Geophysics to Ground Water
       Problems. Illinois State Geological Survey Circular 108. [ER, BH]

Beeson, S. and C.RC. Jones. 1988. The Combined  EMT/VES Geophysical Method for Siting Boreholes.
       Ground Water 26:54-63.

Benson, R.C.  1991. Remote Sensing and Geophysical Methods for Evaluation of Subsurface Conditions.
       In: Practical Handbook of Ground-Water Monitoring, D.M. Nielsen (cd), Lewis Publishers,
       Chelsea, MI, pp.  143-194. [GPR, EMI, TDEM, ER, SRR, SRL, GR, MAG, MD, BH]

Benson, R. C., R.A. Glaccum,  and M.R. Noel. 1984. Geophysical Techniques  for Sensing Buried Wastes
       and Waste Migration. EPA/600/7-84/064 (NTIS PB84-198449), 236 pp. Also published in 1982 in
       NWWA/EPA series by National Water Well Association, Dublin, OH. [EMI, ER, GPR, MAG,
       MD, SRR]

Benson, R. C., M.S.  Turner, W.D. Volgelsong, and P.P. Turner.  1985. Correlation Between Field
       Geophysical Measurements and Laboratory Water Sample Analysis. In: Conference on Surface
       and Borehole Geophysical Methods and Ground Water Investigations (2nd, Fort Worth, TX),
       National Water Well Association,  Dublin, OH, pp. 178-197. [EMI, ER]
                                             5-23

-------
 Benson, R. C., M. Turner, P. Turner, and W. Vogelsang. 1988. In Situ, Time Series Measurements for
        Long-Term Ground-Water Monitoring. In: Ground-Water Contamination: Field Methods, A.G.
        Collins and A.I. Johnson (eds.), ASTM STP 963, American Society for Testing and Materials,
        Philadelphia, PA, pp. 58-72. [EMI, ER]

 Berk, W.J. and B.S. Yare. 1977. An Integrated Approach to Delineating Contaminated Ground Water.
        Ground Water  15(2): 138-145. [ER]

 Bernard, J. and P. Valla. 1991. Groundwater Exploration in Fissured Media with Electrical and VLF
        Methods. Geoexploration 27:81-91.

 Berlin, J.  1968. Some Aspects of Induced Polarization (Time Domain).  Geophysical Prospecting 16:401-
        426.

 Bertin, J.  and J. Loeb.  1976. Experimental and Theoretical Aspects of Induced Polarization, 2 Volumes.
        Gebruder Borntraeger, Berlin.

 Bhattacharya,  P.K. and H.P. Patra.  1968. Direct Current Geoelectric Sounding—Principles  and
        Interpretation.  Elsevier,  New York,  135 pp.

 Biella, G., A. Lozei, and I. Tabacco. 1983. Experimental Study of Some Hydrogeophysical Properties of
        Unconsolidated Porous Media. Ground Water 21(6):741-751. [ER]

 Bisdorf, R.J. 1990. Geoelectrical Studies on the Panoche Fan Area of the San Joaquin Valley, California.
        In: Proc. of a U.S. Geological Survey Workshop on Environmental Geochemistry, B.R. Doe (ed.),
        U.S. Geological Survey Circular 1033, pp.  133-137. [ER]

 Bisdorf, R.J. and A.A.R. Zohdy.  1979. Geoelectrical Investigations with Schlumberger Soundings near
        Venice, Parrish and Homosassa, Florida. U.S. Geological Survey Open-File Report 79-841, 114
        pp.

 Bleil, D.F. 1953. Induced Polarization: A Method  of Geophysical Prospecting. Geophysics 18(3):636-661.

 Bodmer, R., S.H. Ward, and H.F. Morrison.  1968. On Induced Polarization and Groundwater.
        Geophysics  33(5):805-821.

 Bogoslovsky, V.V. and A.A. Ogilvy. 1970a. Applications of Geophysical Methods for Studying the
        Technical Status of Earth Dams. Geophysical Prospecting 18:758-773. [ER, SP, IP, SRR]

 Bogoslovsky, V.A. and A.A. Ogilvy. 1970b. Natural Potential Anomalies as a Qualitative Index of the
        Rate of Seepage from Water Reservoirs. Geophysics 18(2):261-268. [SP]

 Bogoslovsky, V.V. and  A.A. Ogilvy. 1972. The Study of Streaming Potentials on Fissured Media  Models.
        Geophysical Prospecting  20(4): 109-117.

Bogoslovsky, V.V. and A.A. Ogilvy. 1973. Deformation of Natural Electric Fields near Drainage
        Structures. Geophysical Prospecting 21(4):716-723. [SP]

Bogoslovsky, V.V. and A.A. Ogilvy. 1977. Magnetometric and Electrometric Methods for the
       Investigation of the Dynamics of Landslide Processes.  Geophysical Prospecting 25(3):280-291.
        [SP, MAG]
                                               3-24

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Borns, D.J. and S. Pickering.  1990. Enduser Quality Assurance Requirements for Geophysical Surveys: A
        Case Study Provided by a DC Grid at the Waste Isolation Pilot Plant. In: Proc.  (3rd) Symp. on
        the Application of Geophysics to Engineering and Environmental Problems, Sot. Eng. and
        Mineral Exploration Geophysicists, Golden,  CO, pp. 231-241.

Bottcher,  C.F. 1952. Electric Polarization. Elsevier, NY.

Bradley, M.W. 1986. Surface Geophysical Investigations at the North Hollywood Dump, Memphis,
        Tennessee. In: Proc. Focus Conf. on Southeastern Ground Water Issues (Tampa, FL), National
        Water Well Association, Dublin, OH, pp.  324-343. [EMI, ER]

Breusse, J.J. 1963. Modern Geophysical Methods for Subsurface Water Exploration.  Geophysics
        28(4): 633-65 7.  [ER]

Brickell, M.E. 1984. Geophysical Techniques to  Delineate a Contaminant Plume. In:  Proc. of the
        NWWA Tech. Division Eastern Regional Ground Water  Conference (Newton, MA), National
        Water Well Association, Dublin, OH, pp.  175-207. [EMI, ER, BH]

Bruehl, D.H. 1983. Use of Geophysical Techniques to Delineate Ground-Water Contamination. In:
        Proc. Third Nat. Symp. on Aquifer Restoration and Ground Water Monitoring, National Water
        Well Association, Dublin, OH, pp. 295-300. [ER, GR, SRR]

Bruehl, D.H. 1984a. Delineation of Ground Water Contamination by Electrical Resistivity Depth
        soundings. In: NWWA/EPA Conf. on Surface and Borehole Geophysical Methods in Ground
        Water Investigations (1st, San Antonio TX), National Water Well Association, Dublin, OH, pp.
        403-412. [ER]

Bruehl, D.H. 1984b. Use of Complementary Geophysical Techniques to Delineate Ground Water
        Contamination. In: Proc. of the NWWA Tech.  Division Eastern Regional Ground Water
        Conference (Newton, MA), National Water Well Association, Dublin, OH, pp. 265-273. [ER,
        SRR, GR]

Buhle, M.B. 1953. Earth Resistivity in Ground-Water Studies in  Illinois. Trans. Am. Inst. Mining Met.
        Eng., Petroleum Division 196(4): 1-5.

Buhle, M.B. and J.E. Brueckmann. 1964. Electrical Earth Resistivity Surveying in Illinois. Illinois State
        Geological Survey Circular 376. [ground water resource evaluation]

Burdick, R.G.  1982. Application of the Electrical Resistivity Method to Mining Problems. In: Premining
        Investigations for Hardrock Mining, U.S.  Bureau of Mines Information Circular 8891, pp. 29-35.
        [fault,  abandoned mine, and leachate detection]

Butler, O.K. and J.L. Llopis. 1985. Military Requirements for Geophysical Ground Water Detection and
        Exploration. In: Conference on Surface and Borehole Geophysical Methods and Ground Water
        Investigations (2nd, Fort Worth, TX), National Water Well Association, Dublin, OH, pp. 228-248.
        [EMI,  ER, SRR].

Carpenter, E.W. 1955.  Some Notes Concerning the Wenner Configuration. Geophysical Prospecting
        3:388-402.  [tri-potential resistivity]
                                               3-25

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 Carpenter, G.C. and D.R. Bassarab. 1964. Case Histories of Resistivity and Seismic Ground Water
        Studies. Ground Water 2(l):21-25.

 Carpenter, P.J.  1900. Landfill Assessment Using Electrical Resistivity and Seismic Refraction Techniques.
        In: Proc. (3rd) Symp. on the Application of Geophysics to Engineering and Environmental
        Problems, Sot. Eng. and  Mineral Exploration Geophysicists, Golden, CO, pp. 139-154.

 Carpenter, P.J., R.S. Kaufman, and B. Price. 1990a. Use of Resistivity Soundings to Determine Landfill
        Structure. Ground Water 28:569-575.

 Carpenter, P.J., M.C. Keeley, and R.S. Kaufman.  1990b. Azimuthal Resistivity, Soil Moisture, and
        Infiltration over a Fracture Glacial Till Landfill Cover (Abstract). Trans. Am. Geophys. Union
        71:519.

 Carpenter, P.J., S.F. Calkin, and  R.S. Kaufman. 1991. Assessing a Fractured Landfill Cover Using
        Electrical Resistivity and Seismic Refraction Techniques. Geophysics 56(11): 1896-1904.
        [Azimuthal  resistivity]

 Barrington, TJ. and D.A. Watson. 1981. " Preliminary Evaluation of an Alternate Electrode Array for Use
        in  Shallow Subsurface Electrical Resistivity Studies.  Ground Water 19(l):48-57.

 Cartwright, K. and M.R. McComas. 1968. Geophysical Surveys in the Vicinity of Sanitry  Landfills in
        Northeastern Illinois. Ground Water 6(5):23-30.  [ER, thermal]

 Chapman, MJ. and E.S.  Bair. 1992. Mapping a Brine Plume Using Surface Geophysical Methods in
        Conjunctions with Ground Water Quality Data. Ground Water 12(3):203-209.  [ER and EMI]

 Cherkauer, D.S. and R.W. Taylor.  1988. Geophysically Determined Ground Water Flow into the
        Channels Connecting Lakes Huron  and Erie. In: Proc. Second Nat. Outdoor Action Conf. on
        Aquifer Restoration, Ground Water Monitoring and Geophysical Methods, National Water Well
        Association, Dublin, OH, pp. 779-799. [ER, CSP]

 Cichowicz N.L., R.W. Pease,  Jr., P.J. Stellar, and H.J. Jaffe. 1981. Use of Remote Sensing Techniques  in
        a Systematic Investigation of an Uncontrolled Hazardous Waste Site. EPA/600/2-81/187 (NTIS
        PB82-103896). [ER, SRR,  GPR, MD]

Cleff, R. (cd.). 1991. An Evaluation of Soil Gas and Geophysical Techniques  for Detection of
        Hydrocarbons. API Publication No.  4509, American Petroleum Institute, Washington, DC. [GPR,
        EMI, ER, complex resistivity]

Coetsee, V.D.A., R. Meyer, C.D. Elphinstome, H. Bezuidenhout, and A. Watson. 1992. Hydraulic
        Aquifer Characteristics  Determined from Resistivity  Sounding Parameters Using Empirical
        Formulae and Geostatistical Techniques. In SAGEEP '92, Society  of Engineering and Mineral
        Exploration  Geophysicists, Golden, CO, pp. 291-308.

Collette, L.S. and TJ. Katsube. 1973.  Electrical Parameters of Rocks  in Developing Geophysical
        Techniques. Geophysics 38(1):76-91.

Cook, K.L. and R.G. VanNostrand. 1954. Interpretations of Resistivity Data over Filled Sinks.
        Geophysics  19(4):761-790.
                                              3-26

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Cook, P. G, G.R. Walter, G. Buselli, I. Potts, and A.R. Dodds. 1992. The Application of Electromagnetic
        Techniques to Groundwater Recharge Investigations. J. Hydrology 130:201-229. [ER, EM I,
        TDEM]

Corwin, R.F. 1986. Electrical Resistivity and Self-Potential Monitoring for Ground Water Contamination.
        In: Proc. Surface and Borehole Geophysical Methods  and Ground Water Instrumentation Conf.
        and Exp., National Water Well Association, Dublin, OH, pp. 203-214.

Corwin, R.F. 1990. Applications of the Self-Potential Method for Engineering and Environmental
        Investigations. In: Proc. (3rd) Symp. on the Application of Geophysics to Engineering and
        Environmental Problems, Soc. Eng. and Mineral Exploration Geophysicists, Golden, CO, pp. 107-
        122.

Darilek, G.T and J.O. Parra. 1988a.  The  Electrical Leak Location Methods for Geomembrane Liners.
        In: Proc. 14th Research Symp. (Land Disposal, Remedial Action, Incineration and Treatment of
        Hazardous  Waste), EPA/600/9-88/021 (PB89-174403), pp. 167-176.

Darilek, G.T. and J.O. Parra.  1998b. The Electrical Leak Location Method for Geomembrane Liners.
        EPA/600/2-88/035 (NTIS PB88-220496).

Darilek, G.T. and D.L. Laine. 1989.  Understanding Electrical  Leak  Location Surveys of Geomembrane
        Liners and Avoiding Specification Pitfalls. In: Superfund '89, Proceedings of the 10th Annual
        Conference, Hazardous Material Control Research Institute,  Silver Spring, MD, pp. 56-66.

Davis, P. A. 1979. Interpretation of Resistivity Sounding Data:  Computer Programs for Solutions to the
        Forward and Inverse Problems. Minnesota Geological  Survey Information Circular  17.

Denne, J.E., et al. 1984. Remote Sensing and Geophysical Investigations of Glacial Buried Valleys in
        Northeastern Kansas.  Ground Water 22(l):56-65. [ER, GR, SRR, thermal]

Dudley, Jr., W.W. and L.D. McGinnis.  1962. Seismic Refraction and Earth Resistivity Investigation of
        Hydrogeologic Problems in the Humboldt River Basin, Nevada. Desert Research Institute
        Technical Report 1, University of Nevada, Las Vegas, NV, 29 pp.

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Zohdy, A.A.R. 1974a. A Computer Program for the Automatic Interpretation of Schlumberger Sounding
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Zohdy, A.A.R. 1975. Automatic Interpretation of Schlumberger Sounding Curves, Using Modified Dar
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Zohdy, A.A.R. 1988. Ground-water Exploration with Schlumberger Soundings near Jean, Nevada. U.S.
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Zohdy, A.A.R. 1989. A New Method for the Automatic Interpretation of Schlumberger and Wenner
        Sounding Curves.  Geophysics 54(2):245-253.

Zohdy, A.A.R. and R.J. Bisdorf. 1975.  Computer Programs for the Forward Calculation and Automatic
        Inversion of Werner Sounding Curves. NTIS PB-247265/AS.

Zohdy, A.A.R. and D.B. Jackson.  1969. Application of Deep Electrical Soundings for Ground-Water
       Exploration  in Hawaii.  Geophysics 34(4):584-600.

Zohdy, A.A., G.P. Eaton, and D.R. Mabey. 1974. Application of  Surface Geophysics to Ground-Water
       Investigations. U.S. Geological Survey Techniques of Water-Resource Investigations TWRI 2-D1,
        116pp. [ER, GR,  MAG, SRR]

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       Polarization. Geophysical Prospecting 20:626-648.
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                                          CHAPTER 4
                 SURFACE GEOPHYSICS: ELECTROMAGNETIC METHODS
        Electromagnetic measurements can  be made in either  the  frequency  domain  or  the  time
domain.  (See Section 3.1 for a discussion of general characteristics  of electromagnetic methods.)
Frequency  domain  geophysical  measurements  sense  the  subsurface response  to  sinusoidal
electromagnetic  fields at  one or more transmitted  frequencies.  Time  domain geophysical
measurements record the  change in  response as  time  passes  after a transmitted  signal has been
abruptly turned  off.  The term  electromagnetic induction  (EMI)  usually  indicates use of
frequency  domain measurements.   Time  domain  electromagnetic (TDEM)  measurements,  called
transient electromagnetic  (TEM)  soundings, also  involve electromagnetic  induction. Although
the use  of  TDEM methods  at contaminated  sites is a relatively recent  development,  they  are  far
superior to  EMI measurements  in  providing  vertical  resolution of soundings (see Section  4.2).
The  electrical method of induced polarization also  can be used in either the time or  the
frequency domain (Section  3.5).

        Frequency domain electromagnetic induction (EMI-Section  4.1) is the  most commonly
used  surface geophysical  method for  detection  of conductive  contaminant plumes. Time  domain
electromagnetics (Section 4.2)  has gained increasing  popularity  in ground-water  studies,
especially for the detection  of freshwater-saltwater interfaces  and saltwater intrusion  because  of
its higher resolution and greater  depth of penetration. Other  major types  of electromagnetic
methods include  metal detection (using  EMI instruments  designed specifically to detect buried
metals-Section 4.3);  very low frequency (VLF) resistivity (Section 4.4); and various
magnetotelluric  methods (Section 4.5).  Metal detectors  are  commonly used  at  contaminated
sites where  buried pipelines  and metallic wastes are known or suspected, and VLF resistivity is
the next most frequently  used  EM method after electromagnetic  induction  for detection  of
conductive  contaminant plumes.
                                             4-1

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 4.1  Frequency Domain  Electromagnetic Induction (EMI)

        Electromagnetic  induction  methods  (generally  abbreviated  as EM,  although this
 abbreviation  also  is used specifically  for  frequency domain  EM measurements) measure
 subsurface  electrical conductivities  by  low-frequency electromagnetic induction (Benson et al,
 1984).  Table  4-1  identifies general references  on  electromagnetic  induction  methods. Often  the
 term terrain conductivity is  used to  refer  to  measurements made using EMI methods. Electrical
 conductivity is  a function of the type of soil and rock, its porosity, degree  of  connectivity, degree
 of saturation, and the  electrochemistry  of the fluids that  fill  the  pore space.  In most  cases, the
 electrical conductivity  (measured  as millimhos  per meter, or, more recently,  milliSiemens  per
 meter,  mS/M) of the  pore fluids will  dominate the measurement. Also, dissolved species  in
 contaminated water will  alter  its conductance compared  to  the  natural ground water.
 Consequently, EM  is  an excellent  technique  for  mapping contaminant  plume  boundaries, as well
 as  a variety  of other  subsurface  features with  contrasting electrical properties.

        EMI  equipment  used in ground-water contamination  studies  differs  from  the  wide  variety
 of EM equipment used  in mineral  exploration in that  it  is usually  designed and calibrated  to  read
 directly  in  units  of apparent conductivity.  Figure  4-la  shows the basic principle  of operation:  A
 transmitter  coil generates  a  sinusoidal  electromagnetic  field  that  induces  eddy  currents in the
 earth below the  instrument.  A receiver coil then  intercepts  both the primary  and the  secondary
 electromagnetic fields  created  by  the  eddy current loops  and produces  an  output  voltage  that  is
 corrected for the  primary  field and the loop  geometry and spacing.  This  voltage, within limits, is
 linearly  related to  subsurface  conductivity.  The reading  represents  the  weighted  cumulative sum
 of the conductivity variations  from  the  surface  to  the  effective  depth of the instrument.

        The effective depth for EMI is  determined by  the geometry  and spacing of the
 transmitting  and receiving coils (Figure 4-lb), with 60  meters representing  a  typical maximum
 depth. Readings  to shallow depths  can  be  made continuously since the  coils  are rigidly
 connected,  whereas greater  depth  penetration requires  stationary measurements (see  Figure 1-3).
 Benson et al. (1984) is  a useful  source of additional introductory information  about this method;
Nabighian (1988,  1991)  provides  more  detailed  information.  Section 1.3.1  in  U.S.  EPA (1993)
 summarizes advantages and disadvantages  of EMI. In the  last 10 years EMI  probably  has  been
                                               4-2

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                                                                 Secondary Fields
                                                                From Current Loops
                                                                    Sensed by
                                                                   Receiver Coil
Figure 4-la Electromagnetic induction: block diagram showing EMI principle of operations
             (adapted from Benson et al., 1984).
                               60 Meters
Figure 4-lb Electromagnetic induction: the depth of EMI soundings is dependent upon coil spacing
             and orientation selected ( from Benson et al., 1984).
                                      4-3

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 used more  than any  other  geophysical  method  to  map  conductive contaminant plumes (Tables 4-
 2;  see  also  Table  A-l).

        Table 4-1  identifies literature  in which  EMI  and electrical resistivity methods  have been
 compared. Rehm et al.  (1985)  reviewed  literature  reporting  the  success  of DC methods  and
 EMI in meeting objectives  for  hydrogeologic investigations.  While both  methods show a  high
 success rate in  meeting  objectives, DC  resistivity was unsuccessful more  often than  EMI  (6 out
 24  cases  for DC resistivity  compared to  1 out of 18  cases for EMI).
4.2  Time Domain Electromagnetic  (TDEM)

        Recent  developments  in  time  domain  electromagnetic  instrumentation  (also  called
transient  EM)  with resolution  capabilities in the shallow  (<100 m) subsurface combines some of
the best  features  of DC  methods  and  EMI. In TDEM, a square,  single-turn  transmitter loop (of
side length typically 10 to 20 m)  is laid on the ground with the receiver  coil nearby (Figure 4-2a).
The transmitter initially causes a  steady  current to flow in the loop. This current is  suddenly
terminated, causing an essentially  circular eddy  current ring to flow at successively greater  depths
as  shown  in Figure 4-2b.  Measurement of the decaying magnetic  field from this descending eddy
current yields  data that can be interpreted  in  terms  of the terrain  resistivity as a function of
depth. Thus the TDEM  technique is  useful  for  geoelectric sounding.  Depth of exploration is
determined by the dipole moment of the transmitter (product of current  times area);  the  time of
measurement of the decaying magnetic  field;  and the orientation,  geometry, and  spacing of the
loops.

        TDEM measurements have been  used increasingly  in  the  last decade  for  ground-water
studies  (Table  4-3), since the  speed  of operation, lateral  resolution, and  resolution of electrical
equivalence (the situation where more  than  one layered earth  model  will  fit the  measured  data  to
within the experimental error)  are in  general  very good.  Because the mathematics involved in
the computer programs for analyzing  TDEM measurement are more  complicated than  DC
methods,  however, erroneous interpretation  is  more  likely, especially if nongeophysicists  are using
                                              4-4

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                Single-Turn
                   Coil
                Induced
              Current Loop
                                             Second Field From Current Loop
                                                Sensed by Receiver Coil
 Figure 4-2a Time domain electromagnetic: block diagram showing IDEM principles of operation.
Figure 4-2b Time domain electromagnetics:  the depth of IDEM soundings depends on transmitter
              current, loop size, and time of measurement.
                                     4-5

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 the  programs.  Surface  features  can pose  difficulties  for placing the transmitter  loop,  and  IDEM
 is less suitable for especially shallow  applications (less than  150 m).
 4.3  Metal  Detection

        Metal  detectors  operate  on the  same  principles as  electromagnetic  induction, except  that
 the  instruments  are  specifically  designed to sense  increased conductivity  resulting from  either
 ferrous or  nonferrous  metals near  the  ground  surface.  The  many different  types  of metal
 detectors  available  fall  into  three  main classes: pipeline/cable  locators, conventional "treasure
 hunter" detectors,  and  specialized detectors. The first  two  types  are  usually  handheld and
 require one person  to  operate.  Specialized  detectors are  designed for  complex  conditions  and
 often  require two  operators,  unless  the device  is truck-mounted.

        The advantage of metal  detectors is that they can sense  nonferrous  metals such  as
 aluminum  and  copper,  which cannot  be detected with magnetometers.  Their detection  range  is
 limited, however: up to  3 meters for single drums  and 6  meters for large piles of metallic
 material.  Section 1.3.3  in U.S.  EPA (1993) summarizes  advantages and disadvantages of  metal
 detectors, and Benson et al.  (1984) provide more detailed  information on the use of metal
 detectors. Table  4-3 identifies a number of references  concerning the  use of metal  detection  or
 providing a discussion  of the method  in relation to investigations of  contaminated sites.
4.4 Very Low  Frequency  Resistivity

        Very  low frequency  (VLF)  resistivity instruments measure the ratio  of electrical  to
magnetic  fields generated  by military communication  transmitters (around  15  to 25  kHz).  The
term very  low frequency is somewhat confusing since, although the radio waves are indeed  of a
very low frequency, they are often of higher than  those  used in EM induction  methods. The
distribution of transmitting  stations, their high  power,  and  effects created by  the  ionosphere
produce  worldwide  coverage  of VLF transmissions (Stewart  and  Bretnall,  1986).
                                              4-6

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        The  depth of penetration  of these  waves  is related to  the  resistivity of the subsurface
materials.  The  depth of  penetration for contaminant  plumes  (around  30 ohm-m)  is  around  20
meters, with penetration typically  35 to 60  meters in saturated  overburden with  higher  resistivities
(100 to 300 ohm-m) (Greenhouse  and  Harris,  1983).

        Resistivity and  phase  angle  (between  the  electric  and magnetic fields) measurements are
taken  using  electrodes  driven  into  the  ground  at  10  meters apart.  The  principles of data
interpretation are  similar to those  used in  magnetotelluric methods.

        An advantage of  VLF  measurements over  EM and DC resistivity methods  is that the
remote transmitter is supplied  free  of charge  and does not have  to be carried by the survey  crew.
Although  the  measurement requires ground  contact,  only  potential  electrodes  are  employed,
minimizing  contact  resistance  problems. Given that potential  electrodes  are  used,  static  effect
problems  (see below in relation to CSAMT)  are  a limitation associated with VLF  resistivity;
however,  the ease of taking measurements allows  a high spatial density, which helps minimize
this  effect. Since  only  two  quantities  are  measured,  resolving a  two-layered  earth  requires  that
the resistivity  of one of the layers be  known or assumed. Another  disadvantage  is that
measurements  must  be  adjusted  to account for differences in  surface  elevation before  readings in
sloping terrain  can be  compared.  Where  contaminant plumes are  relatively shallow,  VLF is an
excellent  method for investigating  contaminated sites;  as a result,  it is the  second most commonly
used  electromagnetic  method  for  such  applications after EMI  (Table  4-3).
4.5  Magnetotelluric  Methods

        Telluric currents  are  natural  electric  currents that flow  in  the  subsurface  in response to
ionospheric tidal  effects  and  lightning  associated  with  thunderstorms. Magnetotelluric  (MT)
geophysical methods involve  the  measurement of magnetic  and  electric fields associated  with  the
flow of telluric currents  (Cagniard,  1953).  As noted in Table 1-3,  a variety of MT methods have
been  developed audiofrequency MT  (AMT)  is  the  same as MT,  except  that audio frequencies
are measured;  audio frequency  magnetic (AFMAG) methods measure the tilt angle of the  total
magnetic  field  on surface or  in the  air;  and MT  array profiling (EMAP)  is  MT enhanced with
                                              4-7

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numerous  measurements of the  surface  electric  field to  try to  reduce errors  attributable  to  static
effects  resulting from localized  changes in  conductivity  of  near-surface materials.

        The  main  advantage  of MT  methods is  that they can  reach depths far greater  than can be
reached  effectively using artificially induced currents. This  is  not particularly an advantage for
site-specific  investigations, although  Strangway  et  al. (1980) reported  on the  use of  shallow
applications  that  might  have  some  value  in near-surface ground-water  investigations.  Table 4-3
identifies a  number general  references on MT  methods.  U.S.  Geological  Survey (1980)  provides
a brief discussion of potential  applications for hydrogeologic  studies.

        Magnetotelluric  principles are  also involved  in  two  EM methods using  artificial  sources:
controlled-source  audiomagnetotellurics  (CSAMT) and  VLF resistivity.  CSAMT uses  a  remote
transmitter combined  with an  AMT receiver.  Use of CSAMT  to  detect  brine  contamination and
for characterizing  aquifers in fractured bedrock  has been reported on a number of  times  (Table
4-3).  Although  attractive in theory, the static effect errors that  plague MT surveys  are  also  a
source of  error in CSAMT.  In  general, most other electrical  and  EM methods  are  more
accurate  and  easier to use for  shallow investigations.
                                              4-8

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Table 4-1 Index to General References on Electromagnetic Induction Methods
Topic
References
Texts
Basic EM Theory


EM Wave Behavior



Review Papers


Data Analysis



Rock Conductivity


Nonconventional EMI


EMI/ER Comparisons
Hoyt (1974), Kaufman and Keller (1983), Kraus (1984), Nabighian (1988,
 1991), Rokityanksi (1982), Verma (1982-three-layer interpretation data),
Wait (1971, 1982); see also Table 1-4 for identification of general
geophysics texts covering electromagnetic methods

Jackson (1975), Kong (1975), Nabighian (1988),  Stratton  (1941), Wait
(1985), Ward (1967a)

Chew (1990), Jordon (1963), Kong (1975), Lorrain and Carson (1970),
McNeill (1990), Schelnukoff (1943), Wait (1970,  1981, 1985), Ward and
Morrison (1971)

Bosschart (1970), Duran (1984-interferences), Lord and  Koerner (1982),
Ward (1967b, 1980),  McNeil (1980b), Swift (1988)

Boutwell and Lawrence (1988), Kufs et al. (1986), Lowrie and West
(1965), Shope (1987), Spies and Eggers (1986), Vogelsang (1974-EM vs.
IP), Wait (1962), Weber and Flatman (1986a,b), Wilt and Stark (1982)

McNeill (1980a), Pfannkuch (1969); see also listing for references on
subsurface electrical properties  in Table 3-1

Beeson and Jones (1988), Goldman (1990), Johnson and Doborzynski
(1988), Steinberg (1991), Steinberg  et al. (1991)

Adams et al. (1988),  Allen (1985), Allen et al. (1985), Benson et al.
(1985, 1988), Bradley (1986), Brickell (1984), Butler and Llopis (1985),
Cameron et al. (1981), Ehrlich and Rosen (1987), Emilsson and
Wroblewski (1988), Evans and Schweitzer (1984), Fox and Gould (1984),
Gilkeson and Cartwright (1982), Gilmer and Helbling (1984), Greenhouse
and Harris (1983), Greenhouse et al. (1985), Jansen and Taylor (1989),
Kelly et al. (1989), Knuth (1988), LeBrecque et al. (1984), Noel et al.
(1982), Petersen et al. (1986),  Pitchford et  al. (1988), Roberts et al.
(1989), Rodriquez (1984), Rudy and Caoile (1984), Rumbaugh et al.
(1987), Russell (1990), Saunders and Stanford (1984), Stierman and
Ruedisili (1988), Sweeney (1984), Tueci (1986), Vogelsang (1974),
Walther et al. (1983), White and Brandwein (1982),  White et al. (1984),
Williams et al. (1984), Windschauer (1986), Woessner et al.  (1989)
                                         4-9

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Table 4-2 Index to References on Applications of Electromagnetic Induction Methoda
Topic
References
Applications at Contaminated Sites
Reports
Reviews
Ground-Water
Quality  Monitoring

Contaminated  Sites
Contaminant Plumes
Landfill Leachate
Buried Containers/Waste
Soil salinity  Mapping
Benson et al. (1984), EC&T et al. (1990), Pitchford et al. (1988), U.S.
EPA (1987)

Benson et al. (1982, 1991), Evans and Scwheitzer (1984), Fowler and
Ayubcha (1986), Patra (1970), Pitchford et al. (1988), Saunder et al.
(1991), White et al. (1984), Williams et al. (1984)

Benson et al. (1985, 1988), Gilkeson and Cartwright (1982), Noel et al.
(1982), Medlin and Knuth (1986)

Adams et al. (1988), Barlow and Ryan (1985), Barton and  Ivanhenko
(1990), Bradley (1986),  Carr et al. (1990), Cox and  Saunders (1990),
Duran and Haeni (1982), Feld et al. (1983), Fowler and Pasicznyk (1985),
Fox and  Gould (1984), Gilmer and Helbling (1984), Glaccum et al.
(1982), Greenhouse and Slaine (1982, 1983, 1986), Hall and Pasicznyk
(1987), Hankins et al. (1991), Knuth (1988-oil brine), Kufs et al. (1986),
Lawrence (1984),  Mills et al.  (1987),  Morgenstern and Syverson
(1988a,b), Ringstand and  Bugenig  (1984), Roberts et al. (1989),
Rodriguez (1984), Saunders and Cox (1987), Saunders and Stanford
(1984), Scholl et al. (1984), Schutts and Nichols  (1991), Slaine and
Greenhouse (1982), Stierman and Ruedisili (1988), Walther et al. (1983),
Weber and Flatman (1986a,b), White and Gainer (1985)

Brickell (1986), Emilsson and Wroblewski (1988), Greenhouse et al.
(1985), LeBrecque et al. (1984), Mack and Maus (1986), McNeil (1982),
Primeaux (1984, 1985), Rinaldo-Lee and Wagner (1985), Weber et al.
(1984)

Allen (1984), Ehrlich and Rosen (1987), Grady and Haeni  (1984),
Greenhouse and Harris  (1983), Jansen et al.  (1992), Kerfoot and Rumba
(1985), McQuown  et al. (1991), Roberts et al. (1989), Rudy and Caoile
(1984), Rumbaugh  et al.  (1987), Russell (1990),  Shope (1987), Stenson
(1988), Sweeney (1984)

Allen and Seelen (1992), Jordan et al. (1991), Lord and Koerner (1986,
1987a,b), Lord et al. (1982), Merin (1989-USTs), Rudy and Warner
(1986-USTs), Schutts and Nichols (1991), Struttmann and Anderson
(1989), Walsh (1989)

Cameron et al. (1981), Corwin and Rhoades (1982,  1984),  de Jong et al.
(1979), Rhoades and Corwin (1981), Rhoades and Oster (1986), Williams
and Baker (1982)
                                       4-10

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                                         Table 4-2 (cont.)
Topic
References
Abdications at Contaminated Sites fcont.')
Miscellaneous
Ground-Water Applications

Ground-Water Texts

Reviews

Case Studies
Soil Quality

Hydraulic Conductivity

Recharge

Other Applications

Abandoned Mines

Abandoned Wells

Bedrock  Topography

Geologic Structure

Fracture/Faulted Rock
Hydrocarbons: Davis (1991), Saunders and Cox (1987),  Saunders and
Germeroth (1985), Valentine and Kwader (1985,  1986); Acid Mine
Drainage:  Ladwig (1983.1984): Spray Irrigation Leachate: Allen et al.
(1985); Brine/Salt Water: Chapman and Bair (1992),  Lyverse (1989),
Stewart (1982); Uranium Mill Tailings: Wightman et  al.  (1992)
U.S. Geological Survey (1980), Redwine et al. (1985), Rehm et al. (1985)

Benson (1991), McNeill (1988, 1991)

Arcone (1979), Butler and Llopis (1985), Drew et al. (1985), Duran
(1987), Fitterman et al.  (1991), Haeni (1986), Hoekstra (1978-
permafrost), Hoekstra and Standish (1984), Jansen (1991), Kelly et al.
(1989), Kachonoski et al. (1988), Koefoed and Biewinga (1976), Palacky
et al. (1981), Payne (1991), Tucci (1986), Windschauer (1986), Woessner
et al. (1989)

McBride et al. (1990)

Taylor and Cherkauer (1984)

Cook et al. (1992)
Friedel et al. (1990)

Aller (1984)

Ghatge and Pasicznyk (1986)

Telford et al.  (1977)

Adams et al. (1988), Jansen (1990), Jansen and Taylor (1988),
Morgenstern and Syverson (1988a,b)
                                         4-11

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Table 4-3 Index to References on TDEM, VLF Resistivity, Metal Detection, and Magnetotelluric Methods
Topic
References
TDEM

Texts

Review  Papers


Ground-Water Studies
Contaminated  Sites

Fresh-Salt Water
Interface/Intrustion
Brine Contamination

VLF  Resistivity

General


Contaminated  Sites
Ground Water

Fracture Detection


Geology

Weathered Zone
Felsen (1976), Kaufman and Keller (1983), Goldman (1990)

Kuo and Cho (1980), Nabighian and Macnae (1991), Strangway (1960-
scale  modeling)

Cook et al. (1992), Fitterman (1986, 1987), Fitterman and Stewart (1986),
Fitterman  et al. (1991), James et al. (1990), Hoekstra and Standish
(1984), Hoekstra and Blohm (1990), Hoekstra and Cline (1986), Taylor et
al. (1991), Taylor et al. (1992), Watson et al. (1990)

Benson (1991), Hoekstra et al. (1992), Saunders et al. (1991)

Fitterman  and Hoekstra (1984), Goldman et al. (1991), Hoekstra and
Evans (1986), Hoekstra (1990), Hoekstra and Blohm (1990), Hoekstra et
al. (1992), Maimone et al. (1989), Mills et al. (1987, 1988), Snow et al.
(1990), Stewart and Gay (1986)

Frischknecht (1990), Raab  and Frischknecht  (1985)
Lankston and Hecker (1988), McNeill and Labson (1991), Paterson and
Ronka (1971)

Carr et al. (1990), Fitzgerald et al (1986), Grady and Haeni (1984),
Greenhouse and Harris (1983), Greenhouse and Slaine (1983), Jansen
and Taylor (1989), Koerner et al. (1982-buried containers), Meyer et al.
(1990), Rodriguez (1984), Russell (1990), Slaine and Greenhouse (1982),
Slaine et al. (1984), Stewart and Bretnall (1984, 1986)

Bernard and Valla (1991), Jansen and Taylor (1989), Watson et al.  (1990)

Bernard and Valla (1991), HRB Singer (1971-abandoned mines),  Jansen
and Taylor (1988,  1989),  Sinha (1989)

Telford et al.  (1977-structure), Wynn (1979-buried paleochannel)

Poddar and Rather (1983)
                                          4-12

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                                         Table 4-3 (cont.)
Topic
References
Metal Detection

Contaminated  Sites
Magnetotelluric Methods

Texts


Review Papers

Telluric Currents (TC)


Magnetotellurics  (MT)
Audiomagnetotellurics
(AMT)
Controlled-Source
Audiomagnetotellurics
(CSAMT)
Aller (1984), Benson et al. (1984, 1991), EC&T et al. (1990), Evans and
Schweitzer (1984), Gilkeson et al. (1992), Koerner et al. (1982), Kufs et
al. (1986), Lord and Koerner (1986, 1987a,b), Pease and James (1981),
Pitchford et al. (1988), Westphalen and Rice (1992)
Kaufman and Keller (1981), Porstendorfer (1975), Vozoff (1986), Wait
(1982)

Strangway and Vozoff (1970), USGS (1980-TC, MT, AMT)

Alvarez (1991), Garland (1960), Pierce and Hoover (1986), U.S.
Geological Survey (1980)

Cagniard (1953), Strangway (1960), Vozoff (1991),  Ward (1980), U.S.
Geological Survey (1980)
Adams et al. (1971), Strangway (1983), Strangway et al. (1973, 1980);
Ground Water: Bazinet and Legault (1986), Pierce and Hoover (1986),
U.S. Geological Survey (1980)
Zonge (1990), Zonge and Hughes (1991); Brine Contamination: Bartel
(1989), Syed et al. (1985), Tinlin et al. (1988): Fractured Bedrock
Aquifers: Llnria. (1990), West and Ward (1988); In Situ MininpT eadiate:
Tweeton et al. (1991)
                                         4-13

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 4.6  References

 See Glossary for meaning of method abbreviations.

 Adams, M.L., M.S. Turner, and M.T. Morrow.  1988. The Use of Surface and Downhole Geophysical
        Techniques to Characterize Flow in a Fracture Bedrock Aquifer System. In: Proc. 2nd Nat.
        Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH, pp. 825-847. [EMI, ER, SRR, BH]

 Adams, W.M., F.L. Peterson, S.P. Mathur, L.K Lepley,  C. Warren, and RD. Huber. 1971. A
        Hydrogeophysical Survey Using Remote-Sensing Methods from Kawaihae to Kailua-Kona,  Hawaii.
        Ground Water  9(1):42-50. [ER, AMT, aerial thermal infrared, aeromagnetic]

 Allen, R.P. 1984. Electrical Resistivity Surveys Used to Trace Leachate in Ground Water from Paper
        Mill Landfill. In: Proc. of the NWWA Tech. Division Eastern Regional Ground Water
        Conference (Newton, MA), National Water Well Association, Dublin, OH, pp. 167-174.  [EMI,
        ER]

 Allen, R.P. and M.A. Seelen. 1992. The Use of Geophysics in the Detection of Buried Toxic Agents at a
        U.S. Military Installation. In: Current Practices in Ground Water and Vadose Zone
        Investigations, ASTM STP 1118, D.M. Nielsen and M.N. Sara (eds.), American Society for  Testing
        and Materials, Philadelphia, PA, pp. 59-68. [MAG, EMI, GPR]

 Allen, R. P., R. Popma, and P. Doolen. 1985. Electrical Resistivity/Terrain Conductivity Surveys to Trace
        Process Wastewater  Leachate in Ground Water from a Spray Irrigation System. In: Proc. of the
        AGWSE Eastern Regional Ground Water Conference (Portland, ME), National Water Well
        Association, Dublin,  OH, pp. 243-251. [EMI, ER]

 Aller, L. 1984. Methods for  Determining the Location of Abandoned Wells. EPA/600/2-83/123  (NTIS
        PB84-141530), 130 pp. Also published in NWWA/EPA Series, National Water Well Association,
        Dublin, OH. [air photos, color/thermal IR,  ER, EMI, GPR, MD, MAG, combustible gas
        detectors]

Alvarez, R. 1991. Geophysical Determination of Buried  Geological Structures and Their Influence on
        Aquifer Characteristics. Geoexploration 27:1-24.  [tellurics, gravity]

Arcone, S.A.  1979. Detection of Arctic Water Supplies with Geophysical Techniques. U.S. Army Cold
        Regions Research and Engineering Lab Report 79-15, Hanover NH. [EMI]

Barlow, P.M. and B.J. Ryan. 1985.  An Electromagnetic Method for Delineating Ground-Water
        Contamination, Wood River Junction, Rhode Island. U.S. Geological Survey Water-Supply Paper
        2270, pp. 35-49.

Bartel, L.C.  1989. Delineation of Brine Drilling-Fluid Loss in an Unsaturated Zone-Application to
        Contamination Monitoring. In: Proc. Third Nat.  Outdoor Action Conf. on Aquifer Restoration,
        Ground Water Monitoring and Geophysical Methods, National Water Well Association, Dublin,
        OH, pp.  841-854. [CSAMT]

Barton,  G.J. and T. Ivanhenko. 1991.  Electromagnetic Terrain Conductivity and Ground Penetrating
        Radar Investigations  at and near the CIBA-GEIGY Superfund Site, Ocean County, New Jersey:
        Quality Control Assurance Plan and Results. In:  Proc. (4th) Symp.  on the Application of
                                             4-14

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        Geophysics to Engineering and Environmental Problems, Soc.  Eng. and Mineral Exploration
        Geophysicists, Golden, CO, pp. 357-360.

Bazinet, R. and J.M. Legault. 1986. Prospecting to Ground Water with Scalar Audio Magnetotellurics.
        In: Proc. Surface and Borehole Geophysical Methods and Ground Water Instrumentation Conf.
        and Exp., National Water Well Association, Dublin, OH, pp. 295-314. [AMI]

Beeson, S. and C.R.C. Jones. 1988. The Combined EMT/VES Geophysical Method for Siting Boreholes.
        Ground Water 26:54-63.

Benson R.C. 1991. Remote Sensing and Geophysical Methods for Evaluation of Subsurface Conditions.
        In: Practical Handbook of Ground-Water Monitoring, D.M. Nielsen (cd), Lewis Publishers,
        Chelsea, MI, pp. 143-194.  [GPR, EMI, IDEM, ER, SRR, SRL, GR, MAG, MD, BH]

Benson, R., R. Glaccum, and P. Beam.  1981. Minimizing Cost and Risk in Hazardous Waste Site
        Investigations Using Geophysics. In: Proc. (2nd) Nat. Conf. on Management of Uncontrolled
        Hazardous Waste Sites, Hazardous Materials Control Research Institute, Silver Spring, MD, pp.
        84-88.  [EMI]

Benson, R.C., R.A. Glaccum, and M.R. Noel.  1984. Geophysical Techniques for Sensing Buried Wastes
        and Waste Migration. EPA/600/7-84/064 (NTIS PB84-198449), 236 pp.  Also published in 1982 in
       NWWA/EPA series by National Water Well Association, Dublin, OH. [EMI, ER, GPR,  MAG,
        MD, SRR]

Benson, R.C., M.S. Turner, W.D. Volgelsong, and P.P. Turner. 1985.  Correlation Between Field
        Geophysical Measurements and Laboratory Water Sample Analysis. In:  Conference on Surface
        and Borehole Geophysical  Methods and Ground Water Investigations (2nd, Fort Worth, TX),
       National Water Well Association, Dublin, OH, pp.  178-197. [EMI, ER]

Benson, R. C., M. Turner, P. Turner, and W. Vogelsong. 1988. In Situ, Time Series Measurements for
        Long-Term Ground-Water  Monitoring. In: Ground-Water Contamination: Field Methods, A.G.
        Collins and A.I. Johnson (eds.), ASTM STP 963, American Society for Testing and Materials,
        Philadelphia, PA, pp. 58-72. [EMI, ER]

Bernard, J. and P. Valla. 1991.  Groundwater Exploration in Fissured Media with Electrical and VLF
        Methods. Geoexploration 27:81-91.

Bosschart, R.A. 1970. Ground Electromagnetic Methods. In:  Mining and Groundwater Geophysics/1967,
       L.W. Merely (cd), Geological Survey of Canada Economic Geology Report 26, pp. 67-80.

Boutwell, G.P. and T.A. Lawrence.  1988. Electromagnetic Data Interpretation Using Multivariate  Least-
        Square Regression. In: Proc. of the Focus Conf. on Eastern Regional Ground Water Issues
        (Stanford, CT), National Water Well Association, Dublin, OH, pp. 3-20.  [EMI]

Bradley, M.W. 1986. Surface Geophysical Investigations at the North Hollywood Dump, Memphis,
       Tennessee. In: Proc. Focus Conf. on southeastern Ground Water Issues (Tampa, FL), National
       Water Well Association, Dublin, OH, pp. 324-343. [EMI, ER]

Brickell, M.E.  1984. Geophysical Techniques to Delineate a Contaminant Plume.  In: Proc. of the
       NWWA Tech. Division Eastern Regional Ground Water Conference (Newton,  MA), National
       Water Well Association, Dublin, OH, pp. 175-207. [EMI, ER, BH]
                                            4-15

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Butler, D.K. and J.L. Llopis.  1985. Military Requirements for Geophysical Ground Water Detection and
        Exploration. In: Conference on Surface and Borehole Geophysical Methods and Ground Water
        Investigations (2nd, Fort Worth, TX), National Water Well Association, Dublin, OH, pp. 228-248.
        [EMI, ER, SRR].

Cagniard, L.  1953. Basic Theory of the Magnetotelluric Method of Geophysical Prospecting. Geophysics
        18(3):605-635.

Cameron, D.R., E. DeJong, D.W.L. Read, and M. Oosterveld. 1981. Mapping Salinity Using Resistivity
        and Electromagnetic Inductive Techniques. Canadian J. Soil Science 61:67-78.

Carr, III, J. L., C.S. Ulmer, C.K. Eger, and P. Mann. 1990. Delineation of a Suspected Drum and
        Hazardous Waste Disposal  Site Utilizing Multiple Geophysical Methods: Shaver's Farm,
        Chickmauga, Walker County, Georgia. In: Proc. Fourth Nat. Outdoor Action Conf.  on Aquifer
        Restoration, Ground Water Monitoring and Geophysical Methods. Ground Water Management
        2:1097-1111. [EMI, VLF, MAG]

Chapman, M.J. and E.S. Bair.  1992. Mapping a Brine Plume Using Surface Geophysical Methods in
        Conjunctions with Ground Water Quality Data.  Ground Water 12(3):203-209.  [ER and EM I]

Chew, W.C. 1990. Waves and Fields in Inhomogeneous Media. Van Nostrand Reinhold, New York, 611
        pp.

Cook, P. G, GR Walter, G Buselli, I. Potts, and A.R Dodds. 1992. The Application of Electromagnetic
        Techniques to  Groundwater Recharge Investigations. J. Hydrology 130:201-229. [ER, EMI,
        TDEM]

Corwin, D.L. and J.D. Rhoades. 1982. An Improved Technique for Determining Soil Electrical
        Conductivity-Depth Relations from Above-Ground Electromagnetic Measurements. Soil Sci. Soc.
        Am. J. 46(3):517-520.

Corwin, D.L. and J.D.  Rhoades. 1984. Measurement of Inverted Electrical Conductivity Profiles Using
        Electromagnetic Induction.  Soil Sci. Soc. Am. J. 48:288-291.

Cox, S.A. and W.R. Saunders.  1990. Application of Electromagnetic and Ground Penetrating Radar
        Geophysical Techniques for Identifying Zones of Potential Subsurface Contamination. Ground
       Water Management 2:1035-1047 (4th NOAC).

Davis, J.O. 1991. Depth Zoning and Specialized Processing Methods for Electromagnetic Geophysical
        Surveys to Remote Sense Hydrocarbon Type Ground Water Contaminants. In: Ground Water
        Management 5:905-913 (5th NOAC).

de Jong, E., A.K.  Ballantine, D.R.  Cameron, and D.W.L. Read. 1979. Measurement of Apparent
       Electrical Conductivity  in Soils by an Electromagnetic Induction Probe to Aid Salinity Surveys.
        Soil Sci. Soc. Am. J. 43:810-812.

Drew, T.A., A. Thomas, and R. Wyatt.  1985. Application of Surface Geophysics to Ground Water
       Management Planning. In: Proc. of the AGWSE Eastern Regional Ground Water Conference
        (Portland, ME), National Water Well Association, Dublin, OH, pp. 232-242. [EMI]
                                             4-16

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Duran, P.B.  1984. The Effects of Cultural and Natural Interference on Electromagnetic Conductivity
       Data. In: NWWA/EPA Conf. on Surface and Borehole Geophysical Methods in Ground Water
       Investigations (1st, San Antonio TX), National Water Well Association, Dublin, OH, pp. 509-530.

Duran, P.B.  1987. The Use of Marine Electromagnetic Conductivity as a Tool in Hydrogeologic
       Investigations. Ground Water 25(2): 160-166.

Duran, P.B.  and P.P. Haeni. 1982. The Use of Electromagnetic-Conductivity Techniques in the
       Delineation of Groundwater Leachate Plumes. In: The Impact of Waste Storage and Disposal on
       Ground Water Resources, Proc. of the  Northeast Conference, Novitiski and Levine (eds.), Center
       for Environmental Research,  Cornell University, Ithaca, NY, pp. 8.4.1-8.4.33.

Ehrlich, M, and L.G. Rosen. 1987. Application of Seismic, EM and Resistivity Techniques to Design and
       Ground Water Monitoring Programs at a Landfill in Northeastern Illinois. In: Proc. NWWA
       Focus Conf. on Midwestern Ground Water Issues (Indianapolis, IN), National Water Well
       Association, Dublin, OH, pp. 189-206.

Emilsson, G.R.  and R.T. Wroblewski. 1988. Resolving Conductive Contaminant Plumes in the Presence
       of Irregular Topography.  In: Proc. 2nd Nat. Outdoor Action Conf. on Aquifer Restoration,
       Ground Water Monitoring and Geophysical Methods, National Water Well Association, Dublin,
       OH, pp. 617-635. [ER, EMI]

Environmental Consulting & Technology (EC&T), Inc., Technos, Inc., and UXB International, Inc. 1990).
       Construction Site Environmental  Survey and Clearance Procedures Manual. U.S. Army Toxic and
       Hazardous Materials Agency, Aberdeen Proving Ground MD. [GPR, EMI, MAG, MD, soil gas]

Evans, R.B.  and G.E. Schweitzer.  1984. Assessing Hazardous Waste Problems. Environ. Sci. Technol.
        18(11):330A-339A. [EMI, ER, GPR, MAG, MD, SRR]

Feld, R.H., M. Stammler, G.A. Sandness, and C.S. Kimball. 1983. Geophysical Investigations of
       Abandoned Waste Sites and Contaminated Industrial Areas in West Germany. In: Proc. (4th)
       Nat. Conf. on Management of Uncontrolled Hazardous Waste Sites, Hazardous Materials Control
       Research Institute, Silver Spring,  MD, pp. 68-70. [EMI, GPR, MAG]

Felsen, L.B. (ed.). 1976. Transient Electromagnetic Fields. Springer-Verlag, New York, 274 pp.

Fitterman, D.V. 1986. Transient Electromagnetic Sounding in the Michigan Basin for Ground Water
       Evaluation. In: Proc.  Surface and Borehole Geophysical Methods and Ground Water
       Instrumentation Conf. and Exp., National Water Well Association, Dublin, OH, pp. 334-353.

Fitterman, D.V. 1987. Examples of Transient Sounding for Ground-Water Exploration in Sedimentary
       Aquifers. Ground Water 25:685-692.

Fitterman, D.V. and P. Hoekstra.  1984. Mapping Salt-Water Intrusion with Transient Electromagnetic
       Soundings. In: NWWA/EPA Conf. on  Surface and Borehole Geophysical Methods in Ground
       Water Investigations (1st, San Antonio TX), National Water Well Association, Dublin, OH, pp.
       429-454.

Fitterman, D.V. and M.T. Stewart. 1986. Transient Electromagnetic Sounding for Groundwater.
       Geophysics 51:995-1005.
                                             4-17

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Fitterman, D.V., C.M. Menges, A.M. Al Kamali, and F.E. Jama.  1991. Electromagnetic Mapping of
        Buried Paleochannels in Eastern Abu Dhabi Emirate, U.A.E. Geoexploration 27:111-133. [EMI,
        IDEM]

Fitzgerald, L.J., A.K. Angers, and M.E. Radville. 1986. The Application of VLF Geophysical Equipment
        to Hazardous Waste Site Investigations in New England. In: Proc. of the Third Annual Regional
        Ground Water Conference (Springfield, MA), National Water Well Association, Dublin, OH, pp.
        527-540.

Fowler, J.W. and A. Ayubcha. 1986. Selection of Appropriate Geophysical Techniques for the
        characterization of Abandoned Waste Sites.  In: Proc. Surface and Borehole Geophysical
        Methods and Ground Water Instrumentation Conf. and Exp., National Water Well Association,
        Dublin, OH, pp. 625-656. [ER, EMI, SRR, GPR, GR, MAG]

Fowler, J.W. and D.L. Pasicznyk. 1985. Magnetic Survey Methods Used in the Initial Assessment of a
        Waste Disposal Site. In: Conference on Surface and Borehole Geophysical Methods and Ground
        Water Investigations (2nd, Fort Worth, TX),  National Water Well Association, Dublin, OH, pp.
        267-281. [EMI, MAG]

Fox, F.L. and D.A. Gould.  1984. Delineation of Subsurface Contamination Using Multiple Surficial
        Geophysical Methods. In: Proc. of the NWWA Tech. Division Eastern Regional Ground Water
        Conference (Newton, MA), National Water Well Association, Dublin, OH, pp. 254-264. [EMI,
        ER]

Friedel, M.J., J.A. Jessop, R.E. Thill, and D.L. Veith. 1990. Electromagnetic Investigation of Abandoned
        Mines in the Galena, KS, Area. U.S. Bureau of Mine Report of Investigations 9303,20 pp. [EMI,
        GPR]

Frischknecht, F.C. 1900.). Application of Geophysical Methods to the Study of Pollution Associated with
        Abandoned and Injection Wells. In: Proc. of a U.S. Geological Survey Workshop on
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Rudy, R.J. and J.A. Caoile. 1984. Utilization of Shallow Geophysical Sensing at Two Abandoned
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Rudy, R.J. and  J.B. Warner.  1986. Detection of Abandoned Underground Storage Tanks in Marion
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Rumbaugh, III,  J.O., J.A. Caldwell, and S.T. Shaw. 1987. A Geophysical Ground Water Monitoring
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                                             4-26

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Saunders, W.R. and S.A. Cox. 1987. Use of an Electromagnetic Induction Technique in Subsurface
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Saunders, W.R. and S.A. Cox. 1988. Technical and Logistical Problems Associated with the
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                                          CHAPTER 5
               SURFACE GEOPHYSICS: SEISMIC  AND ACOUSTIC METHODS
        Seismic methods  are  based on the timing  of artificially generated acoustic  signals
propagated through  the ground (or water and ground  as  in  the  case  of continuous seismic
profiling) and  sensed by  electromechanical  transducers  called geophones (if placed on the
ground)  or  hydrophores (if placed in water).  When seismic compressional  waves  (P  waves)
reach a  lithologic contact  with contrasting physical properties, they may be  reflected  back toward
the surface  or  they  may travel along  the  boundary contact before  being  refracted  upward toward
the surface  or downward.  Seismic methods  are  identified primarily by  whether they  detect
reflected or refracted rays. Less commonly, seismic  shear waves  (S waves), in which particles
move in a transverse direction relative  to the propagation of the  wave  rather than back  and forth
as in  a P wave (Section 5.3.2),  or  Rayleigh-type  surface waves (Section  5.3.3) are  measured.

       Seismic refraction (Section 5.1)  has  been most commonly used in  ground-water  and
contaminated site  investigations because  of its relative  simplicity  and adaptability for shallow
zone  investigations.  Relatively  recent developments in shallow  seismic  reflection  (Section  5.2)
and seismic shear methods (Section 5.3.2) have  resulted  in  increased  use of these methods.
Continuous seismic  profiling (Section  5.3.1) and acoustic methods such as  side-scan sonar  and
fathometers (Section 5.4.1) are used to  characterize the  subsurface below rivers, lakes,  and
impoundments.   Seismic  and  acoustic  methods  used for  design and  engineering of structures and
impoundments  include  spectral analysis of  surface waves (Section 5.3.3) and acoustic  emission
monitoring  (Section  5.4.2).

       Since all seismic  and  acoustic methods measure only physical  contrasts,  they  are  unable  to
directly  detect  contaminant  plumes  or subsurface contaminants.  Stratigraphic and geologic
interpretations of high-resolution seismic  techniques,  however, can  be  very  useful  in guiding
placement of  boreholes  for subsurface  sampling  and remediation.
                                               5-1

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 5.1  Seismic  Refraction

        Although seismic refraction has  generally  lower resolution  than seismic reflection,  it
 generally has  been the  preferred seismic method  in shallow  hydrogeological  investigations  for a
 number  of reasons  (Zohdy  et  al,  1974):
        Refraction methods  generally  yield  superior results in areas of thick  alluvial  or  glacial fill
        and  where large velocity  contrasts exist, such as buried bedrock valleys.
        Personnel  and equipment requirements  are  generally  simpler and  less  expensive for
        refraction  surveys  than reflection surveys.
        Tables 5-1 and 5-2 contain over 200  references on the  use of seismic refraction for
geologic, hydrogeologic,  and contaminated  site  investigations.  Because of  recent  advances in
instrumentation and  the development of new  field techniques for  shallow,  high-resolution seismic
reflection techniques have overcome most  of the problems cited  above;  however,  it can no longer
be  assumed  that seismic  refraction  should  be the method  of choice (see  Section  5.2).

        Seismic refraction  techniques  are designed to obtain data on  the  near surface (typically to
about  30 meters,  although depths in excess of 200 meters can be achieved with more powerful
seismic  sources).  Such techniques  provide  data on  the  refraction of seismic waves at the
interface  between  subsurface  layers  and on their travel  time  within the  layers.  Properly
interpreted,  the refraction  data make  it possible  to estimate the thickness and  depth of geologic
layers  (including the  water table)  and to assess  their  properties.  Also, changes in  the  lateral
facies  of aquifer material  can sometimes  be mapped with this  method (Sendlein  and Yazicigil,
1981).

         Figure  5-1 shows a  field  layout for  seismic  refraction  measurements.  A  seismic  source
creates direct compressional  waves  and refracted waves that are sensed by an  array  of geophones.
A hammer is  usually  used as a signal source for  near-surface  investigations. Where  more energy
is required,  firecrackers or small charges of explosives may be used  (Criner, 1966). The
seismograph  records  the time of arrival of all  waves, using the  moment the hammer hits  the
ground as time zero.   The processing and  interpretation  of seismic refraction  data  require  a  great
                                                5-2

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                                                                                  Hammer
                                                                                  Source
                                                                                   Soil
    Refracted Waves
Figure 5-1    Field layout of a 12-channel seismograph showing the path of direct and refracted
             seismic waves in a two-layer soil/rock system (from Benson et al, 1984).
                                         5-3

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 deal  of skill;  Figure  5-2 shows  the  required  steps.  First,  the seismic signal  is recorded on paper
 or  with a  computer.  A single-channel  seismograph plots the waveform  against  time
 (milliseconds)  from  a  single geophone, and  a multichannel instrument records  waveforms from
 multiple geophones.   Then,  travel  time is plotted against the source-to-geophone  distance  to
 produce a  time/distance (T/D) plot.  Finally, line  segments,  slope,  and break points  in the T/I)
 can be analyzed to identify  the  number of layers and  depth of each layer. Figure  5-3  shows a
 number of idealized  T/D plots  for a variety  of subsurface  conditions.  Benson et al. (1984), Haeni
 (1988a), and Zohdy  et  al.  (1974) provide  additional  information  on seismic  refraction.

        An important assumption in  seismic refraction where multiple  layers  exist is that  the
 velocity of seismic waves increases with depth. A layer with lower velocity  below a higher
 velocity layer  will not  be  detected because waves will be refracted downward. There may also  be
 blind zones, layers that are  not  detected  because they are relatively thin  and velocity  increases
 only  slightly compared to  the overlying layer  (Soske,  1959). Sander (1978)  examines  the
 significance  of blind  zones  in  ground-water exploration.  Tucker and Yorsten  (1973) and  Tucker
 (1982)  discuss  in  detail the potential pitfalls  in the  use  and interpretation of seismic  refraction
 data.
5.2  Shallow Seismic  Reflection

        Most  seismic  reflection methods  are designed to identify  geologic contacts  at  depths
greater  than 200 feet (70 m).  They have been used  for many  years  by the petroleum  industry to
obtain  stratigraphic and structural data  on deeply  buried  sediments  (Allen,  1980). These
methods provide the  highest level of  accuracy  and  resolution  in  deep  surface  characterizations of
any  available  geophysical  method.  The  relatively  recent  development  of high-resolution methods,
such as the common-depth-point (CDP)  techniques,  can yield useful  data at depths as shallow as
15  to 30 meters (Ayers,  1989).  The common-offset  method has been successfully used at
interfaces as shallow  as 2.7 meters  (Birkelo et al., 1987), but a more typical  minimum depth
would be approximately 10 meters.
                                               5-4

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                              Single Channel
                                                                         TD Plots
                                                                           Interpreted
                                                                        Geologic Section
Figure 5-2 Flow diagram showing steps in the processing and interpretation of seismic refraction
          data  (from Benson et al,  1984).
                                          5-5

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                                                @ Model with Continuous
                                                  Velocity Increase
                                                               ;=VO+KZ
                                       © Dipping Layer Model
         ©Sloping Surface Model
                                PS,
                                                                                       ® Discordant Body Model
                                                                                                     V,
        0 Blind Zone Model
© Velocity Inversion
  Model
                                                         Vz_
                                                    \   V3
© Irregular Refractor Model
                                                                                                  V,
                                                                                                  V2
                                           ©Model with Laterally Varying Velocity
                                            jBased on 41 Geophones)
                                            V5      V4  V5V3    V6     V8        V7
Figure 5-3     Schematic traveltime curves for idealized nonhomogenous geologic models (from Zohdy et al..
               1974).
                                              5-6

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        Seismic reflection surveys  are  generally similar to seismic refraction surveys in terms  of
instrumentation.  Reflection  surveys,  however,  usually  are conducted  with  shorter spacing  but
with  more  geophones  compared to refraction  surveys  of similar depths.  In addition to recording
the time  of first  arrival, in  a  reflection  survey numerous arrivals of reflected waves are recorded
at each  geophone and multiple shots are used to  create  seismic waves,  resulting in  more  data
recorded  and requiring more complex data  processing.  Table  5-3 identifies references on  shallow
seismic reflection methods,  most of which have  been published  since 1980.  Section  1.4.2 in U.S.
EPA  (1993)  summarizes  general  advantages and disadvantages  of seismic  reflection.
5.3 Other Seismic Methods

        Seismic methods  with specialized  applications  include continuous  seismic  profiling,
seismic shear  surveys, and  spectral analysis  of surface  waves. All three methods  are discussed
below.

        5.3.1 Continuous  Seismic Profiling (CSP)

        CSP (also called  marine  seismic  reflection,  acoustical or continuous  high-resolution
subbottom profiling,  and  sonar  seismic  reflection)  is a  method  originally developed  and used  in
deep-water  marine geology  investigations  and  currently is used  routinely  for petroleum
exploration. It differs  from land-based  seismic  techniques  in  that usually  one channel  is used to
detect signals.  This method can be used  to  define hydrologic boundaries  of  shallow aquifers  and
in some cases can indicate  the  lithology of glacial  deposits, provided that  the area of interest  is
crossed by  rivers,  large streams, lakes,  ponds,  or estuaries (Morrissey et al., 1985).

        In  shallow water,  high-resolution,  single-channel,  continuous  seismic  reflection  equipment
is towed  through  the  water alongside or behind the survey boat. The energy source
(electromechanical  transducers, sparkers, or  airguns)  emits  sounds into  the  water at  a  fixed
frequency or within  a range  of frequency.  The  receiver,  called  a  hydrophore, detects the
reflected acoustic  signals,  which are processed in a  manner similar to the land-based seismic
reflection  method  to  create  a  profile of the  subsurface  below the boat's line  of travel.  The
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position of the boat must be established  and maintained  throughout the  survey relying on
methods as various as the use of multiple survey crews siting the survey boat  from land to the
use  of sophisticated microwave positioning  systems.  A grid pattern  of survey  lines  allows a three-
dimensional representation of the subsurface.  A fathometer survey (Section 5.4.1)  is  usually
conducted  simultaneously to provide  an indication of  water depth  that facilitates the  calculations
concerning  thicknesses  of subbottom strata.

        Continuous  seismic profiling  is  the most commonly  used of the "minor"  seismic  methods
in ground-water and  contaminated site  investigations (Table 5-4).

        5.3.2 Seismic  Shear Methods

        Seismic shear methods  record the time of arrival of seismic  waves created at a point
transverse  to  the  line  of the  geophone  array. When used in combination with seismic refraction
data, the ground-water  surface can be  more  readily differentiated from  other  lithologic  contacts.
Wrege  et al.  (1985) found that this  method was more successful  than conventional  seismic
refraction and  reflection in detecting subsurface fissures  that have  developed  where  overpumping
of ground water has  caused  subsidence.  Table  5-4  identifies  several  recent  studies reporting  the
use  of seismic shear  in hydrogeologic  investigations and for fracture  detection.  Danbom and
Domenico  (1987) is a useful  source for more detailed information  on this method.

        Basic  instrumentation  for  seismic  shear  measurements is  similar  to  the equipment used
with seismic refraction  and reflection methods except that layouts are modified to  record  the
time of arrival  of seismic shear waves (S  waves), in which  particles move in a transverse direction
relative to the  propagation of the wave  rather than back and forth as in a compressional  wave (P
wave),  which is observed  in  conventional  seismic refraction and  reflection.  S  waves are  generated
by delivering a sledgehammer blow to the soil at an  angle to the  ground surface or  by  using a set
of three sequential  explosive  shots.  Both reflection  and refraction of S waves  can  be  measured
and  analyzed.
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        5.33  Spectral Analysis of  Surface Waves

        Spectral analysis  of surface waves (SASW) is used to measure dynamic soil  properties,
primarily  for the purpose of evaluating  soil strength  and stability in response to stress from
earthquakes.  Cross-hole  seismic  methods also  are used to measure  these soil  properties  (see
Section 7.3.3). The technique calls for the  use of two  vertical transducers  placed  on the  ground
surface at equal distances from an imaginary  centerline. A vertical impulse  is  generated on  the
ground surface, and surface waves of the Rayleigh type are monitored as they propagate  past the
two transducers. Successive seismic impulses of different wavelengths allow the sampling of
different depths of soil, with  low frequency waves sampling greater depths.

        Table 5-4 identifies a selection of references on the use of the SASW  method. Although
its use has not been reported in the ground-water and contaminated site characterization
literature,  potential applications of this method include geotechnical investigations for the design
of structures at Resource Conservation and Recovery Act (RCRA) facilities and remediation-
related activities.
5.4 Acoustic Methods

        5.4.1 Sonar  Methods

        The term sonar is usually  applied to the use acoustic  signals to  detect the interface
between water  and the  water bottom surface  as  well  as objects in  water  or  lying on  the bottom,
although the term also has  been used to describe continuous seismic profiling.  These sonar
methods are classified  as  acoustic  rather than seismic because the  signals that are detected do
not travel  through the  earth (unlike  continuous  seismic profiling, which  involves  the  detection of
signals  that travel through  both water and the  sediments  below the water).  Two sonar methods
that  have potential for application at contaminated sites where surface water is  present  include
side-scan  sonar  and fathometer water bottom surveys.
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        Side-scan sonar involves using  a boat to pull  a towfish that contains  transducers for
 sending bursts  of high-intensity, high-frequency  acoustic signals and  for receiving the echoes  from
 these  signals.  The  signals are amplified and processed to create an  image of the  water bottom
 surface that may cover as much  as  several  hundred meters on both  sides  of the survey line.  The
 resolution of the image  is sufficient to  identify  details such as  bedrock outcrops, rough or smooth
 mud  surfaces, sand  surfaces, gravel  or  boulders, and  collapsed  features.

        A fathometer is  similar to side-scan sonar, except that it only  records bottom topography
 directly  below  the  instrument.  A  fathometer survey  is  required for accurate  interpretation  of
 continuous  seismic  profiles.  Both  instruments  can be  used in  conjunction  with  an underwater
 magnetometer  to locate  metal containers at or  below the  sediment  surface.  Table  5-4  identifies
 some  of  the  literature on the use  of sonar methods; none of the material  cited,  however,  is
 directly  related  to the investigation  of contaminated  sites.

        5.4.2  Acoustic Emission Monitoring

        Acoustic emission monitoring,  also  called  the  microseismic  method,  is a seismic method
 that uses a natural  field signal  source.  It is classified  as an acoustic method here  because that is
 the term  that is most commonly  used for this  method (see references identified in  Table  5-4).
Acoustic  emission monitoring is mainly used to detect  instabilities  in  engineered  structures  such
 as  dams  or impoundments.

        The method  involves  the detection of subaudible sound  waves caused  by the release  of
 stored elastic-strain energy  in stressed  materials  (e.g.,  dislocations,  grain  boundary movement,
 and initiation  and propagation of  fractures  through  rather  than between  mineral grains).  A  wave
guide  (steel rod or plastic pipe),  inserted in the ground or lowered down  a borehole, transmits
signals to a sensor.  The  sensor, an  accelerometer, converts the  mechanical wave energy to  an
electrical  signal  that is  filtered and amplified,  and a signal counter records a  count each time the
signal exceeds a threshold that is  above the background noise  level.

       Acoustic emission installations require  preliminary testing  to distinguish  background  noise
levels  from such factors  as  wind, thunderstorms, barometric changes, power lines,  operation  of
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nearby  machinery, passing  airplanes,  and  vehicular traffic.  Monitoring  may be  continuous or
periodic.
5.5 Borehole Acoustic and Seismic Methods

        A  variety of borehole  acoustic (i.e.,  acoustic  velocity,  acoustic-waveform, acoustic
televiewer)  and  seismic  (i.e., vertical seismic profiling  uphole, downhole,  seismic cone
penetrometry; and cross-hole profiling)  methods  are  covered  in  Chapter  7.  Borehole  acoustic
velocity  logs  can be used  to calibrate surface seismic surveys  (Wrege,  1986).
                                              5-11

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Table 5-1 Index to General References on Seismic Refraction
Topic
References
General

General Texts
Analysis/
Interpretation
Wave Theory Texts

Other Texts/Reports
Covering Seismic
Retraction
Review  Papers


Theory


Rock Properties

Blind Zone/Limitations


SRR-SRL Comparison


Seismic  Sources
Badley (1985), Dix (1952-oil prospecting), Haeni (1986c,
 1988a-hydrogeology), Mooney (1984), Musgrave (1967), Palmer (1986),
Redpath (1973),  Waters  (1981)

Berkhout (1985,  1988), Fagin (1991), Palmer (1980), Russell (1988),
Slotnick (1959), Tucker (1982), Tucker and Yorsten (1973); Use of
Computers: Ackermann et al. (1983), Haeni et al. (1987), Scott (1973,
 1977a,b), Scott et al.  (1972), Scott and Markiewicz (1990); Papers:
Kanemori et al. (1992), Lankston (1988), Lankston and Lankston (1986),
Meidav (1968)

Auld (1990), Berkhkout  (1987), Bland (1988), Davis  (1988),  White  (1965)

Benson et al. (1984), Pitchford et al. (1988), Redwine et al. (1985), Rehm
et al. (1985), U.S. EPA (1987), USGS (1980), Zohdy et al. (1974); see
also Table  1-4 for identification of general geophysics texts covering
seismics

Allen (1980),  Burwell (1940), Dix (1960), Green (1974), Hasselstrom
(1969), Hobson (1970), Linehan (1951), Stare (1962)

Dix (1939a,b), Evison (1952), Hawkins (1961—reciprocal method),  Pullan
and Hunter (1985), Sander (1978), Widess (1973)

Auld (1990), Carmichael (1982)

Burke  (1970),  Domzalski (1956),  Lankston (1989), Sander (1978), Soske
(1959), Wallace (1970)

Adams (1992), Gahr et al. (1988), McDonald et al. (1992), Sauck (1991),
Wrege (1986)

Criner  (1966),  Miller  et al. (1986), Wang et al.  (1992)
                                          5-12

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Table 5-2 Index to References on Applications of Seismic Refraction
Topic
References
Seismic Refraction Abdications: Ground Water
Artificial Recharge

Quantitative Aquifer
Properties*
Glacial/Alluvial
Aquifers*

Glacial/Alluvial
Deposits over Bedrock*


Thick Alluvial  Basins*
Alluvium-Sedimentary-
Crystalline Rock*

Stratified Drift-Dense
Till-Crystalline Rock*

Sand/Gravel-Thin Till-
Crystalline Rock*
Aquifer-Bedrock
Similar Velocity*
Bianchi and Nightingale (1975)

Barker and Worthington (1973), Duffin and Elder (1979), Eaton and
Watkins (1970), van Zijl and Huyssen (1971),  Wallace and  Spangler
(1970),  Worthington  (1975a), Worthington and Griffiths (1975)

Burwell (1940), Emerson (1968), Galfi and Pales (1970), Scott et al.
(1972), Sjogren and Wager (1969)

Duguid (1968), Gill et al. (1965), Joiner et al.  (1968), Lennox and
Carlson (1967), Mercer and Lappala (1970), Peterson et al.  (1968), Wachs
et al. (1979)

Ackermann et al. (1983), Arnow and Mattick (1968), Crosby (1976),
Dudley and McGinnis (1976), Libby et al. (1970), Marshall  (1971),
Mattick et al. (1973), Mower (1968), Pankratz et al. (1978), Robinson and
Costain (1971), Wallace (1970)

Colon-Dieppa and Quinones-Marquez (1985), Scott et al. (1972), Torres-
Gonzalez  (1985),  Visarion et al.  (1976)

Johnson (1954), Mazzaferro (1980), Sander (1978), Scott et al. (1972)
Birch (1976), Dickerman and Johnson (1977), Frohlich (1979), Grady  and
Handman (1983), Haeni (1978, 1986a), Haeni and Anderson (1980),
Haeni and Melvin (1984), Mazzaferro (1980,  1986),  Morrissey (1983),
Sander (1978), Scott et al.  (1978), Sharp et al. (1977), Tolman et al.
(1983), Warrick and Winslow (1960), Winter  (1984).

Broadbent (1978), Topper and Legg (1974)
                                            5-13

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                                          Table 5-2 (cont.)
 Topic
 References
 Seismic Refraction Applications: Ground Water (cont.)
Variable-Thickness
Lithic  Sediments*

Other  Ground-Water Studies
Pakiser and Black (1957)
Ackermann (1976-permafrost),* Ali (1985), Ayers (1988, 1989), Bonnini
(1959), Butler and Llopis (1985), Carpenter and Bassarab (1964),
Greenhouse et al. (1990), Harmon (1984), Hasselstrom (1969), Hinchey
and Gould (1990), Hobson (1970), Hobson et al. (1962), Joiner and
Scarborough (1969), Joiner et al. (1967), Kent and Sendlein (1972),
Lankston et al. (1985), Laudon (1984), Laymen and Gilkeson (1989),
Lennox and Carlson (1970),  Linehan and Keith (1949), O'Brien and
Stone (1984, 1985), Sauck (1991),  Sendlein and Yazicigil (1981), Shields
and Sopper (1969),* Stickel et al. (1952), Stierman et al. (1986), Sverdrup
(1986), Taylor and Cherkauer (1984), Underwood et al. (1984), Urban
and Pasquerell (1992-fractured rock), Van Overmeeren (1980, 1981),
Wantland (1951), Wightman  (1988), Wilson et  al. (1970), Worthington
(1975b), Wrege (1986), Zohdy (1965)
Seismic Refraction Applications:  Contaminated Sites
Contaminated  Sites
Landfills

Monitoring Well Design


Waste Injection
Adams (1992), Adams et al. (1988), Allen and Rogers (1989), Benson et
al. (1991), Bianchi and Nightingale  (1975), Blackey and Stoner (1988),
Bruehl (1983, 1984), Carpenter et al. (1991), Cichowicz et al. (1981),
Ehrlich and Rosen (1987), Emilsson and Wroblewski (1988), Evans and
Schweitzer (1984), Feld et al.  (1983),  Fowler and Ayubcha (1986), Gilmer
and Helbling (1984), Hall and Pasicznyk (1987), Hennon et al.  (1991),
Leisch (1976), Pease and James (1981), Grady and Haeni (1984), James
(1981), Roberts et al. (1989), Rodrigues (1987), Saunders and Stanford
(1984), Walsh (1988),  Williams et al. (1984), Yaffe et al. (1981)

Carpenter (19%3), McQuown et al. (1991)

Gorin and Gilkeson (1991), Regan et al. (1987), Sendlein and Yazicigil
(1981)

Barr (1973)
                                              5-14

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                                          Table 5-2 (cont.)
Topic                         References
Seismic Refraction Applications: Subsurface  Characterization

Bedrock Valleys and           Burgdorf and Richard (1984), Ghatge and Pasicznyk (1986), Nyquist et al.
Topography                    (1992), Pullan et al. (1987)

Coastal Areas                 McDonald et al.  (1992)

Karst                         Imse and Levine (1985), LaMoreaux and Madison (1984)

Structure/Stratigraphy           Gardner (1939)

Subsurface Cavities             Cook (1964), Filler and Kuo (1989), Steeples et al. (1986)

Unconsolidated Deposits       Denne et al. (1984), Ehrlich and Rosen (1987), Johnson (1954), Hinchey
                              and Gould (1990), Lennox and Carlson (1967), McGinnis and Kempton
                              (1961), O'Brien  and Stone (1984), Stierman et al. (1986), Tibbets and
                              Scott (1972), Washburn (1992), Zehner (1973)
* Classification taken from Haeni (1988a). Annotations to references in these sections can be found in
Haeni (1988a).
                                         5-15

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Table 5-3 Index to References on Seismic Reflection Methods
Topic
References
General
Interpretation

Applications

Contaminated  Sites


Engineering Investigations

Ground Water
Alluvium

Structure/Stratigraphy


Bedrock

Coal Seams
Knapp and Steeples (1986a,b), Johnson and Clark (1992), Lankston and
Lankston (1983, 1988), Hunter and Pullan (1989), Pakiser and Warrick
(1956), Ruskey (1982), Schepers (1975),  Steeples and Miller (1988),
Waters (1981)

Badley (1985), Kleyn (1983)
Adams (1992), Benson et al. (1991), Bikis and Lewis (1992), Irons and
Lewis (1989, 1990), Miller and Steeples (1990), U.S. EPA (1987)

McDonald et al.  (1992)

Ayers (1988, 1989), Birkelo et al. (1987), Irons et al.  (1991), Kleinschmidt
and Pelton (1989), Lewis et al. (1990-monitoring well design), Sauck
(1991), Slaine (1988), Steeples and Miller (1988), Wrege (1986); Texts:
Redwine  et al. (1985), USGS  (1980)

Hasbrouck (1990a), Kopsick and Stander (1983), Lankston et al. (1985)

Allen et al. (1952), Gagne et al. (1985), Hunter et al. (1982, 1984),
Richards  (1960)

Miller et al.  (1989), Singh (1986-shallow)

Lepper and Ruskey  (1976)
                                          5-16

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Table 5-4 Index to References on Miscellaneous Seismic and Acoustic Methods
Topic
References
Continuous Seismic Profiling

General
Interpretation


Case Studies
Seismic Shear

General



Bibliography

Case Studies


Fracture Detection

Spectral Analysis of
Surface Waves

Acoustic Emission  Monitoring
Sonar
Texts: Burdic (1991), Coates (1989), EG&G Environmental Equipment
Division (1977), Hassab (1989—signal processing), Mersey (1963),
Redwine et al. (1985-CSP and sonar), Sylwester (1983), Trabant (1984);
Review Papers: Haeni (1986b, 1992)

Badley (1985), Ewing and Tirey (1961), Leenhart (1969), Roksandic
(1978),  Sangree and Widmier (1979), Tufekcic (1978)

Cardinell and Berg (1992), Cherkauer and Taylor (1988), Haeni (1986b,
1988b), Haeni and Melvin (1984), Hansen (1986), Hughes (1991,
1992-contaminated  site),  Missimer and Gardner (1976), Moody and Van
Reenan (1967), Morrissey et al. (1985),  Sjostrom et al. (1992), Van
Overeem (1977), Van Reenan  (1964), Wollansky et al. (1983)
Texts/Symposia CH2M Hill (1991), Danbom and Domenico (1987), Dohr
(1985), Woods (1985): Papers: Bates et al. (1992), Johnson and Clark
(1992)

Ensley  (1987)

Bates et al. (1991), Dobecki (1988), Hasbrouck  (1986, 1987, 1990b, 1991),
Wrege  (1986), Wrege et al. (1985)

Bates et al. (1991), Martin and Davis (1987), Richard et al. (1991)

CH2M Hill (1991), Dobecki (1988), Stokoe and Nazarian (1985), Woods
(1985)

Boyce et al. (1981), Davis et al. (1983,  1984), Descour and Miller (1989),
Huck (1982), Koerner and Lord (1976, 1981), Koerner et al. (1976, 1978,
1981a,  1981b), Lord and Koerner (1980, 1987), Redwine  et al. (1985),
U.S. EPA (1979),  Wailer and Davis (1984)

Baxter and Mills (1992), Fish and Carr (1990), Lord and Koerner (1980,
1987), Saucier (1969, 1970), Redwine et al. (1985)
                                          5-17

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 5.6 References

 See Glossary for meaning of method abbreviations.

 Ackermann, H.D. 1976. Geophysical Prospecting for Ground Water in Alaska. U.S. Geological Survey
        Earthquake Information Bulletin 8(2): 18-20. [ER, SRR in permafrost areas]*

 Ackermann, H.D., L.W. Pandratz, and D.A. Dansereau. 1983. A Comprehensive System for Interpreting
        Seismic Refraction Arrival-Time Data Using Interactive Computer Methods. U.S. Geological
        Survey Open-File Report 82-1065, 265 pp.

 Adams, M.L. 1992.  Seismic Reflection/Refraction Survey to Characterize the Subsurface at an NPL Site
        in the Mojave Desert. In: SAGEEP '92, Society of Engineering and Mineral Exploration
        Geophysicists, Golden, CO, pp. 565-585

 Adams, M.L., M.S.  Turner, and  M.T. Morrow. 1988. The Use of Surface and Downhole Geophysical
        Techniques to Characterize Flow in a Fracture Bedrock Aquifer System. In:  Proc. 2nd Nat.
        Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH, pp. 825-847. [EMI,  ER, SRR, VSP,
        borehole television]

 Ali, H.O.  1985. Gravity and Seismic Refraction Measurements for Deep Ground Water Search in
        Southern Darfur Region, Sudan. In: NWWA Conference on Surface and Borehole Geophysical
        Methods and Ground  Water  Investigations (2nd, Fort Worth, TX), National Water Well
        Association, Dublin, OH, pp.  106-120.

 Allen, C.F., L.V. Lombardi, and  W.M. Wells. 1952. The Application of the Reflection Seismograph to
        Near-Surface Exploration.  Geophysics  17:859-866.

 Allen, R.P. and B.A. Rogers.  1989. Geophysical Surveys in Support of a Remedial
        Investigation/Feasibility Study at the Municipal Landfill in Metamora, Michigan. In: Proc. 3rd
        Nat. Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH, pp. 1007-1020. [ER, MAG, SRR]

 Allen, S.J. 1980. Seismic Method. Geophysics 45(11): 1619-1633.

 Arnow,  T. and R.E.  Mattick. 1968. Thickness of Valley Fill in the Jordan Valley East of the Great Salt
        Lake, Utah.  U.S. Geological Survey Professional Paper 600-B, pp. B79-B82. [SRR]*

 Auld, B.A. (cd.). 1990. Acoustic Fields and Waves in Solids, Vol. I and II, 2nd rev. Robert E. Krieger
        Publishing, Malabar, FL, (I) 435 pp, (II) 421  pp.

 Ayers, J.F. 1988. Application  of Geophysical Techniques in the Study of an Alluvial Aquifer. In: Proc.
        Second Nat. Outdoor Action Conf. on Aquifer Restoration,  Ground Water Monitoring and
        Geophysical Methods, National Water Well Association, Dublin, OH, pp. 801-824. [ER, SRR,
        SRL]

Ayers, J.F. 1989. Application and Comparison of Shallow  Seismic Methods in the Study of an Alluvial
       Aquifer. Ground Water 27(4):550-563. [SRR, SRL] [See also 1990 discussion by RW. Lankston
       and reply in Ground Water 28(1): 116-118.]
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Badley, M.E. 1985. Practical Seismic Interpretation.  International Human Resources Development
        Corporation, Boston, MA, 266 pp. [SRL, CSP]

Barker, R.D. and P.P. Worthington.  1973. Some Hydrogeophysical Properties of the Bunter Sandstone of
        Northwest England Geoexploration 11:151-170. [SRR, ER]*

Barr, Jr., F.J. 1973. Feasibility Study of a Seismic Reflection Monitoring System for Underground Waste-
        Material Injection Sites. In: Symposium on Underground Waste Management and Artificial
        Recharge, J. Braunstein (ed.), IASH Pub. No. 110,  Int. Ass. of Hydrological Sciences, pp. 207-218.

Bates,  C.R., D. Phillips, and B. Hoekstra. 1991. Geophysical Surveys for Fracture Mapping and Solution
        Cavity Delineation. In: Ground Water Management 7:659-673 (8th NWWA Eastern GW
        Conference), [shear-wave refraction, cross-borehole tomography]

Bates,  C.R, D. Phillips, and J. Hild. 1992. Studies in P-Wave and S-Wave Seismics. In SAGEEP  '92,
        Society of Engineering and  Mineral Exploration Geophysicists, Golden, CO, pp. 261-274.

Baxter, P.A. and RJ. Mills. 1992. The Model SE880 Sonar Image and Record Enhancement System. In:
        SAGEEP '92, Society of Engineering and Mineral  Exploration Geophysicists, Golden, CO, pp.
        185-196.

Benson, R.C. 1991. Remote Sensing and Geophysical Methods for Evaluation of Subsurface Conditions.
        In: Practical Handbook of Ground-Water Monitoring, D.M. Nielsen (cd.), Lewis Publishers,
        Chelsea, MI, pp. 143-194. [GPR,  EMI, IDEM, ER, SRR, SRL, GR, MAG, MD, BH]

Benson, R. C., R.A. Glaccum, and M.R. Noel.  1984. Geophysical Techniques for Sensing Buried Wastes
        and Waste Migration. EPA/600/7-84/064 (NTIS PB84-198449), 236 pp. Also published in 1982 in
        NWWA/EPA series by National Water Well Association, Dublin, OH. [EMI, ER, GPR, MAG,
        MD, SRR]

Berkhout, A.J. 1985. Seismic Migration: Imaging of Acoustic Energy by Wave  Field Extrapolation.  A.
        Theoretical Aspects (2nd ed.), 446 pp; B. Practical Aspects. Elsevier, New York.

Berkhout, A.J. 1987. Applied Seismic Wave Theory. Elsevier, New York, 377 pp.

Berkhout, A.J. 1988. Seismic Resolution:  A Quantitative Analysis of the Resolving Power of Acoustical
        Echo Techniques. Pergamon, New York, 228 pp.

Bianchi, W.C. and H.I. Nightingale. 1975. Hammer Seismic Timing as a Tools for Artificial Recharge
        Site Selection. Soil Sci.  Soc. Am.  Proc 39(4):747-751.

Bikis, E.A. and B.R. Lewis.  1992. Integration of Shallow, High-Resolution Seismic Reflection Data and
        Subsurface Geological Information to Characterize the Hydrogeology at the Rocky Flats Nuclear
        Weapons Plant, Golden, Colorado. In: Ground Water Management 11:629-643 (Proc. of the  6th
        NOAC).

Birch, F.S.  1976. A Seismic Ground-Water Survey in New Hampshire.  Ground Water 14:94-100. [SRR]

Birkelo, B.A., D.W. Steeples, R.D. Miller,  and M. Sophocleous.   1987. Seismic Reflection Study of a
        Shallow Aquifer During a Pumping Test. Ground Water 25(6):703-709.
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Blackey, M. and D.A.  Stoner.  1988. Application of Seismic Refraction Analysis to Siting a Waste
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Pilon, J.A.  (ed.).  1992. Ground Penetrating Radar. Geological Survey of Canada Paper 90-4, 241 pp.

Pitchford, A.M., A.T. Mazzella, and K.R. Scarborough.  1988. Soil-Gas and Geophysical Techniques for
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Pittman, W.E., Jr., RH.  Church, W.E. Webb, and J.T. McLendon.  1984. Ground-Penetrating Radar: A
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Poeter, E.P. 1989. Delineating Geometry of Unconfined Aquifer Heterogeneities with Microgravity
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Puckett, W.E., M.E. Collins, and G.  Schellentrager. 1986. Evaluating Soil-Landscape Patterns on Karst
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Ram Babu, H.V., N. Kameswara Rao,  and V. Vijay Kumar. 1991. Bedrock  Topography from Magnetic
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Randall, A.D. 1986. Aquifer Modeling of the Susquehanna River Valley in  Southwest Broome County,
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Redman, J.D., B.H. Kueper, and A.P. Annan.  1991. Dielectric Stratigraphy  of a DNAPL Spill and
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Redwine, J. et al.  1985. Groundwater Manual for the Electric Utility Industry, Volume 3: Groundwater
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Reford,  M.S.  1980. Magnetic  Method. Geophysics 45(11) : 1640-1658...

Regan, J. M., M.S. Robinette, and T.R. Beaulieu. 1987. The Use of Remote  Sensing, Geophysical, and
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                                            6-30

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        In: Proc. of the Fourth Annual Eastern Regional Ground Water Conference (Burlington, VT),
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Rehm, B.W., T.R. Stolzenburg, and D.G. Nichols. 1985. Field Measurement Methods for Hydrogeologic
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Roberts, R. G., W.J. Hinze, and D.I. Leap.  1989.  A Multi-Technique Geophysical Approach to Landfill
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Rodriguez, E.B. 1987. Application of Gravity and Seismic Methods in Hydrogeological Mapping at a
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                                             6-34

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Zobeck, T.M., J.G. Lyon, D.R. Mapes, and A. Ritchie, Jr. 1985. Calibrating Ground-Penetrating Radar
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                                             6-37

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                                      CHAPTER 6
                      SURFACE GEOPHYSICS:  OTHER METHODS
       Four other major types of surface geophysical methods can be used in the study of
ground water and contaminated sites.  These involve ground penetrating radar (GPR-Section
6. 1), magnetometry (Section 6.2), gravity measurements (Section 6.3) and shallow geothermal
measurements (Section 6.4.1). GPR is commonly used for site characterization (e.g., identifying
depth to the water table and bedrock) and detection of buried wastes. Magnetic methods are
widely used to detect buried metal objects, but also can be used for geologic characterization.
Gravity is typically used for mapping bedrock topographies, especially buried valleys, and
microgravity surveys can be used to detect subsurface cavities.  Shallow geothermal methods have
been used to study shallow ground-water flow systems and to monitor landfill leachate.
6.1 Ground Penetrating Radar and Related Methods

       6.1.1  Terminology

       Geophysical methods using the radio- and microwave portion of the electromagnetic
spectrum probably have the most confusing terminology of any surface method (i.e., less
consensus early on within the geophysics community). For example, ground penetrating radar
(the most common term for this method in the literature) may be referred to as electromagnetic
subsurface profiling (Morey and Harrington, 1972), electromagnetic pulse radar (Moffat and
Puskar, 1976), pulsed microwave (Lord and Koemer, 1987a), or pulsed radio frequency (Koerner
and Lord,  1986). Other names  identified by Benson et al. (1984) include ground piercing radar,
ground probing radar, and subsurface impulse radar.

       Microwaves range from about 0.1 to 100 centimeters in wavelength (see Figure 2-1) (the
term is something of a misnomer, since, although such wavelengths are small when compared to
radio waves, they are extremely long when compared to wavelengths in the visible portion of the
spectrum). Sensing in the microwave portion of the EM spectrum can be active or passive.

                                          6-1

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Passive microwave sensing systems rely on a lens or antenna that receives energy coming from an
outside source and focuses it on a detector. Thermal infrared scanning (see Section 2.2), for
example, is a passive microwave sensing system. Active microwave sensing systems involve a
transmitter that provides an independent source of energy and a receiver that senses the
reflected or echoed signal.

       The term radar (an acronym derived from the phrase Radio Detection And Ranging)
implies the use of an active energy source for sensing. Usually the signal is emitted as short,
powerful bursts  of energy called pulses. Less commonly, a continuous wave (CW) signal  is  used.

       6.1.2  Ground  Penetrating Radar

       Ground penetrating radar (GPR) has been used at contaminated sites since the late
 1970s (Table 6-1). The method involves use of a small antenna to radiate short pulses of high-
frequency radio  waves (ranging from around 10 MHz to 1,000 MHz) into the subsurface  and a
receiving antenna  to record variations in the reflected return signal (Figure 6-1). The principles
involved are similar to reflection seismology (see Section 5.2), except that electromagnetic energy
is used instead of acoustic energy. Figure 6-2 illustrates the types of lithologic and stratigraphic
interpretations that can be made using GPR images.

       Dragging the antennae along the ground surface creates a continuous profile that  gives
the greatest resolution of all the surface geophysical methods discussed in this reference guide.
Still, the depth of penetration is generally less than with other methods (1 to 25 meters, although
hundreds of meters are possible in certain materials, such as salt domes) and is reduced by fluids,
soils with high electrical conductivity, and fine-grained materials. Best overall penetration is
usually achieved in dry, sandy, or rocky areas; poorer results are obtained in moist, clayey, or
conductive soils. Davis et al. (1984) reported penetration to a depth of 25 meters in dry sandy
soil. Attenuation is particularly severe in clay-rich soils and where water content exceeds  40
percent (Horton  et al.,  1981). Benson et al. (1984) provide more detailed information on the
principles and applications of GPR.
                                           6-2

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                                                                     Graphic Recorder
            il   I '-1111.111.1111111  .  I    .ifnin.r	I I .mil	  I
                               "
Figure 6-1     Block diagram of ground penetrating radar system. Radar waves are reflected from
              soil-rock interface (from Benson et al, 1984).
                                       6-3

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                                      Reflection Fre*
            fl
t. Attenuated Energy
2. SiBy Laousfr*
3. Sand, Massive, or Thick-Bedded
4. T», Masstve, Few Bonders
                                                                                1. Sedtmwtts, Massiwe, BouWers
                                            P*f»M
                                            Wavy
                                                                                              Bedded
                                                                                £, Sand, Beddad
Humreocky
                                                                                1. Sand, Bedded
                                                                                2. Sand and Gravel, Bedded
                                                                                1. Sand, t>iin to Thtek-Badded
                                        Chaotic
                                  Chaotic wWi Diffractions
                                                                                1. Sand and Gravel, Cross-Bedded
                                     1, Sand, Cross-Bedded, SowWers  |
                                     111, Massive, Numerous BouWers
Figure 6-2     Reflection configurations on ground penetrating radar images indicating the lithologic and
              stratigraphic properties of sediments in the glaciated Northwest (Beres and Haeni, 1991).
                                                   6-4

-------
       The military provided the impetus for the development of GPR in the mid-1960s and
early 1970s, primarily for use in detecting land mines and subsurface tunnels.  Since then, GPR
has been used increasingly in the mining industry (Pittman et al., 1984) and in geologic and soil
investigations to characterize depth to water table, soil horizon and lithologic contacts, cavities,
faults, and bedding joints and planes in rocks (Doolittle, 1987).  Uses at contaminated sites
include detection of buried containers and leaks, mapping of trench boundaries, and general
subsurface characterization. GPR is the only consistently reliable method for detecting buried
plastic containers (Lord and Koerner, 1987a).

       Table 6-1 lists over 30 studies reporting the use of GPR at contaminated sites and over
40 references on other applications,  GPR is especially popular for soil characterization,  since
depth penetration limitations are usually not a problem.
6.2 Magnetometry

       Magnetic measurements have long been used to map regional geologic structures and to
carry out mineral exploration (Reford, 1980). Their main use in ground-water contamination
studies is to locate buried metal drums that may be a source of contamination. Where drums are
buried in shallow trenches, trench boundaries also can be located with magnetometer surveys
(Gilkeson et al., 1986). A magnetometer locates ferrous metals (iron, steel, and nickel) in drums
and buried pipelines, for instance, by measuring local perturbations in the strength of the earth's
magnetic field. Single 55-gallon drums can be sensed up to  a depth of 6 meters,  and piles of
drums up to 20 meters (Benson et al., 1984). Calculating the depth of buried objects with
magnetometry is difficult, however.

       Magnetometers measure either intensity of the earth's total magnetic field at a point or
gradients in the magnetic field. Proton precession magnetometers use the precession of spinning
protons after a coil is energized momentarily to measure the earth's total magnetic field.
Fluxgate magnetometers measure a component of the earth's magnetic field, usually the vertical
component.  Two types of measurements are commonly made with magnetometers:  total field
measurements and gradient measurements.  Proton magnetometers are usually configured for
                                           6-5

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point total field measurements, which requires a closely spaced grid 'of station measurements to
provide complete coverage of a site. Fluxgate magnetometers are usually configured as
gradiometers, which allow continuous measurement of the gradient in the magnetic field along a
transect. Anomalous readings (measured as gammas) indicate the presence of ferrous metals.

     Benson et al. (1984) provide additional information on the use of magnetometers at
contaminated sites. Section 1.52 in U.S. EPA (1993) summarizes advantages  and disadvantages
of proton and fluxgate magnetometers. Table 6-2 lists references for additional information on
the use of magnetic methods for geologic, hydrogeologic, and contaminated site investigations.
6.3  Gravimetrics

       Gravimetry involves measurement in variations in the intensity of the earth's gravitational
field (expressed as acceleration in centimeters per second squared, or gals). Three principle
classes of instruments are used in conventional gravity measurements: torsion balance, pendulum,
and gravity meter or gravimeter (Lahee, 1961). All can detect anomalies as small as one-ten-
millionth  (milligals- 10"  gals) of the earth's gravitational field. Microgravimeters, measuring in
units of microgals (10" gals), are sufficiently sensitive that they can delineate cavities in the
subsurface. This type of instrument usually is used in hydrogeologic and contaminated site
investigations.

       Station measurements along a transect or on a grid require great care in setting up the
instrument, and the elevation of each station must be carefully surveyed. Gravity data obtained
in the field must be corrected for elevation, rock density, latitude, earth-tide variations, and the
influence  of surrounding topographic variations. After corrections, measurements are plotted as
Bouger anomaly maps, which look like topographic contour maps, and are interpreted in terms
of the size, shape, and position of subsurface structures.

       The most common use of gravity measurements for detecting bedrock valleys buried by
unconsolidated glacial materials and conducting regional-scale ground-water investigations.. Use
of gravity measurements for the characterization of fractures and the detection of subsurface
                                           6-6

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cavities has been reported infrequently in the last 30 years; however, such measurements have
been used at contaminated site at least a half-dozen times in the last 10 years (Table 6-3). For
example, Roberts et al. (1989) obtained gravity data at a landfill in Tippecanoe County, Indiana,
and compared this with gravitational estimates based on prelandfill topographic data to
determine density variations within the fill material; Section 1.53  in U.S. EPA (1993)
summarizes the advantages and disadvantages of gravity surveys.
6.4 Thermal Methods

       Measurements of temperature variations in the subsurface can be used as both a near-
surface and a borehole method.  Shallow geothermal measurements are a relatively simple
method for characterizing shallow ground-water flow and mapping contaminant plumes.
Borehole temperature logging is a common borehole geophysical method, which is covered in this
section on surface methods because there is not a clear dividing line between the two types of
measurements and some of the literature is equally applicable to both types of measurements.
Table 6-4 identifies references on soil temperature and other thermal property measurements,
shallow geothermal ground-water applications, and borehole temperature logging.

       6.4.1 Shallow Geothermal Measurements

       Because water has a high specific heat capacity compared to most natural materials, its
temperature changes slowly  as it migrates through the subsurface. Consequently, shallow-earth
temperatures can be related to the occurrence and flow of ground water (Cartwright, 1968a;
Birman, 1969). Shallow, moving ground water produces lower temperatures compared to dry,
shallow bedrock.

       Shallow geothermal measurements are usually made by measuring subsurface
temperatures at a selected depth (up to 40 inches) at numerous stations over a short time span.
In the late 1960s and early 1970s a number of shallow geothermal ground-water studies were
conducted (Table 6-4), and the method has been used infrequently at contaminated sites.
Cartwright and McComas (1968) used soil temperature surveys at several landfills in northeastern
                                          6-7

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Illinois. These surveys indicated the presence of a halo of higher temperatures around the
landfills, and indicated areas of surface recharge. Gilkeson and Cartwright (1983) review use of
shallow geothermic methods for ground-water monitoring and describe several other examples of
their use at contaminated sites.

       6.4.2 Borehole Temperature Logging

       Temperature measurement is one of the most commonly used borehole logging methods
because it is simple and inexpensive. A temperature log involves recording temperature relative
to depth with a temperature sensor, usually a thermistor mounted inside a cage or tube to
protect it and to channel the fluid past the sensor. Temperature logs taken shortly after the
cessation of drilling often provide an indication of the location of permeable strata. A
differential-temperature log involves recording the rate of change in temperature relative to
depth. Data can be obtained by computer calculation from a temperature log or by using a
specially designed logging probe that utilizes either two sensors with a vertical spacing or one
sensor and an electronic memory that compares the temperature at one time with those  taken at
previous times. A radial differential temperature tool  uses two highly sensitive temperature
probes that extend from the probe to contact the casing. As the probes are rotated, they
measure differences in temperature at two points on the casing 180 degrees,  apart. The probes
also can detect cooler water flowing behind a casing that has not been properly sealed.

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Table 6-1 Index to References on Ground Penetrating Radar
Topic
References
Report/General Papers
Symposia
Subsurface Dielectric
Properties
Texts: Benson et al. (1984), EC&T et al. (1990), Morey and Harrington
(1972), Lord and Koerner (1987a), Pilon (1992), Pitchford et al. (1988),
Pittman et al. (1974), Rehm et al. (1985), Redwine et al. (1985), Skolnik
(1990), Trabant  (1984), Uhiksen (1982), U.S. EPA (1987); Papers:  Annan
and Cosway (1992), Bjelm et al. (1983), Daniels (1989), Lepper and
Dennen (1990),  Moffat and Puskar (1976), Morey (1974), Olhoeft (1984,
1988-bibliography), Roberts et al.  (1992)

Hanninen and Autio (1992), Lucius et al. (1990), Soil Conservation
Service (1988)

Akhadov (1980), Daniel (1967), Hasted (1974), Hoekstra and Delaney
(1974), Kracchman (1970), Tareev (1975), van Beek (1965),   von Hippel
(1954a,b); Papers: Saint-Amant and Strangway (1970), Olhoeft (1990)
Continuous Microwave
Koerner and Lord (1985), Koerner et al. (1978, 1981), Lord and Koerner
(1982)
Applications: Subsurface Contamination
Contaminated Sites
Buried Containers




NAPL Detection



Leak Detection

SewagePlume
Barton and Ivanhenko (1991), Brewster et al. (1992 perchloroethylene),
Cichowicz et al. (1981), Cosgrove et al. (1987), Douglas et al. (1992),
Evans and Schweitzer (1984), Glaccum et al. (1982), Horton et al. (1981),
Koerner et al. (1981), Kuo and Stangland (1986), Folwer and Ayubcha
(1986), Hankins et al. (1991), Lawrence (1984), Osborne (1991-remote
controlled), Pease and James (1981), Roberts et al. (1989), Russell
(1990), Saunders et al. (1991), Smith and Markt  (1988), Stanfill and
McMillan (1985), Steams and Dialmann (1986),  Underwood and Bales
(1984 buried crystalline waste), White and Brandwein (1982)

Allen and Seelen (1992), Bowder et al. (1982), Hager et al.
(1991-USTs), Hatch (1987) Hogan (1988), Hu  et al. (1992), Koerner et
al. (1982), Lord and Koerner (1986, 1987a,b), Osborne  (1991-remote
controlled), Rudy and Warner (1986  USTs)

Annan et al, (1991), Cameron (1988), Cleff (1991), Daniels et al. (1992),
Olhoeft (1986, 1992), Olhoeft et al. (1992), Redman et al. (1991), Stanfill
and McMillan (1985)

Koerner and Lord (1985), Koerner et al. (1978, 1981)

Wright etal. (1984)
                                               6-9

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                                         Table 6-1 (cont.)
Topic
References
Applications: Subsurface  Characterization

Soil  Characteristics
Bedrock Depth

Fracture Detection


Karst Terrane

Moisture Profiles

Subsurface  Geology


Watershed  Delineation

Subsurface  Openings


Ground Water



Water Bodies


Wetlands
Collins and Doolittle (1987), Collins et al. (1986), Doolittle (1982, 1983,
 1987), Olson and Doolittle (1985), Puckett et al. (1986), Schellentrager et
al. (1988), Shih and Doolittle (1984), Truman et al. (1988), Zobeck et al.
(1985)

Collins et al. (1989)

Imse and Levine (1985), Leckenby (1982) Olson and Doolittle (1985),
Rubin and Fowler (1978), Ulriksen (1982)

Beck and Wilson (1988), Kuo and Stangland (1986)

Houck (1984)

Beres and Haeni (1991), Davis et al. (1984), Dolphin et al. (1978), Rubin
and Fowler (1978), Wright et al. (1984)

Asmussen et al. (1986)

Cook (1956, 1975), Filler and Kuo (1989), Fountain (1976), Friedel et al.
(1990), Leckenby (1982)

Beres and Haeni (1991), Davis et al. (1966), Johnson (1987), Sellman et
al. (1983), Shih et al. (1986), Taylor and Baker (1988), Wright et al.
(1984)

Beres and Haeni (1989), Gorin and Haeni (1989), Haeni (1992), Haeni et
al. (1987), Truman et al. (1991), Ulriksen (1982)
Watson et al. (1990)
GPR Applications: Miscellaneous
Abandoned Well
Location

Mining


Glaciers
Aller ( 1984)
Annan et al. (1988-potash mines), Cook (1973), Duckworth (1970),
Pittmanetal. (1984)

Harrison (1970), Watts and England (1976)
                                             6-10

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Table 6-2 Index to References on Magnetic Methods
Topic
References
Texts/Review  Papers
Applications

Abandoned Well
Location

Basalt Aquifers

Ground Water


Bedrock Depth Topgraphy


Contaminated Sites
Buried Drums/Metals
Other
Texts: Benson et al. (1984) Bozorth (195 I), Breiner (1973), EC&T
(1990), Chikazumi (1964), Nettleton (1971, 1976) Rehm et al. (1985),
U.S. EPA (1987), Zohdy et al. (1974); Papers: Hinze (1988) Kufs et al.
(1986-statistical modeling of data), Palermo and Brickell (1984) Reford
(1980); see also Table 1-4 for general geophysics texts covering magnetic
methods
Aller (1984), Martmek (1988)
Harmon (1984), Mabey and Oriel (1970)

Joiner et al. (1967), Ram Babu et al. (1991), Stierman et al. (1986)
Wilson et al. (1970)

Birch (1984), Ghatge and Pasicznyk (1986), Mabey and Oriel (1970)
Ram Babu et al. (1991), Wire et al. (1984) Wynn (1979)

Benson (1991), Allen and Rogers (1989), Blasting (1987), Carr et al.
(1990), Evans and Schweitzer (1984), Feld et al. (1983), Fowler and
Ayubcha (1986), Fowler and Pasicznyk (1985), Gilkeson et al. (1986)
Gihner and Helbling (1984), Hitchcock and Harman (1983) Lord and
Koerner (1986, 1987a,b), Palermo and Brickell (1984), Pitchford et al.
(1988), Regan et al. (1987), Roberts et al. (1989) Smith and Markt
(1988), White and Brandwein (1982)

Allen and Seelen (1992), Barrows and Rocchio (1990), Emilsson and
Morin (1989), Gilkeson et al. (1992), Hager et al. (1991-USTs), Hatch
et al. (1987), Koerner et al. (1982), Lord and Koerner (1987a,b), Rudy
and Warner (1986-USTs), Schlinger (1990-USTs),  Schutts and Nichols
(1991), Struttmann and Anderson (1989), Walsh (1989)

Landslide Processes: Bogoslovsky and Ogilvy (1977): Abandoned Iron
Ore Mining Area: Cohen etal. (1992)
                                          6-11

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Table 6-3 Index to References on Gravity Methods
Topic
References
Texts



Review Papers

Microgravity Survey


Applications

Contaminated Sites


Ground Water
Bedrock Topography/
Buried Valleys
Unconsolidated Deposits

Fracture Zones

Karst/Cavities
Lahee (1961), Nettleton (1971, 1976) Rehm et al. (1985), Redwine et al.
(1985), USGS (1980); see also Table 1-4 for general geophysics texts
covering gravimetric methods

Butler (1991), Hinze (1988) LaFehr (1980)

Arzi (1975), Blivkovsky (1979), Fajkewicz (1976), Dahlstrand (1985) Imse
and Levine (1985), Poeter (1989), Stewart and Wood (1986)
Benson. (1991), Bruehl (1983, 1984) Fowler and Ayubcha (1986), Kick
(1989), Regan et al. (1987), Roberts et al. (1989), Rodrigues (1987)

Adams et al. (1975), Ali (1985), Ali and Whitely (1981), Carmichael
(1976), Carmichael and Henry (1977), Eaton and Watkins (1970)
Frohlich (1978), Joiner and Scarbrough (1969) Marshall (197 I), Mattick
et al. (1973), Poeter (1989) Spangler and Libby (1968) Strange (1970)
Van Overmeeren (1980, 1981), Wallace and Spangler (1970), West and
Sumner (1972), Worthington. (1975) Wrege (1986)

Adams et al. (1975), Alvarez (1991), Burgdorf and. Richard (1984),
Carmichael and Henry (1977), Denne et al. (1984), Ghatge and Pasicznyk
(1986), Hall and Hajnal( 1962),. Hansen (1984), Heigold et al. (1964),
Henry (1984); Ibrahim and Hinze (1972), Lennox and Carlson (1967,
 1970), Mabey (1960) Mabey and Oriel (1970), McGinnis et al. ( 1963)
O'Brien and Stone (1984, 1985) Richard and Wolfe (1990), Stewart
(1980), Van Overmeeren (1980), Wilson et al. (1983)

Tibbets and  Scott  (1972)

Imse and Levine (1985), Stewart and Wood (1986)

Am (1977),  Butler (1977, 1984), Colley (1963), Dahlstrand (1985),
Fajkiewicz (1976) Fountain (1976), Omnes (1977)
                                          6-12

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Table 6-4 Index to References on Shallow and Borehole Thermal Methods
Topic
References
Texts
Basic Soil Thermal
Properties

Soil Temperature
Measurement of Soil
Thermal Properties
Eve and Keys (1954), Gougel (1976), Howell (1959), Jessup (1990), Rehm
et al.  (1985),  Sharma (1986), Sheriff (1989), Bibliography:  Summer (1971)

Carlslaw (1986), de Vries (1963, 1975), Kersten (1949), Lee (1965),
Farouki (1981), Wierenga et al. (1969)

Buchan (199 I), Taylor and Jackson (1986a), Morrison (1983), Smith et al.
(1960)

Beck et al. (1971), Flint and Childs (1987), Fuchs (1986), Fuchs and
Hadas (1973), Hares et al. (1985), Morton et al. (1983), Jackson and
Kirkham (1958), Jackson and Taylor (1986), Kimball and Jackson (1975),
Kimball et al. (1976), Lettau (1971), Sophocleous (1979), Taylor and
Jackson (1986b), Weaver and Campbell (1985)
Shallow Ground-Water Applications
Measurement Methods

Aquifer Thermal
Storage Properties

Ground-Water Detection
Subsurface Flow
Geology
Contaminated Sites
Misener and Beck (1960), Stevens et al. (1975)

Parr et al. (1983), Schaetele et al. (1980)
Bair and Parizek (1978-permeabihty variations), Birman (1969), Brown
et al. (1983), Cartwright (1968a,b, 1974), Jansen (1990), Jansen and
Taylor ( 1989), Kremar and Masin (1970), Parsons (1970); Unpublished
Ph.D Theses: Cartwright (1973), O'Brien (1970), Supkow, (1971)

Infiltration/Recharge: Boyle and Saleem (1979), Nightingale (1975),
Randall (1986), Schneider (1962), Suzuki (1960); Ground-Water Flow:
Brown et al. (1983), Cartwright (1970), Domenico and Palciauskas (1973),
Jansen  (1992), Lapham (1989), Schneider (1962),  Stallman (1963,  1965);
Temperature as Tracer: Davis et al. (1985), Keys and Brown (1978),
Rorabaugh (1956), Sampayo and Wilke (1963)

Buried Valley Detection: Denne et al.  (1984), Smith (1974); Fracture
Detection: Howard et al. (1986), Jansen and Taylor  (1988, 1989), Morin
and Barash (1986), Silliman et al. (1987), Trainer (1968), Westphalen
(1991), Williams et al. (1984), Yearsley et al (1990)

Cartwright and McComas (1968), Gilkeson and Cartwright (1982, 1983),
Gilkeson et al. (1984), Yazicigil and Sendlein (1982)
                                           6-13

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                                        Table 6-4 (cont.)
Topic
References
Borehole
Temperature Logs


Temperature Gradient
J4P

Fracture Connections

Vertical Velocity


Borehole Case Studies
Brown et al. (1983) Guyod (1946), Norris and Spieker (1962a,b), Nowak
(1953), Peacock (1965), Sammel (1968), Trainer (1968)

Conaway (1977), Conaway and Beck (1977)
Sillman and Robinson (1989)

Bredehoeft and Papadopulos (1965), Newman and McDuff (1988) Sorey
(1971), Stallman (1963)

Emilsson and Arnott (1991), Howard et al. (1986), Michalski (1989)
Morin and Barrash (1986), Silliman et al. (1987), Sutchffe and Joyner
(1966), Williams et al. (1984), Westphaien (1991), Williams and Conger
(1990), Yearsley et al. (1990)
                                            6-14

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 6.5 References

 See Glossary for meaning of method abbreviation.

 Adams, J.M., W.J. Hinze, and L.A. Brown.  1975. Improved Application of Geophysics to Groundwater
        Resource Inventories in Glaciated Terrains. Water Resources Research Center Tech. Report No.
        59 (NTIS PB244-879). Purdue University, West Lafayette, IN. [GR, IP]

 Akhadov, Y. 1980. Dielectric Properties of Binary Solutions. Pergamon, New York, 475 pp.

 Ali, H.O. 1985. Gravity and Seismic Refraction Measurements for Deep Ground Water Search in
        Southern Darfur Region, Sudan. In: NWWA Conference on Surface and Borehole Geophysical
        Methods and Ground Water Investigations (2nd, Fort Worth, TX), National Water Well
        Association,  Dublin, OH, pp.  106-120.

 Ali, H.O. and R.I. Whiteley. 1981. Gravity Exploration for Groundwater in the Bara Basin,  Sudan.
        Geoexploration  19:127-  141.

 Allen, R.P. and B.A. Rogers.  1989. Geophysical Surveys in Support of a Remedial
        Investigation/Feasibility Study at the Municipal Landfill in Metamora, Michigan. In: Proc. 3rd
        Nat. Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH, pp. 1007-1020. [ER, MAG, SRR]

 Allen, R.P. and M. A. Seelen.   1992. The Use of Geophysics in the Detection of Buried Toxic Agents at a
        U.S. Military Installation. In: Current Practices in Ground Water and Vadose Zone
        Investigations, ASTM STP 1118, D.M. Nielsen and M.N. Sara (eds.), American Society for Testing
        and Materials, Philadelphia, PA, pp. 59-68. [MAG, EMI, GPR]

 Aller, L. 1984. Methods for Determining the Location of Abandoned Wells. EPA/600/2-83/123 (NTIS
        PB84-141530),  130 pp. Also published in NWWA/EPA Series, National Water Well Association,
        Dublin, OH. [air photos, color/thermal IR, ER, EMI, GPR, MD, MAG, combustible gas
        detectors]

Alvarez, R. 1991. Geophysical Determination  of Buried Geological Structures and Their Influence on
        Aquifer Characteristics.  Geoexploration 27:1-24. [tellurics,  gravity]

 Annan,  A.P. and  SW. Cosway. 1992. Ground  Penetrating Radar Survey Design. In: SAGEEP '92;
        Society of Engineering and Mineral Exploration Geophysicists, Golden, CO, pp. 329-352.

Annan, A.P., J.L. Davis, and D. Gendzwill. 1988. Radar Sounding in Potash Mines, Saskatchewan,
        Canada. Geophysics 53(12): 1556-1564.

Arman,  A.P., P. Bauman, J.P. Greenhouse, and J.D. Redman. 1991. Geophysics and DNAPLs.  In:
        Ground Water Management 5:963-977 (5th NO AC). [GPR]

Ani, A.A. 1975. Microgravimetry for Engineering Applications. Geophysical Prospecting 23(3):408-425.

Arzi, A.A.  1977.  Remote Sensing of Subsurface Karst by Microgravity (Abstract). In: Karst
        Hydro geology: Proceedings of the Twelfth Meeting of the International Association of
       Hydrogeologists, J.S. Tolson, andF.L. Doyle (eds.), University of Alabama-Huntsville Press,
       Huntsville, AL, pp.  271-172.
                                            6-15

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Asmussen, L.E., H.F. Perkins, and H.D. Allison. 1986. Subsurface Descriptions by Ground-Penetrating
       Radar for Watershed Delineation. Ga. Agric. Exp. Sta. Res. Bull. 362, Athens.

Bair, E.S. and R.R. Parizek. 1978. Detection of Permeability Variations by a Shallow Geothermal
       Technique. Ground Water 16(4):254-263.

Barrows, L. and J.E. Rocchio. 1990. Magnetic Surveying for Buried Metallic Objects.  Ground Water
       Monitoring Review 10(3):204-211.

Barton, G.J. and  T. Ivanhenko.  1991. Electromagnetic Terrain Conductivity  and Ground Penetrating
       Radar Investigations at and Near the CIBA-GEIGY Super-fund Site, Ocean County, New Jersey:
       Quality Control Assurance Plan and Results. In: Proc. (4th) Symp. on the Application of
       Geophysics to Engineering and Environmental Problems, Soc. Eng. and Mineral Exploration
       Geophysicists, Golden, CO, pp. 357-360.

Beck, B.F. and W.L.  Wilson. 1988. Interpretation of Ground Penetrating Radar Profiles in Karst
       Terrane. In: Proc. Second Conf.  on Environmental Problems in Karst Terranes and Their
       Solutions (Nashville, TN), National Water Well Association, Dublin, OH, pp. 347-367.

Beck, A, F. Anglin, and J. Sass. 1971. Analysis of Heat Flow Data*cll 4 in situ thermal Conductivity
       Measurements. Can. J. Earth Sci. 8:1-19.

Benson, R.C. 1991. Remote Sensing and Geophysical Methods for Evaluation of Subsurface Conditions.
       In: Practical Handbook of Ground-Water Monitoring, D.M. Nielsen (ea.), Lewis Publishers,
       Chelsea, MI, pp. 143-194. [GPR, EMI, TDEM, ER, SRR, SRL, GR, MAG, MD, BHJ]

Benson, R.C., R.A. Glaccum,  and M.R.  Noel. 1984. Geophysical Techniques  for Sensing Buried Wastes
       and Waste Migration. EPA 600/7-84-064 (NTIS PB84-198449), 236 pp. Also published in 1982 in
       NWWA/EPA series by National Water Well Association, Dublin, OH. [EMI, ER,  GPR, MAG,
       MD, SRR]

Beres, Jr., M. and P.P. Haeni. 1991. Application of Ground-Penetrating Radar Methods in
       Hydrogeologic Studies. Ground Water 29:375-386.

Birch, F.S.  1984. Bedrock Depth Estimates from Ground Magnetometer Profiles. Ground Water
       22(4):427-432.

Birman, J.H. 1969. Geothermal Exploration of Ground Water. Bull.  Geol. Soc. Am. 80(4):617-630.

Bjelm, L., S.G.W. Follin, and C.  Svensson.  1983. A Radar in Geological Subsurface Investigations. Bull.
       Int.  Ass. Eng. Geol. 26/27:10-14.

Blasting, J.F. 1987. Characterization of an Abandoned Waste Site Using Proton Magnetometry and
       Computer Graphics. In: Proc. First Nat. Outdoor Action Conf. on Aquifer Restoration, Ground
       Water Monitoring and Geophysical Methods, National Water Well Association, Dublin, OH, pp.
       573-584.  [MAG]

Blizkovsky, M. 1979. Processing and Application in Microgravity Surveys. Geophysical Prospecting
       23(3):408-425.
                                            6-16

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Bogoslovsky, V.V. and AA. Ogilvy. 1977. Magnetometric and Electrometric Methods for the
       Investigation of the Dynamics of Landslide Processes.  Geophysical Prospecting 25(3):280-291.
       [SP, MAG]

Bowder, J.J., Jr., R.K. Koerner, and A.E. Lord, Jr.  1982. Buried Container Detection Using Ground
       Probing Radar. J. Hazardous Materials 7: 1-17.

Boyle, J.M. and Z.A. Saleem. 1979. Determination of Recharge Rates Using Temperature-Depth Profiles
       in Wells. Water Resources Research 15(6):1616-1622.

Bozorth, R.M. 1951. Ferromagnetism. Van Nostrand Co., New York, 968 pp.

Bredehoeft, J.D. and I.S. Papadopulos.  1965. Rates of Vertical Groundwater Movement Estimated from
       the Earth's Thermal Profile. Water Resources Research l(2):325-328.

Breiner, S. 1973. Applications Manual for Portable Magnetometers. Geometries, Sunnyvale, CA, 58 pp.

Brewster, M.L., J.D. Redman, and A.P. Annan. 1992. Monitoring of a Controlled Injection of
       Perchloroethylene in a Sandy Aquifer with Ground Penetrating Radar and Time Domain
       Reflectometry. In: SAGEEP '92, Society of Engineering and Mineral Exploration Geophysicists,
       Golden, CO, pp. 611-618.

Brown, R.H., A..A Konoplyantsev, J. Ineson, and V.S. Kovalensky. 1983. Ground-Water Studies: An
       International Guide for Research and Practice. Studies and Reports in Hydrology No. 7.
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Struttmann, T. and  T. Anderson. 1989. Comparison of Shallow Electromagnetic and the Proton
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                                              6-33

-------
       In:  Superfund '89, Proceedings of the 10th Annual Conference, Hazardous Material Control
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                                             6-34

-------
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-------
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        [acoustic waveform, temperature, resistivity, brine tracing]
                                              6-36

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Zobeck, T.M., J.G. Lyon, D.R. Mapes, and A. Ritchie, Jr. 1985.  Calibrating Ground-Penetrating Radar
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        116pp. [ER, GR, MAG, SRR]
                                            6-37

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                                           CHAPTER 7
                                   BOREHOLE  GEOPHYSICS
7.1 Overview of Downhole  Methods

        Borehole geophysics is the science of recording and analyzing continuous or  point
measurements of physical properties  made  in  wells  or test holes (Keys,  1990).  The  terms
borehole  and downhole are used  interchangeably  to  refer to  such  measurements.  Most  specific
borehole geophysical techniques have long been in use  by the petroleum industry,  where holes
being logged are usually deep  and filled with drilling muds or saline water. Many  of these
techniques are not suitable,  or must  be adapted,  for  use in  freshwater aquifers,  which are the
focus  of  near-surface  hydrogeological investigations.  Nevertheless,  suitable borehole  geophysical
methods can  greatly enhance  the  geologic and  hydrogeologic  information obtained from water
supply  or monitor  wells. The  development of logging tools specifically designed for use in
freshwater wells, such  as  the  EM39  borehole  conductivity meter  (McNeill,  1986), and high-
precision  thermal  and  electromagnetic  borehole  flowmeters  should  contribute  to greater  use of
downhole  methods in  the future.

        7.1.1  Requirements  of Borehole Methods

        The characteristics of the borehole to be  logged may place  constraints  on the type of
borehole logging method  that can  be  used—the  primary  consideration  when identifying borehole
logging methods of potential value for a  specific  situation. Table 7-1  lists  important
characteristics of 41  borehole logging  methods with  potential  for application  at contaminated
sites. These  characteristics  include:
               Whether a casing  is  present.  Electric methods,  for example,  require uncased
               holes.
               If  cased, the type of casing.  Borehole radar, for example,  can be used with  a
               polyvinyl chloride (PVC) casing, but not with  a  steel casing.
                                               7-1

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Table 7-1 Characteristics of Borehole Logging Methods (information for general guidance only)
Log Type/Section
Electrical Logs (7.3.1)'
Spontaneous
Potential (3. 1.1)
Single-Point
Resistance (3.1.2)
Fluid Conductivity (3. 1.3)

Resistivity (3. 1.4)

Dipmeter (3.1.5)

Induced Polarization (3.1.6)
Cross-Well AC
Voltage (3. 1.6)
Electromagnetic Logs (7.3.1)'
Induction (3.2.1)

Borehole Radar (3.2.2)

Dielectric (3.2.3)

Nuclear Magnetic
Resonance (3.2.4)
Surface-Borehole
CSAMT (3.2.4)
Nuclear Logs (7.3.2)'
Natural Gamma (3.3.1)



Gamma-Gamma (3.3.2)


Neutron (3.3.3)


Gamma Spectrometry
(3.3.4)
Casing*

Uncased only

Uncased only

Uncased or
screened
Uncased only

Uncased only

Uncased only
Uncased only


Uncased or
nomnetallic
Uncased or
nonmetallic
Uncased or
nonmetallic
Uncased

Uncased only
(?)

Uncased or
cased


Uncased or
eased

Uncased or
cased

Uncased or
cased
Min.
Diam.*
(in.)

1.5-3.0

1.5-2.0

2.0-2.5

2.0-5.5

7-6.0

2.0
f


2.0-4.0

2.0-6.0

5.0

7

?


1.0-2.0



2.5


1.5-4.5


2.0-4.0

* Borehole
Fluid

Conductive
fluid
Conductive
fluid
Conductive
fluid
Conductive
fluid
Conductive
fluid
Conductive
Wet or
dry

Wet or
dry
Wet or
dry
Wet or
dry
Required

Wet or
dry(?)

Wet or
dry


Wet or
dry

Wet or
dry

Wet or
dry
Radius of
Measurement

Near borehole
surface
Near borehole
surface
Within
borehole
<1-60 in.

Near borehole
surface
2-4 ft
10s to 100s
of meters

30 in.

meters

30 in.

1.5ft

?


6-12 in.



6 in.


6-12 in.


6-12 in.

Required Correction

Drilling fluid resistivity and
borehole diameter for quantitative uses.
Not quantitative; hole
diameter effects significant.
Calibration with fluid of known
salinity; temperature correction.
Drilling fluid resistivity, borehole diameter,
and temperature log for quantitative uses.
Orientation; minimum of 6" diam. required
for accurate joint/fracture characterization.
Hole diameter.
Borehole deviation.


Effect of hole diameter and mud
negligible.
Borehole deviation (cross-hole).

Conductive material skin depth, chlorine
interference.
Borehole fluid.

9


None for qualitative uses.
Hole diameter, casing (thickness,
composition, size), and drilling fluid density
for quantitative uses.
Same as natural gamma with
addition of formation fluid and matrix
density corrections.
Same as natural gamma with
addition of temperature, fluid salinity, and
matrix composition corrections.
Similar to natural gamma

                                                        7-2

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Log Type/Section
Nuclear Logs (cont.)
Neutron Activation
(3.3.5)
Neutron Lifetime
(3.3.6)
Acoustic and Seismic Logs (7.
Acoustic Velocity/***
sonic (3 .4.1)
Acoustic Waveform***
(3.4.2)
Acoustic Televiewer
(3.4.3)
Surface-Borehole
Seismic (3.4.4)
Geophysical Diffraction
Tomography (3.4.5)
Cross-Borehole
Seismic (3.4.6)


Casing*

Uncased or
cased
Uncased or
cased
,3.3)'
Uncased or
bonded metallic
Uncased or
bonded metallic
Uncased
Uncased or
bonded cased
Uncased or
nonmetallic
Cased or
uncased

Min.
Diam.**
(in.)

2.0-4.0

2.0-4.0

2.0-4.0
2.5-3.0
3.0 min
16.0 max
2.5-4.0
2.5-4.0
2.0-3.0
Table 7-1

Borehole
Fluid

Wet or
dry
Wet or
dry
Required
Required
Required
Wet or
dry
Wet
Wet or
dry
(cont.)

Radius of
Measurement

< Neutron

< Neutron

Depends on
frequency and
rock velocity
several feet
> sonic
Borehole
surface
Depends on
geophone
configuration
100ft
Depends on
borehole spacing


Required Correction

7

7

Hole diameter, formation fluid
and matrix velocity corrections
for quantitative uses.
Same as sonic?
Large number of equipment
adjustments required during operation
(calibration of magnetometer), borehole
diameter response, borehole deviation.
Borehole deviation, correction for
geometric spreading of source energy
geophones must be locked in dry holes.
Borehole deviation.
Borehole deviation.
Miscellaneous Logging Methods (7.4.1)'
Caliper (3.5.1)
Temperature (3. 5. 2)
Mechanical Flowmeter
(3.5.3)
Thermal Flowmeter
(3.5.4)
EM Flowmeter
(3.5.5)
Single-Borehole
Flow Tracing (3.5.6)
Colloidal Boroscope (3.5.7)
Uncased or
cased
Uncased or
cased****
*****
*****
*****
*****
*****
1.5+
2.0
2.0-4.0
2.0
2.0
1.75+
2.0
Wet or
dry
Required
Required
Required
Required
Required
Required
Arm limit
(usually 2-3 ft.)
Within
borehole
*****
*****
*****
*****
*****
None.
Calibration to known standard.
Borehole diameter for velocity and
volumetric logging.
Borehole diameter for velocity and
volumetric logging.
Borehole diameter for velocity and
volumetric logging.
Changes in flow field with time.
None.
7-3

-------
                                                           Table 7-1 (cont.)
Log Type/Section
Miscellaneous Logging
Television/Photography
(3.5.7)
Gravity (3.5.8)
Magnetic/Magnetic
Susceptibility (3.5.8)
Well Construction Logs
Casing Collar Locator
(3.6.1)
Cement and Gravel
Pack Logs (3.6.2)
Borehole Deviation
(3.6.3)
Casing*
Methods (cont.)
Uncased or
cased
Uncased best
Uncased or
nonmetallic
(7.4.2)'
Steel
Casing
Cased
Uncased
Min.
Diam.*:
(in.)

2.0+
6.0
9

2.0+
* Borehole
Fluid

Wet or
dry
Wet or
dry
Wet or
dry

Wet or
dry
See specific logging
Varies
Wet or
dry
Radius of
Measurement

Borehole
surface
10s to 100s
of meters
1-2 ft

Casing collar,
thickness
methods discussed in this
Borehole
Surface
Required Correction

None.
Borehole diameter/inclination; other usual
gravity corrections
Hole diameter correction.

o
section.
Magnetic declination.
Fluid/Gas Chemical Sensors1
Eh, pH Probes (3.5.4)
Ion-Selective Electrodes
Uncased/screened
Uncased/screened
2.0-6.0
2.0-6.0
Required
Required
Within borehole
Within borehole
Calibration to known standards.
Calibration to known standards.
(3.5.5)

Fiber Optic Chemical
Sensors  (5.5.6)

Other Chemical Sensors
(10.6.5)
Uncased/screened 2.0       Wet or dry     Within borehole


Uncased/screened 2.0-6.0    Wet or dry     Within borehole
Calibration to known standards.


Calibration to known standards.
Boldface = Most frequently used techniques in ground-water investigations.

'Underlined number in parentheses indicates cross-reference to this guide; other numbers in parentheses are section numbers in U.S. EPA
(1993) where additional information can be found on the specific methods.
'Borehole chemical sensors are not covered in this reference guide. See section numbers indicated in U.S. EPA (1993) for additional
information on these techniques.
Note: Question mark (?) indicates that the information could not be found by the author in readily available sources.

* Unless otherwise specified, either plastic or steel casing is possible.
** Indicates range of minimum diameters for commercially available probes based on best available information. Various sources were used,
with the survey by Adams et al. (1983) serving as the main source.
*** Wheatcraft et al. (1986) indicate that acoustic  logs are suitable only for uncased boreholes. However,  Thornhill and Benefield (1990)
report using them for mechanical integrity tests of steel-cased  injection wells.
**** Wheatcraft et al. (1986) indicate that casing is allowable for temperature logs. Benson (1991)  indicates that casing should not be used.
Uncased holes are required for identification of high-permeability zones.  Cased hole uses would include measurement of geothermal gradient
and cement bond logs (see Section 3.6.2).
***** Flow measurements are usually made in uncased holes or screened intervals of cased holes.  Radius of measurement depends on
permeability and whether natural or induced flow is measured. Natural flow will measure the properties  of several well  diameters; pumping will
measure properties up to 25 to 35 well diameters (Taylor, 1989).
                                                          7-4

-------
               Borehole  diameter must be  large  enough  for  the  instrument  of interest.  Some
               logs  (e.g., dielectric and  nuclear  magnetic resonance  logs)  require  borehole
               diameters that are considerably larger than are typically  drilled  for monitoring
               wells at contaminated  sites.
               Whether borehole  fluid (e.g., ground water or  drilling  fluid)  is  present. Electric
               logs, sonic  logs, and any fluid characterization  log  require borehole  fluid.
               The radius  of measurement  of  specific methods can range  from near the  borehole
               surface  (spontaneous potential  and SP resistance logs) to more than  100 meters
               for borehole radar in highly resistive rock.
               Many logging methods require  calibration  or  corrections for such factors as
               temperature,  borehole  diameter,  and  fluid resistivity.
        The most commonly used  borehole logging methods in hydrogeologic  and contaminated
site  investigations  involve spontaneous  potential (SP), single-point resistance, fluid conductivity,
natural gamma,  gamma-gamma, neutron,  sonic, caliper, temperature,  and flowmeters.  The
nuclear logging methods listed in Table 7-1 are especially versatile because  they  can be used  in
cased  monitoring wells.

        7.1.2 Applications of Borehole Methods

        A bewildering number  of  specific borehole logging methods are  available, and papers
describing new methods or innovative adaptation  of older  methods appear every  year.
Schlumberger (1974) lists almost four dozen,  and  Keys  (1990)  lists more  than  two dozen  that
have  potential applications  in  ground-water  investigations.   Equally confusing to  the uninitiated is
the fact that the same logging  technique  may  be  called  by  several different  names. For example
the terms gamma-gamma  and density  are  commonly  used for the  same log,  and acoustic-
waveform logs also are called variable  density, three-dimensional  (or 3D) velocity, and full
waveform sonic  logs (see Table 7-7). The summary  tables  covering major logging methods in
later sections  of this chapter list the  most common  alternative names  for specific  methods and
the names of major variants  of  certain types  of logs.

        The 41 methods identified in Table 7-1  have been identified in U.S.  EPA (1993) as
having  potential  applications at contaminated  sites.  Table  7-2  identifies  relevant  borehole
                                                 7-5

-------
 Table 7-2 Summary of Borehole Log Applications
 Required Information
 Potential Logging Techniques
 Lithology, Stratigraphy, Formation Properties

 General Lithology and Stratigraphic Correlation



 Bed Thickness


 Cavity Detection

 Sedimentary Structure Orientation

 Large Geologic Structures

 Total Porosity/Bulk Density



 Effective Porosity

 Clay or Shale Content

 Relative Sand-Shale Content

 Grain Size/Pore Size Distribution



 Compressibility/Stress-Strain Properties

 Geochemistry

Aquifer Properties

Location of Water Level or  Saturated Zones


 Moisture Content


Permeability/Hydraulic Conductivity
Secondary Permeability-Fractures, Solution
Openings
Specific Yield of Unconfmed Aquifers
 Electric (SP, single-point resistance, normal and focused resistivity, dipmeter, IP, cross-
 well AC voltage); EM (induction, dielectric); all nuclear (open or cased holes); caliper
 logs made in open holes, borehole television.

 Single-point resistance, focused resistivity (thin beds), gamma, gamma-gamma, neutron,
 acoustic velocity.

 Caliper, acoustic televiewer, cross-hole radar, cross-hole seismic.

 Dipmeter, borehole television, acoustic televiewer.

 Gravity, surface-borehole/cross-hole seismic, cross-hole radar.

 Calibrated dielectric, sonic logs in open holes; cross-hole radar; calibrated neutron,
 neutron lifetime, gamma-gamma logs, computer-assisted tomography (CAT) in open or
 cased holes; nuclear magnetic resonance, induced polarization, cross-hole seismic.

 Calibrated long-normal and focused resistivity or induction logs.

 Gamma log, induction log, IP log.

 Gamma, SP log.

 Grain size: possible relation to formation factor derived from electric, induction or
 gamma logs; Pore size distribution: nuclear magnetic resonance: Soil macroporosity:
 computerized axial tomography (CAT).

 Acoustic waveform, uphole/downhole seismic, cross-hole seismic

 Neutron activation log, spectral-gamma log.
Electric, induction, acoustic velocity, temperature or fluid conductivity in open hole or
inside casing. Neutron or gamma-gamma logs in open hole or outside casing.

Calibrated neutron logs, gamma-gamma logs, nuclear magnetic resonance,
computerized axial tomography (CAT).

No direct measurement by logging.  May be related to porosity, single borehole  tracers
methods (injectivity), 2-wave sonic amplitude, temperature, nuclear magnetic
resonance. Estimation may be possible using vertical seismic profiling.

Caliper, temperature, flowmeters (mechanical, thermal, EM), sonic, acoustic
waveform/televiewer, borehole television logs, SP resistance, induction logs, cross-well
AC voltage,  surface-borehole CSAMT, vertical seismic profiling, cross-hole seismic.

Calibrated neutron logs during pumping.
Ground-Water Flow and Direction

Infiltration
Temperature logs, time-interval neutron logs under special circumstances or radioactive
tracers.
                                                           7-6

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                                                          Table 7-2 (cont.)
Required Information
Potential Logging Techniques
Ground-Water Flow and Direction (cont.)

Direction, Velocity, and Path of Ground-Water
Flow

Source and Movement of Water in a Well
Borehole Fluid Characterization

Water Quality/Salinity


Water Chemistry

Pore Fluid Chemistry
Mudcake Detection

Contaminant Characterization

Conductive Plumes

Contaminant Chemistry

Hydrocarbon Detection

Radioactive  Contaminants

Dispersion, Dilution, and Movement of Waste


Buried Object Detection

Borehole/Casing Characterization

Determining Construction of Existing Wells,
Diameter and Position of Casing, Perforations,
Screens

Guide to Screen Setting


Borehole Deviation

Cementing/Gravel  Pack


Casing Corrosion/Integrity

Casing Detection/Logging


Casing Leaks and/or Plugged Screen

Behind Casing Flow
Thermal flowmeter single-well tracer techniques—point dilution and single-well
pulse; multiwell tracer techniques.

Infectivity profile mechanical, thermal, EM flowmeters; tracer logging during
pumping or injection; temperature logs.
Calibrated fluid conductivity and temperature; SP log, single-point resistance,
normal/multielectrode resistivity, neutron lifetime.

Dissolved oxygen, Eh, pH probes; specific ion electrodes.

Induced polarization log, neutron activation (if matrix effects can be accounted
for).

Microresistivity, caliper, acoustic televiewer.
Induction log, resistivity, surface-borehole CSAMT.

Specific ion electrodes, fiber optic chemical sensors.

Dielectric log, IP log.

Spectral gamma log.

Fluid conductivity and temperature logs, gamma logs for some radioactive wastes,
fluid sampler.

Geophysical diffraction tomography.



Gamma-gamma, caliper, collar, and perforation locator, borehole television.
All logs providing data on the lithology, water-bearing characteristic, and
correlation and thickness of aquifers.

Deviation log, dipmeter, single-shot probe, dolly and cage tests.

Caliper, temperature, gamma-gamma; acoustic waveform for cement bond;
noise/Sonan  log.

Borehole television/photography, under some conditions caliper or collar locator.

Casing collar locator, borehole television/photography various electric, nuclear
and acoustic logs.

Tracer and flowmeters.

Neutron activation and neutron lifetime logs.
                                                           7-7

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 methods  for  almost 40 specific  applications in the following categories: lithology, stratigraphy,
 and  formation  properties; aquifer properties;  ground-water flow  and  direction,  borehole fluid
 characterization;  contaminant characterization; and borehole/casing  characterization.  Table  7-14
 indexes  over 100  references  on  applications of borehole  geophysics at contaminated  sites,  and for
 lithologic  and hydrogeologic  applications.  Appendix A (Table  A-2)  provides  summary
 information  on 9  cases studies involving uses of borehole  geophysics at contaminated sites.

        7.1.3 Geophysical Well Log Suites

        Rarely is  a single  logging method  used since  many logs require  other logs for
 interpretation.  Even  when they are not  mandatory, multiple logs  may  interact  synergistically  to
 provide  more information than individual  logs. For example,  the  minerals gypsum  and  anhydrite
 can be distinguished  by interpreting gamma and  neutron  logs together.  Figure  7-1 shows typical
 responses  of three electrical  logs (spontaneous  potential,  single-point resistance,  and long-normal
 resistivity-see  Section  7.3.1),  two nuclear  logs (gamma and  neutron—see Section 7.3.2),  and
 three other types  of  logs  (acoustic velocity, caliper,  and  temperature).  In  the  figure, the
 individual logs do not always  show changes with  a change  in lithology, but for individual strata,
 one or more logs  show  changes  in measured  properties at  the  top and bottom  of the formation.
 Figure 7-2  shows  a  similar suite  of  logs for a hypothetical hole in crystalline  rock.  Of particular
 interest in this figure is  the  ability of the  logs to locate  fractured  and altered  material that may
 serve  as  preferential  flow paths   for  contaminated  ground water. As with  surface  geophysical
 methods,  most downhole  methods require  considerable  training and skill  in recording and
 interpreting  data.

        7.1.4  Guide to Major  References

        Table 7-3  provides information on  over 30 general  texts on borehole geophysical methods
 and log interpretation. Documents identified in this table published by  Birdwell  and Dresser
Atlas are no  longer  available  because these  divisions  are  no longer providing  geophysical logging
services. Hydrogeologic and  geophysical  consulting firms,  however, may  have  these documents in
their  files.  Documents published  by  Schlumberger  Educational  Services  (5000  Gulf Freeway,
Houston,  TX 77023)  are  available and  periodically updated.
                                                7-8

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    Gamma    Neutron
Acoustic Velocity
Caliper
          Spontaneous
Lithology Potential
Long-Normal
Resistivity
                                                                                        Single-Point
                                                                                        Resistance
                                                                           Temperature
Figure 7-1    Typical response of a suite of hypothetical geophysical well logs to a sequence of sedimentary rocks
             (from  Keys, 1990).
                                                        7-9

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      Caliper
Gamma    Lithology      Neutron
Acoustic
Velocity
Resistivity
                     Fractured
                       and  —
                      Altered
                               j Weathered!?:
                               :• or Altered 1*1
                              jjj'Granite :-J?5
                               ; Fractured
                               ;and Altered ;
                              : Biotite Schist -:
                              ".".GranodioriteV,

                              g'Peamatite jv
Figure 7-2 Typical response of a suite of hypothetical geophysical well logs to various
             altered and fractured crystalline rocks (from Keys, 1990).
                                             7-10

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Table 7-3 General Texts on Borehole Geophysical Logging and Interpretation
Reference
Description
Asquith and Gibson (1982)

Birdwell  Division (1973)
Doveton (1986)
Dresser Atlas (1974,
1975, 1976,  1982)
Ellis (1987)

Foster and Beaumont (1990)



Hearst and Nelson (1985)

Helander (1983)


Hilchie (1982a)



Hilchie (1982b)

Labo (1987)

LeRoy et al. (1987)


Lynch  (1962)

Nelson (1985)
Text on basic well log analysis for geologists.

Company that used to be in business of providing well logging services.
1973  guide on geophysical well log interpretation including SP, resistivity,
gamma, gamma-gamma, neutron, fluid conductivity,  temperature, and 3-D
velocity. Hamilton and Myung (1979) provide summary information on
major geophysical logging techniques.

Text of log analysis for interpretation of subsurface  geology with emphasis
on computer models.

Various publications by a company that used to be in the business of
providing  logging services:  Log review (1974) covers induction, resistivity,
acoustic velocity, gamma-gamma, neutron-gamma, diplog, neutron
lifetime. Log interpretation fundamentals (1975) and charts (1979). Also,
a home study course on well logging and interpretation  (1982).

Text on well logging resistivity,  SP, induction, gamma, neutron, acoustic.

2-volume collection of reprints of papers on formation evaluation: I (log
evaluation), II (log interpretation). Oriented toward petroleum
applications.

Text on well logging for physical properties.

Text covering SP, resistivity, acoustic, and radioactivity logging and
interpretation.

Text on log interpretation oriented toward geologists and engineers:
resistivity, SP, induction, acoustic, gamma, density, neutron, combined
porosity, and focused resistivity logs.

Text on advanced well log interpretation.

Text covering density, gravimetric, acoustic, seismic,  and dipmeter logs.

Edited volume with several chapters devoted  to geophysical logging
methods.

Text on formation evaluation.

Text covering use of downhole methods for characterization of fractured
rock.
                                                 7-11

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                                           Table 7-3 (cont.)
Reference
Description
Pirson (1963, 1983)
Rider (1986)
Schlumberger (1989a&b,
(1991)
Scott and Tibbets (1974)
Serra (1984a,b)
SPWLA (1978a, 1978b, 1990)
Tearpocke and Bischke
(1991)

Tittman(1986)

Wyllie (1963)
 1963 handbook on well log analysis and 1983 text on geologic well log
interpretation.

Text on geological interpretation of logs: caliper, temperature, SP,
resistivity, induction, gamma, spectral gamma,  sonic/acoustic velocity,
density.

Latest edition of Schlumberger Educational Services publications on log
interpretation principles and applications covering uncased holes  (1989a),
and cased holes (1989b), and log interpretation charts (1991). See
citations for methods covered. Earlier publications  include Schlumberger
(1972 and 1974).

Bureau of Mines information circular reviewing well log techniques for
mineral deposit  evaluation.

Volume  1: acquisition of well log data; Volume 2: log interpretation. See
citation for methods covered.

Series of reprint volumes containing  papers on acoustic  logging (1978a),
gamma, neutron and density logging (1978b),  and borehole imaging
(1990).

Text on subsurface geological  mapping using a variety of sources of
information, including  geophysical data.

Well logging text covering electrical, nuclear,  and sonic methods.

Text on fundamentals  of well log interpretation. See citation for methods
covered.
                                                 7-12

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        Table  7-4  provides information  of texts/reports  focusing  on  hydrogeologic/contaminated
site  applications,  ground-water texts with  chapters on borehole geophysical  methods, and  major
conference  series  and symposia  concerning  borehole geophysical methods.
 7.2 Special  Considerations

        7.2.1 Borehole versus In Situ Methods

        In Situ sensing or logging methods involve the placement  of disposable  sensors (see,  e.g.,
 Greenhouse  et al.,  1985);  reusable sensors (e.g., samplers  and sensors used with cone
 penetrometers  or  other movable probes);  or permanent sensors,  which are installed in boreholes
 with cables  running to the surface and backfilled.  In situ  sensors  are  most commonly  used for
 chemical  field screening and  ongoing chemical  monitoring of the vadose  zone,  while downhole
 logging methods  are  more commonly  used for  aquifer and lithologic characterization.  This
 reference  guide focuses  on methods  involving  physical characterization of the subsurface  using
borehole  instruments.  U.S.  EPA (1993) provides  additional information on the  use  of cone
penetrometers  for physical characterization (Section 2.2), and  the use  of  in situ and borehole
 chemical  sensors  (see  Table 7-1, for  sections in U.S.  EPA 1993, dealing with specific  types of
 sensors).

        7.2.2 Surface-Borehole/Source-Receiver  Configurations

        Downhole and surface methods have become increasingly  hybridized  in  recent years. For
 example,  any method  using a source-receiver layout (e.g.,  electrical resistivity, seismic  and
microwave radar) can be  used in various combinations:  surface-to-vertical  borehole, surface-to-
multiple boreholes, borehole-to-borehole.  Recent  developments  in horizontal drilling
technologies  for  subsurface monitoring and ground-water  remediation  also have  made  the  use of
surface-to-horizontal  borehole  configurations possible  (Dickinson  et al.,  1987).

        In  surface-to-borehole  configurations the  signal source  is  usually at the surface with
receivers  in  the borehole,  as  with vertical  seismic  profiling and geophysical diffraction
                                                7-13

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Table 7-4 Borehole Geophysics Texts, Reports, and Symposia Focusing on Hydrogeologic and
Contaminated Site Applications
Topic/Reference
Description
Hvdrogeologic/Contaminated  Site  Abdications
U.S. Geological Survey
Publications
U.S. EPA Publications
Emerson and Webster (1970)


Respold (1989)


Taylor and Dey (1985)
Texts:  Keys (1990) and Keys and MacCary (1971) are
complementary texts on hydrogeologic applications of borehole
geophysics;  Reports: Bennett and Patten (1960) cover borehole
geophysical methods for estimating specific capacity of mutltiaqurfer
wells. Johnson (1968) summarizes application of logging methods for
hydrogeologic studies. Jorgenson (1989) discusses use of logs to estimate
porosity, water resistivity, and intrinsic permeability. Patten and Bennett
(1963) review application of electrical and nuclear logging to ground-
water hydrology. See also Keys (1990).

Section 8.4.3 of the compendium of Superfund field operations methods
(U.S. EPA, 1987) and Section 3 of U.S.  EPA (1993) cover borehole
geophysics. Taylor et al. (1990) and Wheatcraft et al. (1986) review use
of selected borehole  geophysical methods at contaminated sites. Nielsen
and Aller (1984) cover borehole methods for well integrity testing.

Report prepared for Australian Water Resources Council on
interpretation of geophysical logs in unconsolidated sediments.

Text on well  logging in ground-water development published by
International Association of Hydrogeologists.

Bibliography on borehole geophysics as applied to ground-water
hydrology. Organized in 70 subject headings.
Ground-Water Texts  Covering Borehole Geophysics
Bureau of Reclamation
(1981)

Brown et al. (1983)
Campbell and Lehr (1973)
Davis and DeWiest
(1966)
Chapter  8 covers borehole logging and survey techniques for ground-
water  investigations.

UNESCO research guide for ground-water studies. Section 9 covers
borehole  geophysics.

Text on water well technology. Chapter 9 covers borehole geophysics
including SP, resistivity, gamma, caliper, fluid velocity, and acoustic.
Extensive annotated bibliography.

Hydrogeology text.  Chapter 8 covers borehole
methods including SP, resistivity, acoustic, gamma, and neutron.
                                              7-14

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                                         Table 7-4 (cont.)
Topic/Reference
                              Description
Ground-Water Texts  Covering Borehole Geophysics (cont.)
Driscoll (1986)
Everett  (1985)
Redwine et al. (1985)
Rehmetal. (1985)
Conferences/Symposia

Canadian Well Logging Society
(Various Dates)*
Killeen (1985)
MGLS Symposia Series
(1985-1991)
NWWA (1984, 1985, 1986)*
SPWLA (1960-present)*
                              Text on ground water and wells. Chapter 8 covers borehole geophysical
                              methods: resistivity, SP, gamma, gamma-gamma, neutron, acoustic,
                              temperature, caliper, and fluid velocity.

                              Handbook focusing on coal and oil shale. Section 8 covers borehole
                              geophysical  methods: temperature, caliper, gamma,  flow, radioactive
                              tracer, 3-D velocity (acoustic  waveform),  acoustic, gamma-gamma,
                              electric, acoustic televiewer.

                              EPRI ground-water manual. Section 5 covers borehole geophysical
                              methods  including SP, resistivity, gamma-gamma, neutron,  caliper,
                              borehole seismic methods, and temperature.

                              Section 5 covers hydrogeologic applications of surface and borehole
                              geophysics and the bibliography in Section 6 contains 64 references on
                              borehole logging.
                              Biannual formation evaluation symposium series.  Published volumes
                              include 2nd (1968), 6th (1977), 7th (1979), 8th (1981), 9th (1983), llth
                              (1987), 12th (1989), and 13th (1991).

                              Proceedings of the 1983 international symposium on borehole geophysics
                              for mining and geotechnical applications. Contains 40 papers.

                              Minerals and Geotechnical  Logging Society biannual international
                              symposia on borehole geophysics for minerals, geotechnical, and ground-
                              water applications. Proceedings of 2nd symposium contains 7 papers on
                              ground-water applications.  MGLS  is a chapter of SPWLA.

                              Conferences on surface and borehole geophysical methods in ground-
                              water investigations. Both the 1984 and 1985  conference proceedings
                              include 11  papers on borehole methods, and the 1986 conference
                              proceedings includes 7 papers.

                              Annual Logging Symposium transactions of the Society of Professional
                              Well Log Analysts. 33rd annual symposium was held in 1992.
* See Appendix B.2 for addresses.
                                                7-15

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 tomography, but the source also  can be placed in the borehole  with sensors  at the surface, as
 with  uphole  seismic  measurement.   The type of model used for interpretation of the data will
 usually dictate  the configuration  required.  In  borehole-to-borehole  configurations,  the  source is
 placed  in  one borehole and  receivers are  placed  in one or  more boreholes.  When more than two
 boreholes  are used, some  methods  (e.g., cross-hole  seismic  shear) require  that the boreholes be
 aligned. Other  cross-hole  methods  may not  require  alignment.

        7.2.3 Tomographic Imaging

        The  application  of tomographic  imaging techniques,  originally developed  in the  field  of
 medicine,  represents an  important  recent development  in  borehole  geophysics (see  general
 references  identified in  Table 7-9).  Tomographic  imaging  is a  type  of waveform attenuation
 analysis that  allows high-resolution  imaging of subsurface inhomogeneities,  such  as  stratigraphy,
 fracture  detection,  moisture variations,  and buried  objects.  X-rays have  been most commonly
 used  for tomographic  imaging and numerous  terms have been  used.  CAT, which can stand for
 computerized  axial  tomography or  computer-assisted tomography,  scan is probably the most
 commonly  used  term;  others  include  x-ray  computed (computer) tomography, computed
 tomographic  (CT)  scanning, x-ray CT,  gamma-ray  attenuation CAT.  Use of  CAT  scanning for
 near-surface  characterization  is in  experimental  stages.

        The terms geophysical diffraction  tomography (GDT)  and  variable  density acoustic
 tomography have been  applied to  seismic tomographic imaging methods. GDT differs from
 other seismic  methods in the way seismic signals  are used and how the data  received by  the
 geophones  or hydrophores  are  processed.  Table 7-12  identifies a  number  of recent  references
 on  seismic tomographic  methods.   Tomographic  principles can  also be  applied  to cross-hole
 electrical resistivity and radar measurements,  but  this  has  been done infrequently (Table 7-10).
7.3 Major  Types of Logging Methods

       This  section provides  brief descriptions of the three  major types of geophysical logging
methods: electrical,  nuclear, and  acoustic/seismic. Summary  tables  in  these  sections provide  a
                                                7-16

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short description  of each  method  and list  hydrogeologic applications. At  the  end  of this section,
miscellaneous  logging methods  are  covered.

        7.3.1  Electrical  and Electromagnetic Logging  Methods

        Electrical  logging measures the flow of electric  current in and  adjacent to  a  well, using
the  same  principles as  various  surface  methods: electromagnetic induction  (see  Section  4.1);
magnetotellurics  (see Section 4.5), and  microwave  sensing (see Section 6.1).  Table  7-5  describes
11  types of electrical  and 4 types of electromagnetic  logs  and their  potential  for hydrogeologic
applications, and  Table  7-10  provides an index  of references  using these  methods.

        Fluid  conductivity  measurements are used to measure variations in  salinity and  locate
saltwater leaks  in artesian wells.  Spontaneous potential logs,  one of the  most commonly used
electrical logs, simply records  the  changes  in current flow  that result from changes in lithology.
Single-point resistance and normal,  focused and  lateral resistivity logs  all measure resistivity
using the  same  principles as  surface  resistivity  measurements. Resistivity logging  methods  have
numerous  variants  depending  on  electrode  configurations  and spacings.  These  logs  require
conductive  drilling  mud  or ground water with high  salinities  to work well and,  consequently, are
not  well suited  for near-surface investigations in freshwater  aquifers.  Normal  resistivity logs,
however, are  widely used  to  measure  variations  in water quality.

        Induction  logs operate on  the same principles  as  surface  EM  methods that  measure
conductivity (see  Section 4.1).  Since direct  contact  with a conductive  medium is  not required,
induction logs are especially useful  for  logging the  dry portion  of boreholes where the  water table
is far below the  surface (see,  e.g., Turner and Black,  1989).  Also, induction logs are also
unaffected by the presence of  plastic (e.g.,  polyvinyl choride)  well  casings, making them
particularly useful for  locating  electrically conductive  contaminant plumes  in existing wells.

        Nuclear magnetic resonance  is often classified  as a nuclear method,  but  it  is actually a
magnetic method  that  uses the  same  principle as  the proton  precession  magnetometer (Section
6.2), except that  the precession  of protons  (hydrogen  atoms)  in water  molecules  is measured in
the formation  after  an  induced  magnetic field  has  been turned off.  Nuclear  magnetic  resonance
                                                  7-17

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Table 7-5 Summary of Electrical and EM Borehole Logging Methods in Hydrogeologic Studies
Method
Description
Hydrogeologic Applications
Electric Logs

Fluid conductivity
Spontaneous
Potential (SP, self-
potential)
Single-Point
Resistance
Normal Resistivity
(short normal, long
normal)
Focused Resistivity
(guard log,
laterolog, dual
laterolog)

Lateral  Resistivity
Microresistivity
(microlog,  contact
log,  microsurvey,
microlateral,
micronormal)
A probe that records only the
electrical conductivity of the
borehole fluids by placing electrodes
inside a protective housing.
Records the potentials or voltages
that develop at the contacts between
different  lithologies.
Measures the resistance in ohms
between an electrode in a well and
an electrode at the land surface, or
between two electrodes in a well.
Resistance is measured using four
electrodes at various spacings on a
single probe that is lowered down
the hole.
Uses guard electrodes above and
below the current electrode to force
the current to flow out into the
rocks surrounding the borehole.

Similar to normal-resistivity
electrode, but electrodes are more
widely spaced on the probe.
Numerous variations; all have short
electrode spacing and pads or some
kind of contact electrode to decrease
the effect of borehole fluid.
Provides data related to the salinity
(concentration of dissolved solids in the
borehole fluid); used to locate sources of
saltwater leaking into artesian wells; aids
in interpretation of electric logs.

Widely used in the petroleum industry
for determining lithology, bed thickness,
and salinity of formation water; generally
not applicable for freshwater aquifers.

Excellent for information about changes
in lithology;  not influenced by bed
thickness effects; cannot be used for
quantitative interpretation of porosity
and salinity.

Widely used in  ground-water hydrology,
primarily to determine water quality;
quantitative  interpretations  require
corrections for bed thickness, borehole
diameter, and other factors.

Designed to measure the resistivity of
thin beds or resistive rocks in  wells
containing conductive fluids; not
generally available to water well loggers.

Designed to measure resistivity of rock
farther out from the borehole; suitable
only for thick beds (> 40 feet); marginal
for highly resistive rocks.

Designed mainly to determine the
presence or absence of mudcake; used
primarily by  the petroleum industry to
determine the resistivity of the 3- to 5-
inch zone affected by drilling muds.
                                                  7-18

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Method
Description
Hydrogeologic  Applications
Dipmeter
Induced
Polarization (IP)
Hole-Hole/Hole-
Surface Resistivity


Cross-Well AC
Voltage
Electromagnetic  Logs

Induction (dual
induction, slimhole
EM probe, borehole
conductivity
meter)*

Microwave sensing
Nuclear Magnetic
Resonance
Surface -Borehole
CSAMT
Includes a variety of wall-contact
microresistivity probes;  electrodes
are on pads located 90 or 120
degrees apart and oriented with
respect to magnetic north by a
magnetometer in the probe.
Probe measures response of
formation to an injected current (see
Section 3.5). Requires water-filled
hole.

Numerous configurations of source
and receiver  electrodes are possible.
A low frequency alternating current
is introduced into  the fracture
system of 2 wells and the voltage
between the currents and
observation wells is measured.
Probe contains two coils: one for
transmitting an alternating current
into the surrounding rock, and a
second for receiving the return
signal; measures conductivity.

A variety of methods use
microwaves for sensing the
subsurface single and cross-borehole
radar (similar to GPR); dielectric
log using continuous pulse
microwave.

Similar to proton precession
magnetometer, except response of
protons in subsurface water is
measured.

Similar to surface CSAMT (Section
4.5), except that borehole  sensors
are used.
Probably the best instrument for
gathering information on the location
and orientation of primary sedimentary
structures over a wide variety of hole
conditions; provides data on the strike
and dip of bedding planes also on
fractures (less precise).

Used to measure clay content and pore
fluid chemistry and reactivity.
Allows  three-dimensional  modeling of
resistivity data to characterize subsurface
inhomogeneities.

Used to characterize the spatial variation
in subsurface  fracture systems (Robbins
and Hay den, 1988)
Designed for use in boreholes with no
conductive material between the probe
and the formation (oil-based drilling
muds and air); generally not suitable for
wells containing fresh water.*

Pulsed microwave systems similar to
applications for GPR (see Section 6.1);
dielectric log has been used to measure
the thickness of hydrocarbons floating on
ground water (Holbrook, 1988).
Measurement of porosity, moisture
content, pore-size  distribution, available
water. Near-surface applications most
common (see Section 7.3.1).

Potential for mapping of subsurface
conductive zones and three-dimensional
characterization of fracture zones in
deep  boreholes.
* The recently developed EM39 induction logging tool is suitable for use  in freshwater wells (McNeill et
al, 1990).

Source Adapted from Keys (1990), Rehm et al. (1985), and Wheatcraft et al. (1986).
                                                    7-19

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is more commonly used to measure soil  moisture content in the near surface than for
hydrogeologic  investigations  because a  large diameter  (minimum  of 7 inches) is required  for
borehole  logging.

        7.3.2 Nuclear  Logging  Methods

        Nuclear logging  includes  all methods that either  detect the presence  of unstable  isotopes
or create such isotopes in  the  vicinity  of a borehole. Table 7-6 describes  six  types of  nuclear logs,
and  Table 7-11 provides  an index  of  references using these methods.  Each  type is  potentially
useful in hydrogeologic  studies of  the  vadose and/or  saturated zones because none  require
conductive media,  as do most electrical logging methods.  Most  of these  nuclear logs  also allow
quantitative  interpretation  of  bulk  density,  porosity, salinity, and unsaturated moisture content.
All of them are widely used  in the petroleum industry, and  neutron logs  have been  widely used
in the study of soils.  Gamma and  neutron logs are probably  the  most common nuclear methods
used  in  ground-water  studies. Gamma spectrometry, gamma-gamma,  and neutron activation
have  been used less frequently and should probably be  considered more  often. Nuclear logging
tools  with active  radioactive  sources require  careful adherence to procedures  for  protecting the
health and safety  of users; their use is prohibited  or restricted in  some states.

        7.3.3 Acoustic  and Seismic  Logging Methods

        Table 7-7  provides information on  three types of  acoustic logs and various types of
borehole seismic methods.  Acoustic logging tools  incorporate  the  signal  source and the  receiver
on the  same probe and  are used  in single  boreholes.  They  are especially valuable for
characterizing secondary  porosity  and  fractures.  Borehole  seismic  methods  can  use  various
surface-borehole or  borehole-borehole  source and geophone/hydrophone  configurations.   They
are  used  primarily  for stratigraphic, fracture,  and  geotechnical  characterization.  Table 7-12
provides an  index  of references related to acoustic and seismic  methods.
                                              7-20

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Table 7-6 Summary of Nuclear Borehole Logging Methods in Hydrogeologic Studies*
Method
Description
Hydrogeologic  Applications
Gamma (natural
gamma)
Neutron
Gamma-Gamma
(density)
Gamma
Spectrometry
(spectra(l)-,
spectro-,
spectronomic-
gamma)
Neutron Activation
(activation, thermal
neutron)
Neutron Lifetime
(pulsed-neutron
decay)
Records total natural gamma
radiation (primarily from K-40, U-
238, and Th-232) from a borehole
that is within a selected energy
range.

Probe contains a source of neutrons
and detectors that record neutron
interactions in the vicinity of the
borehole.

Records the radiation at a detector
from  a gamma source in the probe
after it is attenuated and scattered in
the borehole  and surrounding rock.
Records the amount and energy
level of gamma photons either on a
continuous basis or at selected
depths with a stationary probe.
Types and amounts of radioisotopes
can be measured.
Uses neutrons to "activate" stable
isotopes in the borehole and identify
the activated element by measuring
the amount and energy level of
emissions (see gamma spectrometry
above).

Uses a pulsed-neutron generator and
a synchronously gated neutron
detector to measure the rate of
decrease of neutron population.
The most commonly used nuclear log in
ground-water applications; used for
identification of lithology (clay and shale
particularly) and stratigraphic
correlation.

Widely used to measure saturated
porosity and moisture content in the
unsaturated zone; can also be used for
lithology  and  stratigraphic correlation.

Primarily  used to determine bulk density,
porosity, and moisture content;
distinguishes lithologic units; extensively
used in the petroleum industry less
frequently used for ground-water
applications.

Allows more precise identification of
lithology than gamma log; permits
identification of artificial radioisotopes
that might be contaminating water
supplies; widely used by petroleum
industry should probably be used more
frequently in ground-water
investigations.

Permits remote identification of
elements present in the ground water
and adjacent rocks; relatively  new
technique with potential for wide
application in ground-water hydrology.
Used to measure salinity and porosity;
can provide useful data through casing
and cement; used by petroleum industry
to date applications in ground water
have been limited.
* Computerized axial tomography using x-rays and gamma rays has been tested in the laboratory, but not
adapted for use in boreholes-see Section 7.2.3.

Source: Adapted from Keys (1990).
                                                 7-21

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Table 7-7 Summary of Acoustic and Seismic Borehole Logging Methods in Hydrogeologic Studies
Method
 Description
Hydrogeologic Applications
Acoustic Velocity
(sonic,  transmit
time)
Acoustic Waveform
(variable density,
three-dimensional
velocity, full
waveform sonic)
Acoustic Televiewer
(seisviewer)
Surface -Borehole
Seismic (vertical
seismic profiling/
VSP, uphole/
downhole)

Cross-Hole Seismic
(cross-hole shear;
cross-hole VSP)

Geophysical
Diffraction
Tomography
 Records the travel time of an
 acoustic wave from one or more
 transmitters to receivers in the
 probe.
 Received acoustic signals are
 recorded digitally, or
 photographically using oscilloscope
 displays; the wave forms are
 analyzed (e.g., amplitude changes,
 velocity ratios).

 An ATV probe uses a rotating
transducer that serves as both
 transmitter and receiver of high
 frequency acoustic pulses. An
 oscilloscope  and light-sensitive paper
 are used to create a 360 degree scan
 of the borehole wall.

 Various configurations of  surface
 and borehole geophone and seismic
 source  arrays  are  possible.
Various configurations in which both
seismic source and geophones  are
placed in boreholes.

Tomographic  imaging principles
applied to seismic data. Three
configurations are possible for the
seismic source:  borehole-borehole,
surface-borehole, and surface-to
boreholes.
Useful for providing information on
lithology and porosity, limited to
consolidated materials in fluid-filled
boreholes beginning to be more widely
used in ground-water studies.

Provides information on lithology and
structure, various elastic properties can
be determined; vertical  compressibility  of
an aquifer can be estimated; fractures
can be characterized. Not yet widely
used in hydrogeologic studies.

Provides high-resolution information  on
the location and character of secondary
porosity, such as fractures and solution
openings; can also provide the strike  and
dip of fractures and bedding planes; not
yet used extensively in ground-water
studies because of cost and complexity.

VSP: detection of lithologic  boundaries,
fracture detection, estimation of
permeability  and hydraulic conductivity
Uphole/Downhole: characterization   of
geotechnical  properties.

Stratigraphy, porosity, fracture
characterization,  cavity detection,
measurement of soil dynamic properties.

High-resolution possible;  can detect
isolated inclusions,  lithologic boundaries,
homogeneous areas.
                                                  7-22

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 7.4 Miscellaneous Logging Methods

        7.4.1 Lithologic and Hydrogeologic Characterization Logs

        Table 7-8 describes seven types of logs that may be useful for characterizing lithology and
 hydrogeology. Caliper logs have numerous variants but all are intended to measure borehole
 diameter. They provide essential data for interpreting other types  of logs that are affected by
 variations in borehole diameter,  and also generate some data on lithology and secondary
 porosity. Fluid temperature can be measured as  a gradient (also called thermal resistivity), or
 changes measured over time at one or more points can be tracked (as when injected water of a
 different temperature is used as  a tracer). Chapter 6 (Section 6.4.2) contains further discussion
 of borehole temperature logging and Table 6-4 lists over  20 references on use of temperature
 logging.

        Fluid flow measurements  can locate zones of high permeability (fractures and solution
 porosity) and areas of leakage in artesian wells. The development of thermal and
 electromagnetic borehole flowmeters that can sense water movement either vertically or
 horizontally (or both) at very low velocities has greatly enhanced the ability to characterize
variations in hydraulic conductivity in boreholes (see Table 7-13). Borehole  television cameras
 have the advantage of allowing visual inspection of a borehole for such things as fracture
 detection and monitoring well integrity. Morahan and Dorrier (1984) describe the uses of
television borehole logging in ground-water monitoring programs.

       Borehole magnetometers operate  on the  same principles as  surface  magnetometers
 (Section  6.2).  Magnetometer  probes  can  be especially useful when drilling  is required in  areas
where the presence  of buried ferrous metal wastes is suspected.  In such situations,  lowering  the
probe to the bottom of the hole  approximately every 5  feet may provide advanced warning  of the
presence of buried  drums that are outside the detection limit  of surface instruments.

       Borehole gravity  is probably the least  commonly  used borehole method in  contaminated
site and hydrogeologic applications,  and  its use has been  reported  only infrequently  (Table  7-13).
                                            7-23

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Table 7-8 Summary of Miscellaneous Borehole Logging Methods in Hydrogeologic Studies*
Method
Description
Hydrogeologic Applications
Caliper
Fluid Temperature
Flowmeters
(mechanical/spinner
log, thermal,
electromagnetic)
Single-Borehole
Tracing
Television/
Photography
Magnetic
Gravity
A probe that measures borehole
diameter; many types are available
mechanical, electrical, acoustic, one
to four arms.
Temperature probes are used to
record temperature or the rate of
change in temperature vs. depth (see
Section 6.4.2)

Flow measurement with logging
probes most commonly is done
mechanically with an impeller
flowmeter; thermal and EM
flowmeters are relatively  recent
developments  that allow  more
precise readings.

Various methods (injector-detector,
injection-withdrawal,  borehole
dilution) measure direction and
speed of water movement using
tracers.

Borehole television and cameras
allow visual inspection of borehole
both sidewards and downwards.
Probes operating on same principles
as surface magnetometers.
Microgravity instrumentation
designed for borehole use.
Provides some information on lithology
and secondary porosity; essential to
guide the interpretation of other types of
logs that are affected by borehole
diameter.

Widely used in ground-water studies for
information on movement of natural or
injected water, permeability; distribution,
and relative hydraulic head.

Used to measure vertical flow in
boreholes, locate intervals of leakage in
artesian wells,  identify fractures
producing and accepting water, locate
zones of high permeability; one  of the
most useful logging methods available
for the study of ground water.

Similar to flowmeters (above).
Information on frequency, size, and
orientation of fractures; vertical
correlation of rock cores where voids are
present; inspection of monitoring well
integrity.

Changes in lithology; check for buried
ferrous metal containers in boreholes
before the next depth increment is
drilled.

Complements surface gravity data for
structural and stratigraphic
interpretation.
* See Section 7.4.2 for discussion of well construction logging methods.

Sources: Adapted from Keys (1990) and Wheatcraft et al. (1986).
                                               7-24

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       7.4.2 Well  Construction Logs

       Well construction logging is useful for planning cementing operations, installing of casing
and screens, performing hydraulic testing, and guiding the interpretation of other logs (Keys,
1990; Nielsen and Aller, 1984). The major types of well construction logs are casing logs, for
locating cased intervals in wells; cement and gravel pack logs, for locating  cement and gravel
pack in the annular space outside a casing; and borehole deviation logs, for determining whether
a well deviates from the vertical.

       A number of specific borehole logging methods can be used for well construction logging
(see Table 7-2).  Most electric logs and gamma-gamma logs will  show a sharp deflection at the
bottom of steel casing. High-resolution caliper logs are excellent for locating threaded couplings,
the bottom of the inside string of casing,  and, sometimes, corroded steel casing.

       A caliper log made before the casing is installed is helpful for planning the cementing or
installation of gravel pack. Temperature logs can locate cement grout while it is still warm from
chemical reactions during curing. A special type of acoustic log called a cement bond log can be
used to determine the location of cement behind the casing and,  under some  conditions, the
quality of the bonding to easing and rock.

       The deviation of boreholes and wells from  the vertical is  common.  While this tendency is
not commonly measured by water well loggers, it may be important for ensuring the proper
functioning of logging probes and accurate interpretation of log  data. Augered boreholes less
than 100 feet deep reportedly have deviated such that transmittance logs between boreholes have
been adversely affected (Keys 1990).  Single-shot probes that provide one measurement of the
deviation angle and azimuth at a  predetermined depth are the least  expensive method for
obtaining borehole-deviation information.  The disadvantage is that the probe must be brought to
the land surface and reset after each measurement.
                                           7-25

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Table 7-9 Index for General References on Borehole Geophysics
Topic
References
Bibliographies


Glossary

    s/R

General
Log Interpretation
Imaging/Tomography
Quality Control

Borehole Logging
Symposia
Ground-Water Applications

Texts/Reports
Ground-Water Texts
with Sections on
Borehole Geophysics
Prenksy (various dates), Rehm et al. (1985), Taylor and Dey (1985),
University of Tulsa (1985), van der Leeden (1991)

Society of Professional Well Log Analysts (1985)
Dresser Atlas (1974,  1982), Ellis (1987), Guyed and Shane (1969),
Hamilton and Myung (1979), Hallenberg (1983), Hearst and Nelson
(1985), Helander (1983), Kelly  (1969), LeRoy et al. (1987), Labo (1987),
Lynch (1962), Nelson (1985), Scott and Tibbets (1974), Serra  (1984a),
Telford et al. (1990), Tittman (1986)

Asquith and Gibson (1982), Birdwell Division (1973),  Dresser Atlas
(1975, 1979, 1982), Doveton (1986), Foster and Beaumont (1990),
Hallenberg (1984), Hilchie (1982a,b), Pirson (1963, 1983), Rider (1986),
Schlumberger (1972,  1974, 1989a,b, 1991), Serra (1984b), SPWLA (1979),
Tearpock and Bischke (1991), Wyllie (1963)

Borehole Imaging: Lines and Scale (1997), SPWLA (1990-borehole
imaging); Tomography: Davis (1989), Desaubies et al.  (1990),  Stewart
(1991), Lines and Scales (1987), Tweeton (1988)

Bateman (1985), Theys  (1991)

Canadian Well Logging Society (various dates), Killeen (1985), Minerals
and Geotechnical Logging Society (1985-89), NWWA (1984, 1985, 1986),
SPWLA (1960 to present), Thomas and Dixon (1989)
Bennett and Patten (1960), Emerson and Webster (1970), Hodges and
Teasdale (1991), Johnson (1968), Jorgenson (1989), Keys (1990), Keys
and MacCary (1971), Patten and Bennett (1963), Respold (1989), Taylor
and Dey (1985), Technos (1992)

Beesley (1986), Bureau of Reclamation (1981), Brown et al. (1983),
Campbell and Lehr (1973), Davis and DeWiest (1966), Driscoll (1986),
Everett (1985), Kovacs et al. (1982), Redwine et al. (1985), Rehm et al.
(1985), U.S. Army Corps of Engineers (1979)
                                                 7-26

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                                          Table 7-9 (cont.)
Topic                          References
Ground-Water Abdications  (cont.)

Contaminated Site Texts         Taylor et al. (1990), Technos (1992), U. S. EPA (1987, 1993), Wheatcraft
                               et al. (1986)

Review Papers                  Benson (1991), Collier and Alger (1988), Crowder and Irons (1989—
                               economic considerations), Darr et al. (1990), Dickinson et al.  (1987),
                               Evans (1970), Johnson (1968), Jones and Buford (1951), Jones and
                               Skibitzke (1956), Keys (1967a,b, 1968), Linck (1963), Mickam et al.
                               (1984), Nelson (1982), Paillet (1989a), Pfannkuch (1966), Picket! (1970),
                               Segesman (1980), Stegner and Becker (1988), Stowell (1989a,b),  Taylor
                               (1989), Taylor et al. (1985)
                                                  7-27

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Table 7-10 Index for References on Electric  and EM Borehole Logging Methods
Topic
References
Texts
ER/EM Tomography

Electrical

Electric Logs
Self-Potential
Fluid Conductivity
Dipmeter
Dakhnov (1962), Guyed (1952, 1957a, 1958,  1965), Guyed and Pranglin
(1959),  Hilchie (1979), Kaufman and Keller (1989—induction), Patten
and Bennett (1963), Ross and Ward (1984); Bibliography Johnson and
Gnaedinger (1964)

Daily and Owen (1991), Dines and Lytle (1979, 1981), Sandberg et al.
(1991);  see also Table 7-9
Baffa (1948), Barnes and Livingston (1947), Collier (1989a—resistivity log
selection), Croft (1971), Greenhouse et al. (1985),  Guyed (1957b,  1965,
1966), Guyod and Pranglin (1959), Hanson (1967), Ineson and Gray
(1963), Jones and Buford (1951), Kwader (1985), Lindsey (1985),  Lytle et
al. (1979), MacCary (1971), Michalski (1989), Patton and Bennet (1963),
Peterson and Lao (1970), Poland and Morrison (1940), Pry or (1956), Roy
(1975), Turcan (1962, 1966), Turcan and Winslow (1970), Walstrom
(1952); Focused Resistivity: Moran and Chemali (1985), Roy (1982);
Interpretation: Alger (1966-fresh water), Atkins (1961), Carter (1966)

Frimpter (1969), Gonduin and Scale (1958), Kendall (1965), Morris
(1957), Vonhof (1966)

Emilsson and Arnott (1991), Michalski et al. (1992), Pedlar et al. (1990,
1992), Sutcliffe and Joyner (1966), Tellam (1992), Tsang and Hufschmied
(1988), Tsang et al.  (1992), Williams and Conger (1990)

Bigelow (1985)
Borehole-Surface  Resistivity/IP  Asch and Morrison (1989), Asch et al. (1986-contaminated site), Bevc
                              and Morrison (1991), Daniels (1977, 1983), Le Masne and Poirmeur
                              (1988), Olhoeft and Scott (1980-complex resistivity), Poirmeur and
                              Vasseur (1988), Wilt and Tsang (1985a,b)
Cross-Well  Resistivity

Electromagnetic

Review

EM (Induction) Logs
Daily and Owen (1991—tomography), Robbins and Hayden (1988)
Dyck (1991)

Snelgrove and McNeill (1985), McNeill (1986, 1989), McNeill and Bosnar
(1988), McNeill et al. (1990), Peterson (1991), Taylor and Wheatcraft
(1986), Taylor et al. (1988, 1989), Wyllie  (1960)
                                                 7-28

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                                         Table  7-10  (Cont)
Topic
References
Electromagnetic (cent.)

Cross-Borehole Radar



Nuclear Magnetic Resonance


Other EM Methods
Davis et al. (1984), Dines and Lytle (1979, 1981), Holser et al. (1972),
Leckenby  (1982), Lytle et al. (1979, 1981), Olhoeft (1988), Olhoeft et al.
(1992), Sandberg (1991), Wright et al. (1984)

Abragam (1961), Jackson (1984), Keys (1990), Morrison (1983),
Schlichter  (1963)

Borehole CSAMT. West and Ward (1988); Dielectric Collier (1989b),
Freedman  and Vogiatzis (1979), Keech (1988), Serra (1984a); Disposable
E Los: Greenhouse et al. (1985)
                                               7-29

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Table 7-11 Index for References on Nuclear Logging Methods
Topic
References
Review Papers



Specific Logging Methods

Gamma



Gamma-Gamma  (Density)



Gamma Spectrometry




Neutron
Neutron Lifetime

Radioactive  Tracers
Belcher et al. (1952), Gardner and Roberts (1967), Guyod (1965), IAEA
(1968, 1971), Killeen (1982—gamma), Morrison (1983), Patten and
Bennett (1963), SPWLA (1978a); Protection:  Blizard (1958), U.S. Nuclear
Regulatory  Commission (1985)

Baffa (1948), Duval (1980, 1989), Ellis (1990), Keys (1967a), Russell
(1941);  Bibliography: Johnson and Gnaedinger  (1964);  Protection:
Fujimoto et al. (1985)
Guyed (1965, 1966), Ellis (1990), Killeen (1982), Killow (1966), Lee et al.
(1984), Norris (1972), Markstrom (1992), Mickam et al. (1984), Rabe
(1956), Reed (1985), Wahl (1983), Woodyard (1984)

Ellis (1990), Newton et al. (1954), Pickell and Heacock (1960), Poeter
(1987, 1988-neutron, gamma-gamma), Scott (1977), Tittman and Wahl
(1965), Yearsley et al.  (1990a, 1991)

Text. Adams and Gasparini (1970); Other: Ellis (1990), Quirein et al.
(1982), Rutkowski  and Taylor (1990), Schneider (1982), Serra et al.
(1980), Stromswold and Wilson (1981), Taylor (1986), Thomas and Dixon
(1989)

Bleakley et al. (1965), Jones and Schneider  (1969), MacCary  (1971),
Meyer (1962), Poeter  (1987, 1988), Reed et al. (1983-vadose zone),
Senger (1985), Schimschal (1981), Teasdale and Johnson (1970), Tittman
et al. (1968), Tittle (1961). U.S. EPA (1993) provides an index of over 90
references on neutron logging for moisture measurement.

Thornhill and Benefield (1990, 1992)

Moltyaner (1989), Wiebenga et al.  (1967)
                                               7-30

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Table 7-12 Index for References on Acoustic and Seismic Logging Methods
Topic
References
Acoustic Logs

General

Acoustic Velocity/
Waveform


Acoustic Televiewer
Water Levels

Borehole Seismic Methods

Seismic Profiling (VSP)
Cross-Hole Seismic
Diffraction  Tomography
Guyed and Shane (1969), SPWLA (1978b),

Haase and King (1986), Paillet and White (1982), Paillet et al. (1986),
Picket! (1960), Thornhill and Renefield (1990), Yearsley et al. (1990b,
1991)

Collier and Ridder (1992), Haase and King (1986), Kierstein (1984),
Pailett et al. (1985), Schaar (1992), Thomas and Dixon  (1989),
Westphalen (1991), Williams and Conger (1990), Zemanak et al. (1969,
1970)

Alderman (1986), Ritchey (1986)
Texts: Balch and Lee (1984), Gal'perin (1979), Hardage (1985), Toksoz
and Stewart (1984); Papers: Beydoun et al. (1985), Carswell and Moon
(1989), Cybriwsky et al. (1984), Hennon et al. (1991), Imse and Levine
(1985), King et al. (1989), Levine et al. (1984), Majer et al. (1988), Paillet
et al. (1986), Stewart et al. (1981), Streitz (1987), Suprahitho and
Greenhalgh (1986)

Cross-Hole Shear: Bates et al. (1991), CH2M Hill (1991), Hoar and
Stokoe (1977), Stokoe (1980), Stokoe andNazarian (1985), Woods
(1978), Woods and Stokoe (1985); Other Cross-Hole: Bois et al. (1972),
Butler and Curro (1981), Jackson et al. (1992), Jessop et al. (1992),
McCann et al. (1986), Pratt and Worthington (1988)

Anderson and Dziewonski (1984), Bates et al. (1991), Devaney (1984),
Jackson  et al.  (1992), Jessop et al. (1992),  King and Witten (1989,  1990),
Mahannah et al. (1988), Pratt and Worthington (1988), Tweeton (1988),
Tweeton et al. (1991), Tura et al. (1992), Wong (1991), Wu and Toksoz
(1987); see also Table 7-9
                                                 7-31

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Table 7-13 Index for References on Miscellaneous Logging Methods
Topic
References
Flow Measurement

Borehole Dilution


Brine Tracing

Thermal  Flowmeters
EM Flowmeter

Mechanical Flowmeters


Other Methods

Temperature

Caliper



Borehole Cameras



Borehole Televison
Borehole Gravity


Magnetic Susceptibility
Dexter and Kearly (1988), Halevy et al. (1967), Leap and Kaplan (1988),
McLinn and Palmer (1988, 1989), Taylor et al. (1988)

Williams et al. (1984), Patten and Bennett (1962), Yearsley et al. (1990b)

Chapman and Robinson (1962), Guthrie (1986), Hess (1982,  1984, 1986,
1989), Hess and Paillet (1989), Kerfoot (1982, 1984,  1988, 1992), Kerfoot
and Kiely (1989),  Kerfoot et  al. (1991), Melville et al. (1985), Molz et al.
(1990), Paillet (1989b), Paillet et al. (1987), Williams and Conger (1990),
Rehfeldt (1989)

Young and Waldrop (1989),  Young and Pearson (1990)

Erickson (1946), Fiedler (1928), Hess and Wolf (1991), Molz et al.
(1989), Patten and Bennett (1962), Syms (1982)
See listing for Borehole Temperature Logging in Table 6-4.

Edwards and Stroud (1966), Hilchie (1982), Lattman and Parizek (1964),
Mickam et al.  (1984), Lee et al.  (1987), Parizek and Siddiqui (1970),
Sutcliffe and Joyner (1966),  Syms (1982)

Jensen and Ray (1965), Johnson and Gnaedinger (1964-bibliography),
Mullins (1966), Sturges (1967), Trainer and Eddy (1964-borehole
periscope)

Briggs (1964), Callahan et al. (1963),  Gernand (1991), Gorder (1963),
Huber (1982), Kearl et al. (1992-colloidal horoscope), Lloyd (1970),
Michalski et al. (1992), Morahan and  Dorrier (1984), Thomas and Dixon
(1989), Zemanek et al. (1969, 1970)

Head and Kososki  (1979), Hearst and Carlson (1982), Labo (1987),
Robbins (1986)

Scott et al. (1981)
                                               7-32

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Table 7-14 Index for References on Applications of Borehole Geophysics in Hydrogeologic and
Contaminated Site Investigations
Topic
References
Contaminated  Site Applications
Case Studies
Ground-Water Monitoring

Lithologic  Characterization

Fractured Rock
Solution Cavities

Stratigraphy/Structure


Lithology
Adams et al. (1983), Adams et al. (1988), Asch et al. (1986), Crowder and
Irons (1988), Crowder et al. (1987), Davison et al.  (1982-nuclear waste
storage),  Dearborn (1988), DiNitto (1983), Deluca and Buckley (1985),
Hess et al. (1984), King et al. (1989—buried wastes), Michalski (1989),
Mahannah et al. (1988), Michalski et al. (1992), Montgomery et al.
(1985), Olhoeft et al.  (1992-DNAPL spill), Poeter  (1988), Ring and Sale
(1987), Robbins (1986), Tests (1988), Rutkowksi and Taylor
(1990-radioactive contamination), Sciacca (1991), Schneider and
Greenhouse (1992), Sloto et al. (1992), Turner and Black (1989),
Tweeton  et al.  (1991—in  situ mining leachate),  U.S. EPA (1987),
Westphalen (1991), Wheatcraft et al. (1987), Williams and Conger (1990),
Wilt and  Tsang (1985)

Morahan and Dorrier (1984), Voyteck (1982)
Adams et al. (1988), Bates et al. (1991), Beydoun et al. (1985), Brother et
al. (1990), Carswell and Moon  (1989), Collier and Ridder (1992),
Cybriwsky et al. (1984), Dearborn (1988), DeLuca and Buckley  (1985),
Haase and King (1986), Havranek and Smith (1989), Hess (1984, 1986),
Hess and Paillet (1989), Holzhausen and Egan (1986), Howard  et al.
(1986), Imse and Levine (1985), Jones et al. (1984), Lee et al. (1984),
Levine et al. (1984), Majer et al. (1988), Merin (1992), Michalski et al.
(1992), Morin and Barrash (1986), Nelson (1985), Paillet (1984, 1989b),
Pailett et al. (1985, 1986, 1987), Richardson et al. (1989), Robbins and
Hayden (1988), Ross and Ward (1984), Sandberg et al. (1991), Schaar
(1992), Silliman et  al. (1987), Stewart et al. (1981), Tsang et al.  (1992),
Tura et al. (1992), Westphalen (1991), Williams et al. (1984), Yearsley et
al. (1990b)

Bates et al. (1991)

Davis et al. (1984), Potts (1991), Senger (1985-glacial), Sciacca (1991),
Spencer (1985)

Biella et al. (1983), Norris (1972), Woodward (19841), Wyllie (1960)
                                                7-33

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                                         Table 7-14 (cont.)
Topic
References
Aquifer Characterization Applications
Ground-Water Studies
Permeability/
Hydraulic Conductivity
Other Hydraulic Properties
Water Quality
Aquifers with High
Secondary Porosity
Well Construction
Crosby and Anderson (1971), Dyck et al. (1972), Greenhouse et al.
(1990), Hanson (1967), Head and Merkel (1977), Keys and Brown (1971,
1973—artificial recharge), Lee et al. (1984), Heeley and Marshall (1985),
MacCary (1983), Mickam et al. (1984), Newman and McDuff (1988),
Taylor (1986), Taylor and Wheatcraft (1986), Wrege et al. (1986),
Perched Water Table: Poeter (1987, 1988)

Blankennagel (1968-hydraulic testing),  Bredehoeft (1964-permeability),
Croft (1971), Henrich (1986-transmissive layers), Hess (1989),
Hufschmied (1986), Jorgenson (1989),  Kwader (1984a),  Levine et al.
(1984), Morin and Barrash (1986-fracture flow), Paillet et al. (1987),
Pedlar et al. (1990), Rabe (1956), Rehfeldt (1989), Schimschal  (1981),
Sutcliffe and Joyner (1966-packer testing), Taylor et al. (1988), Tsang et
al. (1992), Young and Pearson (1990)

Porosity Bleakley et al. (1965), Jorgenson (1989), MacCary (1984a),
Pickett (I960), Taylor et al. (1988), Tittman et al. (1966), Worthington
(1976); Specific Yield: Johnson (1967), Jones and Schneider (1969),
Levine et al.  (1984): Other: Bennett and Patten (1960-specific capacity),
Diodato and Parizek (1992), Gernand (1991), MacCary
(1984b-formation factor), Meyer (1963— storage coefficient), Moltyaner
(1989—aquifer  parameters)

Alger (1966), Barnes and Livingston (1947), Brown (1971), Guyed (1957,
1966), Kwader (1984b, 1985, 1986), MacCary (1980), Peterson (1991),
Poland and Morrison (1940), Poole et al. (1989), Pryor (1956), Turcan
(1962, 1966), Turcan and Winslow  (1970), Vonhof (1966), Worthington
(1976)

Carbonates: Chombart (1960), Collier (1992), Cregon and  Moir (1961),
Haase and King (1986), Lee et al. (1984), Head and Merkel (1977),
MacCary (1971, 1978, 1980, 1983, 1984a), Parizek and Siddiqui (1970);
Basalts Crosby and Anderson (1971), Peterson and Lao (1970)

Jann (1966-borehole alignment), Kendall (1965-corrosion detection),
Killow (1966-behind casing flow), Linck (1963), Norris (1972), Yearsley
et al. (1990a-monitoring well completion); Casing Detection: Frimpter
(1969), Marsh and Parizek (1968), Ross and Adcock (\ 969) Cement Bond
Logs:Bade  (1963), Pickett (1966), Upp (1966), Landry (1992), Yearsley
et al.  (1991);  Injection Well Integrity Testing: Nielsen and Aller (1984),
Thornhill and Benefield (1990, 1992)
                                               7-34

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7.5 References

See Glossary for meaning of method abbreviations.

Abragam, A.  1961.  The Principles of Nuclear Magnetism. Clarendon Press, Oxford England 599 pp.

Adams, J.A.S. and P. Gasparini. 1970.  Methods in Geochemistry and Geophysics: Gamma Ray
        Spectrometry of Rocks. Elsevier, NY, 280 pp.

Adams, W.M., S.W. Wheatcraft, and J.W. Hess. 1983. Downhole Sensing Equipment for Hazardous
        Waste Site Investigations. In: Proc. (4th) Nat. Conf. on Management of Uncontrolled Hazardous
        Waste Sites, Hazardous Materials Control Research Institute, Silver Spring, MD, pp. 108-113.

Adams, M.L., M.S.  Turner, and M.T. Morrow. 1988. The Use of Surface and Downhole Geophysical
        Techniques  to Characterize Flow in a Fracture Bedrock Aquifer System. In: Proc. 2nd Nat.
        Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National  Water Well  Association, Dublin, OH, pp. 825-847.  [caliper, gamma, VSP,
        borehole camera]

Alderman, J.W. 1986. FM Radiotelemetry Coupled with Sonic Transducers for Remote Monitoring of
        Water Levels in Deep Aquifers. Ground Water Monitoring Review 6(2): 114-116.

Alger, R.P. 1966. Interpretation of Electric Logs in Fresh Water Wells in Unconsolidated Formations.
        In: Trans. 7th Annual Logging  Symposium, Society of Professional Well Log Analysts, Houston,
        TX.

Anderson, D.L. and  A.M. Dziewonski.  1984. Seismic Tomography. Scientific American 251(4):60.

Asch, T. and  H.F. Morrison. 1989. Mapping and Monitoring Electrical Resistivity with Surface and
        Subsurface Electrode Arrays. Geophysics 54:235-244.

Asch, T., H.F. Morrison, and S. Dickey. 1986. Interpretation of Borehole-to-Surface DC Resistivity
        Measurements at a Contaminant Site  A Case Study. In: Proc. Surface and Borehole Geophysical
        Methods and Ground Water Instrumentation Conf. and Exp., National Water Well Association,
        Dublin, OH, pp. 127-149.

Asquith, G. and C. Gibson.  1982. Basic Well Log Analysis for Geologists. American Association of
        Petroleum Geologists, Tulsa, OK 216 pp.

Atkins, Jr., E.R 1961. Techniques of Electric Log Interpretation. J. Petrol. Tech.  13(2): 188-123.

Bade, J.F. 1963.  Cement Bond Logging Techniques-How They Compare  and Some Variables Affecting
        Interpretation. J. Petrol. Tech.  15(1): 17-22.

Baffa, J.J. 1948. The Utilization of Electrical and Radioactivity Methods of Well Logging for Ground-
        Water Supply Development. J. New England Water Works Assn. 62:207-219.

Balch, A.H. and M.W. Lee (eds.).  1984. Vertical Seismic Profiling Techniques, Applications, and Case
        Histories. International Human Resource Development Corporation, Boston, MA, 488 pp.

Barnes, B.A.  and P.  Livingston. 1947. Value of the Electrical Log for Estimating Ground-Water  Supplies
        and the Quality of Ground Water. Trans. Am. Geophysical Union 28:903-911.
                                                7-35

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Bateman, R.M. 1985. Log Quality Control. International Human Resources Development Corp., Boston,
        398 pp.

Bates, R, D. Phillips, and B. Hoekstra. 1991. Geophysical Surveys for Fracture Mapping and Solution
        Cavity Delineation. In: Ground Water Management 7:659-673 (8th NWWA Eastern GW
        Conference), [shear-wave refraction, cross-borehole tomography]

Beesley, K 1986. Downhole Geophysics. In: Ground Water: Occurrence, Development and Protection,
        T.W. Brandon (ed.), Institute of Water Engineers and Scientists Water Practice Manual 5,
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Belcher, D.J., T.R. Cuykendall, and H.S. Sack. 1952. Nuclear Methods for Measuring Soil Density and
        Moisture in Thin Soil Layers. Civil Aeronautics Administration Technical Development Report
        No. 161, Washington, DC, 8 pp.

Bennett, G.D.  and E.P. Patten, Jr. 1960. Borehole Geophysical  Methods for Analyzing Specific Capacity
        of Multiaquifer Wells. U.S. Geological Survey Water Supply Paper 1536-A.

Benson, R.C. 1991. Remote  Sensing and Geophysical Methods for Evaluation of Subsurface Conditions.
        In: Practical Handbook of Ground-Water Monitoring, D.M. Nielsen (ed.), Lewis Publishers,
        Chelsea, MI, pp.  143-194. [GPR, EMI, TDEM,  ER, SRR, SRL, GR, MAG, MD, BH]

Bevc, D. and H.F. Morrison. 1991. Borehole-to-Surface Electrical Resistivity  Monitoring of a Salt Water
        Injection Experiment. Geophysics 56(6):769-777.

Beydoun, W. B., C.H. Cheng, and M.N. Toksoz.  1985. Detection of Open Fractures with Vertical Seismic
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Biella, G. A. Lozei, and I. Tabaco. 1983. Experimental  Study of Some Hydrogeophysical Properties of
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Bigelow, E.L.  1985. Making More Intelligent Use of Log Derived Dip Information, Parts I-V. Log
        Analyst 26(1):41-51,  26(2):25-41; 26(3): 18-31; 26(4):21-43; 26(5):25-64.

Birdwell Division.  1973. Geophysical Well Log Interpretation.  BirdWell Division, Seismograph Service
        Corporation, Tulsa, OK. [Birdwell Division  is no longer in operation.]  [SP, resistivity, gamma,
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Blankennagel, R.K 1968.  Geophysical Logging and  Hydraulic Testing, Pahute Mesa, Nevada Test Site.
        Ground Water 6(4):24-31.

Bleakley, W.B. et al. 1965. The Sidewall Epithermal Neutron Porosity Log. Soc. Petrol. Eng.  AIMME
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Blizard, E.P. 1958. Nuclear Radiation Shielding. In: Nuclear Engineering, H.  Etherington (ed.),
        McGraw-Hill, New York.

Bois, P., M. La Porte, M.  Lavergne, and G. Thomas. 1972. Well to Well Seismic Measurements.
        Geophysics 37:471-480.
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Bredehoeft, J.D. 1964. Variations in the Permeability of the Tensleep Sandstone in the Bighorn Basin,
       Wyoming, As Interpreted from Core analysis and Geophysical Logs. U.S. Geological Survey
       Professional Paper 501-D, pp. D166-D170.

Briggs, R.D. 1964. The Downhole TV Camera. In: Trans. 5th Annual Logging Symp., Society of
       Professional Well Log Analysts, Tulsaj OK pp. Nl.

Brother, M.R., J.Q. Robinson, and W.G.  Soukup. 1990.  Detection of Fractures in Sedimentary  Rock with
       Conventional Borehole Geophysics.  In: Proc. Fourth Nat. Outdoor Action Conf. on Aquifer
       Restoration, Ground Water Monitoring and Geophysical Methods. Ground Water Management
       2:939-952.

Brown, D.L. 1971. Techniques for Quality-of-Water Interpretations from Calibrated Geophysical Logs,
       Atlantic Coastal Area. Ground Water 9(4):25-38.

Brown, R.H., A.A. Konoplyantsev, J. Ineson, and V.S. Kovalensky. 1983. Ground-Water Studies: An
       International Guide for Research and Practice. Studies and Reports in Hydrology No. 7.
       UNESCO, Paris. [Originally published in 1972, with supplements added in 1973,  1975, 1977, and
        1983.] [Section 9 covers borehole geophysical techniques.]

Butler, D.K. and J.R. Curro, Jr. 1981. Crosshole Seismic Testing-Procedures and Pitfalls. Geophysics
       46(l):23-29.

Bureau of Reclamation.  1981. Ground Water Manual—A Water Resources Technical Publication,  2nd
       ed. U.S. Department of the Interior, Bureau of Reclamation, Denver, CO.

Callahan, J.T., RL. Wait, and M.J. McCollum. 1963. Television-A New Tool for the Ground-Water
       Geologist. Ground Water l(4):4-6.

Campbell, M.D. and J.H. Lehr. 1973. Water Well Technology. McGraw-Hill, New York, 681 pp.
       [Annotated bibliography contains  over 600 references.]

Canadian Well Logging Society. (Various dates.) Biannual Formation Evaluation Symposium Series.
       CWLS, Calgary, Canada. [Published  symposia include 2nd (1968), 6th (1977),  7th (1979), 8th
       (1981), 9th (1983), llth (1987), 12th  (1989), and  13th (1991)]

Carswell, A. and W.M. Moon. 1989. Application of Multioffset Vertical Seismic Profiling in Fracture
       Mapping.  Geophysics 54:737-746.

Carter, V.B. 1966, Supplementary Sample Logs. Ground Water 4(3):49-51.  [electric logs]

Chapman, H.T.  and A.E. Robinson.   1962. A Thermal Flowmeter for Measuring Velocity for Flow  in a
       Well. U.S. Geological Survey Water-Supply Paper 1544-E, 12 pp.

Chombart, L.G. 1960. Well Logs in Carbonate Reservoirs. Geophysics 25(4):779-853.

CH2M Hill.  1991. Proceedings: NSF/EPRI Workshop on Dynamic Soil Properties and Site
       Characterization, Vol 1. EPRI NP-7337. Electric Power Research Institute, Palo Alto, CA
       Chapter 3 (Low- and High-Strain Cyclic Material Properties covers uphole-downhole seismic
       methods).
                                             7-37

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 Collier, H.A. 1989a. A Guide to Selecting the Proper Borehole Resistivity Logging Suite. In: Proc. (2nd)
        Symp. on the Application of Geophysics to Engineering and Environmental Problems, Soc. Eng.
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 Collier, H.A. 1989b. Assessment of the Dielectric Tool as a Porosity Log. In: Proc. Third Nat. Outdoor
        Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical Methods,
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 Collier, H.A. 1992. Proper Application of Borehole Geophysical Techniques to the Evaluation of a
        Carbonate Aquifer A Case History. In: SAGEEP '92, Society of Engineering and Mineral
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 Collier, H.A. and R.P. Alger. 1988. Recommendations for Obtaining Valid Data from Borehole
        Geophysical Logs. In Proc. 2nd Nat. Outdoor Action Conf.  on Aquifer Restoration, Ground
        Water Monitoring and Geophysical Methods, National Water Well Association, Dublin, OH, pp.
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 Collier, H. and M. Ridder. 1992. Utilization of the Borehole Televiewer in Fracture Analysis. In:
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 Cregon, D.J. and H.  Moir. 1961. Evaluation of Limestone Formation Characteristics from Well Logs. J.
        Petrol. Tech. 12(11): 1087-1092.

 Croft, M.G. 1971. A Method of Calculating Permeability from Electric Logs. U.S. Geological Survey
        Professional Paper 750-B, pp. 265-269

 Crosby, III, J.W. and J.V. Anderson 1971. Some Applications of Geophysical Well Logging to Basalt
        Hydrogeology.  Ground Water 9(5): 12-20.

 Crowder, R.E. and L. Irons. 1988. Borehole Geophysical Logging Case  Histories for Hazardous Waste
        Investigations. In: Proc. (1st) Symp. on the Application of Geophysics to Engineering and
        Environmental Problems, Soc. Eng. and Mineral Exploration Geophysicists, Golden, CO, pp. 747-
        753.

 Crowder, R.E. and L. Irons. 1989. Economic Considerations of Borehole Geophysics for Engineering and
        Environmental Projects. In: Proc. (2nd) Symp. on the Application of Geophysics to Engineering
        and Environmental Problems, Soc. Eng. and Mineral Exploration Geophysicists, Golden, CO,  pp.
        325-338.

 Crowder, R. E., L. Brouillard, and L. Irons. 1987. Utilizing A Borehole Geophysical Logging Program in
        Poorly Consolidated Sediments for a Hazardous Waste Investigation: A Case History. In:  Proc.
        2nd Int. Symp. on Borehole Geophysics for Minerals, Geotechnical and Groundwater
        Applications, pp. 65-75.

 Crowder, R.E., J.J. LoCoco, and E.N. Yearsley. 1991. Application of Full Waveform Borehole Sonic
        Logs to Environmental and Subsurface Engineering Investigations. In: Proc. (4th) Symp. on the
       Application of Geophysics to Engineering and Environmental Problems, Soc. Eng. and Mineral
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Cybriwksy, Z.A., E.N. Levine, and M.N. Toksoz. 1984. Detection of Permeable Rock Fracture Zones
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        Division Eastern Regional Ground Water Conference (Newton, MA), National Water Well
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Daily, W. and E. Owen. 1991. Cross-Borehole Resistivity Tomography. Geophysics 56(8): 1228-1235.

Dakhnov, V.N.  1962. Geophysical Well Logging: The Application of Geophysical Method, Electrical Well
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Daniels, J.J. 1977. Three-Dimensional Resistivity and Induced-Polarization Using Buried Electrodes.
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Daniels, J.J. 1983. Hole-to-Surface Resistivity Measurements. Geophysics 48(l):87-97.

Darr, P. S., R.H. Gilkeson, and E. Yearsley. 1990. Intercomparison of Borehole Geophysical Techniques
        in a Complex Depositional Environment. In: Proc. Fourth Nat. Outdoor Action Conf. on Aquifer
        Restoration, Ground Water Monitoring and Geophysical Methods. Ground Water Management
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Davis, R.W. 1989. Developments in Cross Borehole Tomography. In: Proc.  (2nd) Symp. on the
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Davis, S.N. and R.J.M. DeWiest. 1966. Hydrogedogy. John Wiley& Sons, New York, 463 pp.  [Chapter
        8 covers surface and borehole geophysical methods.]

Davis, J.L., R.W.D.  Killey, A.P. Annan, and C. Vaughn. 1984. Surface and Borehole Ground-Penetrating
        Radar Surveys for Mapping Geological Structure.  In NWWA/EPA Conf. on Surface and
        Borehole Geophysical Methods in Ground Water Investigations (1st,  San Antonio TX), National
        Water Well Association, Dublin, OH, pp. 681-712.

Davison, C. C.,  W.S. Keys, and F.L. Paillet. 1982. Use of Borehole Geophysical Logs and Hydrologic
        Tests to Characterize Crystalline Rock for Nuclear Waste Storage, Whiteshell Nuclear
        Establishment, Manitoba, and Chalk River Nuclear Laboratory, Ontario, Canada. Office of
        Nuclear Waste Isolation Paper ONWI-418, 103 pp.

Dearborn, L.L.  1988. Borehole Geophysical Investigations of Fractured Rock at an EPA Superfund Site
        in Massachusetts. In: Proc. 2nd Nat. Outdoor Action Conf.  on Aquifer Restoration, Ground
        Water Monitoring and Geophysical Methods, National Water Well  Association, Dublin,  OH, pp.
        875-895.

DeLuca, R.J.  and B.K. Buckley. 1985. Borehole Logging to Delineate Fractures in a Contaminated
        Bedrock Aquifer. In: NWWA Conf. on Surface and Borehole  Geophysical Methods in Ground
        Water Investigations (2nd Fort Worth, TX), National Water Well Association, Dublin, OH, pp.
        387-398.

Desaubies, Y., A.  Tarantola, and J. Zinn-Justin (eds.). 1990. Oceanographic and Geophysical
        Tomography. Elsevier, New York, 463  pp.

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Dexter, J.J. and P.M. Kearl. 1988. Measurement of Groundwater Velocity with a Calorimetric Borehole
        Dilution Instrument. In: Proc. of the Focus Conf. on southwestern Ground Water Issues
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Dickinson, W., R.W. Dickinson, P.A. Mote, and J.S. Nelson. 1987. Horizontal Radials for Geophysics
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Dines, K.A. and R.J. Lytle. 1981. Analysis of Electrical Conductivity Imaging. Geophysics 46(7): 1025-
        1036. [EM tomography]

DiNitto, R.G. 1983. Evaluation of Various Geotechnical and Geophysical Techniques for Site
        Characterization Studies Relative to Planned Remedial Action Measures. In: Proc. 4th Nat. Conf.
        on Management of Uncontrolled Hazardous Waste Sites, Hazardous Materials Control Research
        Institute, Silver Spring, MD,  pp. 130-134.

Diodato, D.M. and R.R. Parizek.  1992. Hydrogeologic Parameters of Reclaimed Coal Strip Mines  from
        Borehole Geophysical Surveys. In:  SAGEEP '92, Society of Engineering and Mineral Exploration
        Geophysicists, Golden,  CO, pp. 71-90.

Doveton, S.H. 1986. Log Analysis of  Subsurface Geology Concepts and Computer Models. John Wiley
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Dresser Atlas. 1975. Log Interpretation Fundamentals. Dresser Atlas Division, Dresser Industries,
        Houston, TX, 125  pp.

Dresser Atlas. 1979. Log Interpretation Charts. Dresser Atlas  Division,  Dresser Industries, Houston, TX.

Dresser Atlas. 1982. Well Logging  and Interpretation Techniques The Course for Home Study. Dresser
        Atlas Division, Dresser Industries, Houston, TX, 350 pp.

Driscoll. F.G. 1986. Groundwater and  Wells, 2nd ed.  Johnson  Filtration Systems Inc., St. Paul, MN,
        1089 pp. [Chapter  8 covers borehole geophysical methods: resistivity, SP, gamma,  gamma-gamma,
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Dyck A.V.  1991. Drill-Hole Electromagnetic Methods.  In: Electromagnetic Methods in Applied
        Geophysics,  Vol. 2, Applications, M.N. Nabighian (ed.), Society of Exploration Geophysicists,
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                                              7-40,

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Dyck J. H., W.S. Keys, and W.A. Meneley. 1972. Application of Geophysical Logging to Groundwater
        Studies in Southern Saskatchewan. Canadian J. Earth Sciences 9(l):78-94.

Edwards, J.M. and S.G. Stroud. 1966. New Electronic Casing Caliper Log Introduced for Corrosion
        Detection. J. Petrol. Tech. 18(8):933-938.

Ellis, D.V.  1987. Well Logging for Earth Scientists. Elsevier, New York, 532 pp.  [SP, resistivity,
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Emerson, D.W. and S.S. Webster. 1970. Interpretation of Geophysical Logs in Bores in Unconsolidated
        Sediments. Australian Water Resources Council Research Project 68fl-Phase I, 212 pp.

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Erickson, C.R 1946. Vertical Water Velocity in Deep Wells. J. Am. Water Works Ass. 38:1263-1272.

Evans, H.B. 1970. Status and Trends in Logging.  Geophysics 35(1):93-112.

Everett, L.G. 1985.  Groundwater Monitoring Handbook for Coal and Oil  Shale  Development. Elsevier,
        New York. [Section 8 covers borehole geophysical methods:  temperature, caliper, gamma, flow,
        radioactive tracer, 3-D velocity (acoustic waveform), acoustic, gamma-gamma, electric,  acoustic-
        televiewer.]

Fiedler, A.G. 1928.  The Au Deep-Well Current Meter and Its Use in the Roswell Artesian Basin, New
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        Interpretation. Reprint Series Nos. 16 and 17, American Association of Petroleum Geologists,
        Tulsa,  OK, (I) 742 pp., (11) 600 pp. [resistivity,  SP, gamma, porosity, dip meter, other logs]

Freedman, R. and J.P. Vogiatzis. 1979. Theory of Microwave Dielectric Constant  Logging Using the
        Electromagnetic Wave Propagation Method. Geophysics 44(5):969-986.

Frimpter, M.H. 1969. Casing Detector and Self-Potential Logger. Ground  Water 7(6):24-27.

Fujimoto, K., J.A. Wilson, and J.P. Ashmore.  1985. Radiation Exposure Risks to Nuclear Well Loggers.
        Health Physics  48(4):437-445.

Gal'perin, E.I. 1974. Vertical  Seismic Profiling. Society of Exploration Geophysicists, Tulsa, OK 278 pp.


Gardner, R.P.  and K.F. Roberts. 1967. Density and Moisture Content Measurement by Nuclear Methods.
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Gernand, J.  1991. Characterization of a Bedrock Aquifer by Rock Coring,  Downhole Video and
        Borehole Geophysics. In: Ground  Water Management 7:547-561 (8th NWWA Eastern GW
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        Conference), [caliper, gamma, temperature, fluid resistivity, resistivity, SP resistivity, SP, acoustic
        waveform]

 Gonduin, M. and C. Scale. 1958. Streaming Potential and the SP Log. J. Petrol Tech. 10(8): 170-179.

 Gorder, Z.A. 1963. Television Inspection of a Gravel Pack Well. J. Am. Water Works Ass. 55:31-34.

 Greenhouse, J.P., L. Faulkner, and J. Wong.  1985. Geophysical Monitoring of an Injected Contaminant
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 Greenhouse, J.P., D.C. Nobes, and G.W.  Schneider.  1990. Groundwater Beneath the City A Geophysical
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 Guyod, H. 1952. Electrical Well Logging Fundamentals.  Well Instruments Developing Co.,  Houston,
        TX, 164 pp.

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        TX.

 Guyod,  H. 1957b. Electric Detective: Investigation of Groundwater Supplies with Electric Well Logs.
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 Guyod,  H. 1958. Electric Analogue  for Resistivity Logging.  (Published by) Hubert  Guyod, Houston, TX.

 Guyod,  H. 1965. Interpretation of Electric and Gamma Ray  Logs in Water Wells. Am.  Geophysical
        Union Technical  Paper. Mandrel Industries, Inc.  Houston, TX,

 Guyod,  H. 1966. Interpretation of Electric and Gamma Ray  Logs in Water Wells. The Log  Analyst
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 Guyod,  H. and L.E. Shane. 1969. Geophysical Well Logging, Vol. I, Introduction to Geophysical Well
        Logging and Acoustical Logging. (Published by)  Hubert Guyod Houston TX, 256 pp.  [Part I
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Haase, C.S. and J.L.  King.  1986. Application of Borehole Geophysics to Fracture Identification and
        Characterization-in Low Porosity Limestone  and  Dolostones.  In: Proc. Surface and Borehole
        Geophysical Methods and Ground Water Instrumentation Conf. and Exp., National Water Well
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        acoustic televiewer]

Halevy., E., H. Moser, O.  Zellhofer,  and A. Zuber.  1967.  Borehole Dilution Techniques:  A Critical
        Review. In: Isotopes in Hydrology, IAEA Proceedings  Series, International Atomic Energy
        Agency, Vienna, pp. 531-564.


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Hallenberg, J.K. 1983. Geophysical Logging for Mineral and Engineering Applications. Penn Well
        Books, 264 pp.

Hallenberg, J.K. 1984. Formation Evaluation Programs. Pern Well Books, 120 pp.

Hamilton, R.G. and J.I. Myung. 1979.  Summary of Geophysical Well Logging. Birdwell  Division,
        Seismograph Service Corporation, Tulsa OK, 32 pp.

Hansen,  H.J.  1967. The Electric  Log Geophysics' Contribution to Ground Water Prospering and
        Evaluation. Maryland Geological Survey Information Circular No. 4, 11 pp.

Hardage, B.A. 1985.  Vertical  Seismic Profiling, Part A Principles, 2nd enlarged edition. Seismic
        Exploration, Vol. 14A Geophysical Press, London, 450 pp. [1st edition 1982]

Havranek T.J. and W. Smith.  1989. Application of Downhole Geophysical Methods and Discrete Zone
        Sampling Techniques in the Investigation of a Fractured Bedrock Aquifer. In: Proc. (6th)
        NWWA/API Conf. on Petroleum Hydrocarbons and Organic  Chemicals in Ground Water:
        Prevention, Detection and Restoration, National Water Well Association,  Dublin, OH, pp.  109-
        123.

Head, W.J. and B.A.  Kososki. 1979. Borehole Gravity A New Tool for the Ground-Water Hydrologist
        (Abstract). Trans. Am. Geophys. Union 60:248.

Head, W.J. and R.H.  Merkel.  1977. Hydrologic Characteristics of the Madison Limestone, The
        Minnelusa Formation, and Equivalent Rocks as Determined by Well-Logging Formation
        Evaluation. J. Research of the U.S. Geological Survey 5(4):473-485.

Hearst, J.R. and R.C. Carlson. 1982. Measurement and Analysis of Gravity in Boreholes. Developments
        in Geophysical Exploration Methods 4:269-303.

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Morrison, R.D. 1983. Groundwater Monitoring Technology. Timco Mfg., Inc. Prairie du Sac, WI, 105
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Mullins, J.E.  1966. Stereoscopic Deep Well Photography in Opaque Fluids.  In: Trans. 7th Annual
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National Water Well Association (NWWA). 1984. NWWA/EPA Conference on Surface and Borehole
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National Water Well Association (NWWA). 1985. NWWA Conference on Surface and Borehole
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National Water Well Association (NWWA). 1986. Surface and Borehole Geophysical Methods and
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Nelson, R.A. 1982. Advances in Borehole Geophysics for Hydrology. In: Recent Trends in
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Olhoeft, G.R. 1988. Interpretation  of Hole-to-Hole Radar Measurements. In: Proc.  of the 3rd
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Olhoeft, G.R. and J.H.  Scott. 1980.  Nonlinear Complex Resistivity Logging. In: Trans of SPWLA 21st
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Olhoeft, G.R., K.A. Sander, and J.E. Lucius.  1992. Surface and Borehole  Radar Monitoring of a DNAPL
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Paillet, F.L. 1984. Well Log Characterization of Fractured  Rock Hydrology. In: NWWA/EPA Conf. on
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Paillet, F.L. 1989b. Analysis of Geophysical Well Logs and Flow Meter Measurements in Boreholes
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Paillet, F.L. and J.E. White. 1982. Acoustic Modes of Propagation in the Borehole and Their
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Paillet, F.L., A.E. Hess, C.H. Cheng, and E.L. Hardin.  1985. Effects of Lithology on Televiewer-Log
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Paillet, F.L., C.H. Cheng, A.E. Hess, and E.L. Hardin. 1986. Comparison of Fracture Permeability
        Estimates Based on Tube-Wave Generation in Vertical Seismic Profiles, Acoustic Waveform-Log
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Paillet, F.L., A.E. Hess, C.H. Cheng, and E.L. Hardin. 1987. Characterization of Fracture Permeability
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Parizek, R.P. and S.H. Siddiqui. 1970. Determining the Sustained Yield of Wells in Carbonate and
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Patten, Jr., E.P. and G.D. Bennett.  1962. Methods of Flow Measurements in Well Bores. U.S.
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Patten, Jr., E.P. and G.D. Bennett. 1963. Application of Electrical and Radioactive Well Logging to
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Pedlar, W.H., C.L. Head and L.L. Williams. 1992. Hydrophysical Logging A New Wellbore Technology
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Peterson, B.R. 1991.  Borehole Geophysical Logging Methods for Determining Apparent Water
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Peterson, F.L. and C. Lao. 1970. Electric Well Logging of Hawaiian Basaltic Aquifers. Ground Water
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Pickell, J.J. and J.G. Heacock. 1960. Density Logging. Geophysics 25:891-904.


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Pickett, G.R. 1960. The Use of Acoustic logs in the Evaluation of Sandstone Reservoirs. Geophysics
        25:250-274.

Pickett, G.R. 1966. Prediction of Intrazone Fluid Communication Behind Casing by Use of Cement Bond
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Pickett, G.R. 1970. Applications for Borehole Geophysics in Geophysical Exploration. Geophysics
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Pirson,  S.J. 1963. Handbook of Well. Log Analysis for Oil and Gas Formation Evaluation. Prentice-Hall,
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Pirson,  S.J. 1983. Geologic Well Log Analysis,  3rd ed. Gulf Publishing Co., Houston, TX. [SP, Eh,
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Poeter,  E.P. 1987. Perched Water Identification with Radiation Logs. In: Proc. of the NWWA Focus
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Poeter,  E.P. 1988. Perched Water Identification with Nuclear Logs. Ground Water 26(1): 15-21.
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Poole, V.L., K. Cartwright, and D. Leap. 1989. Use of Geophysical Logs to Estimate Water Quality of
        Basal Pennsylvanian Sandstones, southwestern Illinois. Ground Water 27(5):682-688. [See also
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Potts, R.L. 1991. Use  of Borehole Geophysics for Stratigraphic Analysis and Horizon Delineation. In:
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Pratt, R.G. and M.H. Worthington.  1988. The Application of Diffraction Tomography to Crosshole
        Seismic Data.  Geophysics 53:1284-1294.

Prensky, S.E. (Various dates.) Log Analyst Geologic Applications Bibliographies. Geological
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        B 28(1) :71-107  Part C 28(2):219-248); Annual Update, October 1986 through September 1987
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        1988 (Log Analyst,  1988: 29(6):426-443); Bibliography of Well Log Applications: October 1988-
        September 1989  Annual Update (Log Analyst, 1989  30(6):448-470); October 1989-September 1990
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Pryor, W.A. 1956. Quality of Groundwater Estimated from Electric Resistivity Logs. Illinois State
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Quirein, J.A., J.S. Gardner, and J.T. Watson. 1982. Combined Natural Gamma Ray Spectral/Lith-Density
       Measurements Applied to Complex Lithologies. Soc. of Petrol. Eng. of AIMME, Paper SPE
        11143, 14pp.

Rabe, C.L. 1956. A Relation Between Gamma Radiation and Permeability of Denver-Julesburg Basin.
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Redwine,  J. et al. 1985.  Groundwater Manual for the Electric Utility Industry,  Vol. 3:  Groundwater
       Investigations and Mitigation Techniques.  EPRI CS-3901. Electric Power Research Institute,
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Reed, P.C. 1985. Comparative Analysis of Surface Resistivity Surveys and Natural-Gamma Radiation
       Borehole Logs in Illinois. In: Conference on Surface and Borehole Geophysical Methods and
       Ground Water Investigations (2nd, Fort Worth, TX), National Water Well Association, Dublin,
       OH, pp. 215-227.

Reed, P.E., P.O.  DuMontelle, M.L. Sargent and M.M. Killey. 1983. Nuclear Logging and Electrical
       Earth Resistivity Techniques in the Vadose Zone in Glaciated Earth Materials. In: Proc.
       NWWA/EPA Conf. on Characterization and Monitoring in the Vadose (Unsaturated) Zone (1st,
       Las Vegas, NV), National Water Well Association, Dublin, OH, pp. 580-601.

Rehfeldt, K.R. 1989. Application of the Borehole Flowmeter Method to Measure the Spatially Variable
       Hydraulic Conductivity at the Macro-Dispersion Experiment (MADE) Site. In: Proc. Conf. on
       New Field Techniques for Quantifying the Physical and Chemical Properties of Heterogeneous
       Aquifers, National Water Well  Association, Dublin, OH,  pp. 419-444.

Rehm, B.W., T.R. Stolzenburg, and D.G. Nichols.  1985. Field Measurement Methods for Hydrogeologic
       Investigation: A Critical Review of the Literature. EPRI EA-4301.  Electric Power Research
       Institute,  Palo Alto, CA. [Section 5 covers electrical, nuclear,  acoustic, and flow logs.]

Respold,  H. 1989.  Well Logging in Groundwater Development. International  Contributions to
       Hydrogeology, Vol. 9, International  Association of Hydrogeologists, Verlag Heinz Heise,
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Richardson, Jr., W.K, G.L. Kirkpatrick, and S.P. Cline. 1989. Integration of Borehole Geophysics and
       Aquifer Testing  to Define a Fractured Bedrock Hydrogeologic System.  In: Superfund '89,
       Proceedings of the 10th Annual Conference, Hazardous  Material Control  Research Institute,
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Rider, M.H. 1986. The Geological  Interpretation of Well Logs. Halstead Press, New York, 175 pp. [SP,
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Ring, G.T. and T.C. Sale. 1987. Evaluation of Well Field Contamination Using Downhole Geophysical
       Logs and Depth-Specific Samples. In: Superfund '87, Proceedings of the 8th Annual Conference,
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Ritchey, J.D., 1986. Electronic Sensing Devices Used for In Situ Ground Water Monitoring. Ground
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Robbins,  S.L. 1986. The Use of Borehole Gravimetry in Water Well and Waste Disposal Site
       Evaluations. In:  Proc. Surface  and Borehole Geophysical Methods and Ground Water
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Robbins, G.A. and J.M. Hayden. 1988. Application of Cross-Well Voltage Measurements for Assessing
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Ross, S.H. and G. Adcock. 1969. Direct Conductance Method of Measuring Casing Lengths. Ground
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Ross, H.P. and S.H. Ward 1984. Borehole Electrical Geophysical Methods: A Review of the State-of-
        the-Art and Preliminary Evaluation of the Application to Fracture Mapping in Geothermal
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Roy, A. 1975. New Results in Resistivity Well Logging.  Geophysical Prospecting 23(3):426-448.
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        26(2):481-485.

Roy, A. 1982. Focused Resistivity Logs. Developments  in Geophysical Exploration Methods 3:61-94.

Russell, W.L. 1941. Well Logging by Radioactivity. Am. Assn. Petrol. Geol. Bull. 25(9): 1768-1788.

Rutkowski, M.A.  and R.W. Taylor. 1990. A Geophysical Study of the Radioactive Contamination of the
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Sandberg, E.  V., O.L. Olsson, and L.R. Falk. 1991. Combined Interpretation of Fracture Zones in
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Schimschal, U.  1981. The Relationship of Geophysical to Hydraulic Conductivity at the Brantley Dam
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Schneider, GJ.  1982. In Situ Neutron Activation Analysis. In Premining Investigations for Hardrock
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Segesman,  F.F.  1980. Well-Logging  Method.  Geophysics 45(11): 1667-1684.

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Tellam, J.H. 1992. Reversed Flow Test: A Borehole Logging Method for Estimating Pore Water Quality
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Testa, S.M.  1988. Benefits of Downhole Geophysical Methods in Low Permeability Hydrogeologic
        Environments. In: Proc. 2nd Nat. Outdoor Action Conf. on Aquifer Restoration, Ground Water
        Monitoring and Geophysical Methods, National Water Well Association, Dublin, OH, pp. 969-985.

Theys, P.P.  1991. Log Data Acquisition and Quality Control. Editions Technip, Paris, 326 pp.

Thomas, M.D. and D.F. Dixon (eds.).  1989. Proceedings of a Workshop on Geophysical and Related
        Geoscientific Research at Chalk River, Ontario. AECL-9085, Atomic Energy of Canada Limited.
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        televiewer, spectral  gamma)]

Thornhill, J.T. and E.G. Benefield. 1990. Injection-Well Mechanical Integrity. EPA/625/9-89/007, 123 pp.
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Thornhill, J.T. and E.G. Benefield.  1992. Detecting Water  Flow  Behind Pipe in Injection Wells.
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Tittle, C.S.  1961. Theory  of Neutron Logging I. Geophysics 26(l):27-39.

Tittman, J. 1986. Geophysical Well Logging. Academic Press, New York, 192 pp. [electrical, nuclear,
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Tittman, J. and J.S. Wahl. 1965. The Physical Foundations of Formation Density Logging (Gamma-
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Toksoz, M.N. and R.R. Stewart. 1984. Vertical Seismic Profiling, Part B: Advanced Concepts. Seismic
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Trainer, F.W. and J.E. Eddy. 1964.  A Periscope for the Study of Borehole Walls and Its Use in Ground-
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       pp.  203-206.


                                              7-60

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Tsang, C.F. and P. Hufschmied. 1988. A Borehole Fluid Conductivity Logging Method for the
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Tsang, C.,  P. Hufschmied, and F.V. Hale. 1990. Determination of Fracture Inflow Parameters with a
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Tura, M.A.C., L.R. Johnson, E.L. Majer, and J.E. Peterson. 1992. Application of Diffraction Tomography
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Turcan, Jr., A.N. 1962. Estimating  Water Quality from Electric Logs. U.S. Geological Survey
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Turcan, Jr., A.N.  1966. Calculation of Water Quality from Electrical Logs-Theory and  Practice.
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Turcan, Jr., A.N. and A.G. Winslow. 1970. Quantitative Mapping of Salinity, Volume and Yield of Saline
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Turner, W.S. and J.H. Black.  1989. The Use of Geophysical Logs in the Characterization of a
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Tweeton, D.R.  1988. A Tomographic Computer Program with Constraints to Improve Reconstruction for
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Tweeton, D.R., C.L. Cumerlato, J.C. Hanson, and H.L. Kuhlman. 1991.  Field Tests of Geophysical
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U.S. Army  Corps of Engineers.  1979. Geophysical Exploration. Engineer Manual EM 1110-1-1802,
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U.S. Environmental Protection Agency (EPA).  1987. A Compendium of Superfund Field Operations
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U.S. Nuclear Regulatory  Commission.  1985. Rules and Regulations, Title 10, Chap. 1, Code of Federal
        Regulations, Part 20, Standards for Protection Against Radiation.


                                              7-61

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van der Leeden, F.  1991. Geraghty & Miller's Groundwater Bibliography, 5th ed Water Information
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Vonhof, J.A. 1966.  Water Quality Determination from Spontaneous-Potential Electrical Log Curves. J.
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Voytek,  J. 1982.  Applications of Downhole Geophysical Methods in Ground Water Monitoring. In:
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Wahl, J.S. 1983. Gamma-Ray Logging. Geophysics 48(11): 1536-1550.

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West, R.C. and S.H. Ward. 1988. The Borehole Controlled-Source Audiomagnetotelluric Response of a
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Westphalen, O. 1991. The Application of Borehole Geophysics to Identify Fracture Zones and Define
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Wheatcraft,  S.W., K.C. Taylor, J.W. Hess, and T.M. Morris.  1986. Borehole Sensing Methods for
        Ground-Water Investigations at Hazardous Waste Sites.  EPA/600/2-86/111  (NTIS PB87-132783).

Wiebenga, W.A., W.R. Ellis, B.W. Seatonberry, and J.T.G. Andrew. 1967. Radioisotopes as Ground
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Williams, J.H. and R.W. Conger.  1990. Preliminary Delineation of Contaminated Water-Bearing
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        flowmeter]

Williams, J.H., L.D. Carswell,, O.B. Lloyd and W.C. Roth.  1984. Borehole Temperature and Flow
        Logging in  Selected Fractured Rock Aquifer in East Central Pennsylvania.  In: NWWA/EPA
        Conf. on Surface and Borehole Geophysical Methods in Ground Water Investigations (1st, San
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Wilt,  M.J. and C.F.  Tsang. 1985a. Monitoring of Subsurface Contaminants with Borehole/Surface
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        167-177.

Wong, J. 1991.  Seismic Transmission Tomography.  In: Proc. (4th) Symp. on the Application of
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        Geophysicists, Golden, CO, pp. 97-116.
                                              7-62

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Woods, R.D. 1978. Measurement of Dynamic Soil Properties. In: Proc, of the ASCE Geotechnical
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Woods, R.D. and K.H. Stokoe, II. 1985. Shallow Seismic Exploration in Soil Dynamics. In: Richart
        Commemorative Lectures, R.D. Woods (ed.), ASCE, Detroit MI, pp. 120-156.

Woodyard, D.G. 1984. Lithologic Changes in Aquifer in Southeastern Minnesota as Determined from
        Natural Gamma Borehole Logs. In: NWWA/EPA Conf. on Surface and Borehole Geophysical
        Methods in Ground Water Investigations (1st, San Antonio, TX), National Water Well
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Worthington, P.P. 1976. Hydrogeophysical Equivalence of Water Salinity, Porosity,  and Matrix
        Conduction in Arenaceous Aquifers. Ground Water 14(4):224-232.

Wrege, B.M. 1986. Surface- and Borehole-Geophysical Surveys Used to Define Hydrogeologic Units in
        South-Central Arizona. In: Proc. Conf. on Southwestern Ground Water Issues (Tempe, AZ),
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Wright,, D.L., R.D. Watts, and E. Bramsoe.  1984. A Short-Pulse Electromagnetic Transponder for Hole-
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Wu, R. and M.N. Toksoz.  1987. Diffraction Tomography and Multisource Holography Applied to
        Seismic Imaging. Geophysics 52:11-25.

Wyllie,  M.R.J. 1960. Log  Interpretation in Sandstone Reservoirs.  Geophysics 25(4):748-778.  [induction
        and others]

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Yearsley, E.N., R.E. Crowder, and L.A. Irons.  1990a. Monitor Well Completion Evaluation with
        Geophysical Density Logging. In: Proc. (3rd) Symp. on the Application of Geophysics to
        Engineering and Environmental Problems, Soc. Eng. and Mineral Exploration Geophysicists,
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Yearsley, E.N., J.J. LoCoco, and R.E. Crowder.   1990b. Borehole Geophysics Applied to Fracture
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Yearsley, E. N., R.E. Crowder, and L.A. Irons.  1991.  Monitoring Well Completion Evaluation with
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Young, S.C. and J.S. Pearson.  1990. Characterization of Three-Dimensional Hydraulic Conductivity Field
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       Management 2:83-97.
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Young, S.C. and W.R. Waldrop.  1989. An Electromagnetic Borehole Flowmeter for Measuring Hydraulic
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Zemanak, J., R.L. Caldwell, E.E. Glenn, Jr., S.V. Holcomb, L.J. Norton and A.J.R. Strange.  1969. The
        Borehole Televiewer: A New Logging Concept for Fracture Location and Other Types of
        Borehole Inspection.  J. Petroleum Technology 21(6): 762-774.

Zemanak, J., E.E. Glenn, L.J. Norton, and R.L. Caldwell. 1970. Formation Evaluation by Inspection with
        the Borehole Televiewer.  Geophysics 35(2):254-269.
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                                         APPENDIX A
 CASE STUDY  SUMMARIES FOR SURFACE AND  BOREHOLE GEOPHYSICAL METHODS
        This  appendix provides summary  information on  case  studies involving the  use of surface
(Table  A-l)  and  borehole  (Table  A-2)  geophysical  methods  at contaminated  sites.  The  following
information is  provided for each reference:  (1)  location  (if specified), (2) contaminants involved,
(3) geology  and depth to water table, where given,  (4) geophysical methods  used and  (5)
citation.  Six  geophysical methods  are listed in the methods  column:  SR  (seismic refraction),  ER
(electrical  resistivity),  EMI (electromagnetic induction), GPR (ground penetrating radar),  M
(magnetics),  and G (gravity). An "x"  is placed in the appropriate  column for each method used
at the site. If  other methods were  used the name of the method  is provided  in  the  space
available.

        The case studies are  listed  in alphabetical order  by author (last column),  and reference
citations immediately  follow  each table.  Only geophysical applications at contaminated sites  are
included in this  appendix.  Other references  on the use of surface geophysical methods for
geologic and hydrogeologic investigations can be  found in  the index reference table in the
chapter  that  covers the  method  of interest.
                                              A-l

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Table A-l Ground-Water Contamination Case Studies Using Surface Geophysical Methods
Location
Central Maryland
Metamora landfill,
Michigan (Superfund)
New Jersey
Easton, Pennsylvania
Northeast Illinois
North Bay, Ontario
Southern New Jersey
Various unspecified
locations
Wilsonville, Illinois
Las Vegas, Nevada
Borden, Ontario
Morns County, New
Jersey
West Kensington
landfill, Rhode Island
Northeastern Ohio
Clarion, Clinton, and
Butler Counties, PA
West Point, Kentucky
Monterey County,
California
Contaminant
LUST (fuel oil and
gasoline)
Buried drums, heavy
metals and organics
Sodium chromate and
sodium hydroxide
Siting of ash dis-
posal impoundment
4 sanitary landfills
Landfill leachate
Landfill leachate
Buried wastes,
landfill leachate
Buried drums with
hazardous wastes
Hydrocarbon spill
Landfill leachate
Industrial waste
(VOCs and iodide)
Landfill leachate
Oil-field brine
Acid mine drainage
Oil-field brine
Salt-water intrusion
Geology Methods
SKEKEM1GFKMG
Alluvial aquifer (10-35 ft) x x x
over fractured gneiss
300 ft of complex x x x
glacial deposits over
sandstone aquifer
1 1 5 ft sand aquifer over x
clay
Alluvial and glacial x
outwash over karst
Various unconsolidated x Thermal
glacial and outwash
deposits
30-45 ft of glaciolacustrine x
silty sands over igneous
Sand and gravel aquifer x x
Unconsolidated material x x x x x
90 ft of glacial till x
over shale
Alluvium, water table x x
0-30 ft
90 ft sand aquifer x x
8-60 ft glacial sands, x x
silts, and clays over gneiss
Sand and gravel aquifer x
Sandstone aquifer x x
Coal strip mine spoils x
Sand and gravel aquifer x
sand and gravel aquifers x
180-500 ft deep
Reference
Adams et al. (1988)
Allen and Rogers (1989)
Berk and Yare (1977)
Blackey and Stoner( 1988)
Cartwright and
McComas (1968)
Cosgraveetal.(1987)
Emilsson and
Wroblewski (1988)
Evans and Schweitzer (1984)
Gllkeson et al. (1986)
Glaccum et al. (1983)
Greenhouse and Harris (1983)
Hall and Pasicznyk( 1987)
Kelly (1976)
Knuth(1988)
Ladwig (1983)
Lyverse (1989)
Mills etal. (1987)
                                                    A-2

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                                                            Table A-l (cont)
 Location
 Contaminant
Geology
                                   Methods
                                                                           SK UK Mil GFK M G
                          Reference
 Southeastern Idaho    Metals manufacturing
                      waste disposal ponds
 Reno, Nevada         Saline water
Tippecanoe County,    Landfill leachate,
Indiana               buried metals
Braccbridge,  Ontario   Landfill leachate
                      (TCE contamination)
Saukville,  Wisconsin    Fly ash leachate
Northwest Missouri
Eastern North
Carolina
Newark International
Airport, New Jersey
Landfill leachate
Jet fuel leak
Jet fuel leak
Western Massachusetts
Utah
Landfill leachate
Uranium  mill tailings
Fractured and faulted
basalt aquifer
Volcanic lavas and tuffs
ground water at 250 ft
Clay-rich glacial till
over sand and gravel
aquifer
Glacial sand and gravel
over granite
Glacial sand and gravel
aquifer over dolomite
Missouri River floodplain
Alluvial  sands and clays
50-75 ft silt, sand, and
clay over shale
Citrus and Collier
Counties, Florida
Landfill (unspecified)
Four locations
(unspecified)
75 km east of San
Francisco, California
Saltwater intrusion
Landfill leachate
Industrial waste,
landfill leachate
Landfill leachate
Floridan aquifer
(carbonate)
Not specified
Variable
3- 10 ft of soil over
sandstone
sand and gravel aquifer
Sandstone
                                                     X   X  X  X    XX
    X  X
       X
                                                                               X X
    X  X

X   XX
       X
                                                      Morgenstern and
                                                      Syverson (1988)
                                                      Ringstad and Bugenig (1984)

                                                      Roberts et al. (1989)

                                                      Rodrigues(1987)

                                                      Rogers and Kean (1980)

                                                      Rudy and Caoile (1984)
                                                      Saunders and Cox (1987)
                          Saunders and
                          Germeroth  (1985)
                          Stewart (1982)
                                                      Stewart and Bretnall (1986)
                                                      Stellar and Roux (1975)
                                                      Sweeney (1984)
                                                      Walsh (1988)
                                                      White and Gainer (1985)
                                                       A-3

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 Table A-2 Ground-Water Contamination  Case Studies Using Borehole  Geophysical Methods
 Location
Contaminant
Arsenal, Denver chemicals
Colorado
Northeastern
Massachusetts
(Superfund)


Florida
Landfill leachate,
Waste-injection
monitor well
 Geology
 Ground-Water
 Investigation Methods
Central Maryland LUST (fuel oil and
gasoline)
Rocky Mountain Injected hazardous
Alluvial aquifer (10-35 ft)
over fractured gneiss
Alluvium over inter-
Caliper, gamma,
vertical seismic,
borehole camera
SP, induced polari-
Adams et al. (1988)
Crowderetal. (1987)
                           bedded sandstone and
                           shale
Fractured gneiss
Sands and clays over
limestone at about
1,400 ft
zation, normal and
focused resistivity,
neutron, gamma-gamma,
gamma, caliper, fluid
resistivity, temperature,
full waveform sonic

Caliper, SP resis-
tance, fluid
resistivity & temp.,
gamma, neutron, ATV

Electric, fluid
resistivity,  caliper
velocity, gamma
Dearborn (1988)
Foster and Goolsby (1972)
Albuquerque NM VOCs
 (Superfund)
Arlington,
Oregon
RCRA facility
                           Unconsolidated sands
                           and gravels with beds
                           of silt and clay
                           Interbedded basalts and
                           sedimentary rock, water
                           table at 100-200 ft
                                Caliper, spinner,
                                brine injection,
                                resistivity,
                                temperature

                                Gamma, gamma-gamma,
                                neutron activation
                          Ring and Sale (1987)
                          Testa (1988)
Western U.S.     Heavy metal contami-
                 nation from a gas
                 processing  plant.

Northeast U.S.    Vocs
New York
TCE,PCE
                           15-105 ft of alluvial
                           soils  over limestone,
                           water table at 480 ft

                           Glacial deposits over
                           crystalline bedrock
(l)Mesozoic sediments,
(2) Precambrian
metamorphic rocks
Dual induction,
gamma- and spectro-
gamma, neutron

Caliper, SP, SP
resistance, gamma,
gamma-gamma, neutron,
ATV, temperature

Caliper, SP
resistance, fluid
resistivity,  gamma,
ATV, temperature,
thermal  flowmeter
                                                          Turner and Black
                                                          (1989)


                                                          Westphalen(1991)
Williams and Conger
 (1990)
                                                      A-4

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Table A-2 Ground-Water  Contamination Case Studies Using Borehole Geophysical Methods
Location
Contaminant
Arsenal, Denver chemicals
Colorado
Northeastern
Massachusetts
(Superfund)
Florida
Landfill leachate,
Waste-injection
monitor  well
Geology
Ground-Water
Investigation Methods
Central Maryland LUST (fuel oil and
gasoline)
Rocky Mountain Injected hazardous
Alluvial aquifer (10-35 ft)
over fractured gneiss
Alluvium over inter-
Caliper, gamma,
vertical seismic,
borehole camera
SP, induced polari-
Adams et al. (1988)
Crowderetal. (1987)
                           bedded sandstone and
                           shale
Fractured gneiss
Sands and clays over
limestone at about
1,400 ft
zation, normal and
focused resistivity,
neutron, gamma-gamma,
gamma, caliper, fluid
resistivity, temperature,
full waveform sonic

Caliper, SP resis-
tance, fluid
resistivity & temp.,
gamma, neutron, ATV

Electric, fluid
resistivity,  caliper
velocity, gamma
Dearborn (1988)
Foster and Goolsby (1972)
Albuquerque NM VOCs
 (Superfund)
Arlington,     —
Oregon
RCRA facility
                           Unconsolidated sands
                           and gravels with beds
                           of silt and clay
                           Interbedded basalts and
                           sedimentary rock, water
                           table at 100-200 ft
                                Caliper, spinner,
                                brine injection,
                                resistivity,
                                temperature

                                Gamma, gamma-gamma,
                                neutron activation
                          Ring and Sale (1987)
                          Testa (1988)
Western U.S.     Heavy metal contami-
                 nation from a gas
                 processing  plant.

Northeast U.S.    VOCs
New York        TCE. PCE
                           15-105 ft of alluvial
                           soils  over limestone;
                           water table at 480 ft

                           Glacial deposits over
                           crystalline bedrock
                            l)Mesozoic sediments,
                            2) Precambrian
                           metamorphic rocks
                                Dual induction,
                                gamma- and spectro-
                                gamma, neutron

                                Caliper, SP, SP
                                resistance, gamma,
                                gamma-gamma, neutron,
                                ATV, temperature

                                Caliper, SP
                                resistance, fluid
                                resistivity, gamma,
                                ATV, temperature,
                                thermal flowmeter
                          Turner and Black
                          (1989)


                          Westphalen(1991)
                          Williams and Conger
                          (1990)
                                                           A-5

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References for Table A-l

Adams, M.L., M.S. Turner, and M.T. Morrow. 1988. The Use of Surface and Downhole Geophysical
        Techniques to Characterize Flow in a Fracture Bedrock Aquifer System. In: Proc. 2nd Nat.
        Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH,  pp. 825-847.

Allen, R.P. and B.A.  Rogers. 1989. Geophysical Surveys in Support of a Remedial
        Investigation/Feasibility Study at the Municipal Landfill in Metamora, Michigan. In:  Proc. 3rd
        Nat. Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH, pp. 1007-1020.

Berk, W.J. and B.S. Yare. 1977. An Integrated Approach to Delineating Contaminated Ground Water.
        Ground Water 15(2): 138-145.

Blackey, M. and D.A. Stoner. 1988. Application of Seismic Refraction Analysis to Siting a Waste
        Disposal Facility  over Carbonate Bedrock. In: Proc. 2nd Nat. Outdoor Action Conf. on Aquifer
        Restoration, Ground Water Monitoring and Geophysical Methods, National Water Well
        Association, Dublin, OH, pp. 697-706.

Cartwright, K., and M.R. McComas. 1968. Geophysical Surveys in the Vicinity of Sanitary Landfills in
        Northeastern Illinois. Ground Water 6(5):23-30.

Cosgrave, T.M., J.P.  Greenhouse, and J.F. Barker.  1987.  Shallow Stratigraphic Reflections from Ground
        Penetrating Radar. In: Proc. 1st Nat. Outdoor Action Conf. on Aquifer Restoration,  Ground
        Water Monitoring and Geophysical Methods, National Water Well Association, Dublin, OH, pp.
        555-569.

Emilsson, G.R. and R.T. Wroblewski. 1988. Resolving Conductive Contaminant Plumes in the Presence
        of Irregular Topography. In: Proc. 2nd Nat. Outdoor Action Conf. on Aquifer Restoration,
        Ground Water Monitoring and Geophysical Methods, National Water Well Association, Dublin,
        OH, pp. 617-635.

Evans, R.B. and G.E.  Schweitzer. 1984. Assessing Hazardous Waste Problems. Environ. Sci. Technol.
        18(11):330A-339A.

Gilkeson, R.H., P.C.  Heigold and D.E. Layman.  1986. Practical Application of Theoretical Models to
        Magnetometer Surveys on Hazardous Waste Disposal Sites-A Case History. Ground Water
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Glaccum, R., M. Noel, R. Evans, and L. McMillion. 1983. Correlation of Geophysical and Organic Vapor
        Analyzer Data over a Conductive Plume Containing Volatile Organies. In:  Proc. 3rd Nat.  Symp.
        on Aquifer Restoration and Ground Water Monitoring, National Water Well Association,  Dublin,
        OH, pp. 421-427.

Greenhouse, J.P. and R.D. Harris.  1983. Migration of Contaminants in Groundwater at a  Landfill: A
        Case  Study 7. DC, VLF, and Inductive Resistivity  Surveys. J. Hydrology  63:177-197.

Hall, D.W. and D.L. Pasicznyk. 1987. Application of Seismic Refraction and Terrain Conductivity
        Methods at a Ground Water Pollution Site in North-Central New Jersey. In: Proc. 1st Nat.
        Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH, pp. 505-524.
                                             A-6

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Kelly, W.E. 1976. Geoelectric Sounding for Delineating Ground-Water Contamination. Ground Water
        14:6-10.

Knuth, M. 1988. Complementary Use of EM-31 and Dipole-Dipole Resistivity to Locate the Source of
        Oil Brine Contamination. In: Proc. 2nd Nat. Outdoor Action Conf. on Aquifer Restoration,
        Ground Water Monitoring and Geophysical Methods, National Water Well Association, Dublin,
        OH, pp. 583-595.

Ladwig, K.J. 1983. Electromagnetic Induction Methods for Monitoring Acid Mine Drainage.  Ground
        Water Monitoring Review 3(l):46-57.

Lyverse, M.A. 1989. Surface Geophysical Techniques and Test Drilling Used to Assess Ground-Water
        Contamination by Chloride in an Alluvial Aquifer. In: Proc. 3rd Nat. Outdoor Action Conf.  on
        Aquifer Restoration, Ground Water Monitoring and Geophysical Methods, National Water Well
        Association, Dublin, OH, pp. 993-1006.

Mills, T., L. Evans, and M. Blohm. 1987. The Use of Time Domain Electromagnetic Soundings for
        Mapping  Sea Water Intrusion in Monterey, Co., Ca.: A Case History. In: Proc. 1st Nat. Outdoor
        Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical Methods,
        National Water Well Asociation, Dublin, OH, pp. 601-622.

Morgenstern, K.A. and T.L.  Syverson.  1988. Determination of Contaminant Migration in Vertical Faults
        and Basalt Flows with Electromagnetic Conductivity Techniques. In: Proc. 2nd Nat. Outdoor
        Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical Methods,
        National Water Well Association, Dublin, OH, pp. 597-615

Ringstad,  C.A. and D.C. Bugenig. 1984. Electrical Resistivity Studies to Delimit Zones of Acceptable
        Ground Water Quality. Ground Water Monitoring Review 4(4):66-69.

Roberts, R. G., W.J. Hinze, and  D.I. Leap. 1989. A Multi-Technique Geophysical Approach to Landfill
        Investigations. In: Proc.  3rd Nat. Outdoor Action Conf. on Aquifer Restoration, Ground Water
        Monitoring and Geophysical Methods, National Water Well  Association, Dublin, OH, pp.  797-811.

Rodrigues, E.B.  1987. Application of Gravity and Seismic Methods in Hydrogeological Mapping at a
        Landfill Site in Ontario.  In:  Proc. 1st Nat. Outdoor Action Conf. on Aquifer Restoration, Ground
        Water Monitoring and Geophysical Methods, National Water Well Association, Dublin, OH, pp.
        487-504.

Rogers, R.B. and W.F. Kean.  1980. Monitoring Groundwater Contamination at a Fly-Ash Disposal Site
        Using  Surface Electrical  Resistivity Methods. Ground Water 18:472-478.

Rudy, R.J. and J.A. Caoile. 1984. Utilization of Shallow Geophysical Sensing  at Two Abandoned
        Municipal/Industrial Waste  Landfills on the Missouri River Floodplain. Ground Water
        Monitoring Review (Fall) pp. 57-65.

Saunders, W.R. and S.A. Cox. 1987. Use of an Electromagnetic Induction Technique in Subsurface
        Hydrocarbon Investigations. In: Proc. 1st Nat. Outdoor Action Conf. on Aquifer Restoration,
        Ground Water Monitoring and Geophysical Methods, National Water Well Association, Dublin,
        OH, pp. 585-600.

Saunders, W.R. and R.M. Germeroth. 1985.  Electromagnetic Measurements for Subsurface Hydrocarbon
        Investigations. In: Proc. NWWA/API Conf. Petroleum Hydrocarbons and Organic Chemicals  in
                                             A-7

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        Ground Water—Prevention, Detection and Restoration, 1985, National Water Well Association,
        Dublin, OH, pp. 310-321.

Stewart, M.T. 1982. Evaluation of Electromagnetic Methods for Rapid Mapping of Salt-Water Interfaces
        in Coastal Aquifers. Ground Water 20:538-545.

Stewart, M. and R. Bretnall. 1986. Interpretation of VLF Resistivity Data for Ground Water
        Contamination Surveys. Ground Water Monitoring Review 6(.l):71-75.

Stollar, R.L.  and P. Roux.  1975. Earth Resistivity Surveys-A  Method for Defining Ground-Water
        Contamination. Ground Water 13:145-150.

Sweeney, J.J. 1984. Comparison of Electrical  Resistivity Methods for Investigation of Ground Water
        Conditions at a Landfill Site. Ground Water Monitoring Review 4(l):52-59.

Walsh, D.C. 1988. Integration of Surface Geophysical Techniques for Landfill Investigation: A Case
        Study. In: Proc. 2nd Nat. Outdoor Action Conf. on Aquifer Restoration, Ground Water
        Monitoring and Geophysical Methods,  National Water Well Association, Dublin, OH, pp. 753-778.

White, R.B. and R.B. Gainer. 1985. Control of Ground Water Contamination at an Active Uranium
        Mill. Ground Water Monitoring Review 5(2):75-82.
                                              A-8

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References for Table A-2

See glossary for meaning of method abbreviations.

Adams, M.L., M.S. Turner, and M.T. Morrow. 1988. The Use of Surface and Downhole Geophysical
        Techniques to Characterize Flow in a Fracture Bedrock Aquifer System. In: Proc. 2nd Nat.
        Outdoor Action Conf. on Aquifer Restoration, Ground Water Monitoring and Geophysical
        Methods, National Water Well Association, Dublin, OH, pp. 825-847.

Crowder, R.E., L. Brouillard, and L. Irons. 1987. Utilizing A Borehole Geophysical Logging Program in
        Poorly Consolidated Sediments for a Hazardous Waste Investigation: A Case History. In: Proc.
        2nd Int.  Symp. on Borehole Geophysics for Minerals, Geotechnical and Groundwater
        Applications, pp. 65-75.

Dearborn, L.L. 1988. Borehole Geophysical Investigations of Fractured Rock at an EPA Superfund Site
        in Massachusetts. In: Proc. 2nd Nat. Outdoor Action Conf. on Aquifer Restoration, Ground
        Water Monitoring and Geophysical Methods, National Water Well Association, Dublin, OH, pp.
        875-895.

Foster, J.B. and D.A. Goolsby. 1972. Construction of Waste-Injection Monitor Wells Near Pensaeola,
        Florida.  Florida Bureau of Geology Information Circular 74.

Ring, G.T. and T.C. Sale. 1987. Evaluation of Well Field  Contamination Using Downhole Geophysical
        Logs and Depth-Specific Samples. In: Superfund  '87, Proceedings of the 8th Annual Conference,
        Hazardous Material  Control Research Institute, Silver Spring, MD, pp. 320-325.

Testa, S.M. 1988. Benefits of Downhole Geophysical Methods in Low Permeability Hydrogeologic
        Environments. In: Proc. 2nd Nat.  Outdoor Action Conf. on Aquifer Restoration, Ground Water
        Monitoring and Geophysical  Methods, National Water Well Association, Dublin, OH, pp. 969-985.

Turner,  W.S.  and J.H. Black. 1989. The Use of Geophysical  Logs in the Characterization of a
        Structurally Complex Site. In: Proc. 3rd Nat. Outdoor Action Conf. on Aquifer Restoration,
        Ground Water Monitoring and Geophysical Methods, National Water Well Association, Dublin,
        OH, pp. 909-919.

Westphalen, O. 1991. The Application of Borehole Geophysics to Identify Fracture Zones and Define
        Geology at Two New England Sites. In: Ground Water Management 7:535-546. (8th NWWA
        Eastern GW Conference). [VOC contamination; caliper, SP, SP resistance, temperature, gamma,
        gamma-gamma, neutron, acoustic  televiewer]

Williams, J.H. and R.W. Conger. 1990. Preliminary Delineation of Contaminated Water-Bearing
        Fractures Intersected by Open-Hole Bedrock Wells. Ground Water Monitoring Review 10(4): 118-
        126. [Gamma, SP resistance, caliper, fluid-resistivity,  temperature, acoustic televiewer, thermal
        flowmeter]
                                              A-9

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                                        APPENDIX B
                           TECHNICAL INFORMATION  SOURCES
       This appendix provides (1) the  names of individuals who may be able to provide  technical
assistance in evaluating  or  selecting  geophysical methods at contaminated sites (Section B.I), (2)
addresses and phone numbers of organizations that publish journals,  symposium proceedings,  and
other geophysics-related  publications  (Section B.2),  and (3) the addresses of major U.S.
Environmental Protection Agency libraries  and information  on holdings.
B. 1  Technical  Assistance

       Technical assistance on  questions concerning use of geophysical methods is available to
EPA personnel from  a number  of EPA laboratories and regional offices:
       Environmental  Systems Monitoring Laboratory,  Las Vegas,  NV (Aldo  Mazzella, FTS  545-
       2254; 702/798-2254) (Lary Jack,  FTS 545-2367; 702/798-2373)
       Region  V, Chicago, IL (Mark  Vendl,  312/886-0405;  Jim Ursic,  312/353-1526)
       The  following individuals with the U.S.  Geological  Survey also may be able to answer
questions  by telephone:

       Gary Olhoeft, Denver,  CO (303/236-1302)
       Peter Haeni, Hartford,  CT (203/240-3060)
                                             B-l

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B.2  Organizations and Journals
        American  Society for Testing  and Materials, 1916  Race  Street, Philadelphia, PA 19103-
        1187 (215/299-5585).

        Canadian Well Logging  Society (CWLS), 640 5th Avenue S. W.,  Suite 229, Calgary,
        Alberta,  T2P  OM6  (403/269-9366). Publisher of CWLS Journal.

        Environmental  and  Engineering  Geophysical  Society  (EEGS,  formerly Society  of
        Engineering and Mineral Exploration  Geophysicists),  P.O.  Box  4475, Englewood,  CO
        80155 (303/771-6101).  Publisher  of  SAGEEP proceedings and  Journal of Applied
        Geophysics (formerly  Geoexploration).

        National  Ground  Water Association  (NGWA—formerly  National  Water  Well
        Association), 6365 Riverside  Drive,  Dublin,  OH, 43017  (800/551-7379).  Publisher of
        Ground  Water  and  Ground Water Monitoring and  Remediation (formerly  Ground Water
        Monitoring Review).

        National  Technical  Information  Semite (NTIS,  U.S.  Department of Commerce,
        Springfield, VA  22161  (800/336-4700).  Copies  of  out-of-print government documents.

        Society of Exploration  Geophysicists  (SEG  Book Order Department), P.O. Box 702740,
        Tulsa, OK 74170-2740  (918/493-3516).  Publisher of  Geophysics.

        Society of Professional  Well Log Analysts  (SPWLA), 6001  Gulf Freeway, Suite  C129,
        Houston,  TX 77023 (713/928-8925).  Publisher of Log Analyst.

        European  Association of Exploration Geophysicists  (Journal  Subscription Department,
        Marston  Book  Services, P.O. Box 87, Oxford  UK).  Publisher of Geophysical
        Prospecting.

        American  Geophysical Union (2000 Florida Avenue,  NW, Washington, DC  20009,
        202/939-3200).  Publisher of Water Resources  Research.

        The Journal of  Hydrology is published  by  Elsevier Science Publishers (Journal
        Department, P.O.  Box  211,  1000  AE Amsterdam,  Netherlands).
B.3  EPA Libraries
       Headquarters Library, PM-211A 401  M  St. SW, Room  2094, Washington  DC  20460;
       (202/382-5921).  25,000 books/documents, 625  journals,  365,000 microfiche documents.

       Region  1  Library/LIB, JFK Federal Building, Boston, MA 02203; (617/565-3300).  22,000
       books/documents, 175  journals,  90,000 microfiche.

                                             B-2

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 Region 2 Library, 26  Federal Plaza, Room 402, New York,  NY 10278; (212/264-2881).
 7,000  books/documents,  50 journals, 155,000  microfiche.

 Region 2 Field Office Library,  MS-245, 2890 Woodbridge Avenue, Building 209, Edison,
 NY 08837; (201/321-6762).  8,000 books/documents, 60 journals,  100,000 microfiche.

 Region 3  Information Resource Center, 3PM52, 841  Chestnut Street, Philadelphia, PA
 19107; (215/597-0580).  24,000  books/documents, 225 journals,  120,000 microfiche.

 Region 4 Library, G6, 345 Courtland Street, NE,  Atlanta, GA 30365-2401;  (404/347-
 4216).  48,000  books/documents, 220 journals, extensive  microfiche  collection.

 Region 5 Library, 230 Dearborn  Street, Room 1670, Chicago, IL 60604; (312/353-2022).
 27,000 books/documents, 325 journals,  110,000  microfiche.

 Region 6 Library, 1445  Ross Avenue,  First Interstate Bank  Tower, Dallas, TX 75202-
 2733;  (214/655-6444). 16,000  books/documents, 76  journals, microfiche.

 Region 7 Library, 726 Minnesota Avenue, Kansas City,  KS  66101; (913/551-7358).  16,000
 books/documents,  110 journals,  150,000 microfiche.

 Region 8 Library, 8PM-IML,  999 18th  Street, Suite  500,  Denver,  CO 80202-2405;
 (303/293-1444). No  listing of holdings.

 Region 9 Library, 75  Hawthorne Street, San  Francisco,  CA  94105; (415/744-1510).  77,000
 books/documents,  250 journals,  >450,000  microfiche.

 Region 10 Library, MD-108,  1200 Sixth Avenue, Seattle,  WA 98101; (206/553-1289).
 23,000 books/documents, 150 journals,  95,000 microfiche.

 Andrew  W.  Breidenbach  Environmental Research Center Library, 26  West  Martin Luther
 King Drive,  Cincinnati,  OH 45268-4545;  (513/569-7707). 19,000  books/documents, 600
journals,  >300,000 microfiche.

 Robert S.  Kerr Environmental Research Laboratory,  P.O.  Box 1198, Kerr  Lab road, Ada,
 OK 74820; (405/332-8800). 4,000 books,  60 journals,  76,000 hardcopy/microfiche
 documents.

 National Enforcement  Investigations  Center  Library, Building 53, Box 25227,  Denver
 Federal Center, Denver,  CO  80225; (303/236-5122). 2,000  books, 100 journals,  numerous
 microfiche.

 Environmental  Monitoring Systems  Laboratory Library, 944  E. Harmon  Avenue,  Las
 Vegas, NV 89119; P.O.  Box  93478, Las Vegas, NV 89193-3478;  702(798-2648).  Extensive
 microfiche  collection.
                                       B-3

                   U.S. GOVERNMENT PRINTING  OFFICE:1994-550-001/00181

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United States
Enrivonmental Protection Agency
Center for Environmental Research Information
Cincinnati, OH 45268

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