PB97-964514
EPA/541/R-97/136
March 1998
EPA Superfund
Record of Decision:
El Toro Marine Corps Air Station,
OU 2A (Site 24-VOC Source Area Vadose Zone)
El Toro, CA
9/29/1997
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DRAFT FINAL
INTERIM RECORD OF DECISION
OPERABLE UNIT 2A
SITE 24 - VOC SOURCE AREA
VADOSE ZONE
MARINE CORPS AIR STATION
EL TORO, CALIFORNIA
SEPTEMBER 1997
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DECLARATION
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Date: 09/24/97
DECLARATION
SITE NAME AND LOCATION
Site 24, Volatile Organic Compound (VOC) Source Area - Operable Unit 2A (OU-2A) -
Vadose Zone
Marine Corps Air Station (MCAS) El Toro
Santa Ana, California 92709
STATEMENT OF BASIS AND PURPOSE
This Interim Record of Decision (ROD) presents the selected remedial action for vadose
zone soil at Site 24 at Marine Corps Air Station (MCAS) El Toro, located in El Toro,
California.
This document was developed in accordance with the Comprehensive Environmental
Response, Compensation, and Liability Act of 1980 (CERCLA) as amended by the
Superfund Amendments and Reauthorization Act of 1986 (SARA), 42 United States
Code Section 9602 et seq., and, to the extent practicable, in accordance with the National
Oil and Hazardous Substances Pollution Contingency Plan (NCP), 40 Code of Federal
Regulations Section 300 et seq. The administrative record index for this site
(Attachment A) identifies the documents upon which the selection of the remedial action
is based. Also, because of the close relationship between OU-2A and OU-1 (the regional
groundwater VOC contamination plume), the administrative record for OU-1 is hereby
incorporated by reference into the administrative record for OU-2A.
The State of California (through the California Environmental Protection Agency
Department of Toxic Substances Control and Santa Ana Regional Water Quality Control
Board) and the United States Environmental Protection Agency (U.S. EPA) concur on the
selected remedy.
ASSESSMENT OF THE SITE
Actual or threatened releases of hazardous substances from this site, if not addressed by
implementing the response action selected in this ROD, may present a current or potential
threat to public health and welfare or to the environment.
DESCRIPTION OF THE REMEDY
Site 24, the VOC Source Area, comprises two contaminated media, soil and groundwater.
This Interim ROD addresses remediation of contamination in the soil at Site 24.
Remediation of groundwater at Site 24 will be addressed in a separate ROD.
The selected remedy for remediation of soil at Site 24 is soil vapor extraction (SVE), the
U.S. EPA presumptive remedy for VOC-contaminated soil. This process uses a vacuum
to pull VOC-contaminated vapors from the soil through SVE wells. Once the vapors are
pulled to the surface, they are passed through an activated carbon filter to remove the
VOCs before the air is discharged to the atmosphere. When the activated carbon filters
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 1
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Date: 09/24/97
Declaration
become saturated with VOCs, the carbon is returned to the manufacturer where it is
regenerated and the VOCs are destroyed. The selected remedy includes the following:
• construction, operation, and maintenance of an SVE system to remove
trichloroethene and other VOCs from the soil,
• performance monitoring throughout the predicted 2 to 4 years of remediation,
• treatment of VOC-contaminated soil gas (vapors) with activated carbon filters
to meet air quality standards prior to discharge to the atmosphere
• confirmatory soil gas sampling at the end of the vadose zone remediation to
confirm that average VOC concentrations are too low to contaminate
groundwater above the maximum contaminant levels, and
• the vadose zone will be resampled at the conclusion of groundwater
remediation. If the average soil gas concentrations are found to be above the
threshold limits, additional vadose zone remediation may be necessary.
SVE addresses the primary risk posed by soil contamination (which can be characterized
as a principal threat at this site) by removing and permanently destroying the
contaminants from soils, thereby significantly reducing the toxicity, mobility, or volume
of hazardous substances in this medium. By removing VOCs from the soil, further
groundwater contamination is minimized or prevented, thereby reducing the time
required for groundwater cleanup. Deed restrictions will be required during remediation
to prevent disturbance of monitoring wells and SVE equipment. These restrictions are
not expected to be necessary once remediation of soils is complete. However, the vadose
zone will be resampled at the conclusion of groundwater remediation. If the average soil
gas concentrations are found to be above the threshold limits, additional vadose zone
remediation may be necessary.
STATUTORY DETERMINATIONS
The selected remedy is protective of human health and the environment, complies with
federal and state requirements that are legally applicable or relevant and appropriate to
the remedial action, and is cost-effective. This remedy utilizes permanent solutions and
alternative treatment (or resource recovery) technologies to the maximum extent
practicable and satisfies the statutory preference for remedies that employ treatment that
reduces toxicity, mobility, or volume as a principal element. Because this remedy will
not result in hazardous substances remaining above health-based levels, the 5-year review
will not apply to this action.
page 2 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Date: 09/24/97
Declaration
Signature: Date:_
Mr. Joseph Joyce
Base Realignment and Closure Environmental Coordinator
Marine Corps Air Station El Toro
Signature: _ Date:
Mr. John E. Scandura, Chief
Southern California Operations
Office of Military Facilities
Department of Toxic Substances Control
Signature: .^^>Xv^^< _ Date:
Daniel D,
Federal Facilities Cleanup Branch
United States Environmental Protection Agency, Region IX
Signature: _ Date:
Mr. Gerard Thibeault
Executive Officer
Regional Water Quality Control Board, Santa Ana Region
OU-2A Draft Final Interim Record of Decision - Site 24. MCAS El Toro page 3
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Date: 09/24/97
Declaration
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Omtm: OW24/V7
Declaration
Signatui
Signature.1
osurc Environmental Coordinator
EIToro
r. John E. Sc«n)Jura. Chief
California Operations
Office of Military Facilities
Department of Toxic Substances Control
Signature:
Date
Daniel 1
Federal Facilities Cleanup Branch
United States Environmental Protection Agency. Region IX
Signature;
Date:
Mr. Gerard Thibeault
Executive Officer
Regional Water Quality Control Board. Santa Ana Region
OU-2A Dratt Final Interim Record of Decfcton - Site 24, MCAS B Tom
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Date: 09/2«/97
Declaration
Signature: ; Date:
Mr. Joseph Joyce
Base Realignment and Closure Environmental Coordinator
Marine Corps Air Station £1 Toro
Signature: Date:
Mr. John E. Scandura, Chief
Southern California Operations
Office of Military Facilities
Department of Toxic Substances Control
Signature: Date:
Mr. Daniel D. Opalski, Chief
Federal Facilities Cleanup Branch
United States Environmental Protection Agency, Region IX
Signature: S^f^LjWffJjjbr . Date:
Mr. Gaxptd Thibeault
Executive Officer
Regional Water Quality Control Board, Santa Ana Region
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 3
10/07/97 TUB 13:34 ITX/RX NO 5419]
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Date: 09/24/97
TABLE OF CONTENTS
Section Page
DECLARATION
DECISION SUMMARY
1 SITE NAME, LOCATION, AND DESCRIPTION
1.1 Site Name 1-1
1.2 Site Location 1-1
1.3 Site Description 1-1
1.4 Geology and Hydrogeology 1-4
1.5 Current Land Use 1-9
1.6 Future Land Use 1-10
2 SITE HISTORY AND ENFORCEMENT ACTIVITIES
3 HIGHLIGHTS OF COMMUNITY PARTICIPATION
3.1 Restoration Advisory Board 3-1
3.2 Fact Sheets 3-1
3.3 Proposed Plan for Site 24 3-2
4 SCOPE AND ROLE OF OPERABLE UNIT,
5 SUMMARY OF SITE CHARACTERISTICS
5.1 Potential Sources of Contamination 5-1
5.1.1 Potential Subsurface Sources 5-1
5.1.2 Potential Surface Sources 5-2
5.2 Types of Contamination and Affected Media 5-2
5.2.1 Vadose Zone Contamination 5-9
5.2.2 Groundwater Contamination 5-9
5.3 Mass of TCE 5-19
5.4 Routes of Exposure 5-19
OU-2A Draft Final Interim Record of Decision - Site 24. MCAS El Toro page i
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TABLE OF CONTENTS (continued)
Section Page
6 SUMMARY OF SITE RISKS
6.1 Contaminant Identification 6-1
6.2 Exposure Assessment 6-1
6.2.1 Residential Scenario 6-1
6.2.2 Industrial Scenario 6-2
6.2.3 Recreational Scenario 6-3
6.2.4 Excavation Worker Scenario 6-3
6.2.5 Exposure Assumptions 6-3
6.2.6 Calculation of Exposure-Point Concentration 6-3
6.3 Toxicity Assessment 6-5
6.4 Risk Characterization 6-5
6.5 Summary of Site Risks 6-6
7 DESCRIPTION OF ALTERNATIVES
7.1 Alternative 1 -No Action 7-1
7.2 Alternative 2 - Soil Vapor Extraction 7-2
7.2.1 Description of the Soil Vapor Extraction 7-3
7.2.2 Results of Pilot Testing , 7-4
7.2.3 Operation of the Soil Vapor Extraction System 7-4
7.2.4 Development of Soil Gas Concentration Threshold
Values 7-14
7.2.5 Monitoring 7-16
7.2.6 Periodic Reviews 7-17
8 SUMMARY OF COMPARATIVE ANALYSIS OF ALTERNATIVES
8.1 Overall Protection of Human Health and the Environment 8-1
8.2 Compliance with Applicable or Relevant and Appropriate Requirements 8-2
8.3 Long-Term Effectiveness and Permanence 8-2
8.4 Reduction of Toxicity, Mobility, or Volume 8-3
8.5 Short-Term Effectiveness 8-3
8.6 Implementability 8-4
8.7 Cost 8-4
page ii OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Date: 09/24/97
TABLE OF CONTENTS (continued)
Section Page
8.8 State Acceptance 8-4
8.9 Community Acceptance 8-4
9 SELECTED REMEDY
10 STATUTORY DETERMINATIONS
10.1 Protection of Human Health and the Environment 10-1
10.2 Compliance with ARARs 10-1
10.2.1 Chemical-Specific ARARs 10-2
10.2.1.1 ARARs for Vadose Zone Remediation 10-2
10.2.1.2 Characterization of Wastes 10-10
10.2.2 Location-Specific ARARs 10-10
10.2.3 Action-Specific ARARs 10-11
10.2.3.1 Federal 10-11
10.2.3.2 State 10-13
10.3 Cost-Effectiveness 10-14
10.4 Utilization of Permanent Solutions and Alternative Treatment Technologies
(or Resource Recovery Technologies) to the Maximum Extent Practicable... 10-14
10.5 Preference for Treatment as a Principal Element 10-15
11 DOCUMENTATION OF SIGNIFICANT CHANGES
12 REFERENCES
SUMMARY OF STATE ARARS RECEIVED IN RESPONSE TO
DTSC ARARS SOLICITATION
RESPONSIVENESS SUMMARY
ATTACHMENTS
A ADMINISTRATIVE RECORD FOR SITE 24
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page i
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Date: 09/24/97
TABLE OF CONTENTS (continued)
FIGURES
Figure Page
1-1 MCAS El Toro Location Map 1-2
1-2 Aerial Photograph of Site 24 (1980) 1-3
1-3 Geologic Cross Sections A-A' and B-B' 1-5
1-4 Geologic Cross Sections C-C' and D-D' 1-7
5-1 TCE Concentrations in the Shallow and Principal Aquifers 5-7
5-2 Cross Sections A-A' and B-B' Analytical Results for TCE 5-11
5-3 Cross Sections C-C' and D-D' Analytical Results for TCE 5-13
5-4 TCE in the Shallow Groundwater Unit and Soil Gas Near the Water Table 5-15
5-5 TCE Concentrations in Groundwater Shallow Aquifer 5-17
5-6 Off-Site Extent of TCE Concentrations in Principal Aquifer 5-21
7-1 Soil Vapor Extraction Process Flow Diagram 7-5
7-2 Soil Vapor Extraction Well Locations Shallow Soil Gas Horizon
(10 - 40 Feet Deep) 7-7
*-•
7-3 Soil Vapor Extraction Well Locations Intermediate Soil Gas Horizon
(40 - 70 Feet Deep) 7-9
7-4 Soil Vapor Extraction Well Locations Shallow Soil Gas Horizon
(70 - 100 Feet Deep) 7-11
page iv OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Date: 09/24/97
TABLE OF CONTENTS (continued)
TABLES
Table
2-1 Summary of Environmental Investigations Relevant to Site 24 2-5
3-1 Summary of MCAS El Toro Fact Sheets 3-2
5-1 Two Categories of Potential Sources of VOC Contamination at Site 24 5-1
5-2 Potential Subsurface Sources of VOC Contamination at Site 24 5-3
5-3 Potential Surface Sources of VOC Contamination at Site 24 5-5
6-1 Chemicals of Potential Concern in Soil and Groundwater 6-2
6-2 Values Assigned to Dose Equation Parameters 6-4
6-3 Cancer Slope Factors and Reference Doses for Chemicals of Potential Concern
in Soil and Groundwater at Site 24 6-7
6-4 Summary of Human Health Risk Results 6-9
7-1 Conceptual Design of SVE Wells 7-13
7-2 Existing SVE Well Characteristics 7-13
7-3 Mixing-Zone Calculations 7-16
7-4 Vadose Zone Concentration Threshold Calculations 7-17
9-1 Alternative 2 Cost Estimate Summary 9-2
10-1 Chemical-Specific Applicable or Relevant and Appropriate Requirements for
Selected Remedy '. 10-3
10-2 Location-Specific ARARs for Selected Remedy 10-5
10-3 Action-Specific ARARs for Selected Remedy 10-6
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page v
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Date: 09/24/97
ACRONYMS/ABBREVIATIONS
AOC
ARAR
BACT
BCT
bgs
BNI
BRAC
BTEX
CAA
Cal-EPA
CAS
CCR
CERCLA
CFR
cm/s
COPC
CPT
CSF
DCE
DOD
DQO
DON
DTSC
DURA
FFA
FS
ft3/min
H&SC
H&SP
HHRA
HI
HQ
IAS
IRP
area of concern
Applicable or Relevant and Appropriate Requirement
best available control technology
Base Realignment and Closure Cleanup Team
below ground surface
Bechtel National, Inc.
Base Realignment and Closure
benzene, toluene, ethylbenzene, and xylenes
Clean Air Act
California Environmental Protection Agency
Chemical Abstract Service
California Code of Regulations
Comprehensive Environmental Response, Compensation, and Liability
Act of 1980
Code of Federal Regulations
centimeters per second
chemical of potential concern
cone penetrometer test
cancer slope factor
dichloroethene
United States Department of Defense
data quality objective
United States Department of the Navy
Department of Toxic Substances Control
Data Usability in Risk Assessment
Federal Facilities Agreement
Feasibility Study
cubic feet per minute
Health and Safety Code
Health and Safety Plan
Human Health Risk Assessment
hazard index
hazard quotient
Initial Assessment Study
Installation Restoration Program
page vi
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Date: 09/24/97
ACRONYMS/ABBREVIATIONS (continued)
MCAS
MCL
MCLG
MICR
MSL
NACIP
NCP
NPDES
NPL
O&M
OCEMA
OU
PCB
PCE
POC
QA/QC
RAB
RACER
RAGS
RCRA
RFA
RfD
RI
RI/FS
RME
ROD
ROG
RWQCB
SARA
SCAQMD
SDWA
SIP
SIPOA
Marine Corps Air Station
maximum contaminant level
maximum contaminant level goal
micrograms per kilogram
micrograms per liter
maximum individual cancer risk
mean sea level
Navy Assessment and Control of Installation Pollutants
National Oil and Hazardous Substances Pollution Contingency Plan
National Pollutant Discharge and Elimination System
National Priorities List
operation and maintenance
Orange County Environmental Management Agency
Operable Unit
polychlorinated biphenyl
tetrachloroethene
point of compliance
quality assurance/quality control
Restoration Advisory Board
Remedial Action Cost Engineering Requirements
U.S. EPA Risk Assessment Guidance for Superfund
Resource Conservation and Recovery Act
RCRA Facilities Assessment
reference dose
Remedial Investigation
Remedial Investigation/Feasibility Study
reasonable maximum exposure
Record of Decision
reactive organic gas
(California) Regional Water Quality Control Board
Superfund Amendments and Reauthorization Act of 1986
South Coast Air Quality Management District
Safe Drinking Water Act
State Implementation Plan
Site Inspection Plan of Action
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Date: 09/24/97
ACRONYMS/ABBREVIATIONS (continued)
SVE
svoc
SWDIV
SWMU
SWRCB
TBC
TCE
IDS
UCL
use
U.S. EPA
USGS
UST
VGAC
VOC
Soil Vapor Extraction
semivolatile organic compound
Southwest Division Naval Facilities Engineering Command
solid waste management unit
(California) State Water Resources Control Board
to be considered
trichloroethene
total dissolved solids
upper confidence limit
United States Code
United States Environmental Protection Agency
United States Geological Survey
underground storage tank
vapor-phase granular activated carbon
volatile organic compound
pageviii
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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DECISION SUMMARY
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Date: 09/24/97
Section 1
SITE NAME, LOCATION, AND DESCRIPTION
1.1 SITE NAME
The portion of Operable Unit 2A (OU-2A) addressed in this decision document consists
of contaminated soil at the Volatile Organic Compound (VOC) Source Area, also known
as Installation Restoration Program (IRP) Site 24, at Marine Corps Air Station (MCAS)
El Toro.
1.2 SITE LOCATION
MCAS El Toro lies in a semiurban agricultural area in southern California, approximately
8 miles southeast of the city of Santa Ana and 12 miles northeast of the city of Laguna
Beach (Figure 1-1). Land northwest of the Station is used for agricultural purposes. The
land to the south and northeast is used mainly for commercial, light industrial, and
residential purposes. Site 24 is located in the southwest quadrant of MCAS El Toro.
1.3 SITE DESCRIPTION
Site 24 encompasses approximately 200 acres. The site slopes to the west from an
elevation of about 320 feet above mean sea level (MSL) at the intersection of the east-
west and north-south runways to approximately 240 feet above MSL near the end of the
east-west runway. The site is largely industrialized and contains two large aircraft
hangars (Buildings 296 and 297) and several smaller buildings that are used for aircraft
and vehicle maintenance and repair (Figure 1-2). Maintenance activities (e.g.,
degreasing) that occurred within these buildings may have contributed to the VOC
contamination present at the site.
The Site 24 surface cover consists of unpaved open ground, asphalt, and concrete. The
majority of the site (170 acres) is paved. Asphalt-covered areas are used primarily for
access roads and parking lots for military and personal vehicles. Asphalt ranges from
approximately 2 to 4 inches thick and varies in condition stationwide. Concrete-covered
areas historically had the highest frequency of industrial activities at Site 24. Concrete
blankets most of the industrialized portions of the site, Buildings 296 and 297 (the two
aircraft hangars), Building 295 (the helicopter hangar), and Building 324 (an access apron
to the former engine test facility). Concrete thickness ranges from approximately
6 inches to 14 inches, based on recent drilling operations.
A network of storm drains discharges rainwater and any other fluids that accumulate on
the paved surfaces of Site 24. The majority of the wastewater that feeds the storm sewer
network is generated from the concrete-paved areas of Site 24 where most of the
industrial activity takes place. The storm drain network for the industrial facilities of
Site 24 discharges to Agua Chinon and Bee Canyon Washes near the Station boundary.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 1-1
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CALIFORNIA
SJLOS ANGELES
MCAS
EL TORO
t——~ ~~ 0 100
SAN DIEGO "i in
APPROXIMATE SCALE
(MILESI
MCAS
L TORO
APPROXIMATE
(MILES!
SCALE
ircFxo
_ __ APPROXIMATE BOUNDARY BETWEEN UNINCORPORATED
^^ AREAS OF ORANGE COUNTY AND VARIOUS CUES
UCAS a TORO BOUNDARY
SECTION OF RVINE WTTNM BASE BOUNDARY
ORANGE COUNTY - UNINCORPORATED ORANGE COUNTY
FOOTHLL RANCH
ORANGE COUNTY
ORANGE
COUNTY
LAKE FOREST
/ MISSION VEJO
Record of Decision
Figure 1-1
MCAS El Toro Location Map
ORANGE COUNTY
I AU»0
MCAS, El Toro. California
LAQUNA
BEACH
Bechtel National, Inc.
File No: 135R2375
Job No: 22214-135
CLEAN II Program
page 1-2
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CO
(0
SITE 24 BOUNDARY
Figure 1-2
Aerial Photograph of Site 24 (1980)
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Date: 09/24/97
Section 1 Site Name, Location, and Description
1.4 GEOLOGY AND HYDROGEOLOGY
An analysis of soil boring logs at Site 24 infers that three units of alluvial fan deposition
are present. Coarse-grained stream channel deposits (sands and gravels) are interbedded
with intermediate-grained (silty sand and clayey sand) and fine-grained overbank deposits
(silts and clays), which were investigated to approximately 260 feet below ground surface
(bgs). Figures 1-3 and 1-4 are geologic cross sections that illustrate the stratigraphy
beneath Site 24. These units were found to be somewhat continuous and laterally
extensive on a large scale, yet highly heterogeneous on a small scale due to the
interbedded nature of sediments deposited in the alluvial setting.
Groundwater is first encountered approximately 85 to 120 feet beneath Site 24. This first
water-bearing unit, or shallow groundwater unit, appears to be laterally continuous across
the site. The total thickness of the unit appears to be greater than 100 feet based on
boring logs from the Site 24 Remedial Investigation (RI). The upper 40 to 50 feet is
relatively sandy with some fine-grained interbeds. The lower portion (the bottom 50 to
120 feet) of the unit, while still containing massive sandy units, becomes increasingly
interbedded with finer-grained sediments.
An intermediate zone separates the shallow groundwater unit from a deeper, principal
aquifer. The intermediate zone beneath MCAS El Toro consists of finer grained alluvial
sediments that are estimated to be approximately 90 feet thick (JEG 1994a). At Site 24,
:paration of the shallow groundwater unit from the principal aquifer is supported by
uthologic, geochemical, and cone penetrometer test (CPT) data. Geotechnical analytical
results from the shallow groundwater unit, intermediate zone, and principal water-bearing
zone indicate vertical hydraulic conductivities for the intermediate zone that are several
orders of magnitude lower than the two water-bearing zones (BNI 1997a).
The principal aquifer comprises the early Pleistocene San Pedro Formation and is the
main water-production zone for the Irvine area. In general, deep-screened wells located
near pumping centers in the main portion of the Irvine groundwater subbasin (Irvine
Subbasin) indicate seasonal fluctuations in piezometric pressure more than shallow-
screened intervals in the same wells (JEG 1994a). Water-level data from multiport
monitoring and cluster wells in the Irvine Subbasin support hydraulic separation between
the shallow groundwater unit and the deeper, principal aquifer. Although small vertical
hydraulic head differences are shown to exist between shallow and deeper water-bearing
intervals on Site 24, Phase II RI analytical data do not indicate downward migration of
VOCs from the shallow groundwater unit to the principal aquifer on Site 24. However,
the off-Station trichloroethene (TCE) contamination of the principal aquifer is
verification that some migration has occurred. Migration could be enhanced by vertical
gradients developed by agricultural well pumping.
Site 24 is located within the Irvine Subbasin, which has been designated by the California
Regional Water Quality Control Board (RWQCB), Santa Ana Region, as a public water
supply source (RWQCB 1995). The regional aquifer beneath Site 24 is not currently a
page 1-4 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Section 1 Site Name, Location, and Description
source of municipal drinking water; however, groundwater in the vicinity of the Station is
used for agricultural purposes. One on-Station groundwater well that belongs to the
Irvine Company, located at the westernmost end of the east-west runway, is used for
irrigation and is connected to the regional irrigation distribution system. The other
irrigation wells are located west (three wells) and northwest (four wells) of the station.
1.5 CURRENT LAND USE
MCAS El Toro is bordered on the south and west by the city of Irvine and on the north
and east by unincorporated lands. The city of Irvine controls development in surrounding
areas that are suitable for urbanization. However, local jurisdictions do not have
authority over federal lands.
MCAS El Toro encompasses about 4,738 acres. Approximately 1,000 acres are
designated for outleases that are not available for development because airfield safety
clearances render them unsuitable for any other use. The outleased lands are at the
corners of the Station and are used for agricultural purposes, including landscape
nurseries, livestock grazing, and crop production.
Land use on MCAS El Toro consists of a few general types. General Station land uses
are described in the following four quadrants, as defined by the bisecting north-south and
east-west runways.
• The northwest quadrant consists of administrative services (including the
MCAS El Toro headquarters, family and bachelor housing, and community
support services).
• The northeast quadrant consists of Marine Aircraft Group activities (including
training, maintenance, supply and storage, and airfield operations), family
housing, community services, and ordnance storage in areas isolated by
topographic relief and distance from other developments.
• The southeast quadrant consists of administrative services, maintenance
facilities, ordnance storage, and the golf course.
• The southwest quadrant (Site 24) consists of aircraft maintenance facilities,
supply and storage facilities, and limited administrative services.
Historically, land use around MCAS El Toro has been largely agricultural. However, the
land to the south, southeast, and southwest has been developed over the past 10 to
15 years for commercial, light industrial, and residential uses. Currently, expanding
commercial areas are located adjacent to the Station. Additional residential areas are
located to the northwest and west of the Station. Adjacent land to the northeast and
northwest is used for agriculture.
Growth projections through the year 2000 for the area surrounding the Station indicate
continued urbanization. The estimated population in the city of Irvine in 1990 was
105,311. Population projections indicate further increases to 118,570 by the year 2000
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 1-9
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Section 1 Site Name. Location, and Description
and 208,220 by the year 2020. Population growth has occurred primarily in the central
residential districts within 2 to 3 miles of the station.
1.6 FUTURE LAND USE
MCAS El Toro is scheduled for closure in 1999. A Community Reuse Plan has been
prepared (MCAS Local Redevelopment Authority 1996). The primary alternative for
future development of the area that contains Site 24 is airport support.
page 1-10 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Section 1 Site Name, Location, and Description
El Toro Marine Corps Air Station, El Toro, California
Please contact Region 9 for copy of the following figures:
Figure 1-3 - (Geologic Cross Sections A-A' and B-B')
Figure 1-4 - (Geologic Cross Sections C-C' and D-D')
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Date: 09/24/97
Section 2
SITE HISTORY AND ENFORCEMENT ACTIVITIES
MCAS El Toro was commissioned in 1943 as a Marine Corps pilot fleet operation training
facility. In 1950, the Station was selected for development as a master jet station and permanent
center for Marine Corps aviation on the west coast. The Station mission has involved the
operation and maintenance of military aircraft and ground-support equipment. Much of the
industrial activity supporting this mission took place in the southwestern quadrant of the Station,
where Site 24 is located.
Past operations and practices at MCAS El Toro have contributed to soil and groundwater VOC
contamination. Industrial activities at Site 24, such as dust suppression with waste liquids, paint
stripping, degreasing, vehicle and aircraft washing, and waste disposal practices may have
involved the use of solvents containing VOCs such as TCE and tetrachloroethene (PCE). Wastes
from these practices may have reached the surface or subsurface through leakage, runoff, storm
drains, or direct application to the soil. These wastes are believed to be the source of VOCs
detected in the regional groundwater. The precise origin, nature, and use of TCE released at the
site and the specific circumstances and quantities of individual releases are not documented.
TCE usage at MCAS El Toro is believed to have been discontinued in the mid-1970s.
Environmental remediation activities at MCAS El Toro are performed under the IRP. The IRP
was developed in 1980 by the United States Department of Defense (DoD) to comply with
federal guidelines to manage and control past hazardous waste disposal actions (DON 1992). The
first indication of contamination at the Station occurred during routine water quality monitoring
in 1985, when the Orange County Water District discovered TCE in groundwater at an irrigation
well located approximately 3,000 feet downgradient of MCAS El Toro.
In 1985, the United States Department of the Navy (DON) began to work on an Initial
Assessment Study (IAS) to locate potentially contaminated sites on the Station. This work was
conducted for the Naval Facilities Engineering Command under the Navy Assessment and
Control of Installation Pollutants (NACIP) Program, which was the DON version of the DoD
IRP at that time. The I AS report identified 17 sites as potential sources of contamination (Brown
and Caldwell 1986). The identification of potentially contaminated sites was based on the results
of record searches and employee interviews. The report recommended sampling locations and
sample analytical parameters to confirm the suspected contamination at the sites.
In 1987, the Marine Corps contracted for a review of the IAS to produce a Site Inspection Plan of
Action (SIPOA) (JMM 1988). In July 1987, while the SIPOA study was under way, RWQCB
Santa Ana Region issued a cleanup and abatement order to the Marine Corps. This order
required the Station to initiate a perimeter groundwater VOC investigation and submit a draft
report. The SIPOA released in August 1988 included a recommendation of 19 sites for study and
amended the site sampling plans proposed in the IAS report. This SIPOA report served as the
basis for the Sampling and Analysis Plan for the remedial investigation/feasibility study (RI/FS)
sites.
In June 1988, the U.S. EPA recommended adding MCAS El Toro to the National Priorities List
(NPL) of the Superfund Program due to VOC contamination at the station boundary and in the
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Section 2 Site History and Enforcement Activities
agricultural wells west of the Station. MCAS El Toro was added to the NPL on 15 February
1990. In October 1990, the Marine Corps/DON signed a Federal Facilities Agreement (FFA)
with U.S. EPA Region IX, California Department of Health Services (now referred to as the
California Environmental Protection Agency [Cal-EPA] Department of Toxic Substances
Control [DISC]), and the RWQCB Santa Ana Region (FFA 1990). The FFA is a cooperative
agreement that:
• assures environmental impacts are investigated and appropriate response actions are
taken to protect human health and the environment;
• establishes a procedural framework and schedule for developing, implementing, and
monitoring appropriate response actions;
• facilitates cooperation, exchange of information, and participation of the parties; and
• assures adequate assessment, prompt notification, and coordination between federal
and state agencies.
The implementation of the FFA is included as one of the responsibilities of the Base
Realignment and Closure (BRAC) Cleanup Team (BCT). The BCT consists of representatives
from the DON Southwest Division Naval Facilities Engineering Command (SWDIV), U.S. EPA,
DTSC, and RWQCB Santa Ana Region. The team was established to manage and coordinate
environmental restoration and compliance programs related to the closure and disposal of MCAS
El Toro by July 1999 (BNI 1997a). In addition, the MCAS El Toro BCT has specified in its
mission and vision statements that:
• fast-track remediation of sites is necessary to expedite reuse; and
• restoration and reuse is to be maximized by 1999.
In December 1989, the DON began to prepare a Phase I RI Work Plan and associated documents
for MCAS El Toro. The DON reviewed the available reports and other documents pertinent to
past disposal practices at the Station and concluded that 22 sites would be investigated (JEG
I993a). These sites were grouped into three OUs. OU-1 comprised the regional VOC
groundwater investigation (Site 18), which was conducted both on and off the Station. OU-2
included the four landfill sites (Sites 2, 3, 5, and 17) and Site 10, the petroleum disposal area
(this site was later moved to OU-3). The remaining 16 sites were grouped together as OU-3.
These sites were considered to be potential sources for a variety of contaminants. The principal
objectives of the Phase I RI were to evaluate the source(s) of contamination in regional
groundwater west of the Station and determine whether contamination exists and is affecting the
environment at sites in OU-2 and OU-3.
The results of the Phase I RI were documented in a draft Technical Memorandum issued in July
1993 (JEG 1993a), a draft RI report for OU-1 issued in July 1994 (JEG 1994a), and in a draft
Soil Gas Technical Memorandum issued in October 1994 (JEG 1994b). A variety of
contaminants in the groundwater, soil, surface water, and sediment at MCAS El Toro was
identified during the Phase I RI. Contaminants in the soil and sediment consisted primarily of
low concentrations of semivolatile organic compounds (SVOCs), petroleum hydrocarbons,
page 2-2 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Section 2 Site History and Enforcement Activities
pesticides, herbicides, and polychlorinated biphenyls (PCBs) (JEG 1993a). It was also
concluded during the Phase I RI that the source of contamination for regional groundwater is in
the southwest quadrant of the Station, but no specific source was identified. The sampling events
yielded sufficient information to warrant conducting a preliminary risk assessment of
contaminants at the sites for both groundwater and soil contamination. The results of the Phase I
RI provided the primary data for the Phase II RI/FS.
In March 1993, MCAS El Toro was placed on the BRAC III list of military facilities considered
for closure. Under the terms of the FFA, Station closure would not affect the DON's obligation
to conduct the RI/FS and to comply with the other requirements of the FFA (FFA 1990,
Section 37, Base Closure).
Concurrent with the Phase I RI, the DON conducted a Resource Conservation and Recovery Act
(RCRA) Facilities Assessment (RFA) at MCAS El Toro. The purpose of the RFA was to
evaluate whether an additional 140 sites at MCAS El Toro would require further investigation
under the Phase II RI/FS program. The final RFA report was submitted in July 1993 (JEG
1993b). Based on an evaluation of the sampling visit results, 25 solid waste management units
(S WMUs)/areas of concern (AOCs) were recommended for further action. Site 23 (Wastewater
Treatment Plant Sewer Lines) was evaluated in the RFA and recommended for no further action.
The sewer lines are located within Site 24 which was added to the Phase II RI scope.
Interviews with active and retired personnel from the Fuel Operations Division and Facility
Management Department (currently the Installations Department) were held in July 1994 at
MCAS El Toro (JEG 1994c). The objectives of the meeting were to supplement and confirm
information obtained from past interviews and field investigations, to obtain a better
understanding of current and historical operations at MCAS El Toro, and to identify new areas of
potential environmental concern at MCAS El Toro. Those interviewed had knowledge of
operations and procedures for storage and disposal of hazardous materials and waste. The
interview panel consisted of regulatory agency personnel, DON and MCAS El Toro personnel,
and contractor personnel.
The subjects covered during the interviews included underground storage tanks (USTs),
aboveground storage tanks, RI/FS investigation sites, tank farms, disposal procedures, disposal
areas, and accidental or unintentional spills or leaks that may have occurred. Much of the
information gathered from previous interviews and field investigations was confirmed. The
interview panel discussed the types of wastes known to be deposited in each of the landfills, the
depth and the boundaries of the landfills, and how the wastes were handled. Other subjects
discussed included the types of operations that occurred on the Station and the types of chemicals
used in these operations.
In July 1995, a final Work Plan for the Phase II RI/FS was issued (BNI 1995). This Work Plan
presented an approach to conduct the Phase II RI at 24 sites including two new sites, Site 24 and
Site 25. The objectives of the plan were to present a statistically based sampling strategy to
numerically establish confidence that inferences made from the data are correct, establish
background concentrations of metals in soils and groundwater, and, ultimately, collect sufficient
OU-2A Draft Final Interim Record of Decision - Site 24. MCAS El Toro page 2-3
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Date: 09/24/97
Section 2 Site History and Enforcement Activities
information to support risk management decision. The Phase II RI was conducted in 1995 and
1996.
Table 2-1 summarizes the enforcement activities and environmental investigations that have
occurred at MCAS El Toro.
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Section 2 Site History and Enforcement Activities
Table 2-1
Summary of Environmental Investigations Relevant to Site 24
Date
Investigation
Objective
Summary of Findings
1985
IAS*
1986
1988
1988
1989
1989
1990
OCWDC Groundwater
Investigation
Site Inspection Plan of
Action
Perimeter Study
Investigation
Interim pump-and-treat
system
Phase I RIh Work Plan
and associated
documents for MCAS
ElToro
Superftind NPLj
Locate potentially
contaminated sites at
MCASb El Toro using
record searches and
employee interviews.
Investigate source of TCEd
found in agricultural well
west of MCAS El Toro.
Review IAS findings.
Address the RWQCBf,
Santa Ana Region Cleanup
and Abatement Order
requiring investigation of
the source of regional VOC
groundwater contamination.
Pump and treat VOC-
contaminated groundwater
from three extraction wells
near the Station boundary.
Formulate Work Plan, Field
Sampling Plan, and other
RI documents to direct the
Phase I fieldwork.
Identify sites with imminent
risks to the public.
Identified 17 sites as potential sources of
contamination. Recommended sampling
locations and sample analytical
parameters to confirm the suspected
contamination at the 17 sites.
After installing a series of monitoring
wells and soil vapor probes and
reviewing independent investigations,
OCWD concluded that MCAS El Toro
was the source of TCE contamination
detected in groundwater downgradient
of the Station.
Recommended 19 sites for investigation
and amended the site sampling plans
proposed in the IAS report. This
included one site (Site 18) intended to
address the off-Station contaminant
plume of VOCse.
Detected the presence of VOCs in
shallow groundwater near the
southwestern boundary of the Station.
Groundwater was extracted at a
combined rate of 30 gallons per minute
from three wells and treated with
granular activated carbon. Extracted
groundwater had concentrations of TCE
and PCE8 from 10 to 160 and 25 to
100 parts per billion, respectively.
DON concluded that 22 sites would be
investigated and grouped into three
Oils'.
MCAS El Toro was added to the NPL
for the Superfund Program due to VOC
contamination at the Station boundary
and in agricultural wells west of the
Station boundary.
(table continues)
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Date: 09/24/97
Section 2 Site History and Enforcement Activities
Table 2-1 (continued)
Date
Investigation
Objective
Summary of Findings
1993
Base Closure and
Realignment Act
1993
Phase I RI
1993
RCRA" Facility
Assessment
1994
Phase I Soil Gas
Survey for Sites 24 and
25
Identify sites for closure.
The draft Technical
Memorandum and draft
OU-1 RI Reports document
the results of the Phase I RI.
The principal objectives of
the Phase I RI were to make
an initial determination
regarding the existence and
risks of contamination at
sites in OU-1, OU-2, and
OU-3. Sites 24 and 25
were added during the
Phase I RI.
Evaluate whether an
additional 140 sites at
MCAS El Toro would
require further investigation
under the Phase II RI/FS
program.
Identify potential VOC
sources at Sites 24 and 25.
MCAS El Toro was placed on the
BRACk III list. Under the terms of the
FFA1, Station closure would not affect
the DON's obligation to conduct the
RI/FS™ and comply with the other
requirements of the FFA.
Various contaminants in the
groundwater, soil, surface water, and
sediment were detected at MCAS El
Toro. Soil and sediment contaminants
were primarily SVOCs", petroleum
hydrocarbons, pesticides, herbicides,
and PCBs0. The Phase I RI concluded
that the source of contamination for
regional groundwater was the southwest
quadrant of the Station, but it did not
indicate specific sources. A preliminary
risk assessment was conducted for
contaminants at the sites in both
groundwater and soil.
Based on the RCRA Facility Assessment
results, SWMUs/AOCsq were
recommended for further action. This
action included additional subsurface
investigation or other activities such as
inspection of underground storage tanks,
repair of cracks in concrete-paved areas,
and excavation of contaminated soil. Of
these 25 SWMUs/AOCs, 2 were
recommended for further action under
the Phase II RI/FS program. Site 23 was
investigated and recommended for no
further action.
The soil gas survey investigated soil
conditions (generally 12 to 20 feet
below ground surface). Elevated
concentrations of VOCs were detected
beneath the aircraft maintenance hangars
(Buildings 296 and 297). TCE was the
compound most frequently detected.
Other VOCs detected included PCE,
1,1-dichloroethene, Freon 113, carbon
tetrachloride, and chloroform.
(table continues)
page 2-6
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Section 2 Site History and Enforcement Activities
Table 2-1 (continued)
Date
Investigation
Objective
Summary of Findings
1994
1995
1996
1996
1996
Interviews with active
and retired personnel
Final Work Plan for
Phase II RI/FS and
associated documents
Interim-Action FS for
groundwater
contamination
designated as OU-1
RI for Site 24 vadose
zoneVOC
contamination
FS for vadose zone
contamination at
Site 24
To supplement and confirm
information from past
investigations and
interviews, obtain a better
understanding of current
and historical operations,
and identify new areas of
potential environmental
concern.
Present an approach to
conduct the Phase II RI at
24 sites at MCAS El Toro
using the U.S. EPA DQOr
process. Establish
background concentrations
of metals in soils. Establish
a process to collect
sufficient information to
support decisions on risk
management.
Evaluate potential actions
to reduce the impact of the
VOC-contaminated
groundwater on the OCWD
Desalter Project.
Determine the nature and
extent of contamination in
the vadose zone at Site 24
and evaluate the human-
health risk due to this
contamination.
Evaluate potential actions
to remediate the VOC-
contaminated soils at
Site 24.
The interview panel provided
information about types of operations
that occurred on-Station and types of
chemicals used in these operations.
Established DQO process for conducting
Rl/FS. Two new sites, Sites 24 and 25,
were established for investigation in
Phase II.
A range of remedial alternatives has
been prepared and presented for public
comment. A decision is expected by the
end of 1997.
Soil and groundwater were investigated.
The RI linked the groundwater hot spot
identified during the Phase II RI with
high concentrations of TCE in the
vadose zone beneath Buildings 296 and
297.
SVE* is presented as the presumptive
remedy most appropriate for
remediation of contaminated soils.
Notes:
" IAS - Initial Assessment Study
b MCAS - Marine Corps Air Station
c OCWD - Orange County Water District
" TCE - trichloroethene
* VOC - volatile organic compound
' RWQCB - Regional Water Quality Control Board
8 PCE - tetrachloroethene
(table continues)
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Section 2 Site History and Enforcement Activities
Table 2-1 (continued)
h Rl - Remedial Investigation
' OU - operable unit
' NPL - National Priorities List
k BRAG - Base Realignment and Closure
' FFA - Federal Facilities Agreement
m FS - Feasibility Study
n 5VOC - semivolatile organic compound
0 PCB - polychlorinated biphenyl
p RCRA - Resource Conservation and Recovery Act
q SWMU/AOC - solid waste management unit/area of concern
' U.S. EPA DQO - United States Environmental Protection Agency data quality objectives
* SVE - soil vapor extraction
page 2-8 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Date: 09/24/97
Section 3
HIGHLIGHTS OF COMMUNITY PARTICIPATION
There are a total of 24 sites that are being investigated at MCAS El Toro. A Community
Relations Plan (BNI 1996a) was developed to document concerns identified during community
interviews and provide a detailed description of the community relations activities planned in
response to information received from the community. The initial plan was prepared in 1991 and
revised in 1993 and 1996. The revisions incorporated the most recent assessment of community
issues, concerns, and information needs related to the ongoing environmental investigation and
remediation program at MCAS El Toro.
The community relations program includes specific activities for obtaining community input and
keeping the community informed. These activities include conducting interviews, holding public
meetings, issuing fact sheets to provide updates on current remediation activities, maintaining an
information repository where the public can access technical documents and program
information, disseminating information to the local and regional media, and making
presentations to local groups.
Outside the community relations program, community members and local governmental agencies
have participated in planning for the reuse of MCAS El Toro through development of the
Community Reuse Plan.
3.1 RESTORATION ADVISORY BOARD
In 1994, individuals from local communities began to play an increasingly significant
role in the environmental restoration process with the establishment of the Restoration
Advisory Board (RAB). Original membership in the board, which was solicited by the
Marine Corps/Navy through paid newspaper notices, exceeded 50 business and
homeowners' representatives, locally elected officials and local regulatory agencies, and
interested residents. RAB meetings occur approximately every 2 months, are open to the
public and include Marine Corps/Navy and regulatory representatives. Several board
members from the RAB have taken information from the regular meetings back to the
groups they represent, thus contributing to an increased awareness of the installation
restoration process. In addition, members of the public can contact RAB members to
obtain information or express concerns to be discussed at subsequent RAB meetings. A
copy of the RAB meeting minutes is available at the MCAS El Toro Information
Repository, located at the Heritage Park Regional Library in Irvine, California. RAB
meeting minutes are also located on the DON's SWDIV Environmental Web Page, which
can be found at either of the following two Internet addresses:
http://ivory, nose. mil/-saundel/default. html
http://www. efdswest. navfac. navy. mil/DEP/ENV/default. html
3.2 FACT SHEETS
Facts sheets have been used to ensure an even broader dissemination of information
within the local community. The first fact sheet announcing the IRP process at MCAS
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Section 3 Highlights of Community Participation
El Toro was delivered to residents surrounding MCAS El Toro and mailed to city, state,
and federal officials, agencies, local groups, and individuals identified in the Community
Relations Plan in November, 1991. Subsequent fact sheets were mailed to the
community as significant remediation milestones occurred (Table 3-1). These fact sheets
have included information concerning the status of site investigations, the upcoming
remedy selection process, ways the public can participate in the investigation and
remediation of MCAS El Toro, and the availability of the Administrative Record. The
fact sheets are mailed to approximately 1,800 households, businesses, public officials,
and agencies in an effort to reach as many community members as possible.
Table 3-1
Summary of MCAS' El Toro Fact Sheets
Fact Sheet Number
-
-
1
2
3
4
5
6
7
Date
11/91
12/92
12/93
12/93
07/95
10/95
11/95
04/96
12/96
Summary of Contents
Information Update/IRPb Process
Information Update
Phase II RT Results
RABd Formation
Information Update/Tank 398
Information Update/Engineering Evaluation/Cost Analysis
MCAS El Toro Building 673-T3 Certification for Closure
Looking Back-Moving Forward Update on IRP Progress
Groundwater Remediation OU'-l and OU-2A
Notes:
* MCAS - Marine Corps Air Station
" IRP - Installation Restoration Program
c Rl - Remedial Investigation
d RAB - Restoration Advisory Board
* OU - operable unit
3.3 PROPOSED PLAN FOR SITE 24
The Phase IIRI report, the vadose zone FS report, and the vadose zone Proposed Plan for
Site 24 were released to the public in April 1997. These documents were made available
to the public at the information repository maintained at the Heritage Park Regional
Library. The notice of availability for these documents was published in the Orange
County Register and the Los Angeles Times (Orange County edition) on 23 April 1997.
The notices also announced the availability of the administrative record file for review.
Complete administrative record files are available at the Southwest Division Naval
Facilities Engineering Command in San Diego and at MCAS El Toro. A partial record
file is available for review at the information repository. The information repository also
contains a complete index of the administrative record file along with information on how
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Date: 09/24/97
Section 3 Highlights of Community Participation
to access the complete file at the Station. The Proposed Plan was also distributed to the
MCAS El Toro project mailing list.
A public comment period was held from 30 April to 30 May 1997. In addition, a public
meeting was held on 15 May 1997. This meeting was announced in the Orange County
Register and the Los Angeles Times (Orange County Edition) on 09 May 1997 and in the
Proposed Plan. Media alerts were also used to notify reporters that the public was invited
to the meeting and to encourage the reporters to attend and publicize the event. At this
meeting, representatives from the DON, MCAS El Toro, and environmental regulatory
agencies answered questions about site conditions and the remedial alternatives under
consideration and a public recorder recorded verbal and written public comments.
Comment forms were also provided to encourage submittal of written comments after the
meeting. A response to the comments received during this period is included in the
Responsiveness Summary, which is part of this ROD. This decision document presents
the selected remedial action for the Site 24 vadose zone at MCAS El Toro in Orange
County, California, developed in accordance with the Comprehensive Environmental
Response, Compensation, and Liability Act of 1980 (CERCLA), as amended by the
Superfund Amendments and Reauthorization Act of 1986 (SARA), and the National Oil
and Hazardous Substances Pollution Contingency Plan (NCP). The decision for this site
is based on information contained within the administrative record.
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Section 3 Highlights of Community Participation
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Section 4
SCOPE AND ROLE OF OPERABLE UNIT
OU-2A was defined to address the source of regional groundwater contamination. Although
other OUs have been identified at MCAS El Toro, these OUs are not related to the VOC source
area.
Site 24 poses a potential threat to human health because of the possibility of ingestion,
inhalation, or dermal contact with the contaminated groundwater beneath the site. There is no
significant risk due to VOCs in shallow soil. The purpose of this response is remove the VOCs
in the soil beneath the site in order to minimize or prevent future contamination of groundwater.
The action described in this decision document is an interim action because only vadose zone
soil is addressed. The vadose zone is the soil interval from the ground surface to the water table.
The vadose zone soil interval is approximately 85 to 120 feet thick beneath Site 24. Remediation
of contaminated groundwater at Site 24 will be addressed in a separate ROD.
In addition to Site 24, OU-2A also contains Site 25, Major Drainages. Site 25 was originally
included in OU-2A because it was thought to have a potential to contribute to the regional
groundwater contamination. Site 25 has now been investigated and it has been determined that
this site is not a source of the regional VOC contamination. Site 25 will be addressed in a
separate ROD.
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Section 4 Scope and Role of Operable Unit
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Section 5
SUMMARY OF SITE CHARACTERISTICS
This section provides an overview of site contamination and the actual and potential routes of
exposure posed by the conditions at the site.
5.1 POTENTIAL SOURCES OF CONTAMINATION
The VOCs at Site 24 may have come from solvents containing TCE and PCE that were
used at Site 24 until approximately 1975. The precise origin, nature, and use of VOCs
released at the site and the specific circumstances and quantities of individual releases are
not documented. Active VOC sources are believed to no longer exist at Site 24.
Therefore, there were no clearly visible or currently active aboveground sources (or
activities) that could be used as an initial focus of the RIs. Most of the storage facilities
have either been abandoned in place or completely removed, and former disposal
practices have been discontinued. In some cases, remnants of formerly active sources are
visible at the surface, and in other cases they are not. Because there are no currently
active, aboveground sources to locate former release areas, potential VOC sources were
identified by reviewing the RFA and Phase I data; reviewing Station records; conducting
interviews with former operations staff involved with solvent storage, use, and disposal;
and inspecting facilities within Site 24.
The potential sources at Site 24 were divided into two categories: subsurface and surface.
These categories are based on the mechanism by which VOCs may have been released
into the subsurface. Table 5-1 summarizes the two categories of potential sources of
VOC contamination at Site 24.
Table 5-1
Two Categories of Potential Sources of VOC Contamination at Site 24
Potential Source Description
Subsurface Source Former degreaser pits and solvent tanks
Storm drains and industrial wastewater lines
Vehicle wash racks with associated drains and sumps
Underground storage tanks
Surface Source Aircraft washing
Waste-handling practices
Hazardous waste storage areas
Tarmac runoff
5.1.1 Potential Subsurface Sources
Potential subsurface sources include former degreaser pits and solvent tanks, storm drain
and industrial wastewater sewer lines, vehicle wash racks with associated drains and
sumps, and underground storage tanks. These are areas and features where releases may
have occurred at discrete point source locations, at regular intervals, and directly into the
subsurface. Potential subsurface source areas exist where permanent, man-made facilities
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 5-1
09/18/97 4:36 PM um l:toord_p-1V«poru\cto13SVo
-------
Date. 09/24/97
Section 5 Summary of Site Characteristics
are designed into the infrastructure that may have directed solvents to precise locations
(point sources) of release. These facilities were designed to handle industrial waste at
regular intervals as a function of the industrial activities they supported. These point-
source areas are subsurface features that were in direct contact with soil beneath Site 24.
Table 5-2 presents a survey of the potential subsurface sources at Site 24, including
location, physical description, and potential VOC release mechanisms.
5.1.2 Potential Surface Sources
Potential surface sources are located where practices, as opposed to infrastructure,
resulted in intermittent releases at different locations on the Station. These types of
potential releases may have occurred at random locations on the ground surface as a
result of aircraft washing, temporary waste storage, handling and disposal practices,
surface cover runoff, and dust-suppression activities. Potential surface sources are
summarized in Table 5-3 and include hazardous waste storage areas, ditches that
collected runoff adjacent to paved areas, areas where solvents may have been used with
water for aircraft washing, and open areas of the ground where occasional dumping of
liquid waste may have occurred.
5.2 TYPES OF CONTAMINATION AND AFFECTED MEDIA
The chemicals of concern at Site 24 are VOCs. VOCs are present in soil and
groundwater. VOCs reported to be present at the site include TCE, PCE,
1,1-dichloroethene (DCE), and carbon tetrachloride. The horizontal and vertical extent of
VOCs in the vadose zone was characterized using soil and soil gas sampling and analysis.
This characterization showed that the primary VOC source is present beneath Buildings
296 and 297, extending to the south with decreasing concentrations to the southern
Station boundary. Several smaller source areas exist in the soil beneath Site 24, including
a PCE soil gas plume located west of Building 297. The VOC concentrations in soil gas
generally increase with depth, and the highest concentrations occur near the water table.
VOCs in the area of Buildings 296 and 297 extend to groundwater directly beneath those
buildings. Measured soil gas and groundwater TCE concentrations demonstrate that TCE
mass flux is from the vadose zone toward groundwater. The trend of increasing soil gas
concentrations with depth suggests a depleting source at the surface that is consistent with
the assumed end of TCE usage in approximately 1975.
The horizontal and vertical extent of VOCs in groundwater was characterized using
Phase IRI data combined with additional monitoring well and HydroPunch sampling and
analysis. This characterization showed that VOCs from the soils at Site 24 have impacted
shallow groundwater beneath the site, but the deeper groundwater or principal aquifer is
not affected beneath Site 24. However, as shown in Figure 5-1, the principal aquifer west
of the Station boundary has low-level TCE contamination. VOCs besides TCE were
found in the groundwater, but only within the plume.
page 5-2 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
09/18/97 4:38 PM urn l:Word_p-1\™porll\clo1 J5Vxxft»ite24Vlftf»iaI\9700162f.Ooc
-------
Table 5-2
Potential Subsurface Sourcn of VOC* Contamination at Sttt 24
Potential
Soorces
Physical Description
LocatiM(t)
Nearest Building
PotMtlal VOC
Release Mechanism
VadoM lame VOC Detection*
(UFA* soil. Phase I soil gas, aad Pkase II soil data)
Status
Vehicle wash racks
DegreascrphJ
Vehicle wash rack.
3.200 square feet, concrete
Vehicle wash nek,
900 square feet, concrete
Thirteen degnaser pits with
solvent tanks
Northeast side of Building
386
Possible releases of VOCi mixed with water through cracks or
ovenpill and leakage from subsurface piping.
RfA: SWMUVAOC' 110
North end of Building 655 Possible releases of VOCs mixed with water through cracks or
overspill or leakage from subsurface piping.
UFA: SWMU/AOC 191
Rf A reported large cracks in concrete; dart stains and leaking
oil pans were observed on surface during the VSI*.
Three pits ill Building Possible relrises mixed with water from subsurface pits or
296, four pin in Building from drains tha are connected to those pits. Drab
297, six pin in Building connections and joints are subject to defects, which could
324 result in releases.
Storm drains and Storm drains and industrial
industrial waitewater wastewaier lines
lines
USTs1
Oil/water separator UST 291-8;
100-gallon steet installed in 1982
Waste oil UST 529:25.000-
gallon concrete; installed in 1944
Fuel UST 326-B: 250-gallon steel
stored JP-S (jet fuel)
Oil/water separator UST 759-A:
100-gallon steel; installed in 1982
Wasle oil UST 655; 2.000-gallen
fiberglass: installed in I9S4
•^fitff * tp" to degreaser
pits in Buildings 296,
possibly 297, and 324;
network of drains and
lines throughout Site 24
Northeast side of
Building 297
25 feet northeast of
Building 529
East of Building 326.
north of Building 524
Northwest of Building 655
Northeast of Building 655
Storm drains from Buildings 296 and 297 eventually
discharged into washes near Site 24. Building 324 is tied to
industrial wasuwaler sewer network. All lines are in direct
contact with vadose zone. Connections arc subject to defects
in joints and collars, which could result in releases mixed with
water.
Possible leaking UST
RFA: SWMU/AOC 76
Possible leaking UST
RFA: SWMU/AOC 145
M
Possible leaking UST
RFA: SWMU/AOC 283
Possible leaking UST
RFA: SWMU/AOC 199
Possible leaking UST
RFA: SWMU/AOC 250
Shallow soil gas: No VOCs found
(Phase IRT).
Shallow soil: PCS', maximum value • 11 tig/kg*
(RFA). attenuates with depth.
Shallow soil gas: TCE'sadPCE
(Phase IRI).
Shallow soil PCE, maximum vahie - 16 ug/kg. 5 feet
bgs'(RFA).
Shallow oil gas: TCE, PCE, and Frcon 113 (Phase I
W%
Shallow soil: TCE only, maximum value - 25 ug/kg
(Phase II Rft.
Shallow soil gas data indicates elevated TCE and PCE
concentrations near Buildings 296 and 297 and to a
lesser degree at Building 324.
Shallow Mil gas: TCE, PCE (Phase IW).
Shallow soil: TCE, maximum vahie • 12 Mg/kg
(UFA); attenuates with depth.
Shallow soil gas: No VOCs found.
Shallow soil: PCE, maximum value • 4 Mg/kg (RFA);
attenuates with depth.
Shallow soil gas: TCE and PCE (Phase I Rl).
Shallow soil: TCE: maximum value - 3 Mg/kg (RFA);
attenuates with depth.
Shallow soil «s: TCE ind PCE (Phise I Rl).
Shallow soil:~No TCE or PCE found.
Shallow soil gas: TCE and PCE (Phase I Rl).
Shallow soil: PCE; maximum value" 9 fig/Vg (RFA);
attenuates with depth.
Currently active.
Currently active.
Thirteen degreaser pits have been taken out of service
and/or abandoned in place.
The industrial wastewaier lines were reportedly used
for only 6 months (dates unknown). The method or
date of abandonment is unknown.
The storm drain system is currently active and is
connected to some of the industrial facilities of Site 24.
Currently active.
Scheduled for removal in 1997.
Currently inactive. Scheduled for removal in 1996 or
1997.
Currently inactive. Scheduled for removal in 1996 or
1997. RFA recommended no further action.
Currently active.
Removed in 1993. RFA recommended no further
action.
Notec
VOC - volatile organic compound
RFA - Resource Conservation and Recovery Act (RCRA) Facility Assessment
SWMU - soCd waste management unt
AOC - area of concern
Rl - Remedial Investijatioa
PCE - tetrachloroefnene
ug/Vg - micrograms per kilogram
VSI - visual site inspection
TCE - tncnloroetnerw
UST - underground storage tank
page 5-J •+ 5"' V
-------
TaMtS-1
Potential Surface Sources of voc* Contamination at SHa 24
Potential Soirees
Pkytkal DcKriptioa
Loc»tioB(>>
Nearest biUiac
Potnttal VOC Release Meekaaisa
Vadose Zone VOC Detcetiou
(UFA* soil Phase I soil gas,
ittd Phase II tail dtu)
Sutol
Hazardous waste storage areas
Tarmac runoff
parking tpron PA-1
Aircraft ua: ning operations
Hazardous watte storage area*.
approximately 1 acre,
unpavcd; hazardous waste
Borage areas. 260 square feel.
concrete
Aircraft parking apron,
34,000 square feet, concrete,
constructed o 1973
Aircraft washing operations
Liquid wastes used lor dust
Between Buildings Uopaved drum storage area; drums could leak.
324 and 326 RFA: SWMir/ACXT 9$
Ahaninun sbed over coacrete surface cover, stored
Near Building SCO waste oil, antifreeze, expired batteries, and grease.
SWMWAOC229
Wane handling
Waiu-handling practices
Nonhweo of
Building 297
Unknown
Unknown
Unknown
Possible releases of VOCs mixed whh wain from
runoff toward soudiwesi; UE lined drainage ditch at
southern edge.
Employee interviews indicate aircraft nuy have been
sprayed whli sorveat then rinsed whh wBer. Tbe
waste stream ftnenud from this practice could have
mfiteated
AOC - area of concern
PCE - tetracnkxoelrtena
TCE - tricrtloroeftien*
Rl - Remedial Investigation
PQ/VQ — microo,rafns pet kiloorani
bg> - below around surtac*-
page 5-5 •<
-------
LEGEND
TC£ CCWCEXTBATIONS N GBOU*O1*ATM
JUM •«« TO occExeen KM
6B.OW I »AftT3 P€H BUJOH (ppkl
A»ove i «» (SHAUOW
•ANUS »0y ABOVt I M TO SO M»
~0.5— ret CONTOUI «
ret COMTOUI
1
•000
firr
Record of Dccisioit
Figure 5-1
TCE Concentrations in th«
Shallow and Principal Aquifers
MCAS. El Toro. California
Bechtrl NtOonil to^_
CLEAN II Prognm
Date: 9/1S/97
Pil» No- 135H2686
Job No. J22H-135
paje 5-7 •»• 6"-
-------
Date: 09/24/97
Section 5 Summary of Site Characteristics
5.2.1 Vadose Zone Contamination
The Phase I RI sampling and analysis program demonstrated that soil gas sampling was
the most effective way to characterize the nature and extent of VOCs in the vadose zone.
Potential source areas were identified by investigating the upper 20 feet of soil, with
some samples collected as deep as 30 feet bgs. TCE hot spots were identified beneath
Buildings 296 and 297. The Phase II investigation extended the Phase I soil gas survey
by sampling for VOCs from approximately 30 feet bgs to the ground water. Together,
these soil gas investigations helped characterize the horizontal and vertical extent of
VOCs in the vadose zone.
The VOC concentrations in soil gas generally increase with depth, with the highest
concentrations near the water table (Figures 5-2 and 5-3). VOCs in the area of
Buildings 296 and 297 extend to groundwater directly beneath those buildings. Measured
soil gas and groundwater TCE concentrations demonstrate that TCE mass flux is from the
vadose zone toward groundwater. The trend of increasing soil gas concentrations with
depth suggests a depleting source at the surface that is consistent with the assumed end of
TCE usage in about 1975. The TCE-contaminated area also extends to the south of
Buildjngs 296 and 297, decreasing in concentration to the southern Station boundary.
Figures 5-2 and 5-3 are cross sections that illustrate the vadose zone beneath Site 24. In
general, these cross sections show that the TCE concentrations in soil gas increase and
are more widely distributed with depth. The highest concentrations are near the water
table. TCE in soil gas was reported at concentrations up to 6,120 ug/L, which exceeds
the concentration in equilibrium with TCE-contaminated groundwater. This indicates
that an active mechanism exists to transfer TCE from the vadose zone to groundwater.
Low TCE concentrations in soil and soil gas near the surface may be due to continued
flushing by infiltrating water after TCE use was discontinued and by volatilization of the
TCE into the atmosphere.
VOCs were reported in soil samples only at very low concentrations. This is probably
due to a low organic carbon content in the soil, release of TCE to the vadose zone in the
dissolved phase, release to the atmosphere, and flushing with infiltrating surface water.
Although much of the VOC contamination present at Site 24 is believed to have entered
the soil at or close to the surface, the current contamination level near the ground surface
is low relative to deeper in the vadose zone. Soil samples collected from the upper
10 feet of soil at Site 24 contained VOC concentrations less than 21 micrograms per
kilogram (ug/kg). The highest TCE concentration detected in soil from the vadose zone
during the Phase I RI was 400 ug/kg, and during the Phase II RI the highest concentration
was 190 ug/kg.
5.2.2 Groundwater Contamination
At the conclusion of the Phase I RI, the groundwater hot spot was defined as the area
represented by TCE concentrations greater than 500 ug/L. This hot spot was located
OU-2A Draft Final Interim Record of Decision - Site 24. MCAS El Toro page 5-9
09D8/97 4:36 PM urn tbmrd^1trapaiWcto135\nxflito24V*tfiniAS7001S2f.doc
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Date: 09/24/97
Section 5 Summary of Site Characteristics
approximately 1,500 feet northwest of Building 297. Groundwater beneath Site 24 was
further investigated during the Phase II RI to complete the horizontal and vertical
characterization of VOCs. Groundwater samples were collected from three new water
table monitoring wells, three deep monitoring wells, two air-sparging wells, eight
HydroPunch locations, and one existing well. In addition, an abandoned water-supply
well was located and sampled to assess VOC concentrations.
Horizontal Characterization
TCE concentrations in groundwater samples collected from wells 24NEW7 and 24NEW8
(at the northern extent of the TCE groundwater hot spot) were 33 ng/L and less than
1 u.g/L, respectively. TCE was detected in groundwater beneath Building 296 at
3,100 ug/L (HCPT83), beneath Building 297 at 1,300 ug/L (HCPT81), and at 1,000 ug/L
from the sample collected at well 24NEW4. These Phase II data extended the
groundwater hot spot to the southeast and linked the VOC-contaminated soil beneath
Buildings 296 and 297 to the groundwater hot spot. Figures 5-4 and 5-5 illustrate the
TCE contaminant plume in the shallow groundwater unit. The contours in these figures
are based on data from Phase I and Phase II groundwater sampling. Phase II monitoring
wells and HydroPunch locations have been included in Figure 5-4. The TCE
concentrations reported at the respective sampling locations are also included. For
HydroPunch samples, only the highest TCE concentration is recorded.
The upper 40 feet of the shallow groundwater unit is characterized by fairly uniform TCE
concentrations that extend from Building 297 to the Phase I hot spot. Concentrations in
this area range from 560 to 1,300 ug/L. One groundwater sample collected beneath
Building 296 contained 3,100 ug/L TCE at a depth of approximately 60 feet below the
water table. The chemical data are generally consistent with stratigraphic analysis, which
demonstrates that a fairly sandy unit with some fine-grained interbeds occupies the upper
40 feet of the shallow groundwater unit. This stratification in the aquifer is illustrated in
geologic cross section B-B' (Figure 5-2), which is approximately parallel to groundwater
flow. TCE concentrations in groundwater are contoured in cross sections B-B' and C-C'
(Figure 5-3).
Vertical Characterization
At the conclusion of the Phase I RI, the vertical characterization of VOCs in groundwater
beneath Site 24 was based on data from one nested monitoring well (18_BGMW03A, B,
C, and E). The nested well consisted of four separate wells, drilled within approximately
10 feet of each other and screened at different depths.
The groundwater samples collected from these wells gave the first indication of the
vertical extent of VOCs in groundwater beneath Site 24. The water table well
(18_BGMW03E) contained 370 ng/L TCE in December 1992, and 210 ug/L in July
1993. This well is screened between 124 and 164 feet bgs. The next deeper well
(18_BGMW03C) did not contain TCE above the detection limit. The well screen is
page 5-10 OU-2A Draft Final Interim Record of Decision - Site 24. MCAS El Toro
09/18/97 4:36 PM Mm ttaiard_p-1VvportiUo135tRid\sila24\ifflnnal\9700162f.doc
-------
-N-
LEfiEtffl
8W1.DING 00 PAD
. . . __ ;:B£A»IS QO WASH
TT/. *~. " "MOVED OOAOS
( I I OA*P.OAO
IH.ASE I UMr BOUftOAAr
-«. BASE lOUMOAnT
iSOCONCENTOAnON COMTOUA OF TCE M
Cfk/\ CKOUMlWArER luB^LI (FROM CAMPUS COl
3WW jui, mi 10 JAMJAR* mi RESU.TS •>
C-1 PHASE I T.MJ
REOCFMCD ISOCONCENTRAriON CONTOUR
COLULECTED OCTOaER IM9 TO MMJARr
SCIL GAS CONCENTRATIONS:
tQ TO SO MQ/L TCC
a o TO >oo MI^I- TC<
soo TO 3000 >*fl/i tee
GPtMEA THAN 300 0 ««/L TCC
sxisriNQ;
».
TABLE
oe ICE
PHASE 1 WOMTORMG WELL IWITH
•«G>-ESr ret CONCENTqAnOM W ^g/tl
Record ol 0»cl»k>i>
Figure 5-4
TCE in lh« Shallow GroundwaUr Unit and
Soil Cat Near lh« w»l«f Tabl*
MCAS. El Toro. Colifornia
' HtQmil. Inc. | r,,« Na -3:-;35'
C'uiAN II Program i Jo° No H^"-^5
| ^ev No *
page 5-)$- b"/'
-------
-AASH
AQUA CHINO" WASH
SOL3'7E J-COB5 EM
t CO**CENTR*T.C1S «
UAav w4 (memoes
e • m OATAJ
10 ro JOO UQ/L TCC
soo TO iooo MO/L rcc
GAEATER TMAM 9000 -8/L TCt
STREAM OR WASM
OfiECTiQN (X GRQUMIWArER FLOW
-N-
I
J.OOO
=t=
ftf
Record of Decision
Figure 5-5
TCE Concentrations in Groundwater
Shjllow Aquifer
MCAS. El Toro. California
NmUontl. Inc.
CLEAN II Program
Oaie 6/2J.-97
?.l« No. I35H2496
Jco No J22H-135
Bev 'lo C
-------
Date: 09/24/97
Section 5 Summary of Site Characteristics
between 222 and 242 feet bgs. According to the boring log, a 24-foot-thick layer of silt
and clay separates wells 18_BGMW03E and 18_BGMW03C at depths between 180 and
204 feet bgs. In July 1993, the next deeper well screen (18_BGMW03D; 280 to 300 feet
bgs) had an estimated TCE concentration of 0.8 pg/L.
Silt and clay layers that separate sandy units were encountered in all deep borings and
CPT locations. Hydraulic conductivity measurements yielded a range of vertical
conductivity values for silts and clays between 10'5 and 10 centimeters per second
(cm/s) at depths between 160 and 220 feet bgs (BNI 1997a). These data are shown on the
geologic cross section drawings (Figures 1 -3 and 1 -4). Beneath the coarser grained beds
in the upper 40 feet of the shallow groundwater unit are silt and clay beds. The TCE
concentration in groundwater decreases markedly as the upper permeable units are
separated from lower permeable units by these silts and clays.
The highest concentration of TCE in groundwater was found beneath Building 296 at a
depth of 169 feet bgs. TCE was detected at 3,100 ng/L at sample location HCPT83. The
sample collected 16 feet deeper (185 feet bgs) contained TCE at a concentration of
26ng/L.
Based on a review of the groundwater sample results from the deep monitoring wells
18_BGMW03, 24NEW1, 24NEW5, and the HydroPunch locations, the vertical extent of
TCE contamination in groundwater beneath Site 24 is limited to approximately the top
100 feet of the saturated zone. This is probably due to the very low-permeability silt and
clay units described previously, and the lack of a strong downward gradient. Off-Station,
the vertical extent of TCE contamination is much greater and includes the principal
aquifer. The TCE plume in the principal aquifer is shown on Figure 5-6. Off-Station, the
maximum reported TCE concentration was 47.8 ug/L in well 18_MCAS07-4 from a
sample collected on 12 December 1995 (OCWD 1996). Migration of TCE from the
shallow groundwater unit to the principal aquifer is probably due to downward gradients
caused by agricultural well pumping.
5.3 MASS OF TCE
The mass of TCE at Site 24 was estimated in the Phase II RI report (BNI 1997a). At
Site 24, approximately 1,500 pounds of TCE are estimated to be present in soil gas.
Assuming the soil pore space is equally shared by soil gas and soil moisture, an
additional 4,000 pounds of TCE would be present in the soil moisture. Based on the low
organic carbon content of the soil, the adsorbed mass of TCE is on the order of
500 pounds. The mass of TCE in groundwater beneath Site 24 is estimated to be
approximately 2,000 pounds. Based on these estimates, there is approximately 3 times
more TCE in the vadose zone than in the groundwater at Site 24.
5.4 ROUTES OF EXPOSURE
Currently, there are no complete exposure pathways to receptors from groundwater at
Site 24 because groundwater beneath this site is not being used for potable purposes or
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 5-19
09DB/97 4:36 PM lam l:Vword_p-1\reporu\clo135(nxta
-------
Date: 09/24/97
Section 5 Summary of Site Characteristics
for irrigation. Exposure to contamination in soils could occur through ingestion,
inhalation, or dermal contact.
The fate and transport discussion presented in the Phase II RI report (BNI 1997a) showed
that VOCs present in the soil at Site 24 have the ability to migrate to groundwater. VOCs
in soils can migrate through the vadose zone in the following ways:
• as a vapor,
• dissolved in soil moisture, or
• as a dense nonaqueous-phase liquid (DNAPL).
Most VOCs have a high vapor pressure and tend to volatilize readily in the vadose zone.
These vapors have a high relative density when compared to air and tend to sink through
the vadose zone where the soil has significant permeability. Molecular diffusion is
another mechanism responsible for vapor migration. Diffusion occurs outward, away
from the zones of highest concentration. Both mechanisms can create a substantial
volume of contaminated soil gas that is highly mobile when compared to the liquid
counterpart. Soil vapor from VOC sources has been shown to contribute to groundwater
contamination (Mercer and Cohen 1993).
The liquid phases are most influenced by gravity and capillary pressure. When the
gravity force exceeds the necessary capillary entry pressure, VOC-contaminated fluids
migrate downward toward the water table. Because of the relatively high fluid density
and low viscosity of a DNAPL compared to water, small amounts of these fluids can
migrate even more effectively than water through relatively thick vadose zones.
However, the RI concluded that since most of the VOCs released at Site 24 were
dissolved in water as a result of cleaning and washing activities, it is likely that the
majority of the liquid present in the vadose zone is found in the dissolved form. The
relatively low VOC concentrations present in the vadose zone support this hypothesis.
Migration of vapors and dissolved-phase VOCs from the vadose zone to groundwater is a
concern because calculations and modeling performed as part of the Phase II RI showed
that the concentration of TCE and PCE in the soils is high enough for these VOCs to
continue to contaminate the shallow aquifer below Site 24 above the maximum
contaminant levels (MCLs) (BNI 1997a). This means that remediation of groundwater
alone may not be effective in protecting human health, and that the source of groundwater
contamination (i.e., VOCs in the vadose zone) should also be addressed.
page 5-20 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
09/18/97 4:36 PM Mm l:Word_p-t\n»port«\clo)35Voerai1«24WrtfinaA9700162r.aoc
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LEGEND
•>GL'A CHINON
W-SH
CC CO«CE»"<«"<»iS 1 0«Ol«0»« res
UNC >b«J TO 0€CfM0eft it«3
30 ro 300 u9/l TCC
SIIKAM OH »«»
of
-N-
j
1000
=£=
FEET
F.*cord ol Dociston
Figure 5-6
OU-silu £«ltnl ol TCE Conctnlritloni
In Principal Aquifer
MCAS. El Toro, California
| Ci:- 8. 2J/97
Bochtft N»Uonil. Inc. .-,.- Mo '^5-2383
CLEAN II . rogram J=o "'° 3JJ-'-'35
Sev No C
paga i-21 '
-------
Section 5 Summary of Site Characteristics
El Toro Marine Corps Air Station, El Toro, California
Please contact Region 9 for copy of the following figures:
Figure 5-2 - (Cross Sections A-A' and B-B' - Analytical Results for TCE)
Figure 5-3 - (Cross Sections C-C' and D-D' - Analytical Results for TCE)
-------
Date: 09/24/97
Section 6
SUMMARY OF SITE RISKS
A human-health risk assessment (HHRA) was conducted for Site 24 using data collected during
the RI. The human-health evaluation methodology is provided in Section 6 and Appendix P of
the draft final RI report (BNI 1997a). No ecological risk assessment was performed for this site
because it is highly industrialized and does not provide a suitable habitat for any endangered or
threatened species of wildlife.
6.1 CONTAMINANT IDENTIFICATION
The procedures used to identify the chemicals of potential concern (COPCs) to be
evaluated in this assessment are consistent with EPA's Risk Assessment Guidance for
Superfund (U.S. EPA 1989) and Guidance for Data Usability in Risk Assessment
(U.S. EPA 1992a). Only VOCs were evaluated. The VOCs evaluated included those
identified as COPCs during the Phase I RI and additional VOCs detected during the
Phase II RI. The COPCs used were the 14 VOCs identified in the upper 10 feet of soil
and in groundwater from monitoring wells located within the site. Except for 2-hexanone,
the COPCs in soil were also found in the groundwater. Nine additional COPCs were
present in the groundwater. COPCs for soil and groundwater are shown in Table 6-1.
6.2 EXPOSURE ASSESSMENT
Site 24 is located in a highly industrialized portion of MCAS El Toro. The site contains
buildings supporting the aircraft activities at the Station and concrete parking areas for
vehicles and aircraft. Off-Station land near Site 24 is zoned for commercial, industrial,
and agricultural use. MCAS El Toro is scheduled to be closed in 1999. According to the
proposed reuse plan, the primary reuse of Site 24 is aviation support. However, since this
plan may not represent the final reuse of Site 24, a variety of scenarios, including
residential, industrial, recreational, and excavation were considered in the risk assessment.
*
6.2.1 Residential Scenario
Under the residential scenario, the resident is assumed to be a person who lives in a house
on-site from birth to age 30. Thirty years is the 90th percentile of time that people in the
United States live at one address (U.S. EPA 1989). Because soil excavation to about 10 feet
may occur during the construction of basements and swimming pools and some of the soil
from the subsurface may be left on the surface, COPCs in soil to 10 feet bgs or samples
closest to 10 feet bgs are treated as being available to the resident. Water used in the home
is assumed to come from a private well which draws water from the shallow aquifer beneath
the site. The exposure routes used in the risk assessment for the resident included ingestion,
dermal contact, and inhalation of soil VOCs and ingestion, dermal contact, and inhalation of
groundwater VOCs. Although it is unlikely that anyone would install a private well to
obtain water for home use (due to the availability of a municipal water supply), the potential
risk presented by the COPCs in groundwater was estimated using exposure conditions
associated with residential use of the ground water (as tap water).
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 6-1
0*18/97 4:37 PM *am l:tword_p-1\raporu\eto135«rodtiite24VminaA97001620.doc
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Date: 09/24/97
Section 6 Summary of Site Risks
Table 6-1
Chemicals of Potential Concern in Soil and Groundwater
Soil
(0 to 2 feet bgs*)
Soil
(0 to 10 feet bgs)
Groundwater
Acetone
Benzene
2-butanone
Carbon disulfide
Carbon tetrachloride
1,2-dichloroethene (mixture)
Ethylbenzene
2-hexanone
Methylene chloride
Tetrachloroethene
Toluene
1,1,1-trichloroethane
Trichloroethene
Xylenes
Acetone
Benzene
2-butanone
Carbon disulfide
Carbon tetrachloride
1,2-dichloroethene (mixture)
Ethylbenzene
2-hexanone
Methylene chloride
Tetrachloroethene
Toluene
1,1,1-trichloroethane
Trichloroethene
Xylenes
Acetone
Benzene
Bromodichloromethane
Bromoform
2-butanone
Carbon disulfide
Carbon tetrachloride
Chloroform
Chloromethane
Dibromochloromethane
1,2-dichloroethane
1,1-dichloroethene
1,2-dichloroethene (mixture)
Ethylbenzene
4-methyl-2-pentanone
Methylene chloride
Styrene
Tetrach loroethene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethene
Xylenes
Note:
bgs - below ground surface
6.2.2 Industrial Scenario
If the site were redeveloped for commercial business, the individuals most likely to be
exposed would be owners and employees of the businesses. An office worker was chosen
to represent business owners and employees. The office worker is a person who works
8 hours a day in a commercial building on-site for a period of 25 years, which is the
exposure duration recommended by U.S. EPA (U.S. EPA 1989) for workers. Only
COPCs in the upper 2 feet of soil are considered to be available to the office worker. The
workplace water supply is assumed to be provided by the local water utility. Therefore,
exposure of the office worker to COPCs in the groundwater at the workplace is not
page 6-2
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Section 6 Summary of Site Risks
considered to be possible. Exposure routes for soil include ingestion, dermal contact, and
inhalation of VOCs.
6.2.3 Recreational Scenario
If the site were redeveloped into a park, the most highly exposed individuals would be
people involved in grounds maintenance or park users, depending on the frequency and
amount of time spent at the park. A park user was chosen for the risk assessment rather
than a grounds maintenance worker because the risk to the park user approximates the
risk to the grounds maintenance worker if the latter spends 1 or 2 days a week on
maintenance work. The park user is assumed to be an older child from ages 9 to 16 years
who plays unsupervised in the park daily 2 hours a day for 7 years. This exposure
regimen was arbitrarily chosen after evaluation for its reasonableness. As with the office
worker, only COPCs in the upper 2 feet of soil are considered to be available to the park
user. Exposure routes for soil include ingestion, dermal contact, and inhalation of VOCs.
COPCs in groundwater are assumed to be unavailable to the park user while at the park.
6.2.4 Excavation Worker Scenario
The excavation worker is a person who works installing underground utility lines,
basements, and swimming pools. This worker is assumed to work for 8 hours a day for
1 year (250 work days). The excavation worker is exposed to soil to a depth of
10 feet bgs. Exposure routes for soil include ingestion, dermal contact, and inhalation of
VOCs.
6.2.5 Exposure Assumptions
Table 6-2 presents the exposure assumptions for each of the scenarios analyzed in the risk
assessment for Site 24. Exposure conditions used in the estimation of risk were chosen to
represent what is known as "reasonable maximum exposure" (RME). Use of these
exposure conditions tends to overestimate risk. This effort to overestimate risk is
deliberate; it provides risk managers a margin of error when making remediation
decisions. The combination of the intake variables, expressing the exposure conditions
for each receptor, results in a chronic daily dose. The dose is an estimate of exposure for
each pathway.
6.2.6 Calculation of Exposure-Point Concentration
An exposure-point concentration is the concentration of a chemical in soil, water, or air at
the point of contact with a receptor. In observance of the concept of the reasonable
maximum exposure (RME), the 95 percent upper confidence level (UCL) of the
arithmetic mean of the measured concentrations of each COPC was used as the exposure-
point concentration except when the number of measurements was less than four or when
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 6-3
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Section 6 Summary of Site Risks
Table 6-2
Values Assigned to Dose Equation Parameters
Equation Parameter
Averaging time (cancer)
Averaging time (noncancer)
Body weight
Dermal absorption factor
Exposed skin surface area (soil)e
Exposed skin surface area
(water)8
Exposure duration (cancer)
Exposure duration (noncancer)
Exposure frequency (air)1
Exposure frequency (water, bath)
Exposure frequency (soil)1
Exposure time (water, bath)
Exposure time (air)
Intake rate (air)
Intake rate (soil)
Intake rate (water)
Permeability constant
Soil adherence factor
Units
days
days
kgd
unitless
cm2f
cm2
years
years
days/year
days/year
days/year
hours/day
hrs/day
mVhi*
mg/day1
L/daym
cm/hr"
mg/cm20
Resident
Child*
25,550
EDe x 365
15
2,000
7,000
6
6
350
350
350
0.25
24
0.42
200
1
1
Resident
Adult
25,550
ED x 365
70
Office
Worker
25,550
ED x 365
70
Excavation
Worker
25,550
ED x 365
70
Value Depends on Chemical
5,000 5,000 5,000
19,000 NAh NA
• 24j
24
350
350
350 (oral)
100 (dermal)
0.25
24
0.83
100
2
25
25
250
NA
250
NA
8
0.83
50
NA
Value Depends on
1 1
1
1
250
NA
250
NA
8
2.5
480
NA
Chemical
1
Recreational
Childb
25,550
ED x 365
46
3,000
NA
7
7
350
NA
350
NA
2
2.5
100
NA
1
Notes:
* child age = 0 to 6 years
" child age = 9 to 16 years
6 ED - exposure duration
d kg - kilograms
* exposed skin = 25 percent of mean total body surface area; values rounded to the nearest
1,000 cm2 (U.S. EPA 1992b)
' cm2 - square centimeters
9 exposed skin (percent of mean total body surface area): resident child/adult =100 percent (bath);
values rounded to the nearest 1,000 cm
" NA-not applicable
' for the resident adult, the total exposure duration is 30 years with 6 years as a child and 24 years
as an adult
' exposure frequency: standard default for resident and worker; exposure regimen for recreational
child developed specifically for this assessment
k m3/hr - cubic meters per hour
1 mg/day - milligrams per day
m L/day-liters per day
" cm/hr - centimeters per hour
0 mg/cm2 - milligrams per square centimeter
page 6-4
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Section 6 Summary of Site Risks
the 95 percent UCL exceeded the highest measured concentration. In those cases, the
highest measured concentration was used as the exposure-point concentration. The
measured concentrations were assumed to have a lognormal distribution. Hence, the
95 percent UCL for a lognormal distribution was calculated in accordance with
procedures recommended by the U.S. EPA (1992a).
6.3 TOXICITY ASSESSMENT
Cancer slope factors (CSFs) have been developed by the U.S. EPA's Carcinogenic
Assessment Group for estimating excess lifetime cancer risks associated with exposure to
potentially carcinogenic chemicals. CSFs are expressed in units of (mg/kg-day)"1.. In
addition to the U.S. EPA-derived CSFs, Cal-EPA has developed CSFs for a group of
carcinogens. Following DON policy, both U.S. EPA and Cal-EPA CSFs were used in the
estimation of the risk from those chemicals when present. Cancer potency factors are
derived from the results of human epidemiological studies or chronic animal bioassays to
which animal-to-human extrapolation and uncertainty factors have been applied.
Reference doses (RfDs) have been developed by U.S. EPA for indicating the potential for
adverse health effects from exposure to chemicals exhibiting noncarcinogenic effects.
RfDs, which are expressed in units of mg/kg-day, are estimates of lifetime daily exposure
levels for humans, including sensitive individuals. RfDs are derived from human
epidemiological studies or animal studies to which uncertainty factors have been applied
(e.g., to account for the use of animal data to predict effects on humans). These
uncertainty factors help ensure that the RfDs do not underestimate the potential for
adverse noncarcinogenic effects to occur.
Table 6-3 shows the CSFs and RfDs for the COPCs detected in soil and groundwater at
Site 24.
6.4 RISK CHARACTERIZATION
Excess lifetime cancer risks are determined by multiplying the chronic daily dose with
the CSF. These risks are probabilities that are generally expressed in scientific notation
(e.g., 1 x 10"* or 1E-6). An excess lifetime cancer risk of 1 x 10"6 indicates that, as a
plausible upper bound, an individual has a one-in-a-million chance of developing cancer
as a result of site-related exposure to a carcinogen over a 70-year lifetime under the
specific exposure conditions at a site. The U.S. EPA has established guidelines to
manage cancer risks. Using these guidelines, excess cancer risks in the range of between
10"6 and 10"4 or less are generally considered acceptable.
Potential concern for noncarcinogenic effects of a single contaminant in a single medium
is expressed as the hazard quotient (HQ) (or the ratio of the estimated dose to the
contaminant's RfD). By adding the HQs for all contaminants within a medium or across
all media to which a given population may reasonably be exposed, the hazard index (HI)
can be generated. The HI provides a useful reference point for gauging the potential
significance of multiple contaminant exposures within a single medium or across media.
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Section 6 Summary of Site Risks
The U.S. EPA has established guidelines for noncancer risks. Using these guidelines, an
HI of less than 1.0 is generally considered protective of human health. If the HI is greater
than 1.0, an assessment of the chemicals is performed to determine whether the HI
represents an unacceptable noncarcinogenic human-health risk.
The results of the risk assessment for Site 24 are summarized in Table 6-4. The table
identifies the total cancer and/or noncancer risk for each receptor. In addition, it
identifies the chemicals contributing the majority of the cancer risk and HI (risk drivers),
the media associated with the risk drivers, and the exposure routes by which the risk
drivers exert their effects. Cancer risks and risk drivers shown in Table 6-4 are based on
a combination of U.S. EPA and Cal-EPA CSFs.
Noncancer risk in a resident child was calculated; however, noncancer risk in the resident
child is usually higher than in a resident adult because the child consumes more soil over
the assumed 6 years of exposure than an adult does over the assumed 24 years of
exposure.
The results indicate that if no remediation occurred and homes were built on-site, the
lifetime excess upper-bound cancer risk presented by COPCs in the groundwater and soil
to adult occupants of the homes would be about 2 chances in 1,000 (risk estimate of
2 x 10"3). The risk is primarily associated to the groundwater with 11 of the 23 COPCs in
the groundwater accounting for most of the risk. Risk from exposure to COPCs in
groundwater and soil by children living in the homes would be less than 7 x 10"4. The
results also showed that the concentrations of TCE and carbon tetrachloride in
groundwater from on-site wells are high enough to cause systemic effects in occupants of
the homes since His for both of the compounds exceeded 1.0.
The results indicate that if the site contained an office building or a park, or if a pit with a
depth of up to 10 feet were dug on the site and no remediation were performed, the
lifetime excess upper-bound cancer risk presented by COPCs in the soil would be no
more than about five chances in one billion (5 x 10"9) for people working in the building,
playing in the park, or working in the pit. The results also indicate that the concentrations
of the COPCs in the soil are not high enough to cause systemic effects (noncarcinogenic
effects) to the same people.
6.5 SUMMARY OF SITE RISKS
Risks posed by VOCs in soils are below the risk range considered acceptable by the
U.S. EPA. However, risks posed by VOCs in groundwater exceed this risk range. In
addition, the fate and transport analysis for Site 24 shows that the VOCs in soil have the
potential to migrate to groundwater where they may continue to contaminate groundwater
above the risk range considered acceptable to the U.S. EPA. Therefore, it is necessary to
take action to remediate VOCs in soils to prevent further contamination of the
groundwater.
page 6-6 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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TabU 6-3
Cancer Stop* Factor* and Reference Costs for Chemical* of Potential Concern In Son and Groundwater at Site 24
Chemical Mint
i-mntjyl-2-paionoM
Acetone
Benzene
Bromodichloromethane
Bromofonn (tribrornomeihinc)
Carton duulfide
Carbon tetnchloride
Chloroform
diMnMnetnafie
Dibromoc'ilorom ethane
l,2-4ichlaroeihane
1.2-dkblorocoienc (mixture)
l,I-
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Table 6-4
Summary of Human-Health Risk Results
Characteristic
Resident Adult
Resident Child
Recreational
Child
Office
Worker
Excavation
Worker
Total cancer risk
COPCs' in soil
COPCs in groundwater
Total
Hazard index
COPCs in soil
COPCs in groundwater
Total
Risk drivers (carcinogenic
effects and associated risk)'
,e.d
Risk drivers (noncancer effects)
and associated hazard index
Medium of concern*
Exposure route of concern'
2.2E-08
2.0E-03
2.0E-03
9.4E-04
8.6E+OI
8.6E+OI
Benzene (1.3 E-06)
Bromodichloromethane (5.2E-06)
Carbon tetrachloride (I.I E-OS)
Chloroform (I.IE-OS)
Chloromethane (I. IE -06)
Dibromochloromethane (I.I E-06)
1,2-dichloroethane (4.6E-06)
l,l-dichloroethene(5.0E-05)
Tetrachloroethene (4.7E-06)C
1,1,2-trichloroethane (4.2E-06)
Trichloroethene (1.9E-03)
Trichloroethene (8.5E+01)
Groundwater
9.4E-09
7.4E-04
7.4E-04
2.5E-03
2.0E+02
2.0E+02
Bromodichloromethane (1.9E-06)
Carbon tetrachloride (4.2E-06)
Chloroform (4.2E-06)
1,2-dichloroethane (1.7E-06)
l,l-dichloroethene(l.8E-05)
Tetrachloroethene (1.7E-06)
1, 1,2-trichloroethane (1.6E-06)
Trichloroethene (7.1E-04)
Carbon tetrachloride (I.3E+00)
Trichloroethene (2.0E+02)
Groundwater
Ingestion, inhalation, dermal contact Ingestion, inhalation, dermal contact
2.4E-09
NA"
2.4E-09
4.7E-04
NA
4.7E-04
None
None
NA
NA
5.4E-09
NA
5.4E-09
2.9E-04
NA
2.9E-04
None
None
NA
NA
5.IE-IO
NA
5.IE-10
7.8E-04
NA
7.8E-04
None
None
NA
NA
(O
(0
<0
Notes:
* COPC - chemical of potential concern
b NA-not applicable
0 based on United States Environmental Protection Agency and California Environmental Protection Agency cancer slope factors
d risk driver - COPC that poses a minimum multimedia cancer risk of 1 .OE-06 or minimum hazard index of 1.0
' medium of concern - medium (e.g.. soil) with COPCs that pose minimum multimedia cancer risk of 1 .OE-06 or minimum hazard index of 1.0
exposure route of concern - intake route through which COPCs pose a minimum multimedia cancer risk of 1.OE-06 or minimum hazard index of 1.0
P7 9.13 AM urn l:\word_p-1\rapofU\cta13SVo(Aiilt24\
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Date: 09/24/97
Section 7
DESCRIPTION OF ALTERNATIVES
Based on the Phase I and Phase II RIs, the baseline human-health risk assessment, and a review
of applicable or relevant and appropriate requirements (ARARs), the following remedial action
objectives were established for soil at Site 24:
• reduce concentrations of VOCs in the VOC source areas to prevent or minimize
further degradation of the shallow groundwater unit above the MCL for drinking
water; and
• continue vadose zone remediation until the average VOC soil gas concentrations are
below threshold concentrations (concentrations capable of contaminating
groundwater above the MCLs).
Remedial action objectives for groundwater at Site 24 will be addressed in a separate ROD.
The remedial action objectives for Site 24 were intended primarily to assure that VOC-
contaminated soils at Site 24 do not continue to contaminate the shallow groundwater unit
beneath the site. The VOC mass removed would then not have the opportunity to migrate from
the shallow groundwater unit to the principal aquifer. The principal aquifer (Irvine Forebay I) is
designated by the Santa Ana RWQCB as a current or potential source of drinking water, along
with other beneficial uses such as agriculture and industry.
The development of alternatives to meet the remedial action objectives followed the
requirements identified in CERCLA, as amended by SARA, 42 United States Code (USC)
Section 9602 et seq., and to the extent practicable, the NCP. The development of remedial
alternatives was also guided by prior U.S. EPA experience at VOC-contaminated sites. The
document Presumptive Remedies: Policies and Procedures (U.S. EPA 1993a) describes certain
preferred technologies or presumptive remedies for VOC-contaminated soil. Use of these
technologies is designed to expedite the investigation and selection of remediation alternatives.
The presumptive remedy approach allowed the feasibility study (FS) to focus on those
technologies that have proved to be most effective in the past. The presumptive remedy selected
for detailed evaluation in the FS was SVE in the vadose zone source area. The evaluation of
technologies and screening process that led to the development of this alternative is documented
in the Site 24 FS report (BNI 1997b). In addition to SVE, a no action alternative was also
evaluated in the FS. The no action alternative is intended to serve as a baseline against which the
other alternatives may be evaluated.
7.1 ALTERNATIVE 1 - NO ACTION
Alternative 1, the no action alternative, is required by CERCLA to provide a basis from
which to develop and evaluate the other remedial alternatives. Under the no action
alternative, no remediation measures or access or land-use controls would be initiated at
Site 24. Although groundwater monitoring is not a part of Alternative 1, sampling and
analysis of groundwater would continue under the MCAS El Toro Long-Term
Groundwater Plan. The no action alternative would have no effect on the physical,
biological, or chemical processes controlling the fate and transport of existing
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Section 7 Description of Alternatives
contamination at the site. With no action, VOCs in the soil beneath Site 24 could
continue to contaminate the shallow groundwater at levels exceeding the federal MCLs
for drinking water. This could cause the eventual remediation of groundwater (addressed
in a separate ROD) to be more costly and time consuming. There is no direct cost
associated with Alternative 1.
7.2 ALTERNATIVE 2 - SOIL VAPOR EXTRACTION
Alternative 2 is SVE, the U.S. EPA presumptive remedy for VOC-contaminated soil.
This process uses a vacuum to pull VOC-contaminated vapors from the soil through SVE
wells. Once the vapors are pulled to the surface, they are passed through an activated
carbon filter to remove the VOCs before the air is discharged to the atmosphere. When
the activated carbon filters become saturated with VOCs, the carbon is returned to the
manufacturer, where it is regenerated and the VOCs are destroyed.
The selected remedy includes the following:
• construction, operation, and maintenance of an SVE system to remove TCE and
other VOCs from the soil;
• performance monitoring throughout the predicted 2 to 4 years of remediation;
• treatment of VOC-contaminated soil gas (vapors) with activated carbon filters
to meet air quality standards prior to discharge to the atmosphere;
• confirmatory soil gas sampling at the end of the vadose zone remediation to
confirm that average VOC concentrations are too low to contaminate
groundwater above the MCLs; and
• the vadose zone will be resampled at the conclusion of groundwater
remediation. If the average soil gas concentrations are found to be above the
threshold limits, additional vadose zone remediation may be necessary.
Wastes, such as drill cuttings and contaminated personal protective equipment, would be
generated during the on-site activities associated with Alternative 2. Although these
wastes are not expected to be classified as characteristic hazardous wastes, that
determination will be made at the time the waste is generated.
Wastes generated from treatment of VOCs (e.g., spent carbon) may be classified as
hazardous if they exceed the criteria for toxicity established by the RCRA. Hazardous
waste determinations will be made at the time the waste is generated.
Institutional controls, including deed restrictions and access restrictions, are not required
at this time to protect human health because surface and near-surface soils have low
levels of VOC contamination and present a very low incremental risk to human health.
However, deed restrictions will be used to protect the SVE wells and equipment and
provide access to operate the system. Transfer of the property will be in accordance with
Section 120(h)(3) of CERCLA.
page 7-2 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
ana/97 07 PM/MTI tV«ort_p-1\™porti\c»0135VO
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Date: 09/24/97
Section 7 Description of Alternatives
SVE addresses the primary risk posed by soil contamination (which can be characterized
as a principal threat at this site) by removing and permanently destroying the
contaminants from soils, thereby significantly reducing the toxicity, mobility, or volume
of hazardous substances. By removing VOCs from the soil, further groundwater
contamination is minimized or prevented, thereby reducing the time required for
groundwater remediation.
The estimated net present worth cost for this remedial action is approximately $4.9
million in 1996 dollars. This includes capital costs of approximately $1.1 million,
operations and maintenance costs of approximately $2.5 million, and monitoring costs of
approximately $1.3 million. Remediation of contaminated soil is estimated to take 2 to
4 years to complete and would be conducted without excavating contaminated soil.
7.2.1 Description of the Soil Vapor Extraction System
The conceptual design of the SVE system (Figure 7-1) is based on the results of the
subsurface soil and soil gas investigations performed as part of the Phase II RI for Site 24
(BNI 1997a) and the results of the SVE pilot test performed as part of the Phase II FS
(BNI 1996b). TCE was used as the design VOC because it is the most frequently
detected contaminant at the site and because the footprint of the TCE plume in the vadose
zone generally encompasses the footprints of the other VOC contaminants.
The subsurface soil and soil gas investigations indicated that the primary TCE source area
is in the vicinity of Buildings 296 and 297. A secondary VOC source area, which
consists chiefly of PCE, was also identified to the west of Building 297. The SVE system
is designed to target these source areas. For the purpose of developing a conceptual
design, the vadose zone was divided into three vertical zones: a shallow zone (0 to
40 feet bgs), an intermediate zone (41 to 70 feet bgs), and a deep zone (71 to 110 feet
bgs). In general, the areal extent of the TCE plume in the shallow zone is relatively
limited. With depth, the source area becomes more extensive and reaches its maximum
areal extent in the deep zone. The SVE wells are designed to be screened over discrete
intervals targeting a specific vertical zone. Screening over discrete intervals will allow
the remediation efforts to focus on distinct stratigraphic units where variations in air
permeability may be low in comparison to the adjacent units. In addition, with simple
manifold and valving arrangements, a high level of flexibility can be built into the
system, allowing the operator to focus the remediation efforts three dimensionally.
The conceptual SVE well field design estimates that complete coverage of the TCE
source area within each zone is accomplished with an approximate well spacing of
400 feet. The final design will be fine-tuned as additional information is collected. A
well spacing of 400 feet was selected based on the results of the SVE radius of influence
test conducted as part of the Site 24 FS (BNI 1996b). The SVE well field consists of
21 existing SVE wells and 27 proposed wells (Figures 7-2 through 7-4) with variable
depths and screened intervals. Three different types of proposed wells are included:
shallow, intermediate, and deep. The conceptual design of each proposed well is shown
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Section? Description of Alternatives
in Table 7-1. The designs of existing SVE wells are provided in Table 7-2. Additional
SVE wells may be added at the design stage to target the different areas of contamination
shown in Figures 7-2 through 7-4.
The conceptual well designs provided in Table 7-1 were developed for the purpose of
cost estimating. Actual well designs and locations should be based on the subsurface
conditions, including depth to groundwater and stratigraphy determined at the time of
drilling.
The conceptual design flow for the proposed and existing 4-inch-diameter SVE wells is
125 cubic feet per minute (ftVmin) per well. The conceptual design flow for the existing
2-inch-diameter SVE wells is 100 fWmin per well. The total system flow is estimated to
be 5,500 ft3/min at a vacuum of approximately 30 inches of water. The extracted vapors
will be treated on-site using vapor-phase granular activated carbon (VGAC).
7.2.2 Results of Pilot Testing
As part of the RI/FS process, SVE pilot tests are being conducted to evaluate the
efficiency of using SVE to remove VOCs at Site 24. The first pilot test, conducted for 19
days, removed approximately 225 pounds of TCE and 50 pounds each of 1,1-DCE and
Freon 113 from one SVE well. The radius of influence of the well was estimated to be
approximately 280 feet. Additional 1-day tests confirmed that many of the other SVE
wells had a similar radius of influence. Based on the 1-day test data, an initial VOC mass
removal rate of about 190 pounds per day was estimated from 20 SVE wells. The test
data show that SVE is a promising technology for removing VOCs at Site 24.
Three additional SVE wells were pilot tested by the DON in 1996 and 1997. As of
July 1997, approximately 870 pounds of TCE had been removed using SVE at Site 24.
Additional pilot testing is planned in 1997 to evaluate SVE efficiency within other
contaminated areas.
7.2.3 Operation of the Soil Vapor Extraction System
The goal of operating SVE at Site 24 is to attain the remedial action objectives for the
vadose zone. To accomplish the remedial action objectives, the following general steps
will be followed:
• SVE System Design and Construction - The SVE system will be designed to
reduce VOC concentrations in areas of the vadose zone characterized as having
the ability to impact groundwater above the MCLs. Reducing VOC
concentrations in soil gas will also reduce the VOC concentrations adsorbed to
soil particles and dissolved in soil moisture. The SVE system design process
will begin with the evaluation of existing pilot test data from SVE wells at
Site 24. Pilot test data include applied vacuum and resultant extraction flow
rate; effluent VOC concentrations; estimated soil gas travel time; induced
vacuum at nearby wells; and stratigraphic relationships with other wells.
Additional SVE wells will be installed and tested in a like manner to complete
page 7-4 OU-2A Draft Final Interim Record of Decision - Site 24. MCAS El Tore
»18S7 4:37 PM/Iwi tVi»or«fj>-1V«pof«e«o135Vo*sit«2
-------
TO ATMOSPHERE
KNOCKOUT
DRUM
VCAC FILTERS
VACUUM BLOWER
SHALLCW
(10-40 'EET
DEEP;
INTERMEDIATE
(40-70 FEET
DEEP)
DEEP
(70-100 TEET
DEEP)
Record of D*cl»kx>
Figure 7-1
Sol Vtpor E>tr»ctlon Procen Flow Oltgrwn
UCAS. El Tore. California
I Oile- 5/J6/97
BfcMH HfHonml. Inc. :,\e NO '.35S23S<
CLEAN II Program j J<"> ^o :??H-i35
Rev No »
page 7-5
-------
• i -—' i :
••. •. /••-• ') //i
UECENO
i
4SO
01A.CWO OH '«O
STDtAM OK WASH
IMH1OVIO R0*0t
RMROAO
*MA8C I UMT
•AM •OUNOAKT
»UNQ LDCATIOIH
"V"
MAU I t(X »ATO* enIRACTlo. wtu
.FOII ncKDuncM or seeoMuwo. rei
Rvcord ol D«cl«ioa
Figure 7-2
SVE *«ll Lootlani
Shallow Soil Ga> Horizon 110-40 Fmt 0»»pl
MCAS. El Toro. California
a«c)H»< Ntllonil. hte.
CLEAN II Program
0«te 5/J'.'97
F.ia No OSLO'S
JoO No. !J?'J-'3S
Rov No. A
page?-?
-------
LESEUB
;~~~~"i
-N-
|
«SO
> "0
STRCAKS OB WA$H
iMpftoWEO SOAM
DAIROA0
PXASC i U»T
— - - — BASE eotwour
J.SvEiA
PMASC fl COC VAraM EKTRACTIOM WEU
VAPOR CKTRACnoii «tU.S
TCE SOt. Q^aj^paCEMrft^fpfiliS
i.O TO 30/.0/I.
S 0 TO 10 C 0p/l
JO 0 TO 500 0 •*/!.
GAEAren THAN sooo>*o^.
Record of Decision
Figure 7-3
SoB Vioor Extricton W*U Locilloni
lntBrm«diil» Soil Gas horizon 140-70 F«*l Ompl
MCAS. El Toro, California
Nttlonml. Inc.
CLEAN tl Program
Date S/2J'91
File Ho -35L2386
Job Mo 22J14-I35
Rev No. A
page 7-9 v 1 - / 0
-------
-N-
SUI.O(NO On PAD
STRCAWS OR WASM
..^ ------ T tVKIOveO AOAOS
-^r - - — AAiaOAD
— — •-« PHASE • UMT aOUM>APy
— - - — »Ot tOUWMT
APPHQlOtlArg !A*gUHQ lOCATIOH*
J4SVEI
PHAU I SOI VAPOA exTRACTION WELL
PKOPOUO 101. »*»OK cjiriiACrim wtu.»
tO TO ftO*»/V
10 TO 90.0 j«/L
SO 0 TO 500,0 j«A.
ORE A TEfl TMAM S00.0>*o/l
Rcord ol DccloJOfl
Figure 7-4
SVE W«ll Loollont
BMP Soil G»s Horizon I7O-KO F««l 0««pl
MCAS. El Toro. California
Htllonml Inc
ZLEAN II Program
Da« S/J7/97
P.le NO 135L236'
Joo No J22U.13S
Rov No. A
page?-
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Date: 09/24/97
Section? Description of Alternatives
Table 7-1
Conceptual Design of SVE" Wells
Well Type
Deep
Intermediate
Shallow
Total Depth
(feet)
100
70
40
Screened Interval Diameter
(feetbgs*) Number of Proposed Wells (inches)
70 to 100
40 to 70
10 to 40
8
7
12
4
4
4
Note:
SVE - soil vapor extraction
bgs - below ground surface
Table 7-2
Existing SVE' Well Characteristics
Boring
Number
24B2
24B6
24B7A
24B9
24B10
24B14
24B1S
24B16
24B17
24B18
24B21
24B22
24B23
24B26
SVE Well/
Piezometer No.
24SVE12
24SVE5
24SVE5A
24SVE10
24SVE9
24SVE9A
24SVE1 1
24SVE11A
24SVE8
24SVE8A
24SVE7
24SVE7A
24SVE14
24SVE3
24SVE3A
24SVE2
24SVE2A
24SVE4
24SVE6
24SVE1
24SVE13
Casing Type
2-inch Sche 40 PVC"
2-inch Sen 40 PVC
2-inch Sch 40 PVC
4-inch Sch 40 PVC
2-inch Sch 40 PVC
2-inch Sch 40 PVC
2-inch Sch 80 PVC
2-inch Sch 80 PVC
2-inch Sch 40 PVC
2-inch Sch 40 PVC
2-inch Sch 40 PVC
2-inch Sch 40 PVC
2-inch Sch 80 PVC
2-inch Sch 40 PVC
2-inch Sen 40 PVC
2-inch Sch 40 PVC
2-inch Sch 40 PVC
2-inch Sch 40 PVC
4-inch PVC
4-inch Sch 40 PVC
2-inch Sch 40 PVC
Screen Type
2-inch Sch 40 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
4-inch Sch 40 PVC, 0.01 -inch
2-inch Sch 40 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
2-inch Sch 80 PVC, 0.02-inch
2-inch Sch 80 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
2-inch Sch 80 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
4-inch Sch 40 PVC, 0.02-inch
4-inch Sch 40 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
4-inch PVC, 0.01 -inch
4-inch Sch 40 PVC, 0.02-inch
2-inch Sch 40 PVC, 0.02-inch
Screened Interval
(feet fags")
34 to 74
68 to 88
42 to 57
79 to 109
91 to 111
55 to 85
79tol09
43 to 73
83 to 113
50 to 78
80 to 110
63 to 74
78 to 108
80 to 105
45 to 60
80 to 105
40 to 70
85 to 105
85 to 109.5
91 to 109
79 to 109
Notes:
* SVE - soil vapor extraction
" bgs - below ground surface
c Sch - schedule
" PVC - polyvinyl chloride
OU-2A Draft Final Interim Record of Decision - Site 24. MCAS El Toro
ana/97 4:37 PM/um tWort_p-H™port»\cto135Vo*»«^*
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Date: 09/24/97
Section 7 Description of Alternatives
construction of the SVE well field in the vadose zone target areas. The
aboveground treatment system will be sized to accommodate the expected soil
vapor extraction flow rate.
• SVE System Startup - Initial startup of the SVE system will focus on
operating those wells that produce the highest VOC concentrations. Operating
the wells with the highest VOC concentrations maximizes VOC loading on the
carbon filters and reduces operational cost. As VOC concentrations are reduced
at the initial well groups, other SVE wells can be incorporated into the
operating system.
• SVE System Optimization - The goal of SVE system optimization is to
maximize the VOC concentrations in the extracted soil gas. System operation
will be optimized by evaluating monitoring data from individual SVE wells and
adjusting air flow such that VOC concentrations in the combined effluent are
maximized. VOC concentrations from individual wells and the combined
effluent will be monitored using field instruments and through laboratory
analysis of vapor samples. It is expected that VOC concentrations will be
sharply reduced during the first several weeks or months of operation, followed
by smaller reductions over a longer time period. As extracted VOC
concentrations approach asymptotic conditions, the SVE system will be
operated in a pulsed mode. During the off-cycle of pulsed mode operation,
VOC concentrations "rebound" to a somewhat higher equilibrium concentration
due to mass transfer from soil and soil moisture and diffusion from lower
permeability zones. After equilibrium conditions are reestablished
(approximately 30 days), the system is energized and operated until asymptotic
conditions are reached again. This process is generally repeated until the
"rebound effect" has been reduced.
7.2.4 Development of Soil Gas Concentration Threshold Values
Soil gas threshold concentrations represent contamination levels that have the potential to
contaminate groundwater above the MCLs. Threshold concentrations are used as
remedial action objectives for the vadose zone. Achievement of the soil gas
concentration thresholds is a conservative means of demonstrating and ensuring
compliance with the MCLs. Soil gas threshold concentrations are based on the following
criteria:
• soil gas extending to the saturated zone,
• a 40-foot groundwater mixing zone,
• Henry's law equilibrium conditions between soil gas and infiltrating soil
moisture, and
• using MCL concentrations to define contaminated groundwater.
page 7-14 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
-------
Date: 09/24/97
Section? Description of Alternatives
Aquifer Mixing Zone Calculations
To calculate vadose zone mass loading of VOCs to groundwater, a mixing-zone thickness
must be assumed or acquired from analytical and geologic data. Stratigraphic data from
soil borings, CPT, HydroPunch, and monitoring wells at Site 24 suggest a continuous
aquifer mixing zone approximately 40 feet thick beneath and downgradient of the
primary source area at Site 24. Analytical data from groundwater samples taken from
HydroPunch points and groundwater monitoring wells underneath and downgradient of
Buildings 296 and 297 indicate that this 40-foot interval is relatively homogeneous
(within one order of magnitude) with respect to dissolved TCE concentrations in
groundwater samples.
The following assumptions were made in performing the aquifer mixing-zone
calculations:
• homogenous and isotropic conditions in the vadose and saturated zones,
• instantaneous mixing,
• aquifer mixing-zone thickness of 40 feet,
• 400-foot-wide cross section for the mixing zone,
• linear groundwater velocity of 200 feet per year,
• no TCE partitioning to soil or aquifer material,
• infiltration rate of 1 foot per year,
• infiltration area of 160,000 square feet,
• porosity of 28 percent in the vadose zone, and
• porosity of 22 percent in the saturated zone.
These assumptions were developed based on site-specific data when possible (BNI
1997a). Site-specific data included mixing-zone thickness and porosity. When site-
specific data were not available, conservative values were used that tend to overestimate
VOC transport to groundwater. This model assumes a 1-foot-per-year infiltration, which
is a conservative value based on the average regional.rainfalLof 1 foot per year and the
estimated volume of wastewater for an industrial facility. Conservative transport of
VOCs (no partitioning to soil) also overestimates VOC loading to groundwater.
These calculations provide an estimated ratio of the volume of groundwater flowing
through a given area to the volume of recharge that the aquifer receives from the vadose
zone over the defined area. As clean groundwater flows into the contaminated interval, it
will dilute the volume of contaminated recharge that the aquifer receives from the vadose
zone. The calculation is summarized in Table 7-3.
Henry's Law Calculations
Henry's law was used to convert soil gas concentrations to equilibrium VOC
concentrations in the infiltrating water.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 7-15
9/1*97
-------
Date: 09/24/97
Section 7 Description of Alternatives
Table 7-3
Mixing-Zone Calculations
Advection Rate* Ground water Volume'
(0.008 ft/ft" x (per year) Recharge Volumer
15 ft/dayc/0.22) x 365 200 ft/yr x 40 ft x 1.0 ft/yr x 400 ft x 400 ft x
day/yrd 400 ft x 0.22 0.28
200 ft/)/ 704,000 ftVyr* 44,800 ft3/yr
Mixing-Zone Ratio8:
704,0007
44,800
15.7 to 1
Notes:
* groundwater flow equation;
average linear velocity = (hydraulic head x hydraulic conductivity)/porosity
" ft/ft - feet per foot ,
c ft/day - feet per day
d day/yr - days per year
* volume of groundwater that passes through the aquifer in 1 year =
advection rate x height x area x porosity
' recharge volume = infiltration rate x height x area x porosity
1 mixing-zone ratio = groundwater volume/recharge volume)
h ft/yr - feet per year
1 ft3/yr - cubic feet per year
For dilute solutions, an equilibrium soil vapor concentration can be calculated using a
concentration of a VOC dissolved in a liquid using Henry's law. The reverse is also
correct. Using the dimensionless form of Henry's constant, the calculation is shown as:
ffd-CSC,
where:
Hd = dimensionless Henry's constant
Ca = vapor concentration
Ci = solute concentration
*•'
Henry's law was used to calculate equilibrium VOC concentrations in infiltrating water
based on VOC concentrations in soil gas. This defines the potential for vadose zone
contamination to impact groundwater above MCLs. A concentration threshold value is
calculated for soil gas that would cause infiltrating water to load groundwater above the
MCL level. The concentration threshold for soil gas is calculated by multiplying the
U.S. EPA MCL (by VOC species) by a rounded mixing-zone ratio (15) and the Henry's
constant. The results are shown in Table 7-4. These calculations assume equilibrium
conditions exist between phases.
7.2.5 Monitoring
The SVE system will be operated continuously at the start of remediation and optimized
based on monitoring data to maximize the extracted VOC concentrations. When VOC
concentrations approach asymptotic conditions, the system should be operated in a pulsed
page 7-16 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
9/18/97 4:37 PM/nm tH»ort_p~1V*>ortsVte135Vwft»te24>dMirMAOTnie2ttiloc
-------
Date: 09/24/97
Section 7 Description of Alternatives
Table 7-4
Vadose Zone Concentration Threshold Calculations
voc*
Species
Trichloroethene
Tetrachloroethene
Carbon tetrachloride
1,1-dichloroethene
Freon 1 13
U.S. EPA
MCLb
djr-1V^)arMelo135ta«ite2«dRft«Aa700162h.doc
page 7-17
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Date: 09/24/97
Section? Description of Alternatives
This page left blank intentionally
page 7-18 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
»ie/97 4:3
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Date: 09/24/97
Section 8
SUMMARY OF THE COMPARATIVE ANALYSIS OF
ALTERNATIVES
This section summarizes the comparative analysis that was conducted to evaluate the relative
performance of each remedial alternative in relation to the nine evaluation criteria outlined in
CERCLA Section 121(b), as amended. The purpose of the comparative analysis is to identify the
relative advantages and disadvantages of each alternative. The evaluation criteria that follow are
based on requirements promulgated in the NCP:
• Overall Protection of Human Health and the Environment
• Compliance with ARARs
• Long-Term Effectiveness and Permanence
• Reduction of Toxicity, Mobility, or Volume
• Short-Term Effectiveness
• Implementability
• Cost
• State Acceptance
• Community Acceptance
8.1 OVERALL PROTECTION OF HUMAN HEALTH AND THE
ENVIRONMENT
Alternative 1 (no action) would not substantially alter the current or potential future risks
to human health or the environment. Although the human-health risk assessment
performed as part of the Phase II RI indicated that there was an insignificant risk of
exposure to the VOCs in the top 10 feet of soil at Site 24, their persistence at greater
depths in the subsurface contributes to the continued contamination of groundwater
below the site (BNI 1997a). The excess upper-bound cancer risk presented by exposure
to VOCs in the groundwater based on a residential exposure scenario was on the order of
1 in 1,000 (1 x 10"3). The human-health risk assessment also indicated that the VOC
concentrations in groundwater of the shallow groundwater unit were high enough to
potentially cause noncarcinogenic effects to receptors.
Alternative 1 would not reduce these risks significantly, nor would it reduce the potential
for further migration of VOCs from the shallow groundwater unit to the principal aquifer
and, thus, would not provide for the protection of human health or the environment.
Alternative 1 is not considered to be an effective solution for environmental problems at
Site 24.
Alternative 2 (SVE) would not reduce the current risks at the site. However,
Alternative 2 would reduce potential future risks by minimizing or preventing future
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 8-1
oana/97 4:38 PM urn fctannt_p-1V«partMelo13S«redVito24V«tfraft970016adae
-------
Date: 09/24/97
Section 8 Summary of the Comparative Analysis of Alternatives
contamination of groundwater beneath the site. Alternative 2 is therefore considered
protective of human health and the environment.
8.2 COMPLIANCE WITH APPLICABLE OR RELEVANT AND
APPROPRIATE REQUIREMENTS
Pursuant to Section 121(d)(l) of CERCLA (42 United States Code [USC] Section
962 l[d]), remedial actions must attain a degree of cleanup that assures protection of
human health and the environment. Additionally, remedial actions that leave hazardous
substances, pollutants, or contaminants on-site must meet standards, requirements,
limitations, or criteria that are ARARs. Federal ARARs for any site may include
requirements under any federal environmental laws. State ARARs include promulgated
requirements under state environmental or facility-siting laws that are more stringent than
any federal ARARs and that have been identified by the state in a timely manner.
CERCLA Section 121 states that, at the completion of a remedial action, a level or
standard of control required by an ARAR will be attained for wastes that remain on-site.
In addition, the NCP, 40 CFR Section 300.435(b)(2), requires compliance with ARARs
during the course of the remedial design/remedial action. ARARs are only triggered
when a remedial action is taken. Therefore, an ARAR discussion is not necessary for the
no action alternative. Alternative 2 complies with all ARARs for Site 24 soils as
discussed in Section 10 of this document.
8.3 LONG-TERM EFFECTIVENESS AND PERMANENCE
Alternative 1 would have little long-term effectiveness at reducing risk associated with
VOC contamination in the groundwater or lessening VOC migration from the vadose
zone to groundwater.
Alternative 2 uses SVE to reduce the VOC concentrations in soil to a level below that
which would contaminate groundwater above the MCLs. Monitoring and periodic
reviews would be used to assure the effectiveness of the remedial action. Monitoring
would continue until remediation of soil is complete and would also be performed at the
completion of groundwater remediation to ensure that the soil has not been
recontaminated from VOCs in groundwater. Successful implementation of this
alternative would accomplish the remedial action objectives and, thus, be protective of
human health and the environment.
SVE provides long-term protection by reducing VOC concentrations in the vadose zone,
thereby preventing further groundwater contamination. Removal of VOCs is permanent;
these contaminants are captured by VGAC and destroyed when the carbon is regenerated.
Approximately 6,000 pounds of TCE are estimated to be in the vadose zone at Site 24.
By removing VOCs from the vadose zone before they migrate to groundwater, SVE is
expected to shorten the time required for groundwater remediation.
page 8-2 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
urn tt«cnf_p-1V«portrtcto13SVDd)*il*24yminal\9700162idoc
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Date: 09/24/97
Section 8 Summary of the Comparative Analysis of Alternatives
8.4 REDUCTION OF TOXICITY, MOBILITY, OR VOLUME
Alternative 1 does not provide a reduction of toxicity, mobility, or volume through
treatment.
Alternative 2 does provide a reduction in toxicity, mobility, and volume. SVE is a well-
demonstrated remedial technology with permanent, long-term effectiveness for removing
VOCs from the vadose zone. VOCs are volatilized in the subsurface and removed by
vacuum-induced flow via SVE wells. The VOC-laden vapor stream is treated with
VGAC to meet discharge requirements. During this treatment, the VOCs are temporarily
transferred to the carbon. Once the VGAC capacity has been attained, the activated
carbon is removed and transported off-site to a regeneration facility where the VOCs are
desorbed and thermally destroyed.
Some residual risk may remain as the result of VOCs retained in the vadose zone in low-
permeability zones or stagnant zones (i.e., zones in which the SVE wells do not induce
advective flow). Removal of VOCs from these zones may be limited by molecular
diffusion of the VOCs to the advective flow zones. The potential for stagnant zones to
develop can be reduced through SVE well design and layout SVE well screen intervals
can be designed to isolate low-permeability layers and allow remediation efforts to focus
on specific vertical intervals. Overlapping of SVE well radii of influence and cycling
their period of operation can also reduce the potential for stagnant zones to develop.
8.5 SHORT-TERM EFFECTIVENESS
The no action alternative does not entail any on-site remedial activities and, therefore,
would not have any impacts on the surrounding community, workers, or the environment.
The time required for the alternative to be protective of human health and the
environment is controlled by the rate of natural attenuation processes.
Short-term impacts associated with the implementation of Alternative 2 include the
increased risk of exposure to workers associated with the handling of contaminated soils
and vapors. An additional short-term impact associated with Alternative 2 is the risk of
vehicular accidents and releases during transport of contaminated VGAC. Potential on-
site exposures and risks from these activities would be controlled through use of personal
protective equipment, monitoring, and conformance with a site-specific health and safety
plan. Transport risks would be minimized to the extent feasible by using a licensed
commercial hauler. Impacts to the surrounding community or the environment are
expected to be negligible because any inadvertent releases to the atmosphere would be
diluted before reaching the closest communities.
The time to reduce average VOC concentrations in soil gas to levels established as
remediation goals is highly dependent on the subsurface conditions (e.g., lithologies and
air permeability). A preliminary estimate of the time required to meet cleanup goals is
approximately 2 to 4 years; however, a more precise estimate can be made after the initial
SVE system performance is analyzed.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Tore page 8-3
0*1097 4:38 PM Mm t
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Date: 09/24/97
Section 8 Summary of the Comparative Analysis of Alternatives
8.6 IMPLEMENTABILITY
Alternative 1 would be the most easily implemented alternative from a technical
perspective, since it would involve no on-site construction or other remedial activities.
However, the administrative feasibility of this alternative is low, given the potential
opposition to a no action scenario.
Implementation of Alternative 2 would include the construction of an SVE system;
additional SVE wells; a vapor-conveyance system; a treatment system; and operation,
maintenance, and performance monitoring. Construction and operation of this system
entails standard, proven practices known to be readily implementable. Difficulties
regarding feasibility, availability of equipment and services, or schedule are not
anticipated.
8.7 COST
There are no costs associated with Alternative 1.
The cost estimate for Alternative 2 was developed using the Remedial Action Cost
Engineering Requirements (RACER) system developed by the U.S. Air Force. RACER
cost models are based on generic engineering solutions for environmental projects,
technologies, and processes. These solutions are derived from historical project
information, government laboratories, construction management agencies, vendors,
contractors, and engineering analysis. RACER cost estimates are made site specific
through modifications of the geographic and project-specific factors. The estimated net
present-worth cost for this remedial action is approximately $4.9 million in 1996 dollars.
This includes capital costs of approximately $1.1 million, operations and maintenance
costs of approximately $2.5 million, and monitoring costs of approximately $1.3 million.
Cost-estimating details, including assumptions and RACER input parameters, are
provided in Appendix D of the Site 24 FS report.
8.8 STATE ACCEPTANCE
DTSC and the RWQCB have reviewed the Site 24 RI/FS reports and the Proposed Plan
and concur with the selected remedy for remediation of the vadose zone source area.
8.9 COMMUNITY ACCEPTANCE
The Proposed Plan has been presented to the community and discussed at a public
meeting. The responsiveness summary portion of this ROD addresses the public's
comments and concerns about the selected remedy for the site.
page 8-4 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
0*18(87 4:38 PM
-------
Date: 09/24/97
Section 9
SELECTED REMEDY
Based on the Site 24 RI/FS reports and the administrative record for the site, as well as an
evaluation of comments submitted by interested parties during the public comment period, DON
has selected Alternative 2 as the remedy for remediation of the vadose zone at Site 24. The
selected alternative includes the following components:
• construction, operation, and maintenance of an SVE system to remove TCE and
other VOCs from the soil,
• performance monitoring throughout the predicted 2 to 4 years of remediation,
• treatment of VOC-contaminated soil gas (vapors) with activated carbon filters to
meet air quality standards prior to discharge to the atmosphere,
• confirmatory soil gas sampling at the end of vadose zone remediation to confirm that
average VOC concentrations are too low to contaminate groundwater above the
MCLs, and
• the vadose zone will be resampled at the conclusion of groundwater remediation. If
the average soil gas concentrations are found to be above the threshold limits,
additional vadose zone remediation may be necessary.
Since the risk assessment showed that soils present from 0 to 10 feet bgs do not present an
unacceptable risk to human health and the environment and remediation of deeper subsurface soil
will eliminate the threat of future contamination of groundwater above the MCLs, it will not be
necessary to review the site conditions every 5 years.
The selected alternative is believed to provide the best balance of trade-offs among the
alternatives with respect to the evaluation criteria. Based on the information available at this
time, DON believes the preferred alternative offers:
• a high level of performance when assessed against the following NCP evaluation
criteria: short-term effectiveness, long-term effectiveness and permanence,
implementability, compliance with ARARs, and overall protection of human health
and the environment; and
• a cost-effective means of accomplishing the remedial action objectives for the site.
Table 9-1 summarizes the cost estimate for the selected alternative. The cost estimate includes
capital costs and operation and maintenance (O&M) costs assumed to extend for a period of 2 to
4 years. The 2- to 4-year time frame does not necessarily reflect the duration of the O&M
activities at the site; the discontinuation or prolongation of O&M activities will be determined
based on the results of sampling designed to evaluate the effectiveness of remediation.
Other advantages of the selected remedy include its ease of implementation (it uses readily
available, proven technologies to extract and treat vapors), its compatibility with existing and
future land uses, and its inclusion of provisions for future assessments at the conclusion of
groundwater remediation. The existing infrastructure at the site should not be affected by the
implementation of Alternative 2.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 9-1
09M8/S7 4:38 PM Mm tWort_p-1V»po«1»te»13Sro*»it»2
-------
Date: 09/24/97
Section 9 Selected Remedy
Some modifications to the selected remedy (e.g., depth and spacing of wells) may be necessary
as a result of the remedial design and construction processes. Detailed design specifications,
performance evaluations, and schedule will be determined during the remedial design phase.
Table 9-1
Alternative 2 Cost Estimate Summary
Cost Category
Direct Costs, SVE" System
Equipment and wells
Vapor-phase activated carbon
Professional labor
Subtotal Direct Costs
Indirect Costs
Remedial Design*
Escalation'
Contingency*1
Total SVE System'
Capital Costs
$262,000
164,000
26,000
$452,000.
272,000
50,000
91,000
173,000
$1,038,000
Annual Operation, Maintenance,
and Monitoring Costs
$274,000
451,000
$725,000
178,000
124,000
205,000
$1,232,000
Cost Category
Direct Costs
Indirect Costs
Escalation"
Contingency*1
Total SVE Monitoring
Monitoring Costs
(first year)
$525,000
137,000
91,000
150,000
$903,000
Monitoring Costs
(subsequent years)
$127,000
40,000
27,000
39,000
$233,000
Notes:
' SVE - soil vapor extraction
" remedial design represents approximately 7 percent of direct and indirect costs
c escalation modifies the costs in the RACER database from January 1992 to the midpoint of the
project assumed to be October 1996 for capital costs and July 1997 for operation and
maintenance costs
d a 20 percent contingency has been added to cover cost increases that may occur as a result of
unforeseen conditions that typically occur on remediation projects
* total does not include annual monitoring costs presented below
page 9-2
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
OantlST 4:38 PM urn t¥Knt_p-1V«pO(tik>o139fDc
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Date: 09/24/97
Section 10
STATUTORY DETERMINATIONS
Under CERCLA, DON's primary responsibility is to undertake remedial actions that achieve
adequate protection of human health and the environment. In addition, section 121 of CERCLA
.establishes several other statutory requirements and preferences. These specify that when
complete, the selected remedial action must comply with ARARs established under federal and
state laws unless a statutory waiver is justified. The selected remedy also must be cost-effective
and use permanent solutions and alternative treatment technologies to the maximum extent
practicable. Finally, the statute includes a preference for remedies that, as their principal
element, permanently and significantly reduce the volume, toxicity, or mobility of hazardous
waste. The following sections discuss how the selected remedy meets these statutory
requirements and preferences. Complete discussions are found in the FS reports for soil and
groundwater at Site 24 (BNI 1996c, 1997b)
10.1 PROTECTION OF HUMAN HEALTH AND THE ENVIRONMENT
Remedial action objectives for the site were concerned primarily with limiting future
migration and exposures to contaminated media at the site. The selected remedy protects
human health and the environment by assuring the continued isolation of the
contaminated media at the site. Currently, there are no exposure pathways to
contaminated media at the site. Potential future threats to human health include exposure
to contaminated groundwater; remediation of soils will prevent future contamination of
groundwater above MCLs. Remediation of contamination already existing in
groundwater will be addressed in a separate ROD. It will not be necessary to place deed
restrictions on the site to protect human health because the contaminated soils are not
close enough to the surface to present an unacceptable risk to human health. However,
deed restrictions will be required during remediation to prevent disturbance of monitoring
wells and SVE equipment. There are no short-term threats associated with the selected
remedy that cannot be readily controlled. In addition, no adverse cross-media impacts are
expected from the remedy. Groundwater remediation is expected to take longer than
remediation of soils. To assure that soils above groundwater are not recontaminated in
the interim between remediation of the vadose zone and groundwater, the vadose zone
will be resampled at the conclusion of groundwater remediation. If average soil gas
concentrations are found to be above the threshold limits, additional vadose zone
remediation may be necessary.
10.2 COMPLIANCE WITH ARARs
The selected remedy will comply with the substantive portions of all ARARs. Section
121(e) of CERCLA, USC Section 962 l(e), states that no federal, state, or local permit is
required for remedial actions conducted entirely on-site. Therefore, actions conducted
entirely on-site must meet only the substantive, not the administrative, requirements of
the ARAR. Any action that takes place off-site is subject to the full requirements of the
federal, state, and local regulations. The chemical-, location-, and action-specific ARARs
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 10-1
09/23/97 7:19 AM urn !:Vvord_p-1V^iortxVao135kolUila24URflnan9700162)i.doc
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Date: 09/24/97
Section 10 Statutory Determinations
for the selected remedy for Site 24 are presented in Tables 10-1, 10-2, and 10-3.
respectively, and discussed below.
10.2.1 Chemical-Specific ARARs
Chemical-specific ARARs are health- or risk-based numerical values or methodologies
that, when applied to site-specific conditions, establish the acceptable amount or
concentration of a chemical that may be found in, or discharged to, the ambient
environment. If a chemical has more than one cleanup level, the most stringent level will
be identified as an ARAR for this remedial action. The selected remedial action can be
implemented to comply with chemical-specific ARARs.
The federal law that gives rise to potential chemical-specific ARARs is RCRA.
California state requirements considered as part of the ARARs analysis include the State
Water Resources Control Board (SWRCB) Resolutions 68-16 and 92-49 and Title 23
CCR.
10.2.1.1 ARARS FOR VADOSE ZONE REMEDIATION
General
The DON has determined that the substantive provisions of Title 22 CCR Section
66264.94(a)(l), (a)(3), (c), (d), and (e) constitute "relevant and appropriate" federal
ARARs for groundwater and vadose zone (i.e., the unsaturated zone) contamination
associated with Site 24. The substantive provisions of Title 22 CCR 66264.94 are
considered to be relevant and appropriate for this remedial action and are federal ARARs
because this requirement was approved by the EPA in its 23 July 1992 authorization of
the State of California's RCRA program and is federally enforceable. The State of
California disagrees with the DON. This regulation is a part of the State's authorized
hazardous waste control program. It is the State's position that the regulation is a state
ARAR and not a federal ARAR. See 55 Fed. Reg. 8765, March 8, 1990, and U.S. v.
State of Colorado, 990 F.2d 1565, (1993).
The DON and the State of California have not agreed whether State Water Resources
Control Board Resolution Nos. 92-49 and 68-16 are ARARs for the remedial action at
Site 24. Therefore, this Record of Decision documents each of the party's positions on
the resolutions, but does not attempt to resolve the issue.
DON'S Position Regarding SWRCB Resolution Nos. 68-16 and 92-49
The DON has determined that SWRCB Resolution Nos. 68-16 and 92-49 and 23 CCR
2550.4 do not constitute ARARs for this remedial action because they are state
requirements and are not more stringent than the federal ARAR provisions of 22 CCR
66264.94. The NCP set forth in 40 CFR 300.400(g) provides that only state standards
more stringent than federal standards may be ARARs (see also Section 121(d)(2)(A)(ii)
ofCERCLA).
page 10-2 OU-2A Draft Final Interim Record of Decision - Site 24. MCAS El Toro
09(23/97 7:19 AM urn ttwonl_p-1\raparWcto13S\rod\a**2«dMnaA9700162k.doc
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Table 10-1
Chemical-Specific ARARs* for Selected Remedy
Action/Requirement
Citation
ARAR
Determination
Comments
AIR
Resource Conservation and Recovery Actb
TCLP* regulatory levels; persistent and
bioaccumulative toxic substances TTLCsdand
STLCs'.
SOIL AND GROUND WATER
!
Groundwater and vadose zone protection
standards: Owners/operators of RCRA treatment,
storage, or disposal facilities must comply with
conditions in this section that are designed to
assure that hazardous constituents entering the
groundwater from a regulated unit do not exceed
the concentration limits for contaminants of
concern set forth under Section 66264.94 in the
uppermost aquifer underlying the waste
management area beyond the point of compliance.
SOIL
Cal-EPAj Department of Toxic Substances
Control
Definition of "non-RCRA hazardous waste."
FEDERAL
Title 22 CCRf,
6626l.24(a)
22 CCR 66264.94,
except
66264.94(a)(2), and
94(b)
STATE
22 CCR
6626l.22(a)(3)and
(4),6626l.24(aX2)to
(a)(8), 66261.IOI,
6626l.3(a)(2KC),or
6626l.3(a)(2)(F)
Applicable Using the RCRA8 definition of hazardous waste, there is
the potential for some of the spent carbon to exceed
TCLP limits for TCEh, making it a characteristic
hazardous waste. Generator requirements are applicable.
Relevant and Applicable for hazardous waste TSD1 facilities;
appropriate potentially relevant and appropriate in site-specific
circumstances, such as when the source of the waste is
unknown but the waste is similar in composition to listed
waste or when waste constituents -have released or have
the potential to release to groundwater. Because the
waste released from the vadose zone to the groundwater
in OU-2A, in particular TCE, is similar in composition to
listed waste, this requirement is determined to be relevant
and appropriate.
Applicable Soil removed during well construction is determined not
to be a listed waste, but may be a characteristic RCRA or
non-RCRA hazardous waste. Generator requirements are
applicable.
*
S
(table continues)
09/1M7 9:58 AM urn ttoor4_p-1V«po(ttfelo13SVio«lto2
-------
•§ Table 10-1 (continued)
9 Notes:
* ARAR - applicable or relevant and appropriate requirement
b Statutes and policies, and their citations, are provided as headings to identify general categories of potential applicable or relevant and
appropriate requirements (ARARs) for the convenience of the reader. Listing the statutes and policies does not indicate that the Department of
the Navy accepts the entire statutes or policies as potential ARARs. Specific potential ARARs are addressed in the table below each general
heading; only substantive requirements of the specific citations are considered potential ARARs.
c TCLP - toxicity characteristic leaching procedure
d TTLC - total threshold limit concentration
* STLC - soluble threshold limit concentration
' CCR - California Code of Regulations
9 RCRA - Resource Conservation and Recovery Act
h TCE-trichloroethene
' TSD - treatment, storage, and disposal
' Cal-EPA - California Environmental Protection Agency
Chemical-specific concentrations used for Feasibility Study evaluation may not be ARARs indicated in this table, but may be concentrations
based upon other factors. Such factors may include the following:
Human health risk-based concentrations (40 Code of Federal Regulations [CFR] 300.430[e][A][1] and [2])
Ecological risk-based concentrations (40 CFR 300.430 [e][G])
Practical quantitation limits of contaminants (40 CFR 300.430[e][A][3])
Many potential action-specific ARARs contain chemical-specific limitations and are addressed in the action-specific ARAR tables.
19:58 AM urn tteord^i<-1\raparWcla135kD«(te24VffirwRUb101.doe
-------
Table 10-2
Location-Specific ARARs* for Selected Remedy
Location/Requirement
Citation
ARAR
Determination
Comments
FEDERAL
Hazardous Waste Control Act6
Facility within 100-year floodplain must be
designed, constructed, operated, and maintained to
avoid washout.
Executive Order 11988, Protection of
Floodplains
Actions taken within a floodplain should avoid
adverse effects, minimize potential harm, and
restore and preserve natural and beneficial values.
22 CCRe
66264.18(b)
40CFRe6,
Appendix A; excluding
Sections 6(aX2),
6(a)(4),6(a)(6);
40 CFR 6.302
Applicable This requirement is applicable because some SVE wells
will be located within the 100-year floodplain.
Applicable As indicated previously, this requirement is applicable
because some of the proposed SVE wells will be located
within the floodplain.
Sources:
BN11997
FEMA 1989
Jacobs Engineering 1992,1993a
Notes:
•
ARAR - applicable or relevant and appropriate requirement
Statutes and policies, and their citations, are provided as headings to identify general categories of potential applicable or relevant and
appropriate requirements for the convenience of the reader. Listing the statutes and policies does not indicate that the Department of the
Navy accepts the entire statutes or policies as potential applicable or relevant and appropriate requirements. Specific potential applicable or
relevant and appropriate requirements are addressed in the table below each general heading; only substantive requirements of the specific
citations are considered potential applicable or relevant and appropriate requirements.
CCR - California Code of Regulations
SVE - soil vapor extraction
CFR - Code of Federal Regulations
-------
(Q
(D
Table 10-3
Action-Specific ARARs" for Selected Remedy
Action/Requirement
Citation
ARAR
Determination
Comments
FEDERAL
Resource Conservation and Recovery Act, 42 USCb
690!etseq.c
Person who generates waste shall determine if that 22 CCRd 66262.10(a). Applicable
waste is a hazardous waste. 66262.11
Pre-Transport Requirements
Hazardous waste must be packaged in accordance
with DOT* regulations prior to transporting.
22 CCR 66262.30
Applicable
Hazardous waste must be labeled in accordance with
DOT regulations prior to transporting.
22 CCR 66262.31
Applicable
Provides requirements for marking hazardous waste
prior to transporting.
22 CCR 66262.32
Applicable
Applicable for any operation where waste is generated.
The determination of whether wastes generated during
remedial activities, such as soil cutting from well
installation and treatment residues, are hazardous will
be made at the time the wastes are generated.
Applicable for any operation where waste is generated
and transported. The determination of whether wastes
generated during remedial activities, such as soil cutting
from well installation at treatment residues, are
hazardous will be made at the time the wastes are
generated.
Applicable for any operation where waste is generated
and transported. The determination of whether wastes
generated during remedial activities, such as soiicutting
from well installation at treatment residues, are
hazardous will be made at the time the wastes are
generated.
Applicable for any operation where waste is generated
and transported. The determination of whether wastes
generated during remedial activities, such as soil cutting
from well installation at treatment residues, are
hazardous will be made at the time the wastes are
generated.
(table continues)
• 10:03 AM URil:t»rard_p-1Vt|VXU\eia135tadWto2«dRrraMib103ik)C
-------
Table 10-3 (continued)
Action/Requirement
Citation
ARAR
Determination
Comments
A generator must ensure that the transport vehicle is
correctly placarded prior to transport of hazardous
waste.
Establishes requirements for a generator to
accumulate hazardous waste on-site for 90 days or
less without a permit or grant of interim status.
Clean Air Act 40, USC 7401 et seq.
Regulates discharge to air. Addresses major sources
of air pollutants.
All new sources of air pollution that may result in a
net emission increase of any nonattainment air
contaminant or any halogenated hydrocarbons are to
employ BACT*.
22 CCR 66262.33
Applicable
22 CCR 66262.34
Applicable
40 USC Section 7410; Applicable
portions of 40 CFRf
Section 52.220
applicable to
SCAQMD*
SCAQMD Rule 1303 Applicable
Applicable for any operation where waste is generated
and transported. The determination of whether wastes
generated during remedial activities, such as soil cutting
from well installation at treatment residues, are
hazardous will be made at the time the wastes are
generated.
Applicable for any operation where waste is generated
and transported. The determination of whether wastes
generated during remedial activities, such as soil cutting
from well installation at treatment residues, are
hazardous will be made at the time the wastes are
generated.
Applicable for emissions from SVEh system.
Applicable to emissions from SVE system. Current
SCAQMD policy requires BACT only when the net
emissions increase exceeds 1 pound per day of any
nonattainment air contaminant for a given unit. The
SCAQMD BACT guidelines generally require the use
of a carbon absorber as BACT to control off-gas.
Treatment facilities will be equipped with carbon
absorbers
o>
s
(table continues)
0*1*97 10:03 AM Mm l:\wonjj>-1V»portt\cto135Vo*f^«VWr>«N*b103 doc
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Table 10-3 (continued)
(Q
oo
Action/Requirement
Citation
ARAR
Determination
Comments
South Coast Air Quality Management District
Applies to stationary source, constructed or modified
after effective date of requirement, that emits
carcinogenic air contaminants.
Requires that T-BACT* be employed for new
stationary equipment when the operation of that
equipment results in a higher than allowable
maximum individual cancer risk.
STATE
SCAQMDRule I40I Applicable
Requires that applicant demonstrate that the cumulative
impact of emissions from new or modified source and
all other permitted units within 100 meters owned or
operated by the applicant are below a maximum
individual cancer risk of 10"*. T-BACT is required if
maximum individual cancer risk exceeds this limit.
Off-gas control for SVE discharge is to be below the
10* threshold.
Notes:
ARAR - applicable or relevant and appropriate requirement
USC - United States Cods
Statutes and policies, and their citations, are provided as headings to identify general categories of potential applicable or relevant and
appropriate requirements. Specific potential applicable or relevant and appropriate requirements are addressed in the table below each
general heading.
CCR - California Code of Regulations
DOT - Department of Transportation
CFR - Code of Federal Regulations
SCAQMD - South Coast Air Quality Management District
SVE - soil vapor extraction
BACT - best available control technology
T-BACT - best available control technology - toxics
IftOS AM MII; tVward_p-1V*^oil«tGloiaSVad\«te24VJmn«M
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Date: 09/24/97
Section 10 Statutory Determinations
" The provisions of 22 CCR 66264.94 and 23 CCR 2550.4 that address groundwater and
vadose zone concentration limits are identical. Therefore, 23 CCR 2550.4 is not more
stringent than 22 CCR 66264.94 and its provisions are not state ARARs.
Section III.G of SWRCB Resolution No. 92-49 provides in relevant part that regional
boards shall "..., in approving any alternative cleanup levels less stringent than
background, apply Section 2550.4..." Because this resolution incorporates and relies
upon the provisions of 23 CCR 2550.4, which are not more stringent than 22 CCR
66264.94, SWRCB Resolution No. 92-49 is also not more stringent and, hence, its
provisions are not state ARARs.
The DON has determined that further migration of VOCs through the vadose zone and
groundwater is not a discharge governed by the language in SWRCB Resolution
No. 68-16. More specifically, the language of SWRCB Resolution No. 68-16 indicates
that it is prospective in intent, applying to new discharges in order to maintain existing
high-quality waters. It is not intended to apply to restoration of waters that have already
been degraded. However, the DON has applied the principles of SWRCB Resolution
No. 68-16 through its interpretation of 22 CCR 66264.94 in a manner consistent with
SWRCB Resolution No. 92-49.
State of California's Position Regarding SWRCB Resolution Nos. 68-16 and 92-49
The State of California disagrees with DON's assertion that SWRCB Resolution Nos. 68-
16 and 92-49 are not ARARs and believes that both resolutions are applicable
requirements for the remedial action. However, the State does not intend to dispute the
ROD. See below.
Relationship between Groundwater and Vadose Zone
In the Draft OU-1 Interim Action FS (IAFS) report, the DON addressed the issue of
whether cleanup of groundwater to background was technologically or economically
feasible (JEG 1995, Appendix H). The DON concluded that achieving background levels
of constituents is not technologically or economically feasible consistent with the
requirements of 22 CCR 66264.94, 23 CCR 2550.4, and SWRCB Resolution Nos. 68-16
and 92-49 and federal MCLs were identified as the controlling cleanup
level/concentration limits. Federal MCLs were deemed to be adequately protective of
human health and the environment The FFA signatories agreed on and approved this
conclusion in the IAFS report. The DON hereby adopts this determination for this ROD.
The Phase II RI for Site 24 estimated the soil gas concentration thresholds above which
VOCs in soil (listed in Table 7-4) were capable of contaminating groundwater above their
respective MCLs (Table 7-4). These values represent soil gas cleanup objectives and are
designed to ensure that groundwater at the point of compliance (POC) is not
contaminated above the MCLs for VOCs. See Title 22 CCR Section 7 66264.94, Title 23
CCR Section 2550.5, and the NCP preamble at 55 Fed. Reg. 8753, March 8,1990.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 10-9
09O3I97 7:19 AM urn t>worOj>-1V»portjVao13aroA»*«2
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Date: 09/24/97
Section 10 Statutory Determinations
The threshold concentrations shown in Table 7-4 are consistent with the groundwater and
vadose zone requirements of Title 22 CCR Section 66264.94, Title 23 CCR Section
2550.4, SWRCB Resolution No. 92-49, and SWRCB Resolution No. 68-16.
Achievement of the threshold concentrations is a conservative means of demonstrating
and ensuring compliance with the MCL at the POC because the. threshold concentrations
are designed to prevent groundwater just outside the mixing zone from exceeding MCLs.
Groundwater concentrations at the POC would be expected to be lower because of natural
attenuation, primarily due to diffusion and dispersion.
The Regional Water Quality Control Board does not agree that the method and criteria
used for determining "threshold concentrations" for shutofF of the SVE system complies
with State Water Resources Control Board Resolution No. 92-49 or with Title 23,
California Code of Regulations, Section 2550.4 or Title 22, California Code of
Regulations, Section 66264.94. It is the Board's position that the use of a 40-foot mixing
zone and a POC in the ground water and other assumptions used in setting "threshold
concentrations" will not necessarily result in cleanup of the vadose zone to the extent
technically and economically achievable and at least to a level that assures that
contaminants will not discharge into ground water at levels greater than the aquifer
cleanup levels for the underlying ground water. However, the Marine Corps has agreed
to reevaluate the shutoff criteria in the final ROD for Site 24. Therefore, the Regional
Water Quality Control Board will not dispute this Interim ROD.
10.2.1.2 CHARACTERIZATION OF WASTES
Federal arid state requirements for characterizing wastes generated during implementation
of the remedial action will be applicable (Table 10-1). Using the RCRA or state
definitions of hazardous waste, drill cuttings and contaminated personal protective
equipment generated from the implementation of the remedial action are not anticipated
to be classified as RCRA or non-RCRA hazardous waste. Wastes generated from
treatment of VOCs (e.g., spent carbon) may be classified as hazardous if they exceed the
criteria for toxicity. Waste generated from the remedial action will be tested at the time it
is generated to determine the waste classification prior to storage and/or disposal.
Some of the soil cuttings and/or the spent activated carbon may not be classified as
federal hazardous waste but could be classified as a California-regulated non-RCRA
hazardous waste. The material would then have to be managed according to California
hazardous waste management regulations and disposed in a Class I landfill. Spent
activated carbon that is regenerated off-site may also have to be managed according to
California hazardous waste management regulations.
10.2.2 Location-Specific ARARs
Location-specific ARARs are restrictions on the concentrations of hazardous substances
or on the conduct of activities solely because they are in specific locations. Special
locations include floodplains, wetlands, historic places, and sensitive ecosystems or
page 10-10 OU-2A Draft Final Interim Record of Decision - Site 24. MCAS El Toro
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Date: 09/24/97
Section 10 Statutory Determinations
habitats. The selected remedial action can be implemented to comply with location-
specific ARARs.
Some of the proposed SVE wells may be located within a 100-year floodplain.
Therefore, 22 CCR 66264.18(b) and substantive provisions of Executive Order 11988 are
applicable as shown in Table 10-2. Executive Order 11988 (Protection of Floodplains)
(40 CFR 6, Appendix A, excluding Sections 6[a][2], [4], and [6]; 40 CFR 6.302) requires
that actions taken within floodplains should avoid adverse effects, minimize potential
harm, and restore and preserve natural and beneficial values. None of the activities
planned should have adverse impacts on the floodplain.
The National Archaeological and Historical Preservation Act requires federally funded
projects to identify and mitigate the impacts of project activities on significant scientific,
prehistoric, historic, or archaeological data. No prehistoric or historic sites were
identified in existing data for the area that could be impacted by the remedial action. It is
planned that all SVE wells will be placed on Site 24. This site is currently heavily
disturbed. Therefore, Phase I archeological surveys are not required.
10.2.3 Action-Specific ARARs
Action-specific ARARs are technology- or activity-based requirements or limitations for
remedial activities. These requirements are triggered by the particular remedial activities
conducted at the site. The selected remedial action can be implemented to comply with
action-specific ARARs.
Federal laws that give rise to potential ARARs for actions to be undertaken as part of
Alternative 2 include the RCRA and the Clean Air Act (CAA). In addition, because
spent granular activated carbon from the liquid-phase or vapor-phase systems may
contain radon, U.S. EPA guidelines for disposal of drinking water treatment waste
containing naturally occurring radionuclides are also to be considered (TBC) for the
remedial action.
10.2.3.1 FEDERAL
RCRA
Waste steams created in the course of implementing the remedial action would be subject
to RCRA requirements for determining whether wastes would be classified as hazardous.
Hazardous waste determinations for the soil cuttings generated from the installation of the
monitoring wells and the spent carbon from the off-gas treatment would be made at the
time the waste is generated. If these wastes are determined to be hazardous, then the
appropriate requirements outlined in Table 10-3 for packaging, labeling, marking,
placarding, and accumulating these materials for final disposal would need to be
followed.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 10-11
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Date: 09/24/97
Section 10 Statutory Determinations
X —
Clean Air Act
Off-gas from SVE operation would need to comply with the air emissions requirements
of the SCAQMD. Requirements that have been incorporated in the State Implementation
Plan (SIP) and are therefore considered to be potential federal1 ARARs include Rules 212
and 1303. These requirements and their applicability to Alternative 2 are discussed
below.
Rule 212 is the Standard for Approving Permits. Its substantive requirements are listed
below.
• Equipment should be designed, controlled, or equipped with such air pollution
control equipment that it may be expected to operate without emitting air
contaminants in violation of the California Health and Safety Code (H&SC)
Sections 41700,41701, or 44300 (et seq.) or of the SCAQMD rules.
• Public notification is required for significant projects, defined as having any of
the following conditions:
- units are located within 1.000 feet of the fence line of a school;
- increase in on-site emissions of lead in excess of 3 pounds per day or the
daily maximums specified in Rule 1309. l(a);
- the emission of reactive organic gas (ROG) exceed 30 pounds per day; and
- the individual cancer risk equals or exceeds 1 in 1,000,000.
Based on preliminary conceptual design estimates, the SVE system, which uses VGAC
filters to remove VOCs and control TCE emissions, would not qualify as a significant
project; therefore, public notification would not be required and Rule 212 is not an
ARAR. In addition, public notification requirements are not ARARs because they are not
environmental standards of control.
SCAQMD Rule 1303 requires that all new sources of air pollution that result in a net
increase of any nonattainment air contamination or any halogenated hydrocarbons
employ the best available control technology (BACT). Current SCAQMD policy
(SCAQMD 1990) sets the threshold of net emissions increase at 1 pound per day of any
nonattainment air contaminant (including ROGs such as TCE) for any permitted unit
when BACT is required. Current SCAQMD guidelines do not establish BACT for the
SVE technology; however, SCAQMD guidelines list carbon adsorption as the BACT for
air strippers for groundwater treatment (SCAQMD 1990). It is currently planned to treat
VOCs from the SVE system utilizing VGAC filters and therefore the remediation should
comply with the intent of the BACT guidelines. Therefore, SCAQMD Rule 1303 is
applicable for the remedial action at Site 24.
U.S. EPA Guidelines for the Disposal of Water Treatment Plant Wastes
Radon has been detected in some off-Station wells, and there is the potential for it to
accumulate on the liquid-phase granular activated carbon (LGAC) used for removal of
page 10-12 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
O3O3ISI 7:19 AM Mm r.twonlj>-1\npon««ctBl3S\RXft«iU24Vftfiral\9700162k.<)i>c
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Date: 09/24/97
Section 10 Statutory Determinations
VOCs from residual liquid. The U.S. EPA Office of Drinking Water guidelines
(U.S. EPA 1990) provide TBC criteria for controlling worker exposure and managing
spent carbon. Also, since it is anticipated that the carbon will be regenerated off-site
(rather than disposed of in a landfill), additional restrictions on handling and transporting
of the material may need to be considered. Specifically, if the level of activity of the
spent carbon reaches 2,000 pCi/dry gram from the sum of all isotopes, then the material
would need to be manifested as a low-level radioactive waste per U.S. Department of
Transportation requirements (49 CFR 171-180).
10.2.3.2 STATE
California state requirements that are potential ARARs for actions to be undertaken as
part of Alternative 2 are described in the following subsections.
South Coast Air Quality Management District
The off-gas from the SVE treatment system needs to comply with SCAQMD
requirements for air emissions. Requirements that have not been incorporated in the SIP
and are therefore considered to be state ARARs include Rules 402 and 1401.
Rule 402. Rule 402 prohibits the discharge of any air emissions in quantities that may
cause injury, detriment, nuisance, or annoyance to the public. The DON has determined
that a "nuisance" condition as set forth in Rule 402 does not exist at Site 24 and is not
posed by the remedial alternatives. In addition, other federal and state ARARs
addressing actual and potential air emissions will assure adequate protection of human
health and the environment.
Rule 1401. Rule 1401 involves new source review of carcinogenic air contaminants. It
requires that an applicant substantiate that the cumulative impacts of emissions from new,
relocated, or modified permit units and from all other permit units located within 100
meters that are owned or operated by the applicant for which applications were submitted
on or after 01 June 1990 will not result in any %f the following:
a) a maximum individual cancer risk (MICR) of greater than 1 in 1,000,000
(1 x 10"6) at any receptor location, if the permit unit is constructed without
toxics using best available control technology-toxics (T-BACT);
b) an MICR of greater than 10 in 1,000,000 (1 x 10"5) at any receptor location, if
the permit unit is constructed with T-BACT; and
c) more than 0.5 excess cancer cases in the population that is subject to a risk of
greater than 1 in 1,000,000(1 x 10"6).
Furthermore, the MICR may not exceed 1/70 of the maximum allowable risk specified in
item a) or b), above, in any 1 year at receptor locations within residential areas.
Rule 1401 is applicable for the remedial action at Site 24 because the SVE units represent *
new stationary sources of emission. Rule 1401 specifies the risk assessment and
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 10-13
0*2*97 7:19 AM tarn t
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Date: 09/24/97
Section 10 Statutory Determinations
emission calculation procedures to be used in determining compliance with the
requirements. Currently, SCAQMD has no guidelines for what constitutes T-BACT;
instead, the T-BACT determination is made by the air quality engineer who is reviewing
the permit application.
MCAS El Toro does not own any other permitted units within 100 meters of the proposed
SVE locations. Based on preliminary conceptual design information, the VGAC unit will
be designed so that the MICR will be below the 1-in-1,000,000 threshold limit, and
therefore, would meet the requirements of Rule 1401.
10.3 COST-EFFECTIVENESS
The selected remedy has been determined to provide overall effectiveness proportional to
its costs; it is therefore considered cost-effective. The estimated net present-worth cost
for this remedial action is approximately $4.9 million. This includes capital costs of
approximately $1.1 million, O&M costs of approximately $2.5 million, and monitoring
costs of approximately $1.3 million. Technologies included in Alternative 2 are readily
implementable and have been widely used and demonstrated to be effective.
10.4 UTILIZATION OF PERMANENT SOLUTIONS AND ALTERNATIVE
TREATMENT TECHNOLOGIES (OR RESOURCE RECOVERY
TECHNOLOGIES) TO THE MAXIMUM EXTENT PRACTICABLE
DON and the State of California have determined that the selected remedy represents the
maximum extent practicable to which permanent solutions and alternative treatment
technologies can be used in a cost-effective manner at Site 24. This alternative is
protective of human health and the environment and complies with the ARARs for
Site 24. VOC contaminants within the vadose zone will be extracted and permanently
destroyed. Although some residual contamination may remain in the soils, the
concentration should not be high enough to contaminate groundwater above the MCLs.
Alternative 2 is readily implementable using standard equipment and methods.
Implementation is expected to take approximately 2 to 4 years. During implementation,
workers will use personal protective equipment and adhere to the site health and safety
plan to minimize exposure to soil cuttings and contaminated vapors. The cost of
Alternative 2, although higher than the cost of the no action alternative, represents the
lowest cost of an effective, permanent solution for soil remediation.
The most decisive factor in the selection of Alternative 2 is that use of SVE and VGAC
will permanently reduce the toxicity and volume of VOC contaminants and reduce future
contamination of groundwater above the MCLs.
page 10-14 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Date: 09/24/97
Section 10 Statutory Determinations
10.5 PREFERENCE FOR TREATMENT AS A PRINCIPAL ELEMENT
CERCLA Section I21(b) identifies a statutory preference for alternatives that utilize
treatment to reduce the toxicity, mobility, or volume of contamination. Alternative 2
complies with this requirement.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 10-15
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Date: 09/24/97
Section 10 Statutory Determinations
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Date: 09/24/97
Section 11
DOCUMENTATION OF SIGNIFICANT CHANGES
The Proposed Plan for Site 24 was released for public comment in April 1997. The Proposed
Plan identified Alternative 2, SVE, as the preferred alternative for the site. DON reviewed all
written and verbal comments submitted during the comment period. Upon review of these
comments, it was determined that no significant changes to the remedy, as it was originally
identified in the Proposed Plan, were necessary.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 11-1
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Date: 09/24/97
Section 11 Documentation of Significant Changes
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Date: 09/24/97
Section 12
REFERENCES
Bechtel National, Inc. 1995. Final Work Plan Phase I Remedial Investigation/Feasibility Study.
Marine Corps Air Station El Toro, CA.
. 1996a. Final Updated Community Relations Plan, Marine Corps Air Station El Toro,
CA.
—. 1996b. Draft Soil Vapor Extraction Pilot Test Report. Marine Corps Air Station
El Toro, CA.
—. 1996c. Draft Phase II Feasibility Study Report, Operable Unit 2A - Site 24. Marine
Corps Air Station El Toro, CA.
—. 1997a. Draft Final Phase II Remedial Investigation Report, Operable Unit 2A - Site 24.
Marine Corps Air Station El Toro, CA.
—. 1997b. Draft Final Phase II Feasibility Study Report, Operable Unit 2A - Site 24.
Marine Corps Air Station El Toro, CA.
-. 1997c. Base Realignment and Closure Cleanup Plan (BCP) for Marine Corps Air
Station El Toro, CA.
BNI. See Bechtel National, Inc.
Brown and Caldwell. 1986. Initial Assessment Study of Marine Corps Air Station El Toro,
California. CLE-C01-01F018-A2-016.
California Regional Water Quality Board, Santa Ana Region. 1995. Water Quality Control
Plan. Santa Ana River Basin (8).
DON. See United States Department of the Navy.
Federal Facilities Agreement. 1990. Federal Facility Agreements Between the U.S. Marine
Corps, EPA Region IX, California Department of Health Services, and State Water
Resources Control Board.
Federal Emergency Management Agency. 1989. Maps for Orange County. September.
FEMA. See Federal Emergency Management Agency.
FFA. See Federal Facilities Agreement.
Jacobs Engineering Group, Inc. 1992. RCRA Part B Permit Application, MCAS El Toro.
SWDIVNAVFAC. June.
. 1993a. Marine Corps Air Station El Toro: Installation Restoration Program Phase I
Remedial Investigation Draft Technical Memorandum.
. 1993b. Marine Corps Air Station El Toro: Installation Restoration Program Final
RCRA Facility Assessment Report.
r. 1994a. Marine Corps Air Station El Toro: Installation Restoration Program Draft
Remedial Investigation Report for Operable Unit 1. Irvine, CA.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 12-1
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Date: 09/24/97
Section 12 References
. 1994b. Marine Corps Air Station El Toro: Installation Restoration Program Remedial
Investigation/Feasibility Study draft Soil Gas Survey Technical Memorandum, Sites 24
and 25. Irvine, CA.
—: . 1994c. Interviews with active and retired personnel from MCAS El Toro, conducted by
Jacobs Engineering Group, Inc., CTO-284. Irvine, CA.
. 1995. Marine Corps Air Station El Toro, CA. Installation Restoration Program Draft
Operable Unit 1 Interim Action Feasibility Study.
James M. Montgomery Engineers, Inc. 1988. MCAS El Toro and Tustin Site Inspection Plan of
Action.
JEG. See Jacobs Engineering Group, Inc.
JMM. See James M. Montgomery Engineers, Inc.
Marine Corps Air Station El Toro. Local Redevelopment Authority. 1996. MCAS El Toro
Community Reuse Plan. August.
MCAS El Toro. See Marine Corps Air Station El Toro.
Mercer and Cohen. 1993. Dense Nonaqueous Phase Liquid (DNAPL) Site Evaluation. Library
of Congress.
Orange County Water District, Letter to Ms. Bonnie Arthur, Mr. Tayseer Mahmoud, and Mr.
Larry Vitale, dated 03 September 1996. Preliminary OCWD Comments on MCAS El
Toro OU-1 Draft Final RI/FS Report.
RWQCB. See California Regional Water Quality Control Board.
SCAQMD. See South Coast Air Quality Management District.
South Coast Air Quality Management District. 1990. Best Available Control Technology
Guidance.
*••
United States Department of the Navy. 1992. Navy/Marine Corps Installation Restoration
Manual.
U.S. Environmental Protection Agency. 1989. Risk Assessment Guidance for Superfund.
Volume 2. Environmental Evaluation Manual. Interim Final. EPA/540-1-89-001. U.S.
Environmental Protection Agency, Office of Emergency and Remedial Response,
Washington, D.C.
. 1990. Suggested Guidelines for the Disposal of Drinking Water Treatment Wastes
Containing Naturally Occurring Radionuclides. U.S. EPA Office of Drinking Water. July.
. 1992a. Guidance for Data Usability in Risk Assessment.
-. 1992b. Dermal Exposure Assessment: Principle and Applications Interim Report.
Office of Research and Development. EPA/600/8-91/01 IB.
—. 1993a, Presumptive Remedies: Policies and Procedures.
page 12-2 OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro
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Date: 09/24/97
Section 12 References
. 1993b. Presumptive Remedies: Site Characterization and Technology Selection for
CERCLA Sites with Volatile Organic Compounds in Soils. Office of Solid Waste and
Emergency Response.
—. 1994. Health Effects Assessment Summary Tables.
—. 1995a. Health Effects Assessment Summary Tables,
—. 1995b. Integrated Risk Information System.
U.S. EPA. See U.S. Environmental Protection Agency.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 12-3
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Section 12 References
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SUMMARY OF STATE ARARs RECEIVED IN
RESPONSE TO DTSC ARARs SOLICITATION
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Date: 09/24/97
SUMMARY OF STATE ARARs RECEIVED IN RESPONSE TO
DTSC ARARs SOLICITATION
As the lead state agency, the Cal-EPA DTSC, is primarily responsible for identification of
potential ARARs. In response to the DTSC's 01 May 1996 ARARs request letter, the DON
received input from the following agencies:
• Cal-EPA Water Resources Board (memorandum dated 03 June 1996);
• California Department of Fish and Game (memorandum dated 05 June 1996);
• California Department of Health Services (memorandum dated 23 May 1996);
• County Sanitation Districts of Orange County (letter dated 29 May 1995);
• SCAQMD (letter dated 31 May 1996);
• California Department of Transportation (letter dated 04 June 1996);
• Orange County Environmental Management Agency (letter dated 30 May 1996);
• Orange County Water District (letter dated 05 June 1996); and
• Regional Water Quality Control Board, Santa Ana Region (memorandum dated
05 June 1996).
DON reviewed all potential ARARs submitted by the agencies noted above, compared them with
federal ARARs, and reached a conclusion as to which are the most stringent and/or "controlling"
ARARs for each alternative.
OU-2A Draft Final Interim Record of Decision - Site 24, MCAS El Toro page 1
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Date: 09/24/97
Responsiveness Summary: State ARARs
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RESPONSIVENESS SUMMARY
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RESPONSES TO COMMENTS RECEIVED DURING
PUBLIC COMMENT PERIOD
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RESPONSIVENESS SUMMARY
MARINE CORPS AIR STATION - EL TORO, CALIFORNIA
PROPOSED PLAN, OPERABLE UN1T2A, SITE 24 VADOSEZONE
Letters Received During Public Comment Period
Comments by: Courtney Wlercloch, Program Manager, MCAS El Ton Local Redevelopment Authority, In a letter dated May 30,1997
Number
Comments
Response
la
The LRA is supportive of the soil vapor extraction process in removing
volatile organic compounds (VOCs) at IRP Site 24. It is estimated that
the extraction process will be in operation from 2 to 4 years with
completion scheduled to occur subsequent to surplus property transfer to
the LRA. Please provide data which substantiates the 2 to 4 year time
frame. Also status reports generated during monitoring of the extraction
process should include an estimated project completion jdate which will
assist the LRA with its building reuse planning and implementation
process.
The United States Department of the Navy (DON) is conducting soil
vapor extraction (SVE) pilot tests at Marine Corps Air Station (MCAS)
El Toro. The results of these tests to date support an estimated SVE
system operation of 2 to 4 years. As additional data become available,
the estimated time required for remediation will be refined. Remedial
operation status reports will include refined project completion estimates,
as appropriate. Data supporting the estimated 2 to 4 year operation of an
SVE system can be found in the Site 24 Remedial Investigation (RI) and
Feasibility Study (FS) reports which are available for review in the
information repository located at the Heritage Park Regional Library,
14361 Yale Avenue, in Irvine, California. Please call (714) 551-7151 for
current operating hours.
Ib
While the LRA fully supports efforts to remediate IRP Site 24, the soil
vapor extraction system should be designed and located to ensure that
any proposed reuse of Buildings 296 and 297, and all other facilities in
the vicinity, will not be negatively impacted. The proposed reuse of
these buildings will require that all paved surfaces be clear of
obstructions (e.g., system will not impede building, parking, runway or
aircraft apron use). It is requested that the LRA be allowed to comment
on the proposed design, for location purposes only, prior to final
approval.
SVE pilot tests have been ongoing at Site 24 for approximately one year
on an operating airfield. Impacts to airfield operation have been
minimized by coordinating with air operations personnel and designing
around foreseeable problems (e.g., using flush-mounted, traffic-rated
well covers). In general, busy traffic areas, such as taxiways, are
accommodated during the design phase by using underground piping.
Aboveground piping is generally installed in areas where traffic is minor
or can be easily rerouted. Future land reuse will be considered during
the final design of an SVE system. As with the current pilot tests,
impacts to operations from future work will be limited as much as
possible. The DON will coordinate with the Local Redevelopment
Authority (LRA) on this issue.
(table continues)
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Pagel
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Responses to Public (continued)
Number
Comments
Response
Ic
Subsequent to the successful completion of the extraction process, it is
expected that monitoring will be continued on a regular basis in
accordance with existing state and federal regulations. The LRA
requests assurances that monitoring will not interfere with planned
reuse and that the LRA be immediately notified if any new or recurrent
public safety hazard exists.
After successful completion of vadose zone remediation, no additional
monitoring is planned as part of the vadose zone remedy. However,
groundwater monitoring will continue at Site 24, and soil gas may also be
monitored as part of the groundwater remedy. Monitoring activities, like
remediation activities, will be carefully planned to minimize interference
with site reuse.
The DON will promptly notify the LRA of any significant findings from
future monitoring efforts.
Id
Please confirm that subsequent to the initiation of the operation of the
soil vapor extraction system (remedy), that there will be no health risks
associated with excavation of the site to a depth of at least SO feet.
Human-health risks were evaluated for exposure to soil to a depth of
10 feet. The assessment concluded that the risk from exposure to VOCs in
soil was very minor (an excess lifetime cancer risk of about 5 chances in
one billion for the resident; risk was less for the office and excavation
workers). Risk assessments are not normally performed for soil below
10 feet because there are normally no complete exposure pathways to soil
below this depth.
Remediation of contaminated soil may or may not be completed prior to
property transfer. If the SVE system is still operating at the time of deed
transfer, deed restrictions will be used to protect the SVE wells and
equipment and provide access to operate the system. Deep excavation
would be prohibited without prior approval of the DON and Federal
Facilities Agreement (FFA) signatories. Such a proposal for deep
excavation would have to be evaluated on a site-specific basis to assure that
the excavation would not interfere with the effectiveness of the
Comprehensive Environmental Response, Compensation, and Liability Act
(CERCLA) remedy. Deed restrictions are not anticipated to be required
once remediation is complete. Also, once remediation is complete, the
DON does not anticipate any adverse health risks associated with
excavation of soils down to SO feet at Site 24.
(table continues)
'M Mm !:ViKin>j>-1\rapaiti\clo139radMU2«dRflraMMpanM.dac
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Responses to Public (continued)
Number
Comments
Response
le
IRP Site 24 includes Buildings 296 and 297 which were previously
used for metal plating, radium plating, and other aircraft related
rework. Please provide information on any other non-VOC
contaminates [sic] which may impact the site and/or the proposed soil
vapor extraction process.
The Site 24 investigation was directed at VOCs. However, other
Installation Restoration Program (IRP) sites were developed within the
boundary of Site 24 to address non-VOC contaminants. Non-VOC
contaminants at Site 24 were evaluated as part of the investigation of IRP
Sites 7,8,9,10, 11, and 22. The investigation findings for these sites will
be summarized in separate Proposed Plans. The Proposed Plan for Sites 9,
10, and 22 was distributed in June 1997. The Proposed Plan for Sites 7,8,
and 11 is expected to be distributed in 1999. None of the contaminants
identified to date at these sites would affect the proposed SVE system.
Besides the IRP sites, the use and eventual closure of facilities supporting
the operation of MCAS El Toro will be evaluated for non-VOC
contaminants that may have an impact to surrounding soils within the
boundary of Site 24. All these locations of potential environmental
concern are summarized in the Base Realignment and Closure (BRAC)
Cleanup Plan (BCP). The BCP is available for review in the information
repository located at the Heritage Park Regional Library, 14361 Yale
Avenue, in Irvine, California.
If
Please confirm the LRA's understanding that subsequent to having the
final remedy in place, the property associated with IRP Site 24 will be
transferred to the LRA with no institutional controls or restrictions on
ultimate reuse of the property.
During remediation of soils, the DON plans to place restrictions on Site 24
to protect the SVE wells, associated equipment, and system monitoring and
to allow access to complete the remediation and monitor progress. These
restrictions are expected to be removed once vadose zone remediation is
complete.
Deed restrictions are also expected to be necessary to protect the
groundwater remediation system and prevent contact with contaminated
groundwater. These would restrict the future landowners) and/or user(s)
of the site from damaging the groundwater wells and/or associated piping,
from performing subsurface drilling or excavation that would expose
groundwater, and from extracting groundwater for drinking, irrigation, or
commercial purposes. The deed would also reserve a nonexclusive
easement to allow continued access for the DON, the designated DON
contractor, and regulatory agencies to monitor the effectiveness of the
cleanup, perform site inspections, and/or take additional remedial or
removal actions. The vadose zone will be resampled at the conclusion of
groundwater remediation. If the average soil gas concentrations are found
to be above the threshold limits, additional vadose zone remediation may
be necessary.
(table continues)
09/18/97 4:11 PM Mm t\*Ofd_p-1V»pO(UV*)135Vo*$«tf XVJWlnrfrt
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Page 3
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Responses to Public (continued)
Comments by: Bruce Myatt, In a letter dated May 30,1997
Number
Comments
Response
Also, as discussed in Response le, Site 24 also includes other IRP sites
within its boundaries (e.g., IRP Sites 7,8,9,10,11, and 22). At this time,
the DON does not plan to place any institutional controls or restrictions on
the IRP sites within Site 24. However, until the Proposed Plans for these
sites are developed and adopted, the DON cannot make a firm determination
regarding land-use restrictions.
2a
Below you will find a description of several concerns related to the
effectiveness and possible risks associated with the referenced plan.
• Freon is known to be difficult to capture in carbon beds. Freon
from the MCAS soils will probably pass through the carbon and
into the atmosphere.
• Dioxins and furans are known by-products of the thermal
combustion of halogenated chemicals, such as those identified in
the MCAS soils. Their formation occurs through these two
mechanisms, (1) incomplete combustion, and (2) "de novo
synthesis." When carbon (saturated with MCAS halogens) is
thermally regenerated by conventional methods, dioxin and furan
emissions will probably be released from the Regeneration site
due to both mechanisms of formation.
• MEK and other keytone solvents (such as those identified in
MCAS soils) are known to result in combustion when they come
in contact with carbon. Carbon bed fires due to other causes are
not uncommon. If a carbon fire starts in the proposed MCAS
adsorption beds, dioxin and furan emissions will probably be
released from the MCAS site due to both mechanisms of
formation.
What levels of emissions (dioxins, furans, and Freons) are anticipated
with the proposed carbon adsorption system? What emissions levels
(dioxins, furans, and freons) are deemed acceptable?
Freon 113, which is present in soil gas at MCAS El Toro, has an adsorption
capacity in activated carbon of approximately 7 to 12 percent. This means
that 7 to 12 pounds of Freon 113 can be adsorbed onto 100 pounds of
activated carbon. Once the carbon has absorbed this amount of Freon 113,
breakthrough occurs, and it is necessary to change out the carbon. To
prevent releases into the atmosphere, activated-carbon canisters are
generally connected in series. Effluent vapor concentrations are monitored
at each canister. When breakthrough occurs in the first canister, the canister
is removed, the second canister replaces the first, and a new canister is
added. Continuous SVE pilot tests at MCAS El Toro have demonstrated
successful adsorption of Freon to activated carbon.
Carbon will not be regenerated at MCAS El Toro. The carbon vendor will
regenerate the spent carbon at an off-site facility in compliance with all
applicable regulations.
A thermal shutdown sensor is typically used to prevent overheating and
combustion of the carbon beds.
Production and emission of dioxins and furans is not expected because no
thermal combustion will occur on site. However, any emissions that did
occur would meet the emission limits requirements of the South Coast Air
Quality Management District (SCAQMD). These limits are calculated
based on site-specific data. For SVE systems that use offgas control, such as
activated carbon, SCAQMD requires that emissions do not cause an excess
cancer risk greater than one in a million (I x IO"6).
(table continues)
J
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Responses to Public (continued)
Comments by: Mania Rudolph, MCAS El Ton RAB member, In a letter dated May 29,1997
Number
Comments
Response
2b
Some flameless oxidization systems have been shown to effectively
reach levels of complete combustion where dioxin, furan and freon
emissions are virtually eliminated. Has the flameless oxidation solution
been considered?
Flameless oxidation or catalytic oxidation, was considered in the FS report
for Site 24 (Section 2). However, this option was screened out as a viable
technology because it is not cost-effective at the low concentrations and
high flow conditions expected at Site 24.
3a
As a member of the MCAS ET RAB, I am aware of the purpose of the
Site 24 Proposed Plan. Though this plan deals specifically with the soil
in the vadose zone, the implications for the ground water pollution can't
be dismissed. Making sure that the source area soil pollution [is
remediated] is vital to the assurance to the community that the further
[control of] contamination of the ground water can be achieved, or at
the least, further degradation can be successfully halted.
I continue to doubt that the "Presumptive" solution of SVE is indeed the
"Prescription" for this problem. The success that may have been
achieved in Riverside with this process may be due to the character of
the soils in that arid, desert location. Does there exist sufficient data to
prove in a reasonable certainty that the SVE solution will achieve the
same or similar results in the clay, shale layered soils under Site 24?
Evidence that the SVE system will work effectively at Site 24 is provided
by three pilot tests that have taken place at the site. Test No. I was
conducted at one well for 2'/i weeks, and 253 pounds of trichloroethene
(TCE) were removed. Test No. 2 was conducted at the same well 6
months later. The SVE system operated for 10'/i weeks, and 251 pounds
of TCE were removed. The third test was conducted at a different well in
another area of Site 24 for approximately 4'/j weeks, and 310 pounds of
TCE were removed. This is a total of over 800 pounds of TCE removed.
In addition, in the first well, the TCE vapor concentration dropped from
1,300 micrograms per liter (ug/L) to 200 ug/L from the start of the first
test until the end of the second test. These results show that, within a
reasonable certainty, the SVE solution will prove effective at reducing the
amount and concentration of TCE at Site 24. It is expected that some
areas of Site 24, including low-permeability soils (e.g., clayey layers, will
be more difficult to remediate. To increase airflow, these areas may
receive a higher density of SVE wells, may be pneumatically fractured, or
may simultaneously receive air extraction and injection. These strategies
will be finalized during the remedial design phase.
3b
The issue of the "rebound effect" after turning off the SVE has not been
sufficiently address(ed) to my satisfaction. How long will it take for the
maximum effect cleanup of the vadose zone to be achieved, and what
models have been run to determine the "rebound effect," and how long
will it take to return to turning the SVE back on to continue the cleanup
to acceptable levels without a further 'rebound', AND, most critically,
do the Marine Corps and the DON take responsibility for completing
the entire cleanup of the site, including the monitoring and resolution of
the 'rebound'?
The time to reduce the concentrations of TCE in the Site 24 vadose zone
to a value below the threshold concentration is estimated to be 2-4 years.
However, the exact time cannot be predicted more accurately until the
SVE wells are installed, their rate of removal is determined, and the
amount of rebound is known. The SVE system operation will be
optimized to maximize VOC concentrations and operated continuously
until VOC concentrations begin to approach asymptotic conditions. The
DON does not plan to cease operation of the SVE system until data
indicate that the rebound effect will not cause the average concentrations
in soil to exceed the threshold values.
(table continues)
0*18/87 4.11 PM Mm Mwortj>-1Mpart«Vtt135to«i«i2«dmn«A
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Responses to Public (continued)
Number
Comments
Response
3c
What contingency plans have been made to cover the contingency that
IF the Norton hardware is used, that they will not need to 're-possess' it
should their 'rebound effect* require further SVE to clear the 'rebound*
to acceptable levels?
The Norton system is currently being used to address rebound. The
system is expected to become available at the beginning of 1998;
however, if there is a possibility that the system will be repossessed, it
may not be used at MCAS El Toro.
3d
What Deed Restrictions will be placed on the area above the vadose
zone?
Please see the response to Comment If above.
3e
Finally, the issue of the compliance with CEQA and Environmental
Law as to the compliance to the need for a '...public meeting...' as it
relates to the event held May 15,1997 at Irvine City Hall. The event
was successful as [in elucidating the main points] of the SVE issue, but
only drew 35 folk[s] out of an affected population of over 300,000.
There WAS coverage in the local Register Newspaper and notice
mailed to members of the Community, but there are more mechanisms
listed in the Public Relations Plan that were not used to complete this
'meeting'. Though the exposition was well done and did its best to
make a complicated subject understandable to the lay person, the
meager attendance, along with die minuscule comments leaves question
as to whether this would qualify as a 'meeting' under Government
guidelines. It is my belief that a public comment period provided after
a presentation to the group assembled followed by a group give and
take from the attendees would have even more of a sense of a
'meeting.'
The public meeting held on May 15 conforms to guidance in CERCLA
and was chosen because it allowed residents and other interested parties to
meet 1:1 with DON and agency personnel to obtain information and ask
questions which they might have regarding the proposed alternative for
remediation of Site 24. It was felt that this type of meeting would allow
all people attending the meeting, even those who are generally reluctant to
speak before a large group, to have an opportunity to ask questions, raise
issues, and voice their concerns. A public recorder, or court reporter, was
available to record public comments on an individual basis. The positive
response from the public on both the questionnaires and in interviews with
the public recorder attest to the effectiveness of the meeting format.
More specifically, the public meeting held on 15 May meets the
requirements set forth in CERCLA Sections 117(a) and (d) and the
National Oil and Hazardous Substances Pollution Contingency Plan
(NCP) at 40 Code of Federal Regulations (CFR) Section 300.430(0(3) as
follows:
• Advance notice of the availability of the Proposed Plan was provided
in the Los Angeles Times (Orange County edition) and the Orange
County Register.
(table continues)
•>M MR) t\wom_p-lV«parUtelo13Straaitt24\dmnifrMpanM.dac
-------
Responses to Public (continued)
Number
Comments
Response
• The Proposed Plan and associated supporting documents, such as the
Remedial Investigation and Feasibility Study Reports, were made
available for review/comment in the administrative record.
• The Proposed Plan and public notice both announced the availability
of the administrative record and information repository.
• The public meeting provided a forum for both written and oral
comments. In addition, interested parties were encouraged to submit
written comments to Joseph Joyce, the Base Realignment and Closure
(BRAG) Environmental Coordinator, by mail or fax. Mr. Joyce's
address and fax number were provided in the Proposed Plan.
• A 30-day public comment period (30 April - 30 May 1997) was
allowed.
• The public meeting was held at the Irvine City Hall in close proximity
to MCAS El Toro.
• A transcript of the public meeting was kept. This transcript was later
made available at the Administrative Record File at MCAS El Toro.
• A written responsiveness summary was prepared of all comments
submitted along with responses to these comments.
The public meeting was publicized through notices in the Los Angeles
Times (Orange County Edition) and the Orange County Register, media
alerts, and mailings to 1,800 households, businesses, public officials and
agencies. The DON is also exploring additional ways to encourage the
public to participate in upcoming public meetings.
(table continues)
09M8/97 4:11 PM um Umre|_p-1Vipo(t«Vtt13Stre(fl*il«2«dMnrtrttpanM.doc
Page 7
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Responses to Public (continued)
Comments by: Jerry B. Werner, Member, Restoration Advisory Board, In a letter dated May 30,1997
Number
Comments
Response
4a
Do you plan to transfer Site 24 after cleanup without any Deed
Restrictions - except for groundwater?
Please see the response to Comment 1 f.
4b
The proposed cleanup criterion is 27 parts per billion (ppb) of TCE in
the soil gas, which is supposed to translate to 5 parts per billion in the
ground water. As discussed in the RAB meeting of May 28,1997, the
soil gas will achieve an equilibrium value higher than the 27 ppb after
gas pumping is turned off. How do you proposed to establish that the
final equilibrium gas concentration in the soil is less than 27 ppb? It
would appear that you plan to start/stop gas pumping over an extended
period of time - perhaps many years - to establish a satisfactory
equilibrium level. An alternative approach to accelerate the process
might be to pump to a level lower than 27 ppb. Have you considered
this - and if so - to what lower level of gas concentration do you
propose?
It is anticipated that it will take between 2 and 4 years to complete the
cleanup of the vadose zone at Site 24 and will require starting and
stopping the soil vapor extraction system several times over this time
period. This is known as pulsed-mode operation. It is common to extract
vapors to a concentration lower than the cleanup goal with the expectation
of a small rebound. This concentration will be based on data obtained
during operation of the SVE system during pulsed-mode operation. It is
not possible to propose such a value at this time.
The final equilibrium soil gas concentration will be determined by
measuring soil gas concentrations in each extraction well. Specific
sample numbers and locations will be identified during the remedial
design phase.
4c
The proposed Soil Vapor Extraction (SVE) method is considered to be a
"presumptive remedy", which means that it has been successfully used
on other projects. I have, however, been astonished at the lack of
satisfactory answers so far to a number of questions regarding the
procedures to be used (one of which is the previous item). Other
questions which should be provided for the public record include:
a) Will you be continuously monitoring gas "purity" downstream of
the carbon adsorption canisters? As I understand it, activated
charcoal regurgitates what it has collected after it becomes
saturated. 1 also understand that its adsorption capability is limited
by water vapor adsorption. How, then, will you determine when to
change the canisters?
a) Effluent air from the carbon units is generally monitored daily during
the first weeks of operation and then weekly or biweekly as VOC
concentrations decrease. Activated carbon canisters are generally
connected in series. Effluent vapor concentrations are monitored at each
canister. When saturation, or "breakthrough," occurs in the first canister,
the canister is removed, the second (polish canister) replaces the first and
a new polish canister is added. In this way, contaminated vapor will
continue to be adsorbed onto the activated carbon.
(table continues)
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Responses to Public (continued)
Number
Comments
Response
b) Can you provide us with data on the results of SVE at other sites
and their relevance to Site 24?
b) The technical basis for selection of presumptive remedies is described
in the United States Environmental Protection Agency (U.S. EPA)
guidance document "Presumptive Remedies: Site Characterization and
Technology Selection for CERCLA Sites with Volatile Organic
Compounds in Soils." To prepare this document, the U.S. EPA reviewed
88 sites to ensure an even distribution in geographical location, Record of
Decision (ROD) signature date, and site size. Of the 88 sites evaluated, 62
used SVE to remove VOCs from soil. This document is available for
review in the Administrative Record. The effectiveness of SVE at Site 24
is demonstrated by pilot tests at the site. Test results are discussed in the
response to Question 3a.
4d
A great deal of good information was provided to the RAB as a result of
the lively discussion at the May 28,1997 meeting. I suggest that, as a
matter of policy, that the minutes of the RAB meetings contain all of the
questions asked and the responses. And, if the information requested is
not available during the meeting, that responses be provided as part of
the mailing with the minutes. Otherwise, the request is usually lost
(especially with meetings only every other month).
The Restoration Advisory Board (RAB) meeting minutes are intended to
summarize the key issues introduced during the presentation and question
and answer periods. "Restoration Advisory Board Guidelines," issued by
the U.S. EPA and DoD in May 1994, state that: "The RAB should
prepare meeting minutes summarizing the topics discussed at RAB
meetings. The meetings should be concise summaries of RAB meetings
rather than verbatim transcripts to facilitate effective communication with
the local communities." Whenever possible, questions are answered
during the RAB meeting. Issues that cannot be answered during the
meeting are typically carried over to the next meeting where they are
answered and included in summary form in the meeting minutes. The
RAB meeting minutes are available in the Administrative Record for
MCAS El Toro.
4e
Information on all of the Base sites has been provided over thousands of
pages and hundreds of pounds of paper, which make it extremely
difficult to adsorb. What is needed for the RODs is a reasonably
succinct document for us which meets ALL of the [U.S.] EPA
information requirements. Does the "Proposed Plan for Environmental
Restoration at Marine Corps Air Station El Toro (May, 1997) " meet
this requirement?
The Proposed Plan for Site 24 meets the U.S. EPA information
requirements for a Proposed Plan, as presented in the U.S. EPA guidance
document "Guidance on Preparing Superrund Decision Documents: The
Proposed Plan, the Record of Decision, Explanation of Significant
Differences; the Record of Decision Amendment." Regulatory
requirements for the Proposed Plan are found in the NCP at 40 CFR
Section 300.430(0(2). The Proposed Plan for Site 24 meets these
requirements. The ROD will be a separate document and will be included
in the Administrative Record for Site 24 and will be available for review
by any interested party.
(table continues)
i doc
Page 9
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Responses to Public (continued)
Number
Comments
Response
While a Public Meeting has been scheduled by the DON for June 18,
1997, it was the consensus of the Board members who attended the May
15th Public Meeting for Site 24 that the meeting format being used was
not adequate for informing the general public on the technical issues
regarding the proposed cleanup plan. Further, that format did not really
provide a mechanism for a public dialog (i.e., a town meeting type of
format where everybody hears the questions and the answers). No one
else in the public knew the questions that I asked the staff in attendance -
or the answers provided; and I, of course, don't know what anyone else
asked or was told. As I understand it, there were only a total of 9
comments turned in by the public at that meeting (from an estimated
attendance of 35 people, including a number of members of the board
who came out of interest to see what type of information was being made
available to the general public).
Please see the response to Comment 3e above.
Comments by: Sonta Arbetter, Mission Vlejo Resident, In a letter dated May 14,1997
I am very concerned that the toxic waste and soil contaminants need to
be thoroughly cleaned up, as they are polluting ground water under
Irvine.
Even though I now live in Mission Viejo and I am not as directly
concerned with the Marine Base, I lived in Leisure World for 17 years
and I was very active in trying to keep El Toro from becoming a blight
on the area.
South County is still very lovely. There are pristine areas. We don't
want what's left in So. Orange County to become spoiled.
Thank you for anything positive you can do.
The DON shares your concern that VOC soil contaminants at MCAS El
Toro be thoroughly cleaned up and that the source of groundwater
contamination be removed. That is why the cleanup action being taken
at Site 24 is considered so important.
(table continues)
09
-------
Responses to Public (continued)
Comments by: Joseph R. Brown, Jr., In a fax dated May 16,1997
Number
Comments
Response
With respect to the cleanup program at the El Toro Marine Base, to what
standard will the soil be cleaned? Perhaps this could be expressed in
terms of TPH or another standard.
Soil itself does not present a direct risk to human health and the
environment because the risk associated with soil at Site 24 is very low
(an excess lifetime cancer risk of about 5 chances in I billion for a
resident). However, the VOC contamination present in soil does present
an indirect risk because it has the potential to travel, or migrate, to
groundwater where it can contaminate groundwater above acceptable
risk levels. Because of this potential impact on groundwater, the cleanup
standards for vadose zone soil gas are based on maximum contaminant
levels (MCLs) for VOCs in groundwater. MCLs have been developed
by the U.S. EPA and California Environmental Protection Agency
(Cal-EPA) to assure safe drinking water.
Comments by: JeroldJ. Werner, In a presentation prepared for the Public Meeting held on May 15,1997
8
My message is that the proposal to clean up Site 24 at the El Toro
Marine Base is flawed.
I am here as an agent representing a small remediation company located
in Orange. Very small. We have two principal owners and three
employees. One of the owners is a woman with a chemistry background
and the other is a mechanical engineer. Together these two people
invented and developed a very unique and clean vapor extraction system
to clean up TCE and PCE in soil. We do nothing else but TCE and PCE
soil contaminations.
Our system is new and uses a different approach and is state of the art. It
is housed in a very small trailer on site and is very portable. We don't
use carbon; we don't use heat; we don't inject the soil with bugs; we
don't excavate; we don't use internal combustion engines; we don't
discharge anything into the atmosphere; and unlike the carbon system,
we don't generate contaminated carbon.
SVE is the presumptive remedy for cleanup of VOCs in soil. This means
that SVE is the remedy that the U.S. EPA has determined is generally
most effective for VOC-contaminated sites. The presumptive remedy is
described in the U.S. EPA guidance document "Presumptive Remedies:
Site Characterization and Technology Selection for CERCLA Sites With
Volatile Organic Compounds in Soils." Condensation, the treatment
method presented in this comment, was addressed in the FS and screened
out because condensation units are more applicable to sites with
relatively high VOC concentrations and low air flow (i.e., VOC
concentrations on the order of 10,000 ug/L and air flow of
approximately 500 cubic feet per minute or less). At sites where
condensation units are used, the units are typically replaced with
activated carbon after VOC concentrations are reduced to relatively low
levels. At MCAS El Toro, the anticipated air flow is expected to be
between 5,000 and 10,000 cubic feet per minute and initial VOC
concentrations are expected to be approximately 700 ug/L or less.
Activated carbon is more economical at these high flow rates and low
(table continues)
09M8/97 4:11 PM Mm l:\word_(>-1V^)0)t
-------
Responses to Public (continued)
Number
Comments
Response
What we do is to use two very simple properties of chemistry that are in
every chemistry 101 textbook. We convert the TCE in the soil back into
its original liquid form. We collect the TCE in 55 gallon drums for
hazard material transportation. Actually what happens is that the TCE is
generally purchased by a manufacturer to be recycled and resold.
We currently have three local sites using our units. We always obtain a
full [U.S.] EPA permit prior to working on any contaminated site.
Let me describe one of our sites. A Fortune 100 company owns this
property in Torrance. I can't tell you which company it [is] but everyone
in this room would recognize the name. They have a problem. A TCE
problem in the soil of this property. We have been on this site 12
months. We have captured and disposed of 19,000 pounds of TCE so
far. In addition to us, at the site is also a carbon vapor extraction system.
This carbon system has never performed adequately. To date we have
billed the Environmental Engineering company in charge of this site
approximately $200,000 to remove the 19,000 pounds of TCE from the
soil We also have produced weekly reports monitoring the
contamination levels found in the soil vapors. Since we bill the
engineers for our services and not thje property owner, we don't [know]
how much was billed by the engineers to the property owner. Our unit
runs 24 hours a day, 7 days a week. Even as I speak, we are recovering
TCE.
We have problems with the Feasibility Study. First and foremost is cost.
We are upset that our technology was NOT, NOT included as a potential
option to clean up this TCE site. This site was made for us. We made
several attempts to contact the engineers and their sub contractors
involved in the Phase I and 11 steps but were repeatedly ignored or
rebuffed.
VOC concentrations than a condensation unit. As discussed in responses
to Comments 3a and 4c, pilot tests at Site 24 have also confirmed the
effectiveness of SVE for the site-specific conditions.
(table continues)
09
VI tun !:YiMrtj>-1VwparteV3a13ftBdlite24UMnihMpanMidoe
-------
Responses to Public (continued)
Number
Comments
Response
There are many problems with any carbon based vapor extraction
system. Some were briefly discussed in the Feasibility Study and some
were ignored or glossed over.
I. Using carbon as a filtering agent is not new. The Egyptians used it.
The present carbon technology originated 60 years ago.
2. The engineers presented the carbon option as state of the art.
Nothing 60 years old is state of the art. They may add some bells
and whistles but it is not new.
3. The carbon system will clean up the soil but in the process makes
contaminated carbon. This is still a problem.
4. It is not efficient. At least one TON of carbon is needed to remove
just 200 pounds of TCE from the soil. If their estimates of the TCE
in the soil are REALLY wrong, then the cost of the carbon system
will increase because of the additional carbon needed. There is no
limit to the cost increases.
5. The amount of the TCE absorbed by a 200 pound canister of carbon
is subject to a lot of estimates and guess work. It is difficult to
measure.
6. In our experience, estimates of the level of contamination in soil
made by engineers can be off by as much as SO to 500 percent.
They don't know how much TCE is in the soil. The sampling
techniques used for the estimates have serious limitations.
The Feasibility Study states that the proposed carbon system meets eight
of the nine [U.S.] EPA criteria. We think that it meets seven criteria. At
an estimated cost of nearly five million dollars, it certainly must fail the
cost effective criteria. When compared to our system, we feel that the
general public would reject it in favor of our system and it would fail the
criteria of acceptance by the general population. We feet that our system
meets all nine of the [U.S.] EPA criteria.
(table continues)
09/16/97 4:11 PM Mm ttwardj>-1Vip(xt«\cto135Vte2«dnfira(lratpanM.doe
Page 13
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Responses to Public (continued)
Comments by: Jerold J. Werner, In a presentation prepared for the Public Meeting held on May 15,1997
Number
Comments
Response
Lets go back to the cost of cleaning up the TCE in the soil. We charge
$2,500 up front to set up one of (our) units at a site. The Feasibility
Study indicated that the first year's capital cost of using the carbon
option was over one million dollars. We charge $500 per day or
$180,000 per year to operate one unit. Using the proposed carbon
system was estimated at one million dollars, or $2,700 per day, in the
first year. We monitor our own systems daily, it is included in the daily
rate. The Feasibility Study indicated that the first year monitoring costs
alone were going to be $900,000.
In addition to the set up fee and the daily rate, our systems require about
$700 monthly for electricity. We use lots of power. There is a $100 fee
to pick up a 55 gallon drum of TCE for transportation. We also take our
own samples of soil vapors and charge only $50. Labs charge in excess
of $100 for this service.
Summarizing, the Feasibility Study indicated a total cost of
approximately five million dollars to use the carbon vapor extraction
system to clean up the TCE. Even if we installed two of our units,
billing for both, we would clean upnhis site within two years at a cost of
less than $800,000. The final cost is dependent upon how far off the
estimates of the level of contamination that is in the soil.
It is our firm belief that the engineering company involved in this
Feasibility Study made their decision to recommend a carbon vapor
system prior to any evaluation of all options. They knew what their
answer would be prior to beginning the study.
We have found in our experience that many engineering firms fear our
technology. They don't like state of the art technology. With our
system, they don't like the role they play in remediation. They are
reduced to performing minimal monitoring functions and writing reports.
Engineers don't like the idea we can cut the costs of solving TCE
problems 50 to 90 percent of their estimates. We make environmental
engineers eat their estimates of clean up costs.
(table continues)
ol
i.doe
-------
Responses to Public (continued)
Number
Comments
What I want from the Board is a directive to the Engineers to investigate
what we can do. Look at our sites. We are ready for any pilot program.
We can hook up to the wells at El Toro and start capturing TCE within
ten days. We have just built a new unit and are ready. We are ready to
compare ourselves to any carbon vapor system. We are ready for a field
demonstration for anyone. We feel confident that our system is a vastly
superior system to the proposed carbon system.
Response
Comments by: Gall Rtavls, submitted on a meeting evaluation form for the Public Meeting held on May 15, 1997
9a
9b
I called all 3 papers (announcing the public meeting) - 2 were unaware
even with your small ad.
As the ONLY meeting/presentation it was insufficient. Most people do
not know what questions to ask. A presentation was needed with a
microphone and public comment, so people could share the questions
and brain storming.
Extensive efforts were made to assure that the public and interested
parties were informed of the May 15 meeting. Public notices
announcing the May IS meeting were placed in two papers « the Los
Angeles Times, Orange County Edition, and the Orange County Register.
Display-size advertisements were used rather than legal notices to draw
attention to the announcement because display advertisements are larger
than legal notices. The public meeting was also announced in the
Proposed Plan, which was sent to newspaper, television, and radio news
organizations as well as to approximately 1,800 households, public
officials and agencies, and businesses in the vicinity of MCAS El Toro.
In addition, the BRAC Public Affairs Officer followed up the mailings
with phone calls to news staff personnel assigned to environmental issues
to encourage these individuals to publicize and attend the meeting.
Please see the response to Comment 3e.
(table continues)
0*18/97 4:11 PM Mm l:Vwcrd_p-1V*port*Vclo13S\re«*il*24\dmiral
-------
Responses to Public (continued)
Comments by: Enid Cohn, resident of Tustin, California, submitted on form provided for comments on May 28, 1997
Number
10
Comments
The soil vapor extraction works well for removal of volatile organ ics,
however other contaminants which are present in the soil at Site 24 will
not necessarily be removed, especially if these contaminants are not
volatile. This would include heavier hydrocarbons and heavy metals.
The source of some volatile organics other than TCE and PCE may be as
additives to fuels or industrial compounds. What is planned to be done
about locating and cleaning up any heavy metal contamination in near-
surface soils (first 5-10 feet)? What is planned to be done about locating
and cleaning up any heavier hydrocarbon concentrations of concern in
near-surface and deeper soils which may be disturbed during
development activities?
Response
Please see the response to Comment le.
<
Comments by: Charles R. Bennett, Ph.D., Community Co-Chalr/MCAS El Ton RAB,lna letter dated May 29, 1997
11
Questions for the Site 24, Proposed Plan
A. Cleanup Goals
1 . The plan says "Cleanup—will continue until concentrations.. .are
below the threshold levels.", but later "The cleanup goals for soil are
established to meet MCLs". Which goal will it be, below the MCL
or at the MCL?
2. Has any information been provided to the administrative record
that provides a regulatory justification for use of a water quality term
(i.e., MCL) to be indirectly employed (through a soil gas
measurement) as a soil cleanup goal, based upon either a regulation
or science perspective?
The vadose zone cleanup levels for TCE, tetrachloroethene (PCE),
carbon tetrachloride, 1,1-dichloroethene (1,1-DCE), and Freon 1 13
provided in the proposed plan (i.e., soil gas threshold concentrations) are
based on groundwater MCLs. Groundwater, is required not to exceed the
MCLs. Therefore, remediation of the vadose zone should continue until
soil gas concentrations (even after rebound) are at or below their
threshold values.
The regulatory justification for use of the MCL is found in the
applicable or relevant and appropriate requirements (ARARs) discussion
in the Draft Site 24 FS and in Section 10 of the Site 24 Vadose Zone
ROD. These documents are available for review at the Administrative
Record File at MCAS El Toro.
(table continues)
M Mm tteon4j-1W«pa>t«\clo13S\rad\iito24\dMn«h
-------
Responses to Public (continued)
Number
Comments
Response
3. Should the cleanup goal also include the additional, explicit
statement that all other contaminants (e.g., other chlorinates) must
also meet the same MCL goal?
The remediation goals and soil gas threshold concentrations for the Site
24 vadose zone address the reduction of concentrations of VOCs,
specifically TCE, PCE, carbon tetrachloride, 1,1-DCE, and Freon 113.
Extensive soil gas sampling showed that these are the only chlorinated
organics reported at high enough concentrations to pose a potential threat
to groundwater.
B. Conceptual Basis of Cleanup:
I. A simple modification of Henry's Law has been proposed to relate
soil gas concentrations to groundwater concentrations (see Remedial
Investigation). Do the U.S. EPA and the California State Water
Quality Control Board approve of this approximation as means of
determining a successful attainment of a cleanup goal? Can these
agencies validate this procedure (e.g., cite this MCL standard from
soil gas measurements being used at other remediation sites that
have already attained clean closure)?
Yes, both the U.S. EPA and the Regional Water Quality Control Board
(RWQCB) have accepted the methodology presented in the RI and FS
for establishing the cleanup goal for soil at Site 24.
2. If the soil gas measurement standard is accepted as a standard for the
Site 24 Vadose Zone cleanup goals, will the U.S. EPA accept this as
a significant precedent for the standard to be applied to the Site 24
Groundwater cleanup goal, and ultimately the OU-1 deep aquifer
cleanup goal?
The Site 24 Vadose Zone ROD is an interim ROD. It does not establish
remediation goals for groundwater. Groundwater remediation goals will
be established in the ROD(s) for Site 24 Groundwater and OU-1
(Site 18).
(table continues)
09MOT7 4:11 PM MRI !:ViMXd_p-1\rapwt«\cto135
-------
Responses to Public (continued)
Number
Comments
Response
C. Data Validation
I. The data collected for the RI of Site 24 was seriously flawed, with
samples containing target analytes being attributed to outside
contamination derived from the operators. Do the U.S. EPA concur
with DON that the data collected, the explanations given, and the
data validity meet or exceed the standard acceptable for U.S. EPA
approval?
The source of 1,2-dichloroethane (1,2-DCA) reported in routine and field
quality control (source and rinsate blanks) collected during the Phase II
RI at MCAS El Tore has been thoroughly investigated. 1,2-DCA was
identified as a trace contaminant in hydrochloric acid that was used as a
sample preservative for VOC analyses. In general, 0.5 milliliters (mL) of
hydrochloric acid are added to the 40 mL volatile organic analysis
(VOA) vials used to collect the water samples. The hydrochloric acid
preservative is used to prevent biological breakdown of the VOCs in the
water sample.
In October 1995, the presence of 1,2-DCA in water samples was
investigated. The initial investigation identified the vendor of VOA vials
(Eagle Picher) and the specific VOA vial lot number (B5136020) of
those samples affected. These VOAs were part of the CLEAN I field
supply surplus, which were subsequently used during the Phase II RI.
The reported 1,2-DCA concentrations in the water samples ranged from
0.9 to 2.6 ug/L, which is less than the U.S. EPA MCL for drinking water.
The associated field quality control samples had reported 1,2-DCA
concentrations ranging from 1.1 to 2.2 ug/L. These samples were
collected between August 23,1995 and September 22, 1995. After
September 22, the use of VOA vial lot number B5136020 was
discontinued.
Mr. Mark Thompson, the Quality Assurance/Quality Control Manager of
Eagle Picher, reported that the VOA vial lot of concern was not pre-
preserved upon shipment from Eagle-Picher. The implication is that the
hydrochloric acid that contained trace levels of 1,2-DCA was added after
shipment from Eagle Picher. Eagle Picher provided documentation of
this problem in a letter dated May 21,1997. In addition, while the
CLEAN II contract laboratory was not responsible for providing the
contaminated VOA vials, the CLEAN II laboratory also had experienced
similar problems with the presence of 1,2-DCA in hydrochloric acid
documented in a letter dated October 13,1995.
(table continues)
OS
•M Mm l:ta^j>-1Vipartftalo13Sroa*to2«dmin
I doc
-------
Responses to Public (continued)
Number
Comments
Response
The May 21,1997, and October 13, 199S, letters document the fairly
common problem of 1,2-DCA contamination in hydrochloric acid. Our
investigation has determined that 1,2-DCA was reported in samples
collected in vials from VOA vial lot number B5136020. A review of the
data shows that both groundwater samples and quality control samples
collected in these VOA vials had reported concentrations of 1,2-DCA.
The source of the 1,2-DCA was the hydrochloric acid used as a
preservative in the VOA vials. After use of this lot of VOA vials was
discontinued, 39 groundwater samples were collected and none had
reportable concentrations of 1,2-DCA.
Notwithstanding the explanation of 1,2-DCA contaminated hydrochloric
acid, the reported concentrations of 1,2-DCA are very low (less than the
MCL) and would not significantly change the estimated risk from
exposure to groundwater.
2. Do the Public Participation representatives for the State of California
Cal-EPA and U.S. EPA believe the public record on the data validity
has been acceptably maintained?
The DON cannot speak for these individuals. However, Cal-EPA and
the U.S. EPA have both indicated their acceptance through approval of
the Site 24 Rl report. Data validation is summarized in Appendix K of
the Draft Final Rl Report.
Comments on the Site 24 Proposed Plan
A. Cleanup Goals
This is an excellent proposed plan, it should be implemented at the
earliest opportunity as it means pollutants will begin to be removed from
the site.
No response required.
B. Public Participation
1. The Restoration Advisory Board and its community members were
not given sufficient notice that this proposed plan was in place and
the comment period was to commence. The FS was formally issued
for review in mid-March. At the public Board Meeting on March
26,1997, there was NO MENTION OF THE SPECIFIC CLEANUP
GOAL, as evidenced in the minutes of that meeting. This is not an
acceptable level of public participation at the RAB level.
The DON made a presentation at the Public Board Meeting on March 26
that included a discussion of the objectives of the remediation activities
at Site 24, the SVE process, the presumptive remedy approach and the
results of pilot tests performed at the site. Although the cleanup goals
may not have specifically been cited at that meeting, they were presented
in the draft final feasibility study which was issued on March 11, 1997.
The document was made available for public review at the information
repository located at the Heritage Park Regional Library in Irvine,
California.
(table continues)
OW1OT7 4:11 PM urn ttocrd_p~1V«pOfti\cIo135\n>
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Responses to Public (continued)
Number
Comments
Response
1. The normal "Public Meeting" in a comment period has become a
familiar activity to ma(n)y participants, they are a standard
procedure for CERCLA. There is no need to change or modify this
common, standard activity.
A different activity was held at the Irvine City Hall on May IS, 1997
that complied with the letter of the regulation for the holding of a
"Public Meeting" according to the attending U.S. EPA
representative. It was advertised as, and appeared to succeed as, an
opportunity for individuals to have their individual questions
answered, and their individual opinions recorded, if they so wished.
While complying with the letter of the regulation, it did not comply
with the spirit of the law about a "Public Meeting". It IS incumbent
on the DON to demonstrate that their method is clearly superior to
the normal "Public Meeting". It IS NOT incumbent on the
community to prove the new method is inferior. As advertised,
structured and operated, the meeting could not have provided for the
needs of the community for public participation in the process.
[This unfavorable view was explicitly expressed by each individual
community member of the El Toro RAB on 28 May, in 100%
opposition to the non-community organizers of the meeting.] While
democracy is disorganized, chaotic, difficult, and often inefficient,
history teaches that it is what the public want. The deeply respected
concept of having "your day in court" means Mary Jones stands up
in front of her neighbors in a public forum and tells her Council or
her Board or her Judge exactly what she thinks about the issue.
While being in compliance with regulation, this public comment
period did not provide an acceptable public forum, and hence it does
not meet an acceptable standard for public participation in the ROD
process. As a superior process has not occurred, return to the
"presumptive" method for holding public meetings that is the
CERCLA norm - immediately.
Please see the response to Comment 3e.
(table continues)
Oft
M Mm ttwort_p-1V«part«te!p135tadM«2«dMnihMpani«.doc
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Responses to Public (continued)
Number
Comments
Attachment 1 — Points regarding the Proposed Plan for Site 24 Vadose
Zone Soil Remediation:
A. The 27 ppb TCE and 69 ppb PCE cleanup targets:
What is the basis for these goals?
How are these targets justified?
Will "rebound" mean targets exceeded?
B. Norton AFB soil remediation was similar to this plan, what has been
the degree of success at Norton?
C. Are the El Tore ROD's still on their original schedules?
*
D. Note: All unresolved issues regarding Site 24, which anyone
commented upon earlier, must be resubmitted for this first "official"
Public Comment Period to obtain official response.
Response
The 27 ppb TCE and 69 ppb PCE remediation targets for Site 24 soil are
based on the MCLs for TCE and PCE in groundwater, respectively.
These targets were developed by using Henry's law to convert soil gas
concentrations to equilibrium VOC concentrations in water infiltrating
through the vadose zone and mixing into groundwater. Rebound is
expected to occur and is considered in the operation of the SVE system.
To account for rebound conditions, the SVE system will be turned off
and the VOC concentrations will be allowed to reach equilibrium. If the
average equilibrium concentration exceeds the threshold concentrations,
this process will be repeated until average equilibrium soil gas
concentrations are at or below their threshold values. This should assure
that the targets are not exceeded.
The remediation at Norton Air Force Base has been very successful.
Approximately 6,000 pounds of TCE have been removed. The SVE
system at Norton is currently being concentrated on isolated areas that
exceed the soil remediation level.
No. The schedules for several of the MCAS El Tore RODs have been
modified to allow more time for pilot testing, resolution of issues
associated with institutional controls, ongoing negotiations with the
Orange County Water District, and for public comment.
No response required.
(table continues)
0*18/97 4:11 PM tun tlwordj>-1\rapeiU\c*o139ndWM24\dmintfra
XIM.dOC
Page 21
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Responses to Public (continued)
Comments from Public Meeting
Comments by: Danny Querantes, Resident Irvine, California, provided to the court reporter at the May 15,1997 Public Meeting
Number
12
Comments
The groundwater contamination should be actively pursued immediately.
A carcinogen constantly migrating across property lines eventually
contaminating a city's drinking water supply is much more threatening to
the people. The proposed plan is adequate, at best, and is moving at a
snail's pace.
Response
The DON agrees that groundwater contamination needs to be addressed
immediately, but the DON needs to make sure that the method of
addressing contamination is technically sound. At this time, pilot tests
are being conducted to help evaluate several remedial methods. These
tests are being conducted in the area of the highest TCE contamination.
Once the tests are complete and the ROD for groundwater has been
approved, remediation can begin. Meanwhile, the Proposed Plan and
ROD for soil at Site 24 are being issued separately from groundwater so
that soil remediation can start immediately and minimize or prevent
further contamination of groundwater.
Comments by: Gall Reavls, Resident Mission Vlejo, California, provided to the court reporter at the May 15, 1997 Public Meeting
13a
13b
I guess, first of all, I'd like to say-1 don't like the format of the open
house as opposed to having a meeting where people can hear other
people's thoughts and concerns.
Mostly, I understand that this cleanup effort is to the level of anticipating
that the Air Base will be replaced with an airport, so that the level of
cleanup does not have to be as tight. Standards are lower for the cleanup
when they put an airport in to a replace an Air Base.
I know the Board of Supervisors had voted on having an airport. But I
don't think that the issue is resolved satisfactorily, that cleaning it up to
this level is not satisfactory.
Please see the response to Comment 3e.
This statement is not correct. Remediation targets for soil are based on a
residential scenario and support using the site for either residential or
commercial purposes.
(table continues)
09/1]
M Mm lt«xdj>-1V«port»V*}1 J$Vo*»«»2<\dWiMRm«pon»».doe
-------
Responses to Public (continued)
Comments by: John GuptlU, Polar Marine Incorporated, provided to the court reporter at the May 15,1997 Public Meeting
Number
Comments
Response
14
With me today is Mr. Donald Rez. Donald Rez is the President of Polar
Marine and the inventor of the process that we were talking about to
some of these people. And we learned a great deal from the displays,
and so forth, and from talking to the gentlemen from the Navy and
Marine Corps. And we think the displays were very good. And it's a
good show.
No response required.
Comments by: Layton Rawlins, Dana Point Sentinel, provided to the court reporter at the May 15,1997 Public Meeting
15
My kept inherent reason we attended this meeting, after reading about it
in "The Orange County Register," was that this was going to be, in our
opinion, the big story, much bigger than all the attention that is being
paid to whether or not there (is to) be an airport at the former El Toro
Marine Station.
I've been advised by a Retired Marine Colonel that once the Navy
Secretary turns in his key to El Toro, that any cleanup that hasn't been
done by that time is probably not going to be done.
And so, our concern is that we rattle enough sabers between now and the
time that the Base is actually closed and that key is transferred over to
Orange County, whomever else will take control of that 4738 acres; that
we do everything possible to get as much cleanup done as possible if--
hopefully, one hundred percent of the cleanup be attended before the
Navy resigns the Base.
The DON is required by law to remediate MCAS El Toro. The
responsibility for remediation does not end until remediation is complete.
In the case of ground water, this could be many years after the Station has
been turned over for reuse.
It is in the Marine Corps' best interest to complete as much of the
remediation as possible before the land is turned over because it is easier
to obtain access and perform remediation activities while the land is still
under the Marine Corps' control. Unfortunately, it is not technologically
possible to complete all remediation activities before the Marine Corps
closes and transfers the Station.
(table continues)
09/18/97 4:11 PM Mm tVward_p-1\rapwti\cto135VodUtt24VffflnifrMpanM.doc
Page 23
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Responses to Public (continued)
Comments by: Elbe Steele, Project 99 and TRP, provided to the court reporter at the May 15, 1997 Public Meeting
Number
16
Comments
I would like to suggest, as a public citizen, that we have another Public
Meeting, as we have here today, before May 30th, if possible. 1 do not
think enough information was put out in the newspapers. There should
have been more people here, certainly from Project 99 and TRP, who are
very strong in fighting the El Toro Airport as an international Base reuse.
1 would suggest that people call me. Because 1 did find 1st Lt. Matt
Morgan, USMC, was most cordial, most helpful. And he would really
appreciate having more public opinion, and people helping and learning
what this cleanup remedy is all about.
There has not been enough time for people to be advised of these
meetings. And he suggested there might be more meetings on different
site cleanups in the next few years.
But I think we should have more meetings on the Site 24, which is the
one they are attacking now.
Response
The issues of the remediation of Site 24 and the reuse of the land are
separate. The purpose of the Proposed Plan and ROD for Site 24 is to
obtain concurrence for operation of an SVE system to reduce
concentrations of VOCs in soil. Adoption of the Proposed Plan and
ROD will allow the DON to start soil remediation, but does not commit
the DON or the public to a particular site reuse. In fact, remediation
targets for soil, which are presented in the Proposed Plan and ROD, are
based on a residential scenario and support using the site for either
residential or commercial purposes.
A public notice is used to announce public meetings held for MCAS El
Toro. This notice is placed in the Los Angeles Times (Orange County
Edition) and the Orqnge County Register. Such a notice is required by
CERCLA Sections 1 17(a) and (d) and the NCP at 40 CFR Section
300.430(f)(3). The Site 24 public meeting was also announced in the
Proposed Plan that was sent to approximately 1,800 households, public
officials and agencies, and businesses. Similar announcements will be
used for all future public meetings for the Station.
Comments by: Nancy Hazlett, Resident, Lake Forest, California, provided to the court reporter at the May 15, 1997 Public Meeting
17
And I speak from ignorance, to some degree. 1 found out a lot today.
My only concern would be that this cleanup would be thorough and the
Marines, or whoever is in charge, would be committed to completing the
cleanup. I've been assured that is so. I just trust it is.
We're very anti-airport. And so, there's a concern there, you know,
whether the airport will actually go in or not. And I understand that this
is sort of proposed with the assumption that the airport will go in. And
we certainly don't want the airport to go in, but we do want the cleanup.
Please see the response to Question 16.
(table continues)
oaJ
-------
Responses to Public (continued)
Comments by: Gerhard "Gary" Knapp, President, GFK Consulting, Ltd., provided to the court reporter at the May 15,1997 Public Meeting
Number
Comments
Response
18
My comment, basically, is that the technology that's being selected here
of activated carbon absorption for these chlorinated solvents is the best
and environmentally most effective way of doing the job. That's my
personal opinion.
And, basically, it is being done properly. It is being removed from the
ground. It is being absorbed, the carbon. The carbon can be treated
again in an environmentally-accepted manner. So it's the best way to do
it.
No response required.
Comments by: Harry Chenarldes, Resident Allso Vlejo, provided to the court reporter at the May 15,1997 Public Meeting
19
Why am I here? I'm here because the meetings that are conducted at this
particular site regarding the safety and cleanliness of the El Toro Air
Base affect me, because I am a resident of Aliso Viejo.
And in that regard, if another airport site goes into where the Marine
Corps Base is in 1999, then I will not only have air pollution, I'll have
traffic infrastructure problems coming out the gazoo [sic]. And we'll
have all kinds of municipalities - like water, electricity, telephone lines -
- multiplying by the thousands. *•
The airport itself, if it becomes an airport, will increase their flight
pattern and timing to one every thirty seconds, as opposed to the
military, which has it right now. And they conduct their flights from
about 6:00 in the morning till about 7:00 or 8:00 at night And then, they
stop. And that doesn't happen every day of the week, which is what
would happen if an international airport went in that particular site.
Now, I'm concerned with the board meetings here to the degree that they
have spoken about the safety and cleanliness of the site being brought to
a residential level, and not stopped at a commercial level.
Please see the response to Comment 16.
(table continues)
09/18*7 4.11 PM Mm t\)«ordj>-1\rapa>Utele139fe«*l*2«dMkwhMpo(«*.dae
Page 25
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Responses to Public (continued)
Number
Comments
For example, Lt Man Morgan has spoken to me, saying they were
obligated ~ "they," the Marine Corps - were obligated to bring that up
to a residential state of cleanliness regardless, because that's their orders,
to bring it up to a residential level.
I'm satisfied with that, because I am for a nonaviation use of the El Toro
Marine Corps Base.
Much to my dismay, the Orange County Board of Supervisors feel that
airport site is much more profitable than a nonaviation use of the site.
There have been several promotional ideas submitted to the Orange
County Board of Supervisors, who speedily reject them without even
looking at them.
And 1 know that, because I attend the Orange County Board of
Supervisors. And people like Silva, Steiner and Smith have absolutely
no concern at all about any proposal that does not talk about an aviation
site in that particular area. They are dead set against anything that's
nonaviation.
In that regard, I'm concerned about what goes on over here. So it's sort
of, like I mentioned earlier, a left-handed way of knowing what's going
on at this board and how it's being prepared for, whether it will be
prepared for, commercial or residential use.
Response
Comments by: Mania Rudolph, Resident Lake Forest, California, provided to the court reporter at the May 15, 1997 Public Meeting
20
Put it this way: My perception is that someone unfamiliar with the
process may very well find themselves snowed. I have been involved
with the process since the RAB started and am familiar with it. 1 think
it's a good presentation. 1 think the people involved are doing the best to
try and bring this technical information down to the level of the average
person who is coming in, you know, wanting to know, you know, are my
kids going to turn blue with the pollution in the water. And to that
degree, I think this has been helpful.
No response required.
(table continues)
09
-------
Responses to Public (continued)
Comments by: Scott Broten, Resident Aliso Vlejo, California, provided to the court reporter at the May 15, 1997 Public Meeting
Number
21
Comments
It seems very appropriate, the selection and the technology. And it
seems like ~ based on the Remedial Investigation, that they've done a
good job of investigating it and presenting it here tonight.
Response
No response required.
Comments by: Amy Spurgeon, Resident Orange, California, provided to the court reporter at the May 15,
22
1 think it's good that the approach to remove the TCE from the ground
through soil vaporization approach - is that what it is? - SVE, I think
that's positive. Because they've seen it works before; and it removes a
great amount of contamination; and it's going to see that there is a way
to clean it up. And all these people are working hard at it.
1997 Public Meeting
No response required.
Several additional comments were made anonymously on a Meeting Evaluation form used to solicit feedback on the Public Meeting. These comments reiterated the
concerns raised in the comments summarized above and are therefore addressed by the comment responses.
Acronyms/Abbreviations
ARAR - applicable or relevant and appropriate requirement
BCP - BRAG Cleanup Plan
BRAC - Base Realignment and Closure
Cal-EPA - California Environmental Protection Agency
CEQA - California Environmental Quality Act
CERCLA - Comprehensive Environmental Response,
Compensation, and Liability Act of 1980
CFR - Code of Federal Regulations
CLEAN - Comprehensive Long-Term Environmental Action Navy
OCA - dichloroethane
DCE - dichloroethene
DON - United States Department of the Navy
FFA - Federal Facilities Agreement
FS - Feasibility Study
IRP - Installation Restoration Program
LRA - Local Redevelopment Authority
MCAS - Marine Corps Air Station
MCL - maximum contaminant level
MEK - methyl ethyl keytone
M9/L - micrograms per liter
ml - milliliter
NCP - National Oil and Hazardous Substances
Pollution Contingency Plan
OU - Operable Unit
PCE - tetrachloroethene (perchloroethene)
ppb - parts per billion
RAB - Restoration Advisory Board
Rl - Remedial Investigation
ROD - Record of Decision
RWQCB - Regional Water Quality Control Board
SCAQMD - South Coast Air Quality Management District
SVE - soil vapor extraction
TCE - trichloroethene
TPH - total petroleum hydrocarbons
U.S. EPA - United States Environmental Protection Agency
VOA volatile organic analyte
VOC - volatile organic compound
09/18(97 4:11 PM f*n MwortjMV«poftaWlo13S\rodWU24Vttfin«flra*|>oni*.doc
Page 27
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SUMMARY OF RESPONSES TO BCT COMMENTS ON
REMEDIAL INVESTIGATION AND FEASIBILITY STUDY
REPORTS FOR OU-2A
-------
Summary of Responses to Base Closure Team (BCT) Member Charles R. Bennett, Ph.D. Comments
Marine Corps Air Station - Tustin, California
Remedial Investigation/Feasibility Study for OU-2A
Comment Origin: Comments on the Draft Phase IIFS Report, provided by letter from Charles R. Bennett, Ph,D., dated March 19,1997 and
resubmltted during the public comment period
Number
Comments
Response
la
Executive Summary
A. Page ES-5, P 1, L4: The "presumptive remedies" (from the
U.S. EPA) are presented as prescriptive remedies for VOC-
contaminated sites. Consequently, in order to bypass the
identifying and screening of remedial technologies for Site 24, the
VOCs should then be considered in total. Consequently, the
bifurcation of remedial approaches for OU 1 and OU 2 A would
have to be rescinded, and a remedy that is comprehensive for both
OU 1 and OU 2 must be presented.
Does this feasibility study, then, only address some of the VOCs
of concern?
Remedial alternatives for Site 24 were developed in accordance with the
United States Environmental Protection Agency (U.S. EPA) guidance
document "Presumptive Remedies: Site Characterization and Technology
Selection for Comprehensive Environmental Response, Compensation, and
Liability Act (CERCLA) Sites With Volatile Organic Compounds in Soils."
The Draft Final Feasibility Study (FS) for the Site 24 vadose zone addresses
all volatile organic compounds (VOCs) in the vadose zone at Site 24 that are a
potential threat to groundwater (i.e., that have the potential to contaminate
groundwater above their respective maximum contaminant levels [MCLs]).
Additional VOCs may exist at Operable Unit (OU)-1 or OU-2A; however,
these VOCs are not considered VOCs of concern for the vadose zone Record
of Decision (ROD).
Ib
B. Page 1-42, P 2: The commentary regarding 1,2 DC A is
flawed, this flaw has been acknowledged by staff personnel as
early as February of 1996. Clarification and adequate explanation
of these statements has NOT been provided to the RAB since that
time. No known written substantiation for these flaws has been
provided to the RAB. The persistence of the use of these data,
which may be underestimating the potential toXtcity of the
groundwater, means that the risk assessment may be understating
the true risk to human health and the environment. Will this
statement ever be corrected?
The source of 1,2-dichloroethane (1,2-DCA) reported in routine and field
quality control (source and rinsate blanks) collected during the Phase II
Remedial Investigation (RI) at Marine Corps Air Station El Toro has been
thoroughly investigated. 1,2-DCA was identified as a trace contaminant in
hydrochloric acid that was used as a sample preservative for VOC analyses. In
general, 0.5 milliliters (ml) of hydrochloric acid are added to the 40 mL
volatile organic analysis (VOA) vials used to collect the water samples. The
hydrochloric acid preservative is used to prevent biological breakdown of the
VOCs in the water sample.
(table continues)
09H8/97 12:48 PM urn t\wort_p-1\«port»\cto135Vo*$it»24y«in»l*ctonU.
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Responses to BCT Member (continued)
Number
Comments
Response
In October 1995, the presence of 1,2-DCA in water samples was investigated.
The initial investigation identified the vendor of VOA vials (Eagle Richer) and
the specific VOA vial lot number (BS136020) of those samples affected.
These VOAs were part of the Comprehensive Long-Term Environmental
Action Navy (CLEAN) I field supply surplus, which were subsequently used
during the Phase II RJ. The reported 1,2-DCA concentrations in the water
samples ranged from 0.9 to 2.6 micrograms per liter (ng/L), which is less than
the U.S. EPA MCL for drinking water. The associated field quality control
samples had reported 1,2-DCA concentrations ranging from 1.1 to 2.2 ng/L.
These samples were collected between August 23,1995 and September 22,
1995. After September 22, the use of VOA vial lot number B5136020 was
discontinued.
Mr. Mark Thompson, the Quality Assurance/Quality Control Manager of
Eagle Picher, reported that the VOA vial lot of concern was not pre-preserved
upon shipment from Eagle-Picher. The implication is that the hydrochloric
acid that contained trace levels of 1,2-DCA was added after shipment from
Eagle Picher. Eagle Picher provided documentation of this problem in a letter
dated May 21, 1997. In addition, while the CLEAN II contract laboratory was
not responsible for providing the contaminated VOA vials, the CLEAN II
laboratory also had experienced similar problems with the presence of
1,2-DCA in hydrochloric acid documented in a letter dated October 13, 1995.
The May 21, 1997, and October 13,1995, letters document the fairly common
problem of 1,2-DCA contamination in hydrochloric acid. Our investigation
has determined that 1,2-DCA was reported in samples collected in vials from
VOA vial lot number B5136020. A review of the data shows that both
groundwater samples and quality control samples collected in these VOA vials
had reported concentrations of 1,2-DCA. The source of the 1,2-DCA was the
hydrochloric acid used as a preservative in the VOA vials. After use of this lot
of VOA vials was discontinued, 39 groundwater samples were collected and
none had reportable concentrations of 1,2-DCA.
Notwithstanding the explanation of 1,2-DCA contaminated hydrochloric acid,
the reported concentrations of 1,2-DCA are very low (less than the MCL) and
would not significantly change the estimated risk from exposure to
groundwater.
(table continues)
0*18/97 12:48 PM urn l:\wndj^1V«porti\clo13S
-------
Responses to BCT Member (continued)
Comment Origin: Co.nments on the Draft Phase IIFS Report, provided by letter from Charles R. Bennett, Ph.D., dated October 7,1996
Number
Comments
Response
2a
General Comment - Serious approaches to cost-effective treatments of
this shallow aquifer water should be made, instead of the approach as
given.
A. Page v - regarding the groundwater options, only "No Action" or
"Extraction" are offered for thorough analysis. As no "in Situ"
treatment option was permitted to survive, no critical cost
comparisons could be made among the three directions.
Elimination of the in situ options requires a more comprehensive
evaluation prior to their elimination.
This comment refers to groundwater, not soil at Site 24. The Proposed Plan
for Site 24 only addresses remediation of vadose zone soil. Groundwater will
be addressed in a later plan. For soil, soil vapor extraction (SVE) is essentially
an in situ option because only the vapors (and not the contaminated soil) are
being drawn to the surface for treatment.
2b
B. Page vii — The extraction volumes are quite significant for the
shallow groundwater aquifer option, the cost of extraction is
similarly quite significant - up to $15,000,000. Are there no less
costly alternatives to "No Action" than "Extraction" that could be
more effective in a shorter period of time?
This comment was made on the draft FS report for Site 24. Subsequent to
issuing this report, a decision was made to issue separate FS reports and
proposed plans for groundwater and vadose zone soils. The proposed plan
currently being addressed is for vadose zone soils only. This comment refers
to groundwater, not soils and is most appropriately addressed at a later time
when the draft final FS report and proposed plan for groundwater are issued.
2c
C. Page 1-13 - The IAFS addendum is reported as "in preparation"
As the selected alternative may coriie from these added
alternatives, the background and information contained in this
addendum need to be shared with the subcommittees, the RAB,
and the community.
The Interim-Action Feasibility Study (IAFS) addendum referenced in this
comment addresses groundwater, not vadose zone soils. The comment is most
appropriately addressed at a later time when the proposed plan for
groundwater is issued.
2d
D. Page 1 -18 - The site stratigraphy charts have many question
marks, as do the estimated boundaries for the TCE. Uncertainty
ranges should be narrowed. Should the analyses to determine
stratigraphy be more definitive and only focus on the target
analytes of concern (e.g., TCE analysis only) at a much lower
cost?
This question marks that are referred to in this comment concern groundwater,
not soils at Site 24. The boundaries of the trichloroethene (TCE) in
groundwater are being refined as the result of ongoing groundwater
remediation pilot testing. If significant changes in the boundaries are
discovered, the boundaries will be modified in the draft final FS for
groundwater at Site 24.
(table continues)
09/16/97 12:40 PM MID lVwon»_p-1V»porti\cto1 }5\red\ite24\dmml«bclcmti.
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Responses to BCT Member (continued)
Number
Comments
Response
2e
E. Page 1-43 - Regarding responses for the 1,2-dichloroethane
detections, the writer's explanation is hopeless and hapless. If this
statement is true, it calls into question every analysis
performed in these studies. If the data is questionable, then none
of the performers of the work should be paid for the work, as the
entire report must be discounted. A comprehensive
"Memorandum of Understanding" should be prepared to detail
this result, detail the occurrences of a contamination, determine
the extent of this gross failure of field performance, and culminate
with a comprehensive determination of the risks to the quality of
ALL the analyses. Until that time, this report should be
considered unfinished and project deadlines not met.
Retroactively, this should apply most directly to the Remedial
Investigation report This is a very serious, potentially fatal flaw
in this work.
The supposition that 1,2-DCA was introduced to the water sample from
contaminated hydrochloric acid has been substantiated as a fairly common
laboratory problem. The field investigators were immediately aware of
reported detections of 1,2-DCA in both the routine and quality control
samples. This is what initiated the investigation to determine the possible
source of 1,2-DCA. As stated in Response I b, after the sample vial lot in
question was no longer used, 1,2-DCA was no longer reported in Site 24
groundwater samples. It appears that the 1,2-DCA was introduced into the
groundwater samples via the contaminated hydrochloric acid used as a
preservative. We disagree that the data are questionable. The Rl report which
contains these data has been accepted by the California Environmental
Protection Agency, Department of Toxic Substances Control (DTSC) and the
U.S. EPA who consider the data sound.
2f
F. Page 1 -43 - The likelihood for the possible presence of 1,2 DC A
and its impact on fate and transport is more correctly directed at
all the flaws in the Remedial Investigation Report, primarily on
page 5-3. [Frankly, I am surprised that none of the other
reviewing agents appear to have raised these obvious problems in
the earlier report.] There is no literature reference that supports
the conversions theorized to form 1,2 DCA. This is not a
conversion that is chemically logical for in situ conversions in soil
and groundwater. This point should be addressed and eliminated
in a Technical Memorandum. Why has this error been permitted
to be propagated unchallenged?
It appears that this comment applies to the Draft RI for Site 24, not the Draft
Final RI. Page 5-3 in the Draft Final Rl is a figure showing potential chemical
and biological transformation pathways of the tetrachloroethene
(PCE)/trichloroethene (TCE) group, but 1,2-DCA is not represented on the
figure as a conversion product.
2g
G. Page 2-12 - The low MCLs and ARARs, as presented in the table,
are of concern if there is a potential presence of 1,1,2-TCA or
1,2-DCE. How certain are we that 1,1,2-TCA or 1,2-DCE are not
present?
1,1,2-trichloroethane (TCA) and 1,2-dichloroethene (DCE) are present in soil
gas at Site 24. 1,1,2-TCA was detected during Phase II in 2 of 290 soil gas
samples at a maximum vapor concentration of 2 ng/L. 1,2-DCE was detected
during Phase II in 14 of 292 soil gas samples at a maximum concentration of
10 ng/L. These concentrations are not high enough to contaminate
groundwater above the MCLs. Therefore 1,1,2-TCA and 1,2-DCE are not
considered VOCs of concern for the vadose zone at Site 24.
(table continues)
0*18/8712:48 PM Mm hVword_p-1\™port»V»135Vo*»«*Z*dWi™M>ctcint».doc
Page 4
-------
Responses to BCT Member (continued)
Number
Comments
Response
2h
H. Page 2-19,20 - At this point the in situ treatments are
highlighted. While some of these are described quite well in
Appendix B, very few of the agents specifically cited on these
pages are ever mentioned again; that is, they are never actually
evaluated. Potential in situ methods should be critiqued and
assessed more thoroughly.
This comment refers to groundwater, not soil. SVE is essentially an,in situ
treatment for soil because only vapors, not soil, are being drawn to the surface
for treatment. In situ treatment of groundwater will be addressed in the draft
final FS for Site 24 groundwater.
2i
Table 2-8/Page 2-45,2-47,2-49 - None of the in situ options
were deemed "Applicable", only "Potentially Applicable". While
at first glance this seems fair, the consequences are severe. All
subsequent detailed analyses of these in situ options are
terminated from further consideration at this point. This is
certainly valuable if the ultimate objective is to force a choice to
one that is only between a very low cost "No Action" or "Natural
Attenuation [sic]" choice and a much more expensive
"Extraction" choice.
This comment refers to groundwater, not soil. SVE is essentially an in situ
treatment for soil because only vapors, not soil, are being drawn to the surface
for treatment. In situ treatment of groundwater will be addressed in the draft
final FS for Site 24 groundwater.
2j
J. Table 2-8/Page 2-49 - "iron filings"... "Difficult to implement
due to the depth of groundwater at Site 24." (N.B. -100 ft to
groundwater, page Bill • 24). With these nine words, this in situ
option is sunk. Could the difficulty to implement this option
really cost more than $15,000,000 to overcome? A more rational
evaluation of this technology should be made before it is rejected.
This comment addresses groundwater, not vadose zone soils. The comment is
most appropriately addressed at a later time when the proposed plan for
groundwater is issued.
2k
K. Page 3-2 - By this point, in situ methods are gone from feasibility
consideration and further comment beyond this point in the Draft
FS is NOT significant. In situ methods are typically 1/10 the cost
[of] any of the comparable ex situ treatments. Why bother to
waste any time arguing about the negligible differences in the
myriad variants on "Extraction", when you have already
succeeded in terminating consideration of any serious alternatives
with only minimal discussion.
This comment addresses groundwater, not vadose zone soils. For soils, SVE is
essentially an in situ treatment, because only the vapors and not the soils
themselves are extracted for treatment. In situ treatment of groundwater will
be addressed in the draft final FS for Site 24 groundwater.
(table continues)
09/18/97 12:48 PM Mm l:\*ort_p-1V»port»\clo135Vo*»«»24V«(V»«bc(anU.*)C
Pages
-------
Responses to BCT Member (continued)
Comment Origin: Comments on the Draft Phase IIFS Report, provided by letter from Charles R. Bennett, Ph.D., dated August 15,1996
Number
Comments
Response
3a
A. Page v - Regarding the groundwater options, only "No Action" or
"Extraction" are offered for thorough analysis. As no "in situ"
treatment option was permitted to survive, no critical cost
comparisons could be made among the three directions. Was "in
situ" eliminated prematurely?
This comment addresses groundwater, not vadose zone soils. For soils, SVE is
essentially an in situ treatment, because only the vapors and not the soils
themselves are extracted for treatment. In situ treatment of groundwater will
be addressed in the draft final FS for Site 24 groundwater.
3b
B. Page vii - The extraction volumes are quite significant for the
shallow groundwater aquifer option, the cost of extraction is
similarly quite significant - up to $15,000,000. Is there no less
costly alternative to "No Action" than "Extraction"?
This comment addresses groundwater, not vadose zone soils. The comment is
most appropriately addressed at a later time when the proposed plan for
groundwater is issued.
3c
C. Page 1 -13 - Has the draft OU-1 IAFS been widely distributed?
To whom?
The OU-1 IAFS has been submitted to regulatory agencies for review and is
available for public review in the Administrative Record for OU-1. In
addition, a fact sheet summarizing the results of the OU-1 IAFS was issued to
the public in December 1996.
3d
O. Page 1 -13 - The IAFS addendum is reported as "in preparation".
As the selected alternative is probably to come from these added
alternatives, has the information contained in this addendum been
shared yet with the subcommittees, &e RAB, and the community?
The IAFS addendum was issued in August 1996 and was shared with the
Restoration Advisory Board (RAB) at that time.
3e
E. Page 1-18- The site stratigraphy charts have many question
marks, as do the TCE estimated boundaries. Uncertainty ranges
should be narrowed. Could the analyses to determine stratigraphy
be more definitive (e.g., TCE analysis only - "a rifle shot"
approach) rather than so broad (i.e., "the shotgun" approach of
analyzing for everything such as TDS, nitrate, pesticides, etc.)?
Please see response to 2d.
3f
F. Page 1-43 - Regarding 1,2-dichloroethane, the writer's
explanation is not supported by the data (see attachment of memo
to J. Joyce dated 28 February 1996). Why has there been no
response to the community regarding this point? Why was this
error permitted to be reiterated unchallenged?
Please see responses to 1 b, 2e, and 2f.
(table continues)
OW18/9712:48 PM urn t\wordj>-1V^)ati\d0135ln9«ito24Vd(MniN)Ctant«.doe
Page 6
-------
Responses to BCT Member (continued)
Number
Comments
Response
G. Page 2-12- The low MCLs and ARARs, as presented in the table,
are of concern if there is a potential presence of 1,1,2-TCA or 1,2-
DCE. Are we certain there is no 1,1,2-TCA or 1,2-DCE present?
See response to 2g.
3h
H. Page 2-19,20 ~ At this point the in situ treatments are
highlighted. While some of these are described quite well in
Appendix B, few of the agents mentioned on these pages are ever
mentioned again (i.e., evaluated). Were the potential in situ
methods evaluated thoroughly?
This comment addresses in situ treatment of groundwater, not soil, and is most
appropriately addressed in the draft final FS and proposed plan for
groundwater at Site 24.
3i
Table 2-8/Page 2-45,2-47,2-49 - None of the in situ options
were deemed "Applicable", only "Potentially Applicable" (N.B.
"the devil is in the detail"); consequently, all detailed analyses
(e.g., the costs) of these options are terminated. This is effective if
your aim is either "No Action" or "Extraction". Has the
community commented on the results of this screening method?
This comment addresses in situ treatment of groundwater, not soil, and is most
appropriately addressed in the draft final FS and proposed plan for
groundwater at Site 24.
3j
J. Table 2-8/Page 2-49 - "iron filings"... "Difficult to implement
due to the depth of groundwater at Site 24." (N.B. -100 ft to
groundwater, page Bill - 24). With this one comment, this option
is sunk. Could the difficulty to implement this option cost
> $15,000,000 to overcome?
This comment addresses treatment of groundwater, not soil, and is most
appropriately addressed in the draft final FS and proposed plan for
groundwater at Site 24.
3k
K. Page 3-2 - By this point, in situ methods are gone from feasibility
consideration. In situ methods are typically 1/10 the cost of
comparable ex situ treatments. Why has this approach been
eliminated without careful, detailed review?
This comment addresses in situ treatment of groundwater, not soil, and is most
appropriately addressed in the draft final FS and proposed plan for
groundwater at Site 24.
(table continues)
0»18»7 12:48 PM Mm tW«rd_p-1V«pO(U\cto135Vo*rtW*dnnrMN)C»omUdoe
Page?
-------
Responses to BCT Member (continued)
Comment Origin: Comments on the Site 24 RI Report, provided by letter from Charles R, Bennett, Ph.D., dated January 28,1996
I perceive a problem in the RI report dated 20 February 1996. Please
note the 1,1,2-TCA and/or 1,2-DCA citations on the following pages
in the report:
4-12
4-46
4-62
4-67
4-77
5-3
5-4
One or both of these compounds has been found in multiple locations
in the soil gas analyses, the soil analyses, and the groundwater
analyses. Only in the groundwater has its origin been questioned, and
concluded to be a sample contamination. This, of course, can (and
should) be confirmed in the travel blanks in the full report appendices
to determine if their conclusion is substantiated. Yet, this does not
close the case.
The chart on page 5-3 is not complete, it has no origin for 1,1,2-TCA.
Moreover, I would suggest a reference should be provided to
substantiate the hypothesis of the conversion of 1,2-DCE to 1,2-DCA.
The text (5.12) provides no guidance.
What is the consequence? Rather serious, as the presence of 1,1,2-
TCA and/or 1,2-DCA requires another chlorinated hydrocarbon source
[sic] in addition to PCE and 1,1,1-TCA to have been present. One
candidate might be 1,1,2-TCA that has been there from the beginning,
at low levels.
1,2-DCA was reported in 3 of the 292 Phase II soil gas samples at a maximum
vapor concentration of 6 ng/L. 1,1,2-TCA was reported in 2 of the '
292 Phase II soil gas samples at a maximum vapor concentration of 2 ug/L and
in 3 of 205 Phase II soil samples at a maximum vapor concentration of
5.9 ng/kg.
The primary VOC source is TCE. Within the footprint of the TCE soil gas
plume, several other VOCs are present. The figure on Page 5-3 of the Draft
Phase II RI is titled "Potential Chemical and Biological Transformation
Pathways of the PCE/TCE Group." Please note that the figure was updated in
the Draft Final Phase II RI.
In addition to potential chemical or biological transformation, the Draft Final
Phase II RI also states that other VOCs may have been released with the TCE
as impurities found in industrial-grade solvents. However, as explained in the
response to question la, these other VOCs would only be considered VOCs of
concern for the vadose zone ROD if they have the potential to contaminate
groundwater above the MCLs. The concentration levels of 1,1,2-TCA and
1,2-DCA are not high enough to contaminate groundwater above the MCLs,
and these chemicals are therefore not VOCs of concern for the vadose zone
ROD.
(table continues)
0*18/97 12.48 PM Mm tVwordj>-1Vipa>Wclo139n9«iiM2«dRAiiNx«enit(.doe
Paged
-------
Responses to BCT Member (continued)
Acronyms/Abbreviations:
ARARs - applicable or relevant and appropriate requirements
BCT - BRAG Cleanup Team
BRAC - Base Realignment and Closure
CERCLA - Comprehensive Environmental Response, Compensation, and Liability Act
CLEAN - Comprehensive Long-Term Environmental Action Navy
OCA - dichloroethane
DCE - dichloroethene
DTSC - Department of Toxic Substances Control
FS - Feasibility Study
IAFS - Interim Action Feasibility Study
MCLs - maximum contaminant levels
\iglL - micrograms per liter
mL - milllliter
OU - Operable Unit ,
PCE - tetrachloroethene
RAB - Restoration Advisory Board
Rl - Remedial Investigation
ROD - Record of Decision
SVE - Soil vapor extraction
TCA - trichloroethane
TCE - trichloroethene
TDS - total dissolved solids
U.S. EPA - United States Environmental Protection Agency
VOA - volatile organic analysis
VOCs - volatile organic compounds
09/18/97 12:48 PM urn );Vword_p-1V«pacti\Gto135to«ite2«dnin«N)etomU.doc
Page 9
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ATTACHMENT A
ADMINISTRATIVE RECORD FOR SITE 24 VADOSE ZONE
-------
TECHNICAL DOCUMENTS
-------
DATE - 09/19/17
PAGE -
TECHNICAL DOCUMENTS-OU2A. SITS 24, SOIL CLEANUP. MCA3 EL TORO
UIC No. DOC. NO.
DOCUMENT. TYPE.. .
CONTR/QUID. .NO. .
API MuX.I. OP. PAGES
M600SO 000020
RPT
OOUVUOOOOOOOOOO
0200
M60050 000168
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0002
M60050 001152
LTR
000000000000000
0005
M600SO 000793
LTR
000000000000000
001*
PRC.DATB
DOC. DATE
CTO.NO..
SPA.CATI
10/29/93
01/01/01
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03.4
06/26/95
01/01/01
ooooo
01.1
11/01/93
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01.2
FROM
FROM. SIGNATURE
TO
TO. SIGNATURE
OCDW
k.L. HERNDON
NAVY
J. B. LEAP
MCAS EL TORO
COMMANDINO OFFICER
NAV PORT HUEIiLME
OCHD FOUNTAIN VALLEY
N.L. RICHARDSON
CRWQCB RIVERSIDE
J.R. BENNETT
•PA WASHINGTON DC
NEESA PORT HUENEMB
B.B. LUKCKER
SOUTHWEST DIVISION
DHS LOS ANGELES
S. SIMPSON
MCAS EL TORO
W.L. HOEY
EPA SAN FRANCISCO
L. MARTIN
MCAS fcL TORO
EPA SAN FRANCISCO
J. JOHNSON
MCAS EL TORO
SUBJECT
PHASE II REPORT - ADDITIONAL INVESTIGATION AND
REMEDIATION OF TRICHLOROBTHYLENB CONTAMINATION IN THE
VICINITY OF THE MCAS EL TORO
RESPONSE TO COMMENTS RCRA FACILITY ASSESSMENT REPORT
FROM EPA 4 DTSC
INITIAL ASSESSMENT STUDY OF MCAS EL TORO
TRICHLOROETHYLENE TETRACHLOROSTHYLENB IN THS
OROUNDWATER BASIN IN THS IRVINE AREA
DRAFT GUIDELINES FOR GROUNDWATBR CLASSIFICATION UNDER
TNI EPA URgUNDNATKR PROTECTION STRA08TY
INITIAL ASSESSMENT STUDY OF MCAS EL TORO
COMMENTS ON THE INSTALLATION ASSESSMENT STUDY OF
MCAS EL TORO
COMMENTS ON THE REVIEW OF INSTALLATION ASSESSMENT
STUDY OF MCAS EL TO
REVIEW COMMENTS ON THE INITIAL ASSESSMENT STUDY
CLASSIFICATION
ADMIN RECORD
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
ADMIN RECORD
ADMIN RECORD
ADMIN RECORD
ADMIN RECORD
ADMIN RECORD
KEY WORDS
GW
TCB
TECH/GUID
COMMENTS
RFA
TECH/OUID
PA
TECH/OUID
NFA
TCB
GW
TECH/OUID
ON
EB/CAC)
GUID
TECH/GUID
DOC.
DOC.
DOC.
DOC.
DOC.
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EB/CACI
AM EL TORO
TECH/OUID DOC.
NFA
COMMENTS
TECH/CUID
NFA
COMMENTS
IAS
TECH/QUID
NFA
COMMENTS
IAS
TECH/QUID
NFA
DOC.
DOC.
DOC.
...Sit*...
Location
...
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
1.2.1.4.6,
(,7,1,9,10
11.12.13,
14,15,16,
17,11,19,
20,21,22
OU1.0U2,
OU2A.OU2B,
OU2C, OU1
OU1
4,7,11,11.
14,19,20
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4,7.11,11,
14,19,20
OU3
SOUTHWEST DIVISION
NCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
HCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
OU1,1« SOUTHWEST DIVISION
MCAS EL TORO
OU1
4,6,7,8,10
12.11,15
OU1
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Tha Administrative Record (AR) Index Include* reference* lu document* which die bicltographlcil source*.
Th«4«tt|>l*vraptoctoUon*amconiMarMtobe
-------
DATE • 09/19/97
TECHNICAL DOCUKEHTS-OU2A, BITS 24, SOIL CLEANUP, MCAS BL TOHO
PACE
DOCUMENT, TYPE. .
CONTR/OUID NO
APPRO! I OF PAGES
M600SO 000225
DATA
000000000000000
0018
HCOOSO 001115
LTR
000000000000000
0001
M600SO 001116
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DOC. DATE
CTO WO
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06/10/94
05/29/87
00000
04.4
12/22/95
01/10/88
OOUUO
10.1
12/22/95
04/08/88
00000
10.1
07/07/»5
06/20/88
00000
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12/22/95
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10/29/91
01/01/90
00018
01.1
PROM.SIQNATUMB
TO .
TO.SIGNATUXB
MCAS BL TORO
J.R. APPLEGATB
MCM WASHINGTON D.C.
MCAS EL TORO
S.R. HOLM
OICC SOUTHWEST
MCAS BL TORO
D.V. SHUTER
CITY OF IRVINE
L. AORAIN
EPA SAN PRANCIBICO
J. CLIFFORD
MCAS EL TORO
BO Sllt/ntR
EPA SAN PRANISCO
J. ANDERSON
WESTERN DIVISION
H.H. BOSSERT
JMM
J. OOODBLL
MCAS BL TORO
OCWD
J. RSILLY
JACOBS ENGINEERING
SOUTHWEST DIVISION
SUBJECT CLASSIFICATION
VOLATILE ORGANIC COMPOUNDS (VOC) COMPLIANCE. ADMIN RECORD
MEMBERSHIP FOR THE MCAS EL TORO TRC IS BBINO SOUGHT ADMIN RECORD
MEMBERSHIP FOR TUB MCAS EL TORO TRC IS BBINO SOUGHT ADMIN RECORD
CORRESPONSECE RBCARDINO PLACEMENT OF MCAS BL TORO ON ADMIN RECORD
THE NPL
DOCUMENTATION FOR FACILITIES PROPOSED FOR INCLUSION OH ADMIN RECORD
THE NATIONAL PRIORITIES LIST
SITE INSPECTION FLAN OF ACTION IRP MCAS TUfTIN AND ADMIN RECORD
EL -luRO
PHASE I REPORT INVESTIGATION OF TRICHLOROETHYLENE ADMIN RECORD
CONTAMINATION IN THE VICINITY OF THE MCAS BL TORO
IMPLEMENTATION PLAN - WORK PLAN FOR A REMEDIAL ADMIN RECORD
INVESTIGATION/FEASIBILITY STUDY AT THE MCAS, BL TORO
KEY WORDS
VOA
TECH/OUID DOC.
NFA
THC
TECH/OUID DOC.
TRC
TBCH/OUID DOC.
NPL
TECH/OUID DOC.
NPA
NPL
TBCH/OUID DOC.
NPA
• I
BB/CAJM
TECH/QUID DOC.
NFA
TBCH/OUID DOC.
NFA
i
RI
PS
TECH/GUIO DOC.
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OU1
OU1
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1,3.1.1.*
7.9,10,11
11. 14. 1C.
17,4,19,8
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OU2C.OU1,
OU2
001 .
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001
004
005
00«
007
008
009
010
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012
Oil
014
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS EL TORO
This Admlni»t»tlvt Record (AH) IndM IndudM rataranct* to documents which ctta bibliographical I
TIWJM bJbliOQraphto ckauora am coi^dlaftd to b« part of this ARbutmaynotUclt«
-------
DATE • 09/19/17
UIC No. DOC.NO.
DOCUMENT.TYPE...
CCNTR/OUID..NO. .
PAUtl »
PRO. DATE PROM
DOC. DATE FROM.SIGNATURE.
CTO.KO.. TO
TECHNICAL DOCUNENTS-OU3A. 81T8 24. SOIL CLEANUP. MCAS BL TORO
,. SUBJECT CLASSIFICATION KEY HOWS
.Sit*...
.Location.
APPRO*.».OP.PAGES EPA.CAT* TO.SIGNATURE.
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016
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10/29/93
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REVISED IMPLEMENTATION PLAN • NORK PLAN FOR A REMEDIAL ADMIN RECORD
INVESTIGATION/FEASIBILITY STUDY AT TUB MCAS. BL TORO
RI
PS
TECH/QUID DOC.
001
002
003
004
DOS
00«
007
008
009
010
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013
014
01S
016
017
01*
019
GOUTHMRST DIVISION
MCAS BL TORO
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10/29/93
04/04/90
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01.1
JACOBS ENGINEERING
SOUTHWEST DIVISION
REVISED IMPLEMENTATION PLAN FOR REMEDIAL INVESTIGATION
AND FEASIBILITY STUDY WORK PLAN FOR MCAS EL TORO
REVISED PER MODIFICATION 103 (16 MAHCH 1990)
ADMIN RECORD
RI
PS
TECH/QUID DOC.
NPA
SOUTHWEST DIVISION
MCAS EL TORO
M600SO 00001*
RPT
N6I711*9D929«
0200
10/29/93
04/09/90
0001*
03.3
JACOBS ENGINEERING
SOVTMWEST DIVISION
DRAFT SUMMARY REPORT - COMfMEHEMblVS HORK PLAN FOR
REMEDIAL INVESTIGATION/FEASIBILITY STUDY AT
MCAS EL TORO
ADMIN RECORD
RI
PS
TECH/OUID DOC.
NFA
this Administrative Record (AR) Index Includes references to document! which cite bibliographical sources.
Thi*» bibliographic cttajon* are cprujJdtrtf to of p*rttftW*ARb«mayncd«x
001
002
003
004
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006
007
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012
013
014
015
016
017
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019
020
021
•OVHHBST DIVISION
-------
DATS - 09/19/97
TECHNICAL DOCUMENTS-OU2A, 8XTB 34. SOIL CLBMIUP, MCAS EL TWO
PAGE
DOCUMENT. TYPE. .. DOC. DATE FROM. SIGNATURE
CONTR/GUID NO . CTO MO TO SUBJECT
APPROX.I. OF. PACES EPA.CATI TO SIGNATURE '
M60050 000016 continued
CLASSIFICATION KEY HOWS ...Site location
023
M60050 000023
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10/29/93
09/10/90
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03.1
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COMPREHENSIVE NORK PLAN FOR REMEDIAL INVESTIGATION/
FEASIBILITY STUDY AT MCAS EL TORO
ADHIN RECORD
RI
SAP
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VOC
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00-3
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003
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10/29/93
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DRAFT REMEDIAL INVESTIGATION FEASIBILITY STUDY NORK
PLAN - CTO lOOli AT MCAS EL TORO
ADMIN RECORD
RI
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MoOOSO 000995
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000000000000000
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10/06/9S
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01.6
EPA SAN FRANCISCO
MCB CAMP PENDLETON
FEDERAL FACILITY AGREEMENT UNDER CERCLA SECTION 120
MCB CAMP PENDLETON ALSO USED IN SUPPORT OF THE MCAS
EL TORO EB/CA FOR SITES 4.7,11.13.14,19 t 20
ADMIN RECORD
FFA
EB/CA(•)
TECH/QUID DOC.
4,7,11.13, SOUTHWEST DIVISION
14,19,20 MCAS EL TORO
This Administrative Reword (Aft) Index Includes references to documents which cite bibliographical source*.
TheMb&lioo/aphJc cations ere COASMP^ lo to
-------
DATE - 09/19/9V
PACE -
TECHNICAL DOCUMENTS-OU2A, Sin 24, SOIL CLEANUP. MCAS BL TORO
UIC No. DOC. NO.
DOCUMENT. TYPE. . .
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DOC. DATE
CTO.NO. .
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.03/03/94
11/01/90
00000
07.1
04/05/95
01/22/91
DO 21
04.2
04/05/95
02/28/91
00018
03.3
08/30/95
02/28/91
00018
03.1
FROM '
FROM. SIGNATURE
TO SUBJECT
TO. SIGNATURE
SOUTHWEST DIVISION MCAS EL TORO INSTALLATION RESTORATION PROGRAM
ENVIRONMENTAL STATUS REPORT SITB HISTORY
SOUTHWEST DIVISION
FILE
t
DAMES h HOORB DRAFT FEASIBILITY STUDY MCAS BL TORO
SOUTHWEST DIVISION
JACOBS ENGINEERING DRAFT FINAL RI/FS WORK PLAN MCAS BL TORO
E. ROGER
SOUTHWEST DlVISIOn
JACOBS ENGINEERING DRAFT FINAL SAMPLING AND ANALYSIS PLAN
J. DUIEOONSKI
SOUTHWEST DIVISION
CLASSIFICATION KEY WORDS
ADMIN RECORD 81
TC8
RI
FS
IRP
TECH/QUID DOC.
NFA
ADMIN RECORD FS
TBCH/GUID DOC.
NFA
ADMIN RECORD RI
FS
TECH/GUI D DOC,
NFA
ADMIN RECORD SAP
TECH/QUID DOC.
NFA
. . .sic*. . .
1
2
3
4
S
6
7
10
11
11
12
11
14
15
16
17
18
19
20
21
22
23
OU1
002
003
004
OU1.0U2
18.2,3,5,
10,1, 00 3
4,6.7,8,9,
11,12,13,
14,15,16,
1*, 20, 21,
22
OO1.OO2,
OU3
11.2,3,5.
10.17,1,4,
6,7,8,9,11
12,13,14,
15,16,19,
20.21,22
• • • • Loot ton . . .
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTKWK8T DIVISION
MCAS BL IvRO
This Administrative Record (AR) Index Includes references to documents which ate bibliographic*! sources.
These biographic citation* ere consWtrad to be part of this AR bumaynotbecttedsepwatelylnthelndex.
-------
DATE - 09/19/97
PAGE
TECHNICAL DOCUMENTS-OU2A, SITS 24. SOIL CLEANUP, HCAS BL TORO
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DATE - 09/19/97
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HUMAN HEALTH RISK ASSESSMENT FOR 00 1
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001
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013
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016
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020
021
022
SOUTHWEST DIVISION
MCAS EL TORO
This Administrative Record (AR) Index Includes references to documents which cite bibliographical sources.
These bibliographic citations are considered to be part ol this AR but may not be ctted separately In Ihe index.
-------
CATS - 09/19/97
PAGE
TECHNICAL DOCUMBNTS-OU2A, SITS 24, SOIL CLEANUP, MCAS U> TOKO
UIC Ha. IOC. NO.
DOCUMENT. TYPE. . .
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11/01/91
OS/07/91
00145
01.1
11/01/91
05/07/91
00145
01.1
04/05/95
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SOUTHWESTDIV
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A. PISZKIN
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J. J. ZAHNOCH
EPA
SUBJECT CLASSIFICATION
PHASB I REMEDIAL INVESTIGATION DRAFT TECHNICAL MEMO ADMIN RECORD
MCAS EL TORO VOLUME III
.
PHASB I MkMEDIAL INVESTIGATION DRAFT TECHNICAL MEMO ADMIN RECORD
MCAS EL TORO VOLUME IV
t
PHASB I RI DRAFT TECHNICAL MEMORANDUM VOLUME I k III ADMIN RECORD
AND IV
IDENTIFICATION OK STATb -APPLICABLE' OR 'RELEVANT AND ADMIN RECORD
APPROPRIATE* REQUIREMENTS (ARARs) FOR THE REMEDIAL
INVESTIGATION AND FEASIBILITY STUDY MCAS EL TORO
ENVIRONMENTAL HEALTH HAZARD ASSESSMENT OF THE CALIF. ADMIN RECORD
ENVIRONMENTAL PROTECTION AGENCY (CALEPA) MEMORANDUM
ENTITLED 'CALIFORNIA CANCER POTENCY FACTORS*
KEY WORDS
RI
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MONITORING
TBCH/OUID DOC.
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RI
CB/CAI* I
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RI
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001
004
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006
007
001
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012
013
014
015
016
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019
020
021
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4.7.11,11,
14,19,20
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6,7,8,9,10
11,12,13.
14,15.16.
17,18.19.
20.21, OU1
OU2.OU1
OUI.O03.
OU1, 1,2,1,
4,5,6,7,8,
9,10.11.12
11.14,15,
16.17,18,
19,20,21
22,24,25
25,26,27
• » . . LocACion. . . .
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS SL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Thii AdmintoUative Record (AR) Index Include* reference* to documents which cite bibliographical sources.
r.ipNcciUtkrawconi^ridto^
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DATE - 09/19/97
TECHNICAL DOCUMENTS-OU2A. SITE 24, SOIL CLEANUP. MCAS EL TORO
PAGB - 9
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12/22/95
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DTSC SACRAMENTO
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SOUTHWEST DIVISION
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PUBLIC INTEREST
EPA
PUBLIC
SAIC
SOUTHWEST DIVISION
JACOBS ENGINEERING
J. DOLEOOWSKI
SOUTHWEST DIVISION
EPA SAN FRANCISCO
J.A. HAMILL
SOUTHWEST DIVISION
A. PISZKIN
HCAS EL TORO
J.P. CHESSUN
EPA SAN FRANCISCO
J. HAMILL
SUBJECT
USB OP CLAIPORNIA CANCER POTENCY FACTORS FOR HCAS
EL TORO WITH STAFF REPORT i INITIAL STATEMENT OF
REASONS FOR PROPOSED RULEMAKINO
FINAL REPORT AEHIAL PHOTOGRAPH ASSESSMENT MCAS
EL TORO
FACT SHEET "PRESUMPTIVE UMSDIESiSITB CHARACTERIZATION
AND TECHNOLOGY SELECTION FOR CERCIA SITES WITH
VOLATILE ORGANIC COMPOUNDS IN SOILS
PRESUMPTIVE REMEDIES t POLICY AND PROCEDURES QUICK
REFERENCE FACT SHEET
FINAL REPORT AERIAL PHOTOGRAPH ASSESSMENT MCAS EL TORO
DQO MERINO MINUTES WITH REGULATORY AGENCIES
REQUEST FOR REMOVAL ACTION AT AQUA CHINON WASH, AND
FOR TIMELY SOIL GAS SURVEY
DRAFT SAMPLING AND ANALYSIS PLAN, WORK PLAN. QUALITY
ASSURANCE PROJECT PLAN, AND HEALTH AND SAFETY PLAN FOR
PHASE II OF THE RI SENT FOR REVIEW 4 COMMENTS W/0 U4CL
CLASSIFICATION
ADMIN RECORD
ADMIN RECORD
ADMIN RECORD
ADMIN RECORD
COMPENDIUM
AU4IN RECORD
ADMIN RECORD
ADMIN RECORD
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
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SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS EL TORO
4,7,11.13. SOUTHWEST DIVISION
14.19,20 MCAS BL TORO
OU1,1« SOUTHWEST DIVISION
24.12
OU2.OU2A
OU3
1.2.3,4,5,
(.7,1,9,10
11.13,14,
15,16.17.
11,19,20,
21,22,25
OU1 SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
This Administrative Record (AR) Index Include* references to document* which cite bibliographical aource*.
These piblioQraphic dUUoru are con»Wered to be part of tni» AR but may not be cited Mparaiely in the index.
-------
DATE - 09/19/97
TECHNICAL DOCUMENTS-OU2A, SITE 34. SOIL CLEANUP. MCAS EL TORO
PAGE
DOCUMENT. TYPE. . .
CONTR/CJUID NO
APPROX . 1 . OP . PAGES
M600SO 000714
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TO. SIGNATURE
JACOBS ENGINEERING
M. BITNER
SOU1HWBST DIVISION
CH2M HILL
J. DOLEOOHSKI
SOUTHWEST DIVISION
DTSC LONG BEACH
J.J. ZARNOCH
SOUTHWEST DIVISION
W.A DOS SANTOS
.IACOBS ENniHBERINO
SOUTHWEST DIVISION
JACOBS ENGINEERING
J. DOLEOOHSKI
SOUTHWEST DIVISION
JACOBS ENGINEERING
M. BITNEM
SOUTHWKsl DIVISION
JACOBS ENGINEERING
SOUTHWEST DIVISION
JACOBS ENGINEERING
SOUTHWEST DIVISION
JACOBS ENGINEERING
M. ARENDS
SOUTHWEST DIVISION
R. GREEN
SUBJECT
PHASE II RI/FS DRAFT WORK PLAN MCAS EL TOKO
VOLUME I. II, III APPENDIX A DATA QUALITY OBJECTIVES
SITES 12 THRU 25
RI CONCEPTUAL APPROACH AND RESPONSE TO COMMENTS SOIL
OAS SURVEY FOR SITES 24 I 35
RESPONSE TO THE REQUEST FOR THE IDENTIFICATION OF
STAl'fc AkAR« FOR TUB RI/FS FOR OU 1
DRAFT SOIL OAS SURVSY WORK PLAN RI/FS IRP SITES 24
* 35 MCAS EL TORO
FINAL SOIL GAS SURVEY WORX PLAN SITES 24 4 25
REVISION 0
RI REPORT DRAFT OU 1 RI/FS MCAS EL TORO
1) JUNE 1994 SOIL OAS INVESTIGATION MEETING RI/FS
TECHNICAL EXHANGE MEETING
INTERVIEW WITH ACTIVE AND RETIRED PERSONNEL FROM MCAS
EL TORO REGARDING PROCEDURES FOR STORAGE AND DISPOSAL
OP HAZARDOUS MATERIALS AND HASTE
CLASSIFICATION
ADMIN RECORD
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
KEY WORDS
RI
PS
EE/CACI
TECH/GUID DOC.
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TECH/OUID DOC.
NFA
ARAR
EE/CA(«)
TECH/GUID DOC.
RI
FS
T8CH/OUID DOC.
NFA
TBCH/GUID DOC.
NFA
II
TECH/GUID DOC.
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MTO MINS
TECH/GUID DOC.
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TECH/OUID DOC.
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DISPOSAL
AM EL TORO
TBCH/GUID DOC.
NFA
. . .Site. . .
4,7,11.13,
14,19,30
34,35
OU1.16
34,35
24,35
OU1
4,7,11,13.
14.19.20
5.2.17,3,4
13,10,9,8,
13,1,3,5,7
11,14,15,
1C, 19,21,
22,
OU1.OU2
OU2A.OU2B
OU2C.OU3
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
This Administrative Record (AR) index Includes reference! to document* which cite biWiograplilcal sources.
TheMbibltogriph«cAUiWMccindde
-------
DATE - 09/19/91
PAGE •
TECHNICAL DOCUKBNTS-OU2A. 8IT8 24, SOIL CLEANUP, MCAS IL TOKO
DOCUMENT. TYPE. . .
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DOC. DATE
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07/19/94
07/01/94
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JACOBS ENO. REPORT RI/PS
MCAS EL TORO
SOUTHWk.i>l' DIVISION INSTALLATION RESTORATION PROGRAM REMEDIAL
JACOUS ENO. INVBSTIQATION/tLASIBILm STUDY DRAFT OPERABUt UNIT I
MCAS EL TORO REMEDIAL INVESTIGATION REPORT.
JACOBS ENGINEERING ADDENDUM TO TUB DRAFT OU-1 INTERIM- ACTION F8 REPORT
J. DOLEOOHSKI
SOUTHWEST DIVISION
BECHTEL NATIONAL INC FINAL DATA MANAGEMENT PLAN PHASE II RI/FS
T.U. LATAS
SOUTHWEST DIVISION
BECHTBL NATIONAL INC FINAL HEATH AMD oAFETY FLAN SUPPLEMENT PHASE XX RX/F8
T.H. LATAS
SOUTHWEST DIVISION
BECHTBL NATIONAL INC REVISED DRAFT NuftX PLAN PHASE II RI/FS
T.H. IATAS
SOUTHNKST DIVISION
BECHTBL NATIONAL INC DRAFT PIKLD SAMPLING PLAN PHASE II RI/FS
T. LATAS
SOUTHWEST DIVISION
CLASSIFICATION KEY WORDS
ADMIN RECORD RI
PS
00
HA
TECH/QUID DOC.
ADMIN RECORD RI
PS
ou
TECH/QUID DOC.
UFA
ADMIN RECORD FS
INFO REPOSITORY TBCH/OUID DOC.
ADMIN RECORD DMP
INFO REPOSITORY RI
FS
TECH/OUID DOC.
NFA
ADMIN RECORD H48P
INFO REPOSITORY TECH/OUID DOC.
ADMIN RECORD RI
FS
TBCH/OUID DOC.
NFA
ADMIN RECORD RI
FS
TECH/GUID DOC.
NFA
.. .site. . .
001
OU1
001
001
OU1.OU2.
OU2A.OU2B
OU2C.OUI
2,1,4.5.6.
7.8.9.10,
11,12,1),
14. 16, It.
17.19,20.
21.22.24.
25
001
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001,002
001,1,2,1,
4.5,6,7,8
9,10,11,12
11,14,15
16,17,18
19,20.21
22. 2), 24
25
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
Thi» Administrative Recui J (AR) Index Includes references to documents which cite bibliographical sources.
These biblMflraphfc ciUUons are considered to be part of this AR but may not be cttod separately In the Index.
-------
DATE - 09/19/97
TECHNICAL DOCUMENTO-OU3A, 8ITB 34. SOIL CLEANUP, NCAS BL TOKO
PAOB • U
UIC No. DOC. NO.
DOCUMENT. TYPE. . .
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PRC.DATB
DOC. DATE
CTO.NO. .
KPA.CATt
02/09/96
01/01/95
00059
02.7
01/37/95
01/17/9S
OOOS9
01.1
02/09/9C
01/11/tS
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01.5
10/01/96
04/06/95
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07/01/95
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01/11/96
07/01/95
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FROM. SIGNATURE
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BECKTEL NATIONAL INC SUBMITTAL OP DRAFT QUALITY ASSURANCE PROJECT PLAN FOR
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SOUTHWEST DIVISION
J. ASHMAN
BECHTEL NATIONAL INC REVISED DRAFT KORK PLAN PHASE II RI/FS MCAS EL TORO
T.N. LATAS
SOUTHMBST DIVISION
BBCHTBL NATIONAL INC FINAL HEALTH AND SAFETY SUPPLEMENT PHASB II RI/FS
J. KLBUSENBR AND RBSK4ISB TO COMMENTS ON HEALTH AND SAFETY
SOUTHWEST DIVISION SUPPLEMENT
J. ASHMAN
BNI SAN DIEGO FINAL DATA MANAGEMENT PLAN
C. CARLISLE
SOUTHWEST DIVISION
BECHTEL NATIONAL INC FINAL WORK PLAN PHASE II RI/FS
T.N. LATAS
SOUTHWEST utVISION
BECHTEL NATIONAL INC FINAL WORK PLAN PHASE II RI/FS
T. LATAS
SOUTHWEST DIVISION
CLASSIFICATION KEY WORDS
ADMIN RECORD RI
INFO REPOSITORY FS
TSCH/OUID DOC.
UFA
ADMIN RECORD RI
INFO REPOSITORY PS
TBCH/OUID DOC.
NPA
ADMIN RECORD HUP
INFO REPOSITORY COMMENTS
TECH/GUI D DOC.
NPA
ADMIN RECORD DATA
INFO REPOSITORY OA
OC
TBCH/OUID DOC.
UFA
ADMIN RECORD RI
rs
TBCH/OUID DOC.
NFA
ADMIN RECORD RI
FS
TECH/CUID DOC.
NFA
. . .Sit*. . .
oua.oui.i
2.1.4.5.6.
7.1.*, 10
11.12.11
14.15.16
17,19,30
21.33.34
35
OU3.0U1
OU2.OU1.1
3.1.4.S.4
7.1,9,10
11,13,11
14,15,16
17,19.20
31,32,24
25
OU1.0U3,
OU3A.OU2B
OU2C.OU1
1,3,1,4,5,
6,7,1,9,10
11.12,11,
14,15,16,
17,19,20,
31,33,24
35
OU3A.OU3B
OU1
1.3,4,6,7
8.1.10.11
13,11,14,
16,17,19
30,31,33
34.35
• . i , L
-------
DAT* - 09/19/97^
PAGE • 11
TECHNICAL DOCU4ENTS-OU2A, SITS 34, SOIL CLEANUP. MCAS EL TORO
DIG No. DOC. NO.
DOCUMENT. TYPE. .
CONTR/GUID NO
APPROX I.OF PAGES
M600SO OOlo /O
PLAN
N687M92D4670
OOSO
MC0050 OOOV49
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H600SO 001-ibS
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PRC.UAl'K
DOC. DATE
CTO NO. .
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09/10/96
07/11/9S
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04.4
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07/14/9S
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01/22/9*
01/01/95
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02/09/9*
01/01/95
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02/09/96
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01/19/Vb
08/01/95
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OS/21/96
08/01/95
00059
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FROM
FROM. SIGNATURE
TO SUBJECT
TO. SIGNATURE
BNI SAN DIEOO FINAL INVESTIGATION-DERIVED NASTB MANAGEMENT PLAN
T. LATAS
SOUTHWEST DIVISION
HCAS EL TORO NOTICE OP JULY 27, 199S RAB MEETING
J. JOYCE
RAB MBMfciWS
BBCHTEL NATIONAL INC FXHAL FIELD SAMPLING PLAN PHASE II RI/F8
T.W LATAS
SOUlliWKST DIVISION
BECHTEL NATIONAL INC FINAL QUALITY ASSURANCE PROJECT PLAN,
J. KLBUSENER PHASE II RI/F8
SOUTHWEST DIVISION
J. ASHMAN
BECHTEL NATIONAL INC RESPONSE TO COMMENTS, DRAFT QUALITY ASSURANCE PROJECT
J. KLEUSENER PLAN PHASE II RI/F8
SOUTHWEST DIVISION
J. ASHMAN
BECHTEL NATIONAL INC FINAL QUALITY ASSURANCE PROJECT PLAN PHASE II RI/FS
D. COHSER
SOUTHWEST DIVISION
J. ASHMAN
BECHTEL NATIONAL IMC FINAL RISK ASSESSMENT WORK PLAN
T. LAlAi (DOCUMENT SIGNED 8/29/951
JtOVTHHBST DIVISION
Tula A*4n.lMUi*Mllv,A B*f***A /A.Q1 InrtAv InrJitfta* mtamneM to doeilfnAfltA Mlh
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
Jch etta blhliooraohica
KEY MORDS
INVESTIGATION
TKCH/OUID DOC.
NFA
RAB
TECH/QUID DOC.
RI
rs
TBCH/OUID DOC.
NFA
QAPP
•I
FS
TECH/GUID DOC.
HFA
RI
FS
OAPP
COMMENTS
TECH/OUID DOC.
NFA
QAPP
TECH/GUID DOC.
NFA
RISK
TECH/QUID DOC.
NFA
1 tourcei
. . .Sit*. . .
I DUMP
OU1.OU2,
OU2A.OU2B
OU2C, OU1
1,2,3,4,5,
6,7,»,9,10
11,12.11,
14.1&.16,
17,19,20,
31.32,24,
25
OU3,OU1,1
3,1,4,5,6
7,i,9,10
11,13,11
14,15,16
17,19,30
.31.33,34
35
OU3.0U1.1
2,1,4,5,6
7,8,9,10
11,12,11
14.15,16
17.19,20
31,22,24
35
OU3,OU1.1
3,1,4,5,6
7,6,9,10
11,12,11,
14.15,16
17.19,20
21,22,24
25
OU1.0U2A
OU2B.OU2C
001.1.3,1,
4.5,6, 7,1,
9.10,11.13
.... Locat ion
SOUTHWEST DIVISION
HCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Tha^biWwQraphteaultoMamconsMwritob*
-------
DATE - 09/19/91
PAGE • M
TECHNICAL DOCUMENTS-OU2A, SITI 24. SOIL CLEANUP, MCAS BL TOKO
UIC NO. DOC. NO.
DOCUMENT. TYPE...
CONTR/CUID. .NO..
APPROX 1 OF. PAGES
PRC.DATB
DOC. DATE
CTO.NO..
EPA.CATI
FROM
PROM. SIGNATURE
TO
TO. SIGNATURE
SUBJECT
CLASSIFICATION
KBY WORDS
M600SO 00146S continued
M60050 001242
RPT
N6I71192D4670
0002
M60050 001341
HISC
000000000000000
0007
M600SO 001352
HISC
N6H71192D4670
000)
M60050 001170
RPT
N6I71192D4C70
0130
M600SO 001371
MISC
N6871192U4670
0020
M600SO 00156?
MM .
000000000000000
0005
02/01/96
08/16/95
00059
03.2
03/11/96
09/06/95
00076
03.6
03/11/96
09/06/9S
000(0
10.0
03/19/96
09/06/96
OOOS9
08.0
03/19/96
09/06/95
00059
10.1
07/11/96
09/06/95
00000
01.1
BECHTEL NATIONAL INC
D. COMSEK
SOUTHWEST DlVISIuN
J. ASHMAN
BECHTEL NATIONAL INC
T. LATAS
SOUTHWEST i-IVISION
BECHTEL NATIONAL INC
D. TEDALOI
SOUTHWEST DIVISION
J. ASHMAN
BECHTIL NATIONAL INC
U. COMSEft
SOUTHWEST DIVISION
J. ASHMAN
BECHTEL NATIONAL INC
D. COWSER
SOUTHWEST DIVISION
J. ASHMAN
BECHTEL NATIONAL INC
K. LYONS
BCT HEHbbKS
FINAL FIELD SAMPLING PLAN PHASE II RI/FS
MEETING MINUTES FOR 6 SEPTEMBER 1994 WEEKLY BRAC
CLEANUP TEAM 1 i.k.TIMG HELD TO DISCUSS FINDINGS AND
INCISIONS REGARDING RI/FS AT SITES 2.3,5,17.24, AND 25
SUBMITTAL OF DNAFT FORMER EMPLOYEE INTERVIEW COMMENTS
OF 17 AUGUST 1995 CLEAN II AQ/OC FOR MCAS EL TORO
FINAL RISK ASSESSMENT WORK PLAN PHASE II RI/FS
RESPONSES TO VARIOUS AGENCIES COMMENTS ON THE FINAL
RISK ASSESSMENT WORKPLAN FOR PHASE II RI/FS
MINUTES FROM BRAC CLEANUP TEAM (BCT) MEETING HELD TO
DISCUSS FINDING OF OU-2 FIELD INVESTIGATIONS,
SCHEDULE OF Ul AWING INVESTIGATIONS, AND BCT DECISIONS
ADMIN RECORD
IKKO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN M6CORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
RI
FS
TECH/GUID DOC.
NFA
RI
FS
MTG MINS
BCP
TECH/OUID DOC.
NFA
COMMENTS
TECH/GUID DOC.
NFA
RISK
RI
FS
TECH/GUID DOC.
NFA
RI
PS
COMMENTS
RISK
TECH/GUID DOC.
NFA
BCT
MTO MINS
TECH/GUID DOC.
NFA
...Sit«...
13.14.15
16.17.11
19.20.21
22.24.25
OU2.0U3.1
2,3.4,5,6
7,1.9.10
11.12.13
14.15.16
17,19,20
31.32.34
25
3.3.4.5.17
24,25
OU2.0U3.1
2.1,4,5.6
7, 1.9. 10,
11.12,13,
14,15,16
17,19,20
21,22.24
25
OU2.OU3.1
2,3.4,5,6
7.1.9.10
11.12.13
14,15.16
17,19,20
21,22,24
25
OU2.2.3.5
17,24.25
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
This Administrator* Record (AR) Index Includes references to document* which cite bibliographical sources.
These bibliographic citations are considered to be part of thto AR but rnay not be cited Mparaleiy In the Index
-------
DATS - 09/19/97v
PM» -
TECHNICAL DOCUMENTS-OU3A, SITE 24, SOIL CLEANUP. NCAS BL TORO
DOCUMU.i'.TYPE. . .
CONTR/GUID..NO. .
APPROX.I. OP. PAGES
H60050 001340
MISC
000000000000000
0015
M600SO GU1006
RPT
N6871189D9396
OiiSO
MbOOSO 001007
RPT
N6871169D9396
09SO
M600SO 001008
RPT
Nomi89D9396
0650
f.oUOSO 001675
XKTL
N6I71192D4670
UOOJ
M60050 001269
RPT
N6871192D4670
U2SO
M600SO 001270
RPT
N6871192D4670
02SO
H600SO 001271
RPT
N6871192D4670
0250
M600SO 001272
hW
N6871192D4670
02SO
M600SO 001274
MISC
N6871192D4670
0020
DOC. DATS
CTO.HO..
EPA. CAT*
03/18/96
09/13/95
Ouu/e
03.6
10/23/95
10/1 W9S
0014S
04.2
10/23/95
10/15/95
0014S
04.2
10/31/95
10/15/95
00145
04.2
10/01/96
12/16/95
00071
06.3
02/21/96
02/01/96
00073
03.0
02/21/96
02/01/96
00073
03.0
02/21/96
02/01/96
00073
03.0
02/21/96
02/01/96
00073
03.0
03/12/96
02/06/96
00000
11.1
FROM. SIGNATURE
TO
TO SIGNATURE
BECHTEL NATIONAL INC
T. LATAS
SOUTHWEST DIVISION
JACOBS ENaiNKERINO
SOUTHWEST DIVISION
JACOBS EWINEERINO
SOUTHWEST DIVISION
JACOBS ENOINCfRINO
SOUTHWEST blVliHUM
BNI SAN DIEOO
D. CUWSER
SOUTHWEST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
P. BROOKS
SOUTHWEST DIVISION
BECHTEL NATIONAL INC
P. BROOKS
SOUTHWEST DIVISION
BECHTEL NATIONAL INC
P. BROOKS
SOUTHWEST DIVISION
BECHTEL NATIONAL INC
P. BROOKS
SOUTHWEST DIVISION
UKCHTEL NATIONAL INC
D. COWSBR
SOUTHWEST DIVISION
\f. KENNEDY
SUBJECT
MEETIJtt MINUTES FOR 13 SEPTEMBER 199S BRAC CLEANUP
TEAM MSBTNO TO DISCUSS FINDINGS AND DISCUSSIONS K»
RI/FS AT fclTES 2.3.5,17,24, AND 25
FEASIBILITY STUDY (PS) REPORT DRAFT 00- 1 INTERIM-
ACTION RI/rS REVISION 0 VOLUME VII OF OU-1 RI/IAFS
REPORT APPENDICES B THROOQH J
FEASIBILITY STUDY (FS) REPORT .DRAFT OU-1 INTERIM-
ACTION RI/FS RLVISION 0 VOLUME VI OF OU-1 RI/IAFS
REPORT APPENDIX A QROUNDUATBR HODELINO REPORT
FEASIBILITY STUDY (FS) REPORT DRAFT OU-1 INTERIM-
ACT JU< RI/FS REVISION 0 VOLUME IV OF OU-1 RI/IAFS
REPORT
INVESTIGATION DERIVED HASTE, RI/FS FOR CTO-0073
AND CTO-0076, LETTER OF DECEMBER 19. 199S
DRAFT PHASr II REMEDIAL INVESTIGATION REPORT
OPERABLE UNIT 2A - SITE **
DRAFT PHASE II REMEDIAL INVESTIGATION REPORT
OPERABLE UNIT 2A - SITE 24
VOLUME II APPENDICES A-I
DRAFT PHASE II REMEDIAL INVESTIGATION REPORT
OPERABLE UN ll ./A - SITE 24
VOLUME III APPENDIX J
DRAFT PHASE II REMEDIAL INVESTIGATION REPORT
OPERABLE UNIT 2A - SITE 24
VOLUME IV APPENDICES K-P
MEETING MINUTES 30 JANUARY 1996 WEEKLY BRAC CLEANUP
TEAM (BCT) FOR PHASE II RI/FS MCAS EL TORO
. CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADHIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RSjCORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INtO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
RI
FS
MTQ MINS
BCT
TECH/QUID DOC.
NFA
FS
TECH/OUID DOC.
FS
OH
TECH/GUJD DOC.
FS
TECH/GUID DOC.
RI
FS
IDWMP
TBCH/OUIO DOC.
RI
OU
TECH/GUID DOC.
RI
OU
TECH/OUID DOC.
RI
OU
TECH/OUID DOC.
RI
OU
TECH/GUID DOC.
MTG MINS
BRAC
TECH/GUID DOC.
NFA
. . .Sit* Location. . .
2,3,5,17 SOUTHWEST DIVISION
24,25 MCAS EL TuXO
OU1 SOUTHWEST DIVISION
MCAS BL 10KO
OU1 SOUTHWEST DIVISION
MCAS EL TORO
001 SOUTHWEST DIVISION
MCAS EL TORO
S SOUTHWEST DIVISION
MCAS EL TORO
OU2A,24,25 SOUTHWEST DIVISION
MCAS BL TORO
OU2A.24.2S SOUTHWEST DIVISION
MCAS BL TORO
OU2A.24.25 SOUTHWEST DIVISION
MCAS BL TORO
OU2A.24.25 SOUTHWEST DIVISION
MCAS EL TORO
1,2,3,4,5 SOUTHWEST DIVISION
6,7,8,9,10 MCAS BL TORO
11,12,13
14,15,16
17,19,20
31,22,24
Thlt Administrative Record (AR) Index Includes reference* to documents which cite bibliographical source*.
Thw bibliographic citations art consktond to be part of this AR but may not be cited separately in the Index
-------
DATS - 09/19/97
PACE • 1C
TECHNICAL DOCUKENTS-OU2A, SITE 24, SOIL CLEANUP, HCAS EL TORO
DOCUMENT. TYPE...
CONTR/GUID. .NO. .
AFPROX.f .OP.PAGES
DOC. DATE
CTO.HO. .
EPA. CAT!
FRCM SIGNATUHB
TO
TO.SICUA1UMK
CLASSIFICATION
KEY NORDS
M60050 001276 continued
MoOOSO 001397
HISC
N6I71192D4670
0019
M600SO 001199
MISC
N6671192D4670
0003
M60050 001391
NISC
N6I71192D4670
0003
M600SO 001413
RPT
N6t71192D4670
0300
H6U050 001414
RPT
N6671192D4670
UJOO
M600SO 00141S
RPT
N6S71192D4670
0300
M60050 001416
RPT
N687119204670
0300
M600SO 001401
MISC
H6D7UMD4670
02SO
03/20/»i,
02/06/9*
00079
05.4
03/20/9*
02/14/9*
00079
05.4
03/20/9*
02/20/9*
00079
05.4
03/31/96
02/20/9*
0007J
03.4
03/2S/96
02/20/9C
00073
03.4
03/25/96
02/20/96
00073
03.4
03/2S/96
02/2U/V6
00073
03.4
03/20/96
02/28/96
00079
OS. 4
BECHTEL NATIONAL INC
D. COMSfcX
SOUTHWEST DIVISION
P. KENNEDY
BBCHTKL NATIONAL INC
D. CONSER
SOVniHEST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
D. CONSER
SOUTHWEST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
••. BROOKS
.•.UUTKWBST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
P. BROOKS
SOl/l.irffcST DIVISION
P. KKNNKDY
BECHTEL NATIONAL INC
P. BKUOKS
SOUTHWEST DIVISION
P. KUiMEDY
BECHTEL NATIONAL INC
P. BROOKS
SOUYIIHEST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
D. COMSER
SOUTIlHtST DIVISION
?. KENNEDY
MEETINO MINTUES FOR THK 30 JANUARY 1996 MEEKLY BASE
CLEANUP TEAM BRIEFING HELD TO DISCUSS OU3, THE BCP,
OU2A. AND THE LAtiUPILL SITES AND MEETINO MATERIALS
MEETINO MINTUES 07 FEBRUARY 1996 WEEKLY BCT BRIEFING
HELD TO DISCUSS OU3. THE BCP, LANDFILL SITUS, OU2A,
OU2B
iVLTINO NINTUBS 14 FEBRUARY 1996 MEEKLY BCT BRIBFINO
HELD TO DISCUSS 002 A, OU2B, THE RCRA FACILITY
ASSESSMENT, AND THE BCP
DRAFT PHASE II REMEDIAL INVESTIGATION REPORT OPERABLE
UNIT (OU) 2A SITE 24 VOLUME I
SIGNED FEBRUARY 20, 1996
DRAFT PHASE II REMEDIAL INVESTIGATION REPORT OU 2A -
SITE 24 VOLUMh II APPENDICES A - I
SluNUO FEBRUARY 20, 1996
DRAFT PHASE II REMEDIAL INVESTIGATION REPORT OU 2A -
SITE 24 VOLUME III APPENDIX J
SIGNED 'FEBRUARY 20, 1996
DRAFT PHASE II REMEDIAL INVESTIGATION REPORT OU 2A -
SITE 24 VOLUME IV APPENDICES K - P
SIGNED FEBRUARY 30, 1996
BASE REALIGNMENT AND CLOSRURB PLAN (BCP) DATED MARCH
1, 1996
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
i tuftbUfe j»U& ktKllAMM_l
BCP
MTO MIN8
TECH/GUID DOC.
MTO MI MS
BCP
NPA
TECH/QUID DOC.
BCP
MTO MINS
RFA
BCP
TECH/QUID DOC.
RI
OU
TECH/GUID DOC.
RI
OU
TECH/GUID DOC.
RI
OU
TECH/GUI D DOC.
RI
OU
TECH/GUID DOC.
BCP
TECH/QUID DOC.
NFA
...Sit*...
2S.OU2.0U3
OU2A.OU3
1,4,6,7,1
9,10.11,12
13,14,1$
16,19.20
21,22,24
25
OU3.0U2A.
OU2B,1,2,4
7.1,9,10
11.12,13,
14,15,16
17.19,20
21,22,24
25
OU2A.OU2B
1.2. 4. 6,7
1.9,10,11
12,13,14
IS. 16. 17
19,20.21,
23,34,35
OU2A.24
OU2A.34
OU2A.24
OU2A.24
OU1.OU2.
003,1,2.3,
4..S. 6,7.1
9,10,11,
13,13,14
IS. 16. 17
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Th*M WWiogiapWc citation* are coiuktend to b« part of Uu> AR M may not to dteg Mpwtely to ltu» Index.
-------
DATS - 09/19/97
PAGE
TECHNICAL DOCUHEMTS-OU2A, 8ITB 34, SOIL CLEANUP. MCAS EL TORO
UIC No. DOC. HO.
DOCUMENT. TYPE. . .
CDNTR/CUIO. .NO. .
APPROX.tf. OF. CAGES
PfiC.DATB
DOC. DATE
CTO.NO..
EPA.CATI
FROM
FROM. SIGNATURE
TO
TO. SIGNATURE
SUbJBCT
CLASSIFICATION
KSY WORDS
M60050 001401 continued
M60050 001400
MISC
N6871192D4670
0023
M60050 001396
MISC
N6B71192D4670
0009
M60050 0013B2
MISC
N(8711>204t70
0020
H600SO 001393
RPT
H6<7119204f70
01SO
M60050 001118
MISC
NC871192D4670
0003
M60050 001412
MISC
N6B71192D4670
0003
03/20/96
02/29/95
00079
OS. 4
03/20/96
03/OS/96
00079
05.4
03/20/96
01/12/96
00079
OS. 4
03/20/96
03/14/96
00073
03.4
04/03/96
03/16/96
00079
03.1
03/2S/96
03/21/96
00079
OS. 4
BECHTBL NATIONAL INC
D. COHSER
SOU). .WEST DIVISION
P. KENNEDY
BECHTBL NATIONAL INC
D. COWSER
JWUTHWBST DlVISlvii
P. KENNEDY
BECHTBL NATIONAL INC
D. COWSER
SOUTHWEST DIVISION
P. KENNEDY
BECHTBL NATIONAL INC
D. CONSER
SOUTHWEST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
D. COWStH
SOUTHWEST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
D. COWSER
UOUTlMi. T DIVIbluti
P. KKNNbOf
MEBTIHO MINTUES 21 PEBRIIANY 1996 MEEKLY BCT BRIEFING
HELD TO DISCUSS OU2A, OU2B, AND OU3 FIELDHORK,
INCLUDES MUTING MATERIALS
MEBTIHO MINUTES FOR THE 21 FBBRUARUY 1996 BASE CLEANUP
TEAM KEETINO HELD TO DISCUSS OU3. THE BCP. OU2A, AND
THE LANDFILL SITES
MEETING MINUTC3 FOR 6 MARCH 1996 BASE CLEANUP TEAM
MEBTIHO HELD 1o DISCUSS SITES 24,25, LANDFILL BITES,
AND OU3 FIELD WORK, MEETINO MATERIALS
REPORT ENTITLED DRAFT .OROUNDHATBR EXTRACTION AND
INJECTION NELL AQUIFER TESTS FOR FINAL PHASE II Rl/fS
WORK PLAN
MEETING MINUTUS FOR 13 MARCH 1996 BRAC CLEANUP TEAM
MEETING HLLD TO DISCUSS OU2A, OU2B, AND OU3
MEETING MINUTES FOR 20 MARCH 1996 WEEKLY BRAC CLEANUP
TEAM MEETING HtiD TO DISCUSS OU2A.OU2B, OU3, AND
EMPLOYEE INTERVIEWS
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
NTS HINS
BCP
BCT
TECH/OUID DOC.
NFA
MTG MINS
BCP
TECH/GUI D DOC.
NFA
MTO MINS
CLEANUP
TECH/GUID DOC.
NFA
aw
RI
FS
TECH/GUID DOC.
MTO MINS
BCT
TECH/OUID DOC.
NFA
MTO MINS
BCT
TECH/GUID DOC.
NFA
. ..Sit«...
18,19,20
21,22,24
25
OU2A.OU2B
OU3.1.2.4
6,7,8,9,10
.11,12.13
14,15,16
17,19,20
21.22.24
25
OU1.0U2A
1.4,6.7,8
9,10,11,12
13,14,15
16,19,20
21,22,24
25
003,24,35
OU3.OU3.1
2,3,4,5.6,
7,8.9,10
11,12,13
14,15,16
17.19,20
21,22,24
25
OU2A.OU2B
OU3.1.2.4
6,7.8.9.10
11,12.13
14,15.16
17,19,20
21,22,24
25
OU2A.OU2B
003,1,2,4,
6,7,8,9,10
11,12,13.
14, IS. It.
17,19,20
21,22,24,
25
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
This Administrative Record (AR) Index Includes references to documents which die bibliographical sources.
Thei* bibliographic citations are coroktartd to be part of UtoAR but may not be cited separately in tne index.
-------
DATE - 09/19/97
PACE - It
TECHNICAL DOCUMENTS-OU2A, SITS 34, SOIL CLEANUP, MCAS BL TORO
UIC No. DOC. HO.
DOCUMENT . TYPE . .
CONTR/GUID NO
APPROX . 1 . OF . PAGES
MoOuiO 001420
HIT
N6S71192D4670
OU-..:.
M600SO 001131
HISC
No«71192D4670
0007
M600SO 001749
MISC
OOUQOOOOOOOOOOO
0004
M600SO 0003J1,
MISC
N68711920467000
0004
M60050 001017
MM
N6871192D467000
0004
N600SO 001613
LTR
N6B71192D4670
000«
H600SO 000365
MM
N6871192D467000
0005
M60050 001491
RPT
N(.BV11!I2D4CVOOO
0050
PRC.DATB
DOC DATE
CTO NO
EPA CATI
04/03/96
03/25/96
00073
03.3
03/18/96
04/01/96
00079
03.6
03/11/97
04/01/96
00000
10.6
06/19/96
04/03/96
00073
10.1
06/19/96
04/OS/96
00079
00.0
09/04/96
04/1S/96
00080
01.6
06/19/96
04/17/96
00079
00.0
OS/22/V6
04/17/96
00073
02.0
FROM
PROM. SIGNATURE
TO
TO. SIGNATURE
BECintl. NATIONAL INC
D. COHSER
SOUTHWEST DIVISION
P. KENNEDY
BECHTBL NATIONAL INC
D. COHSER
SOUTHWEST DIVISION
P. KENNEDY
EPA
PUBLIC INTEREST
BECHTEL NATIONAL INC
0. COHSER
SOUTHWEST DIVISION
P. KbtxUiDY
BECHTEI. NATIONAL INC
D. COMER
SOUTHWEST DIVISION
P. KOWECY
BNI SAN DIEOO
D. TEDALDI
SOUTHWEST DIVISION
J. JOYCE
BEC1ITEI ..ATIONAL INC
D. COHiLK
SOUTHWEST DIVISION
P. KENNEDY
BECHTEb NATIONAL INC
D. COHSER
SOUTHWEST DIVISION
P. KENNEDY
....SUBJECT
DRAFT FINAL Wufci: PLAN FOR MR SPAROINO PILOT TEST
MEETING MINUTES FOR 27 MARCH 1996 WEEKLY BASE CLEANUP
TEAM MEETING HELD TO DISCUSS SITES 24 AND 25, THE
LANDFILL SITES, AND OU3 (SITE IS) FIBLDWORK
FACT SHEET *A CITIZEN'S GUIDE TO SOIL VAPOR EXTRACTION
AND AIR SPARGING*
BECHTEL' S RESPONSE TO COMMENTS RECEIVED FROM DTSC AND
US EPA ON DRAFT FINAL WORK PLAN FOR AIR SPARGING
PILOT TESTING
MINUTES FROM 1 APRIL 199« BRAC CLEANUP TEAM MIBTINO
HELD TO DISCUSS OUJA, OU2B AND OU3
REVIEW COMMENTS ON DRAFT FINAL WORK PLAN FOR AIR
SlAKOINO AND DRAFT RI REPORT, OU 2A SITE 24
MINUTES FROM 10 APRIL 1996 WEEKLY BRAC CLEANUP TEAM
MEETING HtLD TO DISCUSS OU2A, OU2B, OU3, AND RCRA
FACILITY ASSESSMENT ADDENDUM
DRAFT WORK PLAN FOR SOIL VAPOR EXTRACTION PILOT
TESTING AT SITE 24
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
ADMIN RECORD
INfO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INkO REPOSITORY
ADMIN RECORD
INTO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
AIR
VOC
TECH/GUI D DOC.
BCT
MTO MINS
OU
TECH/GUI D DOC.
NFA
SOIL
AIR
TECH/OUID DOC.
COMMENTS
AIR SPARGE
PILOT TEST
TECH/OUID DOC.
MTO MINS
BCT
TECH/QUID DOC.
NFA
COMMENTS
WORK PLAN
RI
TBCH/GUID DOC.
MTO MINS
DCT
RFA
TECII/GU1U IMC,
NFA
SV
PILOT TEST
TBCH/GUID DOC.
. . .Sice. . .
24
OU2A.OU2B,
OU3,1,2,3,
4.5,6,7,8,
9.10,11.12
11,14,15
16,17,19
20,21.22
24,25
OU2A.OU2B
003,1.2,
10,11,12
13,14,15
16,17,19
20,21,22
24,25
OU2A
24
OU2A.OU2U
OU3.1.2.3,
4,6,7,1,9
10,11,12
13.14.1S
16,17,19
20,21.22,
24.25
24
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUT1IWKST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TOKO
This Administrative Record (AR) Index Includes references to documents which cite bibliographical sources.
The** bibtngraohic citations «• eonakfenxl to be pan of into AR but rr»y not b* cited •epaiatejy to the Index,
-------
DATE • 09/19/97
PAGE - 19
TECHNICAL DOCUMENTS-OU2A, 8ITB 34. SOIL CLEANUP. NCAS EL TORO
UIC No. DOC. NO.
DOCUMENT. TYPE. . .
CONTR/GUID NO
APPROX . 1 . OF . PAGES
M60050 001962
HISC
000000000000000
0075
M60050 000159
MM
N6871192D467000
001S
M60050 001932
LTR
OOOOOOOOOUuuuOO
0012
M60050 000186
KM
N6871192D467000
0022
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KM
N6871192D4670
uoos
M60050 001506
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N6871192D4670
0011
M600SO 001510
MM
N6B711920467000
000}
PRC DATE
DOC.liAl'B
CTO NO
EPA.CATI
09/18/97
04/24/96
00000
10.4
06/19/96
04/29/96
00079
00.0
04/29/97
U>>/01/«u
00000
10.1
06/19/96
05/02/91
00079
00.0
06/06/94
'.-./2I/96
0007)
01.1
06/06/96
OS/11/96
00079
01.1
06/14/96
06/06/96
00079
01.1
FROM
FROM. SIGNATURE
TO
TO. SIGNATURE
MCAS BL TORO
RAB MEMBERS
BECHTEL NATIONAL INC
D. COMSBR
SOUTHWEST DIVISION
P. KENNEDY
SOUTHWEST DIVISION
L. NUZUM
DTSC LUK1 BEACH
T. MAHMOUD
BECHTEL NATIONAL INC
D. COWSER
SOUTHWEST DIVISION
P.. KENNEDY
BECHTEL NATIONAL INC
D. COWSER
SOUTHWEST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
D. COWStH
SOUTHWEST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
D. COWSER
SOUTHWEST DIVISION
P. KENNEDY
..SUBJECT
PUBLIC INFORMATION MATERIALS FOR APRIL 24. 1996,
MEETING-AGENDA, HANUOOrU, fc MINUTES OF FEBRUARY 21.
1996. SIGN IN SHEETS OF 4/24/96 RAB MTO.
MINUTES FROM 17 MARCH 1996 WEEKLY BRAC CLEANUP TEAM
MEETING HELD TO DISCUSS OU2A, OU2B, AND OUJ
REQUEST THAT DTSC AS LEAD AGENCY FOR STATE OF
CALFIORNIA ARARa FOR OPERABLE UNIT (OU) 24
MINUTES FROM 24 APRIL 1996 BRAC CLEANUP TEAM MEETING
HELD TO DISCUSS OU2A. OU2B. OU), AND MCL8 FOR
TWICHLOROSTHYLENB
MINUTES FROM WEEKLY BRAC CLEANUP TEAM MEETING HELD ON
IS MAY 1996 TO DISCUSS OU1, OUJ A, OU2B, AND OU)
MINUTES FROM WEEKLY BRAC CLEANUP TEAM MEETING HELD 22
MAY 1996 TO DISCUSS OU1. OU2A, OU2B, AND OU)
MEETING MINUTES FROM 29 MAY 1996 BRAC CLEANUP TEAM
MEETING HELD TO DISCUSS OU 1. OU2A, OU2B, AND OU)
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
PUB. PARTICIPATI
PUBNOT
RI
OW
TECH/GUID DOC.
MTG MINS
BCT
OU
TECH/QUID DOC.
NFA
REQUEST
TECH/GUID DOC.
MTO MINS
BCT
TCB
TECH/QUID DOC.
NPA
ON
BCT
MTO MINS
TECH/GUID DOC.
NFA
OU
MTG MINS
BCT
TECH/GUID DOC.
NFA
MTG MINS
BCT
TECH/GUID DOC.
NFA
. . .Sit*. . .
TANK 398
OU 2A
24
25
OU2A.OU2B
OU).1.2.
4, 6, 7. 9.9
10,11.12,
D.14,15
1C. 11, 19
20,21.22
34,2*
24
OU 2
25
OU2A.OU2B
OU).1.2,
4,6,7,1,9
10,11,12
13.14,15
16.17.19
20,21,22.
24.25
OU1.0U2A
OU3.1.2.
4,6,7,8,9
10.11,12,
13.14.15
16.18,19
20.21.22
24,25
OU1.0U2A
OU2B.OU)
1,2.3,4,5
6.7.8,9.10
11,12,13
14,15,16
17,18,19,
20,21,22
24,25
OU1.0U2A.
OU2B,OU3,1
2,4,6,7,8,
9,10,11,12
11.14. IS,
SOUTHWEST DIVISIOI
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOVDMEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
This Administrative Record (AR) Index Includes references to documents which cite bibliographical sources.
Thee* bibliographic citation* are considered to be pan of Hue AR bid may not be cited separately In the Index.
-------
DATE - 09/19/97
TECHNICAL DOCUMENT;, OU2A, 8IT1 34, SOIL CLEANUP. HCAS EL TORO
PAOB - 3A
UIC No. DOC. NO. PRC.DATB
DOCUMENT. TYPE. . . DOC. DATE
CONTR/GUID..NO. . CTO.NO. .
APPROX. LOP. PAGES EPA.CAII
HouUbO 001510
HbU3SO 001635
RPT
N6871192D4670
1000
H600SO 001616
RPT
N6871192D4670
1000
M60050 C01S16
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N687192D4670000
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MM
N6I7192D4670000
0009
M600SO 001646
XHTL
N6B71192D4670
0022
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OOOJ
continued
09/24/96
06/12/96
0007)
01.4
09/24/9C
06/12/91
0007)
03.4
07/03/96
06/14/96
00079
01.1
07/03/96
04/20/9*
00079
01.1
09/27/96
07/01/96
00079
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09/04/96
. 07/22/96
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09/04/96
07/22/96
00000
01.6
PROM
FROM. SIGNATURE
TO
TO. SIGNATURE
BNI SAN DIEGO
G. P. BROOKS
SOUTHWEST DIVISION
BNI SAN DIEOO
O. P. BROOKS
sovnwesT DIVISION
.,,,,,,,.,........, .SUBJECT. . . ...... i . . . ........ CLASSIFICATION KEY "ORE'S
DRAFT FINAL PHASE II RI REPORT OUJA-SITB 24 ADMIN RECORD RI
VOLUME III APPENDICES J INFO REPOSITORY FS
TECH/GUID DOC.
DRAFT FINAL PHASE II RI REPORT OU2A-8ITE 24 ADMIN RECORD RI
VOLUME IV APPENDICES K-P INFO REPOSITORY PS
TECH/QUID DOC.
BBCHTBL NATIONAL INC MEETING MINUTES FROM S JUNE 1996 BRAC CLEANUP TEAM ADMIN RECORD BCT
D. COHSER (BCT) MEETING HELD TO DISCUSS OU 1. 2A. 2B. 2C. 1 AND MTO MINS
SOUTHWEST DIVISION THE SITS 25 RI/PS RZ
P. KENNEDY FS
TBCH/OUID DOC.
BECHTEL NATIONAL INC MfiBTXM MINUTES FROM 13 JUKI 199* BRAC CLEANUP TEAM ADMIN RECORD BCT
0. CONSER (BCT) MEETINO HELD TO DISCUS* OU 1, 3A, 21, AND OU ) INFO MFOSITORV MTO MIHS
SOUTHWEST DIVISION TECH/GUI D DOC.
P. KUil.i.DY * NFA
BNI SAN DIEOO
D.K. COHSER
SOUTHWEST DIVISION
P. KEIUtLUY
EPA SAN FRANCISCO
B. ARTHUR
MCAS EL TORO
J. JOYCE
DTSC LONG BEACH
J. SCANDURA
MCAS EL TORO
J. JOYCE
JUNE 19, 1996 BCT MEETINO MINUTES ADMIN RECORD MTO MINS
H/ENCL INFO REPOSITORY TBCH/GUID DOC.
NFA
COMMENTS ON THE DRAFT FINAL PHASE II RI REPORT OU 2A- AlJr.JN RECORD COMMENTS
SITE 24 AND COMMENTS ON THE DRAFT FINAL OU 2A FS INFO REPOSITORY RI
REPORTS FS
TKCH/OU1D DOC.
APPROVAL OF THE DRAFT FINAL PHASE II RI REPORT ADMIN RECORD RI
SITE 24, OU 2A INFO REPOSITORY VOC
TECH/GUID DOC.
. ..Slt«...
16,17,18
19,20,21
22.34,25
OU2A
OU2
24
OU1.OU2A,
OU2B.OU2C
003,1,2.3,
.4,6,4,7,1
», 10,11, 13
1),14,15
IC.lT.lt
19,30,21
32,34,25
OU1.0U2A
OU2i. 001,1
3, 4, C.T.I,
9, 10.11, 13
13,14,15,
16,17,11
19,30,21
33.34.3S
C
8
IS
3
5
OU1
OU2A
25
OU2A
24
24
OU2A
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
This Administrative- Record (AR) Index Include* reference* to document* which cite bibliographical *ource».
TM* bibliographic citations are conskkuKJ to b* part of Into AR but may not b« ctted *eparat*ly In ttw kMtex.
-------
DATE - 09/19/97
PAGE - 21
TECHNICAL DOCUMENTS-OU3 A, SITE 24, SOIL CLEANUP, NCAS EL TORO
UIC No. DOC. NO.
DOCUMENT. TYPE. . .
OONTR/GUID. .NO. .
APPROX . » . OF . PAGES
M60050 001650
XKTL
N6S71192D4670
0044
M60050 001651
XMTL
N6871192D4670
0009
H600!,U 001652
XMTL
N6871192D4670
0003
M60050 001651
XMTL
N6871192D4670
0003
H60050 001654
XMTL
N68711SI2D4670
0018
M60050 001582
RPT
N6B7U89D9296
0045
PRC.DATE
DOC. DATE
Clu.NO. .
El'A.iTATI
09/27/96
07/10/96
00079
10.6
09/27/96
07/10/96
00079
10.6
09/27/96
07/10/96
00079
10.6
09/27/96
08/07/96
00080
10.6
09/27/96
08/07/96
00079
10.6
OB/33/96
08/09/96
00145
01.4
FROM
FHOM. SIGNATURE.
TO SUBJECT
TO.SIGNATUHU
BN1 SAN DIEGO JULY 10, 1996 BCT MEETING MINUTES
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S.UUTHHBST DIVISION
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SOUTIIHtST DIVISION
R. SELBY
BNI SAN DIEGO JULY 16, 1996 BCT MEETING MINUTES
O.K. COMSER H/ENCL
SOUTHWEST DIVISION
R. SELBY
JACOBS/CH2M HILL, INC DRAFT FINAL 001 INTERIM RI/FS REPORT EXECUTIVE
SUMMARY VOLUME I OP IX
SOUTHWEST DIVISION
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RSOORO
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
MTO MINS
TBCH/GUID DOC.
NFA
MTO MINS
TECH/GUID DOC.
NFA
MTO MINS
TSCH/GUID DOC.
UFA
MTO MINS
TBCH/GUID DOC.
NFA
MTG MINS
TECH/GUID DOC.
NFA
RI
•ps
TECH/GUID DOC.
. . .Site. .
OU1
24
OU2A
OU2B
003
OU2C
18
25
2
17
1
S
OU1
24
2
17
001
OU3A
OU1B
OU2B
OU2C
OU1
OU2A
24
25
i
17
001
OU2B
OU2C
003
24
003
25
OU1B
OU2A
2
17
OU1
OU1
16
SOUTHWEST DIVISION
NCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
This Administrative Record (AR) Indt* Include* reference* to document* which ule biltographlcal touicet.
Th»»*4i DiUltoflraphic c&aOon* ut consWamd to b* part of tttte AR but may not bcciUdupOTtely In uw Index.
-------
DATB - 09/11/97
PAOB • u
TECHNICAL DOCUMENTS-OU2A, SIT! 24, SOIL CLEANUP. MCAS IL TORO
UIC No. DOT. NO.
DOCUMENT. TYPE. . .
CONTR/GUID NO
APPROX . 1 . OP . PACES
M60050 OulbUJ
RPT
N6871189D9296
3500
M60050 001584
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N6871189D9296
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N6871189D9296
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N6871189D9396
0275
M600SO 001590
RPT
N6871189D9296
1500
H60050 00164S
RPT
N6871192D4670
2000
M60050 001655
XMTL
N6871192D4670
0001
PRO. DATS
DOC. DATE
CTO NO
EPA CATI
08/22/96
08/09/96
0014S
01.4
08/22/96
08/09/96
0014S
03.4
08/22/96
01/09/96
0014S
OJ.4
08/22/96
08/09/96
00145
03.4
08/22/96
08/09/Hk
0014S
03.4
08/22/96
08/09/96
00145
03.4
08/22/96
08/09/96
00145
03.4
08/22/96
08/09/96
00145
03.4
09/27/96
08/09/96
00073
04.2
09/27/96
08/14/96
00079
10.6
PROM
FROM. SIGNATURE
TO .
TO. SIGNATURE
JACOBS/CH2M HILL. INC
SOUTHWt^r DIVISION
JACOBS/CH2M HILL. INC
SOUTHWEST DIVISION
JACOBS/OUM HILL. INC
SOUTHWEST DIVISION
JACOBS/CHIN HILL INC
SOUTHWEST DIVISION
JACOBS/CH2H HILL INC
SOUTHWEST DIVISION
JACOBS/OUM HILL INC
SOUTHWEST DIVISION
JACOBS/CH2M HILL INC
SOUTHMEST DIVISION
JACOUS/CH2M HILL INC
SOUTHWkST DIVISION
BNI SAN DIEGO
O.BKiAjKS
SOUTHWEST DIVISION
BNI SAN DIEGO
O.K. COMSER
SOUTHWEST DIVISION
R. SELBY
"
SUBJECT
DRAFT FINAL IHlUUM OU1 RI REPORT VOLUME II OF IX
DRAFT FINAL OU1 HUNAN HEALTH RISK ASSESSMENT REPORT
VOLUM8 III OF IX
DRAFT FINAL OU1 INTERIM-ACTION FEASIBILITY STUDY
REPORT VOLUME IV OF IX
DRAFT FINAL INTERIM OU1 RI REPORT APPENDICES
VOLUME V OF IX
DRAFT FINAL 001 INTERIM-ACTION FEASIBILITY STUDY
REPORT VOLUME VI OF IX
DRAFT FINAL 001 INTERIM-ACTION FEASIBILITY STUDY
REPORT VOLUME VII OF IX (APPENDICES B THROUGH J)
DRAFT FINAL INTERIM OU1 REMEDIAL INVESTIGATION REPORT
ADDENDUM VOLUME VIII OF IX
DRAFT- FINAL INTERIM OU1 INTERIM-ACTION FS REPORT
ADDENDUM VOLUME IX OF IX
DRAFT HIASB II FEASIBILITY STUDY REPORT
OU2A-SITE <1 (DISCREPENCY IN TEXT EDIT TOC TABLES 3-3
THRU 3-7 TO BE IN PLACE IN FINAL PHASE II FS REPORT)
AUGUST 7, 1*96 BCT MEETING MINUTES
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
RI
PS
TECH/QUID DOC.
RISK
RI
FS
TECH/GUID DOC.
FS
RI
TBCH/OUID DOC.
RI
FS
TECH/QUID DOC.
RI
FS
TECH/QUID DOC.
RI
FS
ARAR
TBCH/OUID DOC.
RI
FS
GH
TECH/QUID DOC.
RI
FS
GH
TECH/GUID DOC.
FS
COST
TECH/GUID DOC.
MTG MINS
TECH/GUID DOC.
NFA
. . .Sit*. . .
OUl
OU2
003
OU1
OU1
IB
OU1
OUl
out
OUl
OU1
OU2A
OUl
24
OUl
OU2
24
OU2B
OU2C
OU3
2S
OU3B
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHMEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Thii Administrative Record (AR) lnd«x InchKtet reference to document! which cite blbttogmphlcal »ourcei.
TMM MbUcwhIccitatkira M «wi4d«^
-------
! DATE - 09/19/97
1
! UIC No. DOC. NO.
• DOCUMENT. TYPE. . .
] CONTR/GUID. .I.u. .
PRC.DATB
DOC. DATE
CTO.HO. .
• APFHOX.*. OP. PAGES EPA.CATI
M60050
XMTL
0016S8
N6871192D4670
0005
M600SO
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001612
N687189D9296
0002
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XMTL
001672
N6871192D4670
0004
H60050
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001931
000000000000000
0001
M60050
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N6871192D4670
0001
MfiOOSO
MISC
001983
000000000000000
0050
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LTR
001910
000000000000000
0003
M600SO
RPT
001C92
N6871193DH59
03SO
09/27/96
08/27/96
00079
10.6
09/16/96
09/04/96
0014S
01.6
09/30/96
09/11/96
00079
10. S
04/29/97
09/16/96
00000
10.1
09/10/96
09/19/9*
00079
10. S
09/18/97
09/25/96
00000
10.4
04/29/97
10/08/96
00000
10.1
11/11/96
10/11/96
DOI75
01.1
TECHNICAL DOCUMBNTS-OU3A, SITE 34, SOIL CLEANUP, MCAS KL TORO
t MOM
FKOM. SIGNATURE
TO
TO . SIGNATURE
BNI SAN DIEOO
O.K. IXM4SER
SOUTHWEST DIVISION
R. SBLBY
MCAS 6L TOKO
J. OOLEGGrfSKI
SOUTHWEST DIVISION
K. KENNEDY
BNI SAN DIEOO
D. COHSER
SOUTHWEST DIVISION
R. SELBY
CITY OP IRVINE
I-. HBRSH
MCAS EL TORO
J. JOYCE
BNI SAN DIEGO
D. COUSER
SOUTHWEST DIVISION
R. SELBY
MCAS EL TORO
RAB MEMBERS
BL ASSOCIATES
M. RUDOLPH
SOUTHWEST DIVISION
J. JOYCE
OHM REMEDIATION
W. SEDLAK
SOUTHWEST DIVISION
SUBJECT. . . . i
AUGUST 21. 1996 BCT MEETING MINUTES
W/ENCL
REVISED TABLES ES-6 RI/FS AND BS-1 FOR OU1 PROM PS
SEPTEMBER 4. 1996 BCT MEETING MINUTES
*
COMMENTS REGARDING EVALUATION OP OU1 LA/8 ADDENDUM AND
OU 2A REMEDIATION ALTERNATIVES
SEPTEMBER IT, 1996 BCT MEETING MINUTES
PUBLIC INFORMATION MATERIALS FOR SEPTEMBER 25, 1996,
MEETING-AGENDA, HANDOUTS, 4 MINUTES OP JULY 11, 1996
RAB MTO., SIGN- IN SHEETS, REV. 'BLUB SHEET*
COMMENTS ON DRAFT PHASE II FEASIBILITY STUDY FOR
OPERABLE UNIT 2A-SITE 24 FROM THE ORANGE Co. .M i
HATER DISTRICT AND OU2 SUBCOMMITTEE CO-CHAIR H/ENCLS
TECHNICAL MEMORANDUM CONTINUATION OF CLEAN II SITE 24
SOIL VAPOR EXTRACTION PILOT TEST
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
MTO MINS
TECH/GUID DOC.
NFA
ES
RX
PS
TECH/GUID DOC.
KTO MINS
REMOVAL
TECH/GUID DOC.
COMMENTS
OU
ADPM
TSCH/OUID DOC.
KTO MINS
ARAR
TECH/QUID DOC.
NFA
PUB. PARTICIPATI
PUBNOT
MTO MINS
TECH/GUID DOC.
COMMENTS
OU
PS
TECH/QUID DOC.
TECH MEMO
SOIL
SVEI
HfcSP
TECH/GUID DOC.
.. .Site. . .
OU1
24
17
2
3
5
OU3A
OU3B
OU1
9
18
25
19
OU2A
OU1
OU 2A
OU1
OU2B
OU2C
BLDG. 368
TANK 191
OU 1
OU 2A
18
24
25
OU 2A
24
24
PAGE •
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Thi* Administrate* Record (AR) Index Include* reference* to document* which cite bibliographical tource*.
Trio*«biblworapMccitttt>n*ar*<^ld4»^tobepartc
-------
DATE - 09/19/91
TECHNICAL DOCUMEHTS-OU2A. SITE 24, COIL CLEANUP, MCAS 8L TORO
PAGE • 24
UIC No. DOC NO
DOCUMENT. TYPE. . .
GONTR/GUID HO
APPRO*. (.OF PACES
M60050 001928
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000000000000000
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MG0050 001929
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M600SO 001706
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M60050 001707
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N6871192D4670
0004
M60050 001927
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M60050 001701
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N6871192D4670
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N6871192D4670
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LTR
000000000000000
0001
M600SO 001769
LTR
000000000000000
0003
M60050 001770
LTR
OOOUOOOOOOOOOOO
0003
PRC DATS
DOC. DATS
CTO NO
EPA.CATI
04/29/97
10/11/96
00000
10.1
04/29/97
10/11/96
00000
10.1
11/13/96
10/15/96
00079
10.4
11/11/96
10/15/96
00079
10.4
04/29/97
10/15/96
00000
10.1
11/12/96
10/21/96
0007C
03.4
11/J1/96
11/12/96
00073
04.2
03/20/97
12/04/96
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12/06/96
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12/06/96
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01.6
FROM '
FRQH. SIGNATURE
TO
TO. SIGNATURE
EPA SAN FRANCISCO
B. ARTHUR
MCAS . EL TORO
J. JOYCE
DTSC LONG BEACH
T. MAKMOUND
MCAS EL TORO
J. JOYCE
UNI SAN DIEGO
D. COMER
SOUTHWEST DIVISION
R. SBLBY
BNI SAN DIEGO
D. COHSER
SOUTHWEST DIVISION
R. SBLBY
EPA SAN FRANCISCO
B. ARTHUR
MCAS EL TORO
J. JOYCB
Dill SAM DIEGO
D. GOWSBR
SOUTHWEST DIVISION
R. SBLBY
BECHTBL NATIONAL
D. COHSER
SOUTHWEST DIVISION
R. SELUY
EPA SAN FRANCISCO
0. KISTNER
MCAS EL TORO
J. JOYCB
DTSC LONG BEACH
T. MAIIMOUD
MCAS LL TOKO
J. JOYCB
DTSC LONG BEACH
T. MAIIMOUD
MCAS EL TORO
J. JOYCB
. ... SUBJECT
REVIEWED AND COMMENTS BY AGENCY TUB DRAFT PHASE XI
FEASIBILITY STUFY OPERABLE UNIT 2A REPORT H/ENCLS
COMMENTS ON DRAFT PHASE II FEASIBILITY STUDY FOR SITE
24 00 JA H/ENCLS
SEPTEMBER 25, 1996 BCT MEETING MINUTES
OCTOBER 9. 1996 BCT MEETING MINUTES
.COMMENTS ON THE DRAFT PHASE II FEASIBILITY STUDY
OPERABLE UNIT 2A REPORT ON OCTOBER 11, 1996
SOIL VAPOR EXTRACTION PILOT TEST REPORT - SITE 24
AIR-SPARGING PILOT TEST REPORT SITE 24
EL TORO EXTENSION REQUEST FOR OU 1 AND OU 2A
COMMENTS ON AIR-SPARGING PILOT TEST, SITE 24, OU 2A
COMMENTS ON AIR-SPARGING PILOT TEST, SITE 24, OU 2A
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
COMMENTS
PS
OU
TECH/GUID DOC.
COMMENTS
. fs
TECH/GUID DOC.
MTO MINS
TECH/GUID DOC.
NFA
MTO MINS
TECH/QUID DOC.
NFA
COMMENTS
PS
OU
TBCH/OUID DOC.
SOIL
8VBI
LAB
TBCH/OUID DOC.
AIR
TECH/GUID DOC.
OU
REQUEST
TECH/QUID DOC.
COMMENTS
AIR
OU
TECH/GUID DOC.
COMMENTS
AIR
OU
TECH/QUID DOC.
. . .Sit*. . .
OU 2A
OU 1
24
OU 2A
24
a
17
19
UNIT 3
2
17
1
s
OU 2A
35
34
34
OU 1
OU 2A
11
24
2
24
OU 2A
24
OU 2A
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISIOH
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISIOH
MCAS EL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
This Adminlitulive FWcord (AR) Index Includi* reference! to document* which cite bibliographical sources.
These bibliographic ctaUon* -re coraMered to be part of this AR but may not be died eeparalely K» the Index
-------
DATE - 09/19/97
PAGE - as
TECHNICAL DOCUMENTS-OU2A. SITS 24, SOIL CLEANUP, HCAS BL TORO
! DOCUMENT. TYPE. . .
i CONTR/CUID. .NO. .
; AI-PKOX.I. OF. PAGES
M60050 001765
LTD
000000000000000
0002
H60050 001753
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N6871192D4670
0003
HC0050 001752
XMTL
N6871192D4670
0004
H600SO 001620
LTR
000000000000000
0006
M60050 0017S4
XMTL
N6871192D4670
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M60050 00174S
PLAN
N687119204670
2000
DOC. DATS
CTO.NO. .
EPA.CATI
01/20/97
12/12/96
UUUUO
10.1
03/19/97
01/13/97
00124
10.4
01/19/97
01/15/97
0007*
10.4
03/21/97
01/21/97
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03/20/97
01/24/97
00103
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0010)
04.2
FROM. SIGNATURE
TO .' SUBJECT
TO. SIGNATURE
DISC LONG BEACH COMMENTS ON TECH. MEMO, CONTINUATION OF CLEAN II
T. MAKHOUD SITB 24 SVB PILOT TEST. 00 2A
VARIOUS AGENCIES
SB
BECKTEL NATIONAL INC JANUARY 7, 1997, MEETING MINUTES ONE-DAY SVB PILOT
D. COMSER TEST AT SITB 24
VARIOUS INDIVIDUALS
BECHTEL NATIONAL INC JANUARY IS, 1997, MEETING MINUTES
D. COWSER
HCAS EL TORO
DTSC LONG BEACH COMMENTS ON AQUIFER TEST REPORT, SITB 24. OU 2A
T. MAKMOUD
MCAS EL iUHO
J. JOYCB
BECHTEL NATIONAL INC JANUARY 16, 1997, MEETING MINUTES
D. HALLBRBACH
SOUTHWEST DIVISION
R. SELBY
BECHTEL NATIONAL INC BASE REALIGNMENT AND CLOSURE CLEANUP PLAN (BCP)
J. KLUBSENER DATED MARCH 1997
VARIOUS AGENCIES
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
AOMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ALMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
TECH MEMO
OU
TBCH/GUID DOC.
MTC MINS
VOC
TECH/GUID DOC.
MTO MINS
TCB
FS
TBCH/GUID DOC.
COMMENTS
TBCH/GUID DOC.
MTO MINS
BCP
TEOi/CUID DOC.
BCP
CLEANUP
TECH/GUID DOC.
NFA
. . .SiC«. . .
24
OU 2A
24
2
24
OU 2A
It
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S
2
17
19
24
25
OU 2A
OU 28
OU 2C
TK FARM 2
TANK 39«
1
2
3
4
5
6
7
8
9
10
11
12 '
13
14
15
16
17
18
19
. . . .Location
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
HCAS BL TORO
SOUTHWEST DIVISION
NCAA BL TORO
This Admtnittiutiw Record (AR) Index Include* inference* to document* which cite bibliographical Murces.
-------
.
DATE - 09/19/97
UIC No. DOC. NO
DOCUMENT. TYPE..
CONTR/GUID. .NO.
. PRC.DATB
. DOC. DATE
fro MO
APPROX.I. OF. PAGES EPA. CAT!
M600SO 00174S
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continued
03/30/97
02/03/97
00071
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01/20/97
02/26/97
00073
10.4
03/19/97
01/06/97
00101
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01/17/97
01/11/9?
00073
01.4
TECHNICAL DOCUKENTS-OU2A. SITE 24. SOIL CLEANUP. MCAS EL TORO
FROM
FROM. SIGNATURE
TO SUBJECT CLASSIFICATION
TO. SIGNATURE
BECHTEL NATIONAL INC RESPONSE TO CAL EPA SOIL-RELATED COMMENTS, DRAFT ADMIN RECORD
D. COHSER PHASE II PS FOR SITE 34, OU 2A INFO REPOSITORY
VARIOUS AOUiCIBS '
'
BBCHTBL NATIONAL INC FEBRUARY 20, 1997, MEETING MINUTES ADMIN RECORD
P. BROOKS INFO REPOSITORY
VARIOUS AGENCIES
BECHTEL NMIONAL INC REPLACEMENT PAGES FOR THE BASE REALIGNMENT AND CLOSURE ADMIN RECORD
C. CAHLISLB (BRAC) CLEANUP PLAN (BCP) DATED MARCH 1997 INFO REPOSITORY
VARIOUS AGENCIES
BECHTEL NATIONAL INC DRAFT FINAL PHASE II REMEDIAL INVESTIGATION REPORT ADMIN RECORD
O. BROOKS OPERABLE UNIT 2A-SITB 24 VOLUME I, VOLUME 11, INFO REPOSITORY
SOUTHWEST DIVISION VOLUME III, APPENDICES h-J, VOLUME IV, APPENDICES X-P
KEY WORDS
PS
OU
SOIL
COMMENTS
RESPONSE
TECH/GUID DOC.
MTG MINS
FFA
ROD
LANDFILL
FS
GW
OU
TECH/GUID DOC.
CLOSURE
BRAC
CLEANUP
BCP
TECH/QUID DOC.
NFA
RI
TECH/GUID DOC.
. ..Site.. .
30
31
33
34
35
OU 1
OU 3
OU }
OU 2A
OU 28
OU 2C
OU 1A
OU IB
34
OU 3A
a
3
s
17
34
OU 1
OU 2A
11
OU 1
34
OU 3A
OU 1
3S
BLDO. 396
BLDO. 397
BUX3. 299
BLDO. 159
BLDO. 529
BLDO. 655
BLDO. tOO
BLDO. 126
BUM. 160
7
PAGE -
... Location. . . .
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCM EL TOKO
This Administrative Record (AH) Index Includes references to documents which die bibliographical sources.
These bibliographic citations are considered to be part of this AR but may not te cited separately In the index.
-------
DATS - 09/19/97
PAGE
TECHNICAL DOCUMENTS-OU2A. 8IT1 34. SOIL CLEANUP, MCAS EL TOKO
UIC Ho. DOC. NO.
DOCUMENT. TYPE. . .
CONTR/GOID..NO. .
APPROX.I. OP. PAGES
PRC.OATB
DOC. DATE
CTO.NO..
EPA.CATI
FROM
FROM SIGNATURE
TO
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SUBJECT
CLASSIFICATION
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01/11/97
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04/29/97
04/21/97
00000
04.1
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06/05/97
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01. 6
09/11/97
06/16/97
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09/11/97
07/11/97
00000
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10.4
09/18/97
07/11/97
00000
10.1
09/18/97
08/11/97
0011S
05.0
BECHTBL NATIONAL INC
0. BROOKS
SOUTHWEST DIVISION
DTSC LONG BEACH
T. MAXMOUD
MCAS EL TORO
J. JOYCE
BECIIfEL NATIONAL INC
C. CARLISLE
VARIOUS AGENCIES
EPA SAN FRANCISCO
MCAS EL TUXO
J. JOYCE
SOUTHWEST DIVISION
D. SAKAMOTO
O. COUNTY HATER DIST.
M. MILLS, JR.
HAHN BOMERSOCK CORP
J. BURQNBR
MCAS EL TORO
MCAS EL TORO
MEMBERS
MCAS EL TORO
CO
BECHTEI. NATIONAL INC
B. CuLfcMAN
BECHTEL NATIONAL INC
D. TEDALDI
VARIOUS AGENCIES
DRAFT FINAL PHASE II VADOSE ZONE FEASIBILITY STUDY
REPORT OPERABLE UNIT 2A-S1TB 24
COMMENTS OH DRAFT PROPOSED PLAN FOR OPERABLI UNIT 2A
SITE 24 -SOIL M/ENCLS
PROPOSED PLAN FOR OPERABLE UNIT 2A SITE 24 SOIL
VADOSB fcuNB CLEANUP
LETTER CLARIFYING NPL LISTING, UNCONTAMINATBD
PARCEL IDENTIFICATIONS, AND CERCLA LIABILITY ISSUES
INVOLVING TRANSFkXS OF FEDERALLY OWNED PROPERTY
REQUEST PORNMKITTEH RESPONSE ON A NEW DRAFT SETTLEMENT
AQREEMUrr FOR NEGOTIATINO ISSUES OF A JNT. VOC/WATER
SUPPLY PROJECT BETWEEN DON fc 0. COUNTY WATER DIST.
JULY 11, 1997, PUBLIC COMMENT MEETING PROPOSED PLAN
FOR ENVIRONMENTAL RESTORATION NO FURTHER ACTION SITES
IRP
JULY 11, 1997, PUBLIC COMMENT MEETING NO FURTHER
ACTION SITES HANDOUTS INCLUDES, PUbLIC COMMENT FORMS,
MEETING EVALUATION, AND SIGN-UP SHEETS
FAXED COPIES OF VARIOUS NEWS CLIPPINGS i PUBLIC
Nl/ilCE DATED JULY 11, 1997 PRESENTATION t DISCUSSION
MTO..IRP PROPOSED PLAN OU 2A-SITE 24.NRA , OU 1A
DRAFT RECORD OF DECISION OPERABLE UNITS 2A AND 1A
NO ACTION SITES
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ALMIN RECORD
INFO REPOSITORY
F8
TECH/QUID DOC.
COMMENTS
OU
SOIL
TECH/GUI D DOC.
OU
SOIL
CLEANUP
TECH/QUID DOC.
PUB. PARTICIPATI
NPL
CERCLA
TBCH/OUID DOC.
REQUEST
RESPONSE
VOC
TECH/GUID DOC.
PUB. PARTICIPATI
PUBNOT
NFA
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TECH/GUID DOC.
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TECH/GUID DOC.
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NFA
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OU
NFA
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...Site...
9
10
11
12
22
OU 2A
24
BLDO. 296
BLDO. 297
2A
24
OU 2A
2A
24
OU 2A
OU 2A
24
OU 1A
OU 2A
OU 1A
, . . .Location. . .
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS KL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
This Administrative Record (AR) Index includes references to documents which cite bibliographical sources.
TTHWbiblwgra^citatkMMaracoMkleradtobepartofthteAftbri
-------
DATE - 09/19/97
PAGE - 31
TECHNICAL DOCUNEHTS-OU2A. SITS 34. SOIL CLEANUP, MCAS EL TORO
UIC No. DOC. NO.
DOCUMENT. TYPE. . .
CONTR/GUID. .NO. .
APPROX . 1 . Or . PAoLJ
M60050 001968
MM
N6871192M670
U016
M600SO 001986
LTR
000000000000000
OUUS
M600SO 001977
MISC
000000000000000
0015
M600SO 00198S
LTR
000000000000000
0001
M600SO 001987
LTR
ooooooooooooooo
0006
M600SO 001978
MISC
N6871192D4670
0015
PRC.DATB
DOC. DATE
CTO.NO. .
EPA. CAT!
09/18/97
OB/25/97
00076
10.4
09/18/97
09/05/97
00000
01.6
09/19/97
09/16/97
00000
10.1
09/18/97
09/18/97
00000
01.6
09/18/97
09/18/97
00000
01.6
09/18/97
09/24/97
0061B
10.4
FROM
FROM. SIGNATURE
TO
TO. SIGNATURE
BECHTEL NATIONAL INC
D. TEDALDI
VARIOUS AGENCIES
MCAS EL TORO
J. JOYCE
VARIOUS AGENCIES
MCAS EL TORO
SOUTHWEST DIVISION
R. CALLAHAY
EPA SAN FRANCISCO
T. ESTRADA. ESQ.
MCAS EL TORO
J. JOYCE
VARIOUS AGENCIES
IBCT)
BECHTEL NATIONAL INC
D. TEDALDI
VARIOUS AGKaOIES
.... . .SUBJECT
AUGUST 6, 19»*. BCT MEETING MINUTES
ADVANCED SUBMITTAL OF FFA EXTENSION REQUEST FOR CHGES.
ON THE DRAFT FINAL INTERIM RECORD OF DECISION (ROD)
FOR OU 2A, OU 2B AND OU 2C
DRAFT RESPONSIVENESS SUMMARY MCAS EL TORO
PROPOSED PLAN. OUS 2A AND OU )A, NO ACTION SITES
.
INTERIM RECORD OP DECISION (ROD) OU 2A, SITE 24 VOC
SOURCE AREA! MODIFICATION OP THE LANGUAGE INCLUDED AT
THE END OP DRAFT FINAL ROD. SECTION 10.2.1.1
SUBMITTAL OP PFA EXTENSION REQUEST FOR CHANGES
ON THE DRAFT FINAL INTERIM RECORD OF DECISION (ROD)
FOR OU 2A. OU 2B AND OU 2C
SITE IB) BASEWIDB COMMUNITY RELATIONS SUPPORT-RAB
MTINO MAILER- RAB MTINO AGENDA t PUBLIC NOTICE 9/24/97
RAB MTO. MIN. 8/6/97 RAB MTG. (MAILER IN CONF1DTL FILE)
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
MTO MINS
TECH/CUID DOC.
PPA
REQUEST
ROD
TBCH/OUID DOC.
NFA
OU
TBCH/OUID DOC.
ROD
VOC
TECH/OUID DOC.
FFA
REQUEST
ROD
TECH/CUID DOC.
CRP
RAB
MTO MINS
TECH/CUID DOC.
PUB. PARTICIPATX
. . .sic*.
s
17
24
OU 2A
OU 2B
OU 2C
24
2
17
10
11
15
19
20
21
22
25
OU 2A
24
OU 2A
OU 2B
OU 2C
24
25
2
17
1
S
24
OU 2A
OU }
OU 1A
2S
4
6
9
10 .
11
15
19
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHVkST DIVISION
MCAS EL TORO
,
Thi8 Administrative Record (AR) Index Includes references to documents which cite bibliographical sources.
These bibliographic citations are considered to be part of lhl$ AR but may not be cited separately In the Index.
-------
DATS - 09/19/97 P*OB - at
TECHNICAL DOCUNBHTS-OU2A, SITS 34, SOIL CLEANUP, MCAS EL TOKO
UIC No. DOC.NO. PRC.OATB PROM
DOCUMENT.TYPE. .. DOC.DATE FROM. SIGNATURE
CONTR/CUID. .NO.. CTO.NO.. TO SUBJECT CLASSIFICATION KEYWORDS ...Sit* Location
APPROX.*.OF.PAGES EPA.CAT* TO.SIGNATURE
N600SO 001978 continued
20
21
22
25
Thl* Administrative Record (AR) Index Includes reference* to document* whteh cite bibliographical source*.
:ciutwM»»»<^»kfcredto^
-------
TOTAL RECORDS PRINTED, 192
REPORT SPECIFICATION FOR, RPT443
TITLEi TECHNICAL DOCUMENTS-OU2A, SITE 34, SOIL CLEANUP, MCAS EL TORO
FILE, COMU1NED Key Info, with Activity Pile
SELECTION CRITERIA:.
(01) Kay Words CONTAINS •TECH/GUID DOC.* t UIC.Ho. IS "M600SO •
SORT CRITERIA,
01 Doc. D»t«
PAGE BHKAK LEVEL:
00 NO fAU£BREAX
TYPE REPORT FORM
PAPER COMBO KEY INTO (Met** Mtlvlty cpc lotmt
Thi* AdmlnlstraUv* Record (AR) lnd«x Includes references to document* which cite bibliographical sources.
Tr^bibfoflraphfccifct»n*v««r»kUr»d^
-------
PUBLIC PARTICIPATION DOCUMENTS
-------
DATE - 09/19/97
PACE -
PUBLIC PARTICIPATION DOCUMENTS- HCAS EL TORO (SORT BY DOCUMENT DATS)
UIC NO. DOC. NO.
DOcVMKNT.TYPE. ..
CONTR/GUID. .NO. .
APPRO*. «. OP. PAGES
M600SO OOOoSo
RPT
N6871189D9296
0075
M60050 001134
LTR
000000000000000
0001
M600SO 0001SS
LTR
000000000000000
M600SO 000417
RPT
000000000000000
0005
M600SO 000097
LTR
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M600SO 001014
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N6B71189D9296
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M600SO 000546
HISC
000000000000000
000$
H600SO 000*92
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HISC
00000000000000
0011
PRC.DATE
DOC. DATE
CTO.NO. .
EPA. CAT*
07/19/95
11/01/85
00018
01.2
12/22/95
01/31/88
00000
01.6
11/01/93
12/21/19
00000
10.1
07/05/94
02/01/91
00000
10.1
ii/oi/s>3
02/13/91
00000
10.1
12/01/95
04/01/91
00011
01.6
07/07/94
11/01/91
00000
09.3
07/19/95
11/01/91
00000
10.6
03/24/97
U/1H/91
00000
10.4
FROM
FROM S ICNATUHE
TO
TO SIGNATURE
H.R. MILLS ASSOC.
HCAS EL TORO
CRHQCB RIVERSIDE
J. R. FAUJJCE
M.-AS EL TORO
B. MAVITV
WVHA
MCAS EL TORO
M. ALONZO
DBPT. H 4 H
L. NUZUM
SOUTHHK8TDIV
JACOBS BMQINUbliiiiO
J. DOLBQOMSKI
SOUTHHBST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TWO
SUBJECT
FINAL REPORT TO ORANGE COUNTY HATER DISTRICT
TRICHLOROBTHYLENE INVESTIGATION NEAR TUB EL TORO
MARINE AIR STATION
MEMBERSHIP FOR THE MCAS EL TORO TRC IS BEING SOUGHT
TCB CLEANUP CITIZENS ADVISORY COMMITTEE REQUEST FOR
MCAS EL TORO REMEDIAL INVESTIGATION WORK PLAN
RESPONSES TO PUBLIC COMMENTS CONCERNING MCAS EL TORO
FEDERAL FACILITY AGREEMENT.
RUSK)HS.I> TO PUBLIC COMMENTS CONCERNING MCAS EL TORO
FEDERAL FACILITY AGREEMENT
MARCH 20. 1991 TRC MBITINQ MINUTES
FACT SHEET i THE ENVIRONMENTAL CLEANUP OF MARINE CORPS
AIR STATION EL TORO.
FACT I IIEBT -DESCRIBING INVESTIGATION OF POSSIBLE
HAZARDOUS HASTE CONTAMINATION*
PUBLIC FORUM AGENDA
HITH HANDOUTS
CLASSIFICATION
ADMIN
ADMIN
ADMIN
RECORD
RECORD
RECORD
ADMIN RECORD
INFO REPOSITORY
AlJMIN
ADMIN
ADMIN
ADMIN
RECORD
RECORD
RECORD
RECORD
ADMIN RECORD
INFO REPOSITORY
KEY HOKDS
TCE
PUB. PARTICIPATI
TRC
PUB. PARTICIPATI
TCB
CLEANUP
RI
PUB. PARTICIPATI
FFA
COMMENTS
PIM
PUB. PARTICIPATI
FFA
COMMENTS
PUB. PARTICIPATI
NTH MIKB
TRC
PUB. PARTICIPATI
HAZ MASTS
PUB. PARTICIPATI
HAZ HASTE
PUB. PARTICIPATI
OU
CBRCLA
RI
PUB. PARTICIPATI
...Site...
OU1
OU1
11
1,2,1,4,5,
6,7,1,9,10
11,12,13,
14,15,16,
17,11,19.
20,21,22
OU I
ou a
OU 4
M
2
3
5
10
17
1
4 . ..
. . . .Location/
SOUTHWEST DIVISION
MCAS EL TORO
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
NCM EL TOM
Thi* Administrative Rvcord (AR) Index Includes references to document! which cite bibliographical Murce*.
Thet* bibliographic cgalion* are con»«vtd to be part of ihU Aft but may not b* cited t^uBtejy In the Index
-------
DATS - 99/19/91
PUBLIC PARTICIPATION MOMENTS- MCAS El. TOKO (SORT BY DOCUMENT OATt)
PAGE
UIC No.
DOC. NO.
DOCUMENT TYPE . . .
CONTR/GUID NO
PRC.DATE
DOC. DATE
OTO HO
APPROX.I. OK. PAGES EPA. CAT*
M60050
M60050
LTR
PROM
FROM. SIGNATURE
TO.SIGNAIUKB
KEY WORDS
001834 continued
000555
OOOOOOOOiiuOOOOO
0004
M600SO
MI6C
000891
000000000000000
0002
M600SO
MM
001028
N6B71189D9296
0026
M60050
MISC
000890
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0008
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000861
N68711B9D9296
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N68711«!ll>»296
0034
06/19/96
12/09/91
00000
10.5
07/19/95
12/01/92
00000
10.6
12/Ok/VS
12/17/92
0014S
01.6
07/19/95
12/01/93
00000
10.6
07/18/95
03/11/94
00145
10.5
07/18/95
05/20/94
0014S
10.4
MCAS EL TORO MINUTE fROM THE NOVEMBER 18, 1991 PUBLIC FORUM HELD ADMIN RECORD
L.G. SERAFINI TO DISCUSS THB REMEDIAL INVESTIGATION
US EPA
J. HAMILL
SOUTHWEST DIVISION FACT 6HELT 'UPDATE OF THB ENVIRONMENTAL INVESTIGATIONS ADMIN RECORD
AT MCAS EL TORO-
JACOBS ENGINEERING DECEMBER 17. 1992 TRC MEETING MINUTES ADMIN RECORD
SOUTHWEST DIVISION
SOUTHWEST DIVISION FACT SHEET 'UPDATE OF THB ENVIRONMENTAL INVB8TIQATIONS ADMIN RECORD
AT MCAS EL TORO'
JACOBS ENGINEERING TECHNICAL REVIEW COMMITTEE (TRC) RAB MEETING SUMMARY ADMIN RECORD
J. DOLEGOWSKI
SOUTHWEST DIVISION
A. PISZXIN
JACOBS ENGINEERING RAB MEETING SUMMARY ADMIN RECORD
J. DOLEGOWSKI
SOUTHWEST DIVISION
A. PISZKIN
RI
TCB
PUB. PARTICIPATI
PUBNOT
PUB. PARTICIPATI
TRC
MTO MINS
PUB. PARTICIPATI
PUBNOT
PUB. PARTICIPATI
TRC
MTO MINS
PUB. PARTICIPATI
RAB
MTO MINS
PUB. PARTICIPATI
. . .Site. . .
C
7
1
9
11
12
13
14
IS
16
19
20
21
22
OU1.0U2.
OU3.0U2A
OU2B.OU2C
1.2,1,4,5,
6,7,1,9,10
11,12,13,
14.15.K,
17,18,19,
20,21,22
24,25
1,2,1,4,S,
6,7,8,9,10
11.12,13,
14,15,16,
17,19,20,
21,22
Location
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
This Administrative Record (AR) Index Includes references to documents which cite bibliographical source*.
Tr*Mbibikwsphtot44iJonsaraconf^rrt^
-------
DATE - 09/19/97
PACE
PUBLIC PARTICIPATION DOCUMENTS- MCAS EL TWO (SORT BY DOCUMENT DATE)
UIC NO. DOC. NO.
DOCUMENT. TYPE. . .
CONTR/UU1U NO. .
API'kOX.g. OP. PACES
M60050 001417
MISC
000000000000000
0025
M60050 000714
LTR
000000000000000
0046
MtOOSO 00072*
LTR
000000000000000
0002
N60050 001416
MISC
000000000000000
0015
M600SO 001419
MISC
000000000000000
0015
M600SO 001440
MISC
000000000000000
0020
H60050 001441
MISC
000000000000000
0020
M60050 001422
MISC
000000000000000
0001
M60050 001444
MISC
000000000000000
0020
M60050 001421
MISC
000000000000000
0001
PRC.DATB
DOC. DATS
CTO NO
EPA. CAT!
04/06/96
OB/16/94
00061
10.0
06/15/95
06/25/94
00000
10.4
06/1S/9S
09/19/94
00000
10.4
04/08/96
10/12/94
00061
10.0
04/01/96
12/11/94
00061
10.0
04/08/96
01/11/95
00061
10.0
04/06/96
02/26/95
00061
10.0
04/01/96
01/24/95
00061
10.0
04/06/96
01/25/95
00061
10.0
04/01/96
04/30/95
00061
10.0
FROM
FROM SIGNATURE
'it,).
TO. SIGNATURE
MCAS EL TORO
GENERAL PUBLIC
MCAS EL TOKO
J. JOYCE
RAB MEMBERS
MCAS EL TORO
D. CHANDLER
RAB MEMEBERS
MCAS EL TORO
GENERAL PUBLIC
MCAS EL TORO
GENERAL PUBLIC
MCAS EL TORO
GENERAL PUBLIC
MCAS EL TORO
GENERAL PUBLIC
VARIOUS NEWSPAPERS
PUBLIC
MCAS EL TORO
GENERAL PUBLIC
VARIOUS NEWSPAPERS
PUBLIC
SUBJECT
2 JUNE 1994 MCAS EL TORO RESTORATION ADVISOkl BOARD
MEETING AGENDA, MINUTES, HANDOUTS AND MATERIALS FOR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
RAB MEETING MINUTES, AGENDA AND RAB CHARTER DRAFT
RAD MEMBERS RCtlONATIONS. PRXOMITIU, I8SUU t
Ct^MUNITY CONCERNS SITS 1<
12 OCTOBER 1994 MCAS EL TORO RESTORATION ADVISORY
KESTJNO AGENDA, MINUTES, HANDOUTS AND MATERIALS FOR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
11 DECEMBER 1994 MCAS EL TORO RESTORATION ADVISORY
MEETING AGENDA, MINUTES, HANDOUTS AND MATERIALS FOR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
11 JANUARY 1995 MCAS EL TORO RESTORATION ADVISORY
MEETING AGENDA, MINUTES, HANDOUTS AND MATERIALS FOR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
2* FEBRUARY 1995 MCAS EL TORO RESTORATION ADVISORY
MEETING AGENDA, MINUTES, HANDOUTS AND MATERIALS KIR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
PUBLIC NOTICE ANNOUNCING THE 10 MARCH 1995 RESTORATION
ADVISORY BOAKU MEETING PRINTED IN ORANGE COUNTY
REGISTER, LOS ANGELES TIMES, AND THE IRVINE WORLD NEHS
22 MAY 199S MCAS EL TORO RESTORATION ADVISORY
MEETING AGENDA, MINUTES, HANDOUTS AND MATERIALS FOR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
PUBLIC NOTICE ANNOUNCING THE 27 APRIL 1995 RESTORATION
ADVISORY BOARD MEETING PRINTED IN ORANGE COUNTY
REGISTER, LOS ANGELES TIMES, AND THE IRVINE WORLD NEWS
CLASSIFICATION
ADMIN RECORD
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADM 11) RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
ADMIN RECORD
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD .
INFO REPOSITORY
KEY WORDS
RAB
KTQ MINS
PUBNOT
PUB. PARTICIPATI
MTO MINS
PUB. PARTICIPATI
MTO MINS
PUB. PARTICIPATI
HAB
MTO MINS
K1BNOT
PUB. PAHTICIPATI
RAB
MTO MINS
PUBNOT
PUB. PARTICIPATI
RAB
MTO NIKS
PUBNOT
PUB. PARTICIPATI
RAB
MTO MINS
PUBNOT
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
RAB
MTO MINS
PUBNOT
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
. . .Sit* Location
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TORO
1* SOUTHWEST DIVISION
MCAS RL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS BL TORO
This Adinlnltlrative Record (AR) Index Include* reference* to document* which cHe bibliographic*! sources.
The»e bibliographic citation* an coraJderad to be part of tN*AR but may not be cited terja/ately in the Index.
-------
DATE - 09/19/91
PAGE -
PUBLIC PARTICIPATION DOCUMENTS- MCAS EL TOKO (SORT »Y DOCUMENT DATS)
UIC No. HOC. HO.
DOCUHLI«r.TYPE. .
COliTH/GUID NO
APPROX t OK.IA.jLS
MoUOSO 001441
MISC
000000000000000
0020
M600SO 001424
MliC
000000000000000
0003
M600SO OOim
MISC
000000000000000
0014
M60050 001«i45
MISC
OOOuuOOOOOOOOOO
0001
K600SO 001)69
MISC
N6871192D4670
00)0
M600SO 000966
MM
000000000000000
0016
M600SO 001067
MM
000000000000000
0007
M600SO 00144S
MliC
000000000000000
0020
M60050 001426
MISC
ooooooooooooooo
ooos
PRC.DATB
DOC. DATE
CTO NO
EPA. CAT*
04/01/96
04/27/95
0006)
10.0
04/01/96
05/19/95
0006)
10.0
Ul/14/96
05/11/95
00059
10.0
04/01/96
07/20/9S
0006)
10.0
01/19/96
07/2S/9S
0006)
10.6
08/29/9S
07/27/5)5
00000
10.4
12/11/95
07/27/95
00000
10.4
04/08/96
07/27/95
00061
10.0
04/01/96
08/24/95
0006)
10.0
PROM
fROM MuNATURB
TO
TO SIGNATURE
MCAS EL TORO
GENhKAL PUBLIC
VARIOUS NEWSPAPERS
PUBLIC
BECXTEL NATIONAL INC
SOUTHWEST DIVISION
OC REGISTER
PUBLIC
BECHTBL NATIONAL INC
D. CuflSBR
SOUTHWEST DIVISION
J. PAYNK
RAB MEMBERS
MCAS EL TORO
RAB MEMBERS
MCAS EL TORO
GENERAL PUBLIC
VARIOUS NEWSPAPERS
PUBLIC
, . . , SUBJECT
37 APRIL 1995 KCAS EL TORO RESTORATION ADVISOR*
MEETING AGENDA, MINUTES, HANDOUTS AMD MATERIALS FOR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
PUBLIC NOTICE ANNOUNCING THE 25 MAY 1995 RESTORATION
J.DVISORY BOARD MEETING PRINTED IN ORANGE COUNTY
REGISTER
MAY 11, 1>9S RESTORATION ADVISORY BOARD MEETING
MINUTES AND MEETING SIGN-IN CHESTS
PUBLIC NOTICE ANNOUNCING THE 27 JULY 1995 RESTORATION
ADVISORY bOARD MEETING PRINTED IN ORANGE COUNTY
REGISTER
FINAL MCAS EL TORO FACT SHEET 1) AND MAILING LIST
JULY 37. llfl RAB MEETING MINUTES
JULY 27, 1995 RAB MEETING MINUTES
27 JULY 1995 MCAS EL TORO RESTORATION ADVISORY
MEETING AGENDA, MINUTES, HANDOUTS AND MATERIALS FOR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
PUBLIC NOTICE ANNOUNCING THE 11 AUGUST 1995
RESTORATION ADVISOHY BOARD MEETING PRINTED IN THE
ORANGB COUNTY REGISTER, TUSTIN WEEKLY, AND LA TIMES
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INTO REPOSITORY
KEY WORDS
RAB
MTO MINS
PUBNOT
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
MTO MINS
RAD
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
PUB. PARTICIPATI
MTO MIHS
PUB. PARTICIPATI
MTG MINS
RAB
PUB. PARTICIPATI
RAB
MTG MINS
PUBNOT
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
...Slttt Location... .
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
OU2 SOUTHWEST DIVISION
34,35,3.), MCAS EL TORO
5,17
OU)
OU1.0U3 SOUTHWEST DIVISION
OU2A,OU2B
OU2C.OU)
1.2.1,4,5,
6,7,8,9.10
11,12,11,
14,15,16
17,18,19
20.31,22
24,25
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Thl* Administrative Record (AR) Indax Include* references to documents which dte bibliographical sources.
These bibliographic tiUUora am considered to be part of this AR but may not be died separately in the Index.
-------
DATE - 09/19/»7
PAGE
PUBLIC PARTICIPATION DOCUMENTS- MCAS BL TORO (SORT BY DOCUMENT OATH)
UIC NO. DOC. NO.
DOCUMENT. li'PE. . .
CONTR/GUID NO
APPROX . 1 , OF . PAGES
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M600SO 001116
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PRC.DATB
DOC. DATE
CTU NO
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04/08/96
08/11/95
00061
10.0
04/01/96
09/18/95
00061
10.0
01/11/96
09/20/95
00061
10.0
04/08/96
09/28/95
00061
10,0
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01/20/96
10/09/95
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10/19/95
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04/08/96
11/10/95
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FROM
FROM. SIGNATURE
TO . .
TO, JIUNATURB
MCAS BL TORO
RAB MEMBERS
VARIOUS NEWSPAPERS
PUBLIC
BECHTBL NATIONAL INC
A. SCHWARTZ
MCAS BL TORO
D. CHANDLER
MCAS EL TORO
GENERAL VUBLIC
BECIITEL NATIONAL INC
D. COHSKR
SOUTHWEST DIVISION
P. KENNEDY
BECHTBL NATIONAL INC
J. KLEUSENBR
SOUTHWEST DIVISION
P. KENNEDY
VARIOUS NEWSPAPERS
PUBLIC
MCAS EL TORO
COMMUNITY MEMBERS
BECHTEL NATIONAL INC
RAB
MCAS EL TORO
GENERAL PUBLIC
SUBJECT
11 AUGUST 1995 RESTORATION ADVISORY BOARD MELTING
AGENDA. MINUTES. HANDOUTS AND MATERIALS FOR
PRESENTATION AND PUBLIC NOTICE ANNOUNCING MEETING
PUBLIC NOTICE ANNOUNCING THE 28 SEPTEMBER 1995
RESTORATION ADVISORY BOARD MEETING AND APPLICATION
PERIOD APPEARING IN VARIOUS LOCAL NEWSPAPERS
MCAS TUCTIN/MCAS BL TORO RESTORATION ADVISORY BOARD
MEMBERSHIP RECRUITMENT PACKAGE AND PUBLIC NOTICE
ANNOUNCINU MEMBERSHIP
28 SBPTtMUKR 1995 MCAS EL TORO RESTORATION ADVISORY
MEETING AGENDA. MINUTES. HANDOUTS AND MATERIALS FOR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
27 JULY 1995 AND 11 AUGUST 1995 RESTORATION ADVISORY
BOARD MEETINU MINUTES AND RAB SUBCOMMITTEE ROMER
FINAL MCAI BL TORO FACT •KBIT 14, INCLUDES MAILING
LIST
PUBLIC NOTICB ANNOUNCING 26 OCTOBER RESTORATION
ADVISORY BOARD MEETING FOUND IN LA TIMES AND ORANGE
COUNTY REGIME*
FACT SHEET NO. 5 UPDATE ON ENIRONMENTAL RESTORATION
PROGRAM AT MCAS EL TORO
PUBLIC INFORMATION MATERIALS FOR 11/10/iiO RAB MEETING
INCLUDING: 10/26/95 RAB MEETING MINUTES AND 10 NOVEMBER
1995 RAB MEETING HANDOUTS
10 NOVEMBER 1995 MCAS EL TORO RESTORATION ADVISORY
MEETING AGENDA. MINUTES. HANDOUTS AND MATERIALS FOR
PRESENTATIONS, AND PUBLIC NOTICE ANNOUNCING MEETING
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
RAB
MTG MINS
PUBNOT
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
RAB
PUB. PARTICIPATI
RAB
MTG MINS
PUBNOT
PUB. PARTICIPATI
RAB
MTG MINS
PUB. PARTICIPATI
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
PUB. PARTICIPATI
RAB
KTO MINS
PUB. PARTICIPATI
RAB
MTG MINS
PUBNOT
PUB. PARTICIPATI
...Sit* Location
souTiMtvr ui vi. .-ION
MCAS BL TORO
SOUTHWEST Division
MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
Thlt AdmJni»l/aUv« Pwcord (AR) Index Includes reference* to document! which cite bibliographical eources.
Th«»e bibliographic uuu
-------
DATE - 09/19/97
PUBLIC PARTICIPATION DOCUMENTS- HCAS EL TORO (SORT BY DOCUMENT DATS)
PAOB • t
UIC NO. DOC. NO.
DOCUMENT. TYPE. . .
CONTR/CUID. NO. .
APPROX . 1 . OP . PACES
M600SO 001409
LTR
000000000000000
0007
M60050 001213
HISC
N6I71192D4670
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H600SO 001411
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LTR
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M600SO 001410
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OOOOOOOOOOOOOOO
000)
M600SO 0014SO
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0040
M60050 0014)1
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0001
M600SO 0014)4
MISC
N6871192fN670
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M600SO 001274
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N6871192D4670
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01/11/96
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01/17/96
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01/22/»b
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01/25/96
01/22/96
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10.1
04/01/96
01/24/96
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04/01/96
01/31/96
0006)
10.0
04/01/96
02/21/96
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10.0
04/01/96
02/21/96
0061B
10.0
03/07/96
02/21/96
0061B
10.0
FROM
PROM. SIGNATURE
TO
TO. SIGNATURE
RAB MEMBER
L. SIBVERS
RAB
M. RUDOLPH
BECHTEL NATIONAL INC
H. MASRI
SOUTHWEST DIVISION
»•. KENNEDY
CITY OP IJUCE FOREST
R. HOODINUS
HAB
H. RUDOLPH
RAB
M. KUDOLPH
MCAS EL TORO
J. J.JVCB
RAB MEMBER
A. OLQUIH
RAB
M. RUDOLPH
VARIOUS KKHSPAPERS
PUBLIC
MCAS EL TORO
GENERAL PUBLIC
OC REGISTER
PUBLIC
BECHTEL NATIONAL INC
D. COHSER
SOUTHHEST DIVISION
P. KENNEDY
BECHTEL NATIONAL INC
D. COHSER
SOUTHHEST DIVISION
P. KENNEDY
SUBJECT
RAB KbMBER COMMENTS ON DRAFT FINAL UPDATED COMMUNITY
RELATIONS PLAN FOR MCAS TOST IN AND MCAS EL TORO
31 JANUARY 1996 RESTORATION ADVISORY BOARD DRAFT
MEETING AGENDA. PROPOSED CHANGES TO RAB| MISSION
STATEMENT AND OPERATING PROCEDURES. 1996 SCHEDULE
CITY OF LAKE FCaiST COMMENTS ON DRAFT FINAL UPDATED
COMMUNITY RELATIONS PLAN FOR MCAS TUSTIN AND MCAS EL
TORO
RESTORATION ADVISORY BOARD COMMENTS TO DRAFT FINAL
UPDATED COMMUNITY RELATIONS PLAN
RAB MEMBER COMMENTS ON DRAFT FINAL UPDATED COMMUNITY
RELATIONS PLAN FOR HCAS TUSTIN AND MCAS EL TORO
PUBLIC NOTICE ANNOUNCING 11 JANUARY RESTORATION
ADVISORY BOARD MEETING POUND IN LA TIMES
AND ORANGE COUNTY REGISTER
11 JANUARY 1996 MCAS EL TORO RESTORATION ADVISORY
MEETING AGENDA, MINUTES. HANDOUTS AND MATERIALS FOR
PRESENTATIONS. AND PUBLIC NOTICE ANNOUNCING MEETING
PUBLIC NOTICE ANNOUNCING 28 FEBRUARY RESTORATION
ADVISORY BOARD MEETING FOUND IN ORANGE COUNTY
REGISTER
2( FEBRUARY 1996 RESTORATION ADVISORY BOARD MEETING
AGENDA AND PUBLIC NOTICE, RAB INSTAIOATION RESTORATION
PROGRAM TOUR ANNOUNCEMENT AND MAIL LIST ALSO INCLUDED
BASEHIDE COM* '.U if RELATIONS SUPPORT - 1/11/96
RESTORATION ADVISORY BOARD MEETING MAILER INCLUDES
DRAFT MEETING MINUTES
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INPO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN MECORD
INFO REPOSITORY
KEY WORDS
CRP
COMMENTS
PUB. PAHTICIPATI
RAB
PUB. PARTICIPATI
COMMENTS
CRP
PUB. PAMTICIFATI
COMMENTS
CRP
PUB. PAHTICIPATI
COMMENTS
CRP
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
RAB
HTO MINS
PUBNOT
PUB. PARTICIPAVC
PUBNOT
RAB
PUB. PARTICIPATI
RAB
PUBNOT
PUB. PARTICIPATI
RAB
PUB. PARTICIPATI
. . .Sit* Location
SOUTHHEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
HCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHHEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHHEST DIVISION
MCAS EL TORO
SOUTHHEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Thlt Admlntetrativii Record (AR) Index include! reference* to document* which dte bibliographical source*.
b^rtptyc citataMit art coraid*^
-------
DATE - 09/19/97
PAGE -
HJBLIC PARTICIPATION DOCUMENTS- MCAS BL TORO (SORT BY DOCUMENT DATS)
UIC No. DOC. NO.
DOCUMENT. TYPE. . .
CONTR/GUID. ,NO. .
APPROX . 1 .OF . PAGES
M60050 001402
HISC
000000000000000
0025
M60050 OU14S1
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N68V1192D4670
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M60050 001412
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M600SO 001982
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M600SO 001524
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M600SO 000909
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OOOOOOOOOOOOOOO
0003
M600SO 001514
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N6871V2U46VOOOO
0010
PRC.DATB
DOC. DATS
CTO NO
EPA CATI
01/20/96
02/27/94
OOObl
10.0
04/08/96
01/01/96
00061
10.2
04/01/96
Ol/Ob/96
00061
10.0
09/18/97
04/24/96
00000
10.4
07/01/96
04/25/96
00061
10.0
06/19/96
05/19/96
00061
10.1
07/19/9S
OS/21/96
0061B
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06/06/96
OS/22/96
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07/01/96
OS/29/96
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PROM
FROM. SIGNATURE
TO. . . '
TO. SIGNATURE
MCAS EL TORO
C. WIEMERT
BECHTBL NATIONAL INC
B. COLEMAN
UECHTEL HAT10NAI. 1UC
A. SCHWARTZ
SOUTHWEST DIVlbiuN
MCAS bL TORO
BASE RESIDENTS
MCAS EL TORO
RAB MEMBERS
BECHTBL NATIONAL INC
D. COHSER
SOUTHWEST DIVISION
p. KUINEOY
MCAS kL TORO
J. JuYCE
BECHTEL NATIONAL INC
B. COLEMAN
BECHTEL NATIONAL INC
D. CGfJKR
SOUTHWEST DIVISION
P. KENNEDY
VARIOUS NEWSPAPERS
GENtkAL PUBLIC
MCAS EL TORO
RAB ATTENDEES
SUBJECT
DOCUMENTS FOK 21 AND 24 FEBRUARY 1996 MCAS EL TORO
RAB TOUR INCLUDES TOUR INFORMATION. PUBLIC NOTICE
AND TOHM HALL PLlk>K
FINAL UPDATED COMMUNITY RELATIONS PLAN FOR MCAS EL
TORO
FLIER ANNOUNCING A 'TOWN HALL MEETING- FOR RESIDENTS
OF MCAS BL TORO HELD ON 6 MARCH 1996 TO DISCUSS
CLEANUP OF CONTAMINATED SOILS, USTS US I NO TECHNOLOGIES
PUBLIC INFORMATION MATERIALS FOR APRIL 24. 1996.
MEETING-AGENDA. HANDOUTS, fc MINUTES OP FEBRUARY 28.
1996, SIGN IN SHEETS OF 4/24/96 RAB MTO.
FINAL MCAS EL TORO FACT SHEET 16, UPDATE ON
ENVIRONMENTAL RESTORATION PROGRAM AT MCAS BL TORO
*
PUBLIC NOTICES ANNOUNCING THE APRIL 24, 1996
RESTORATION ADVISORY BOARD MEETING
SITE B BASEMIDB COMMUNITY RELATIONS SUPPORT - 5/29/96
RAB MEETING MAILEK INCLUDES DRAFT AGENDA AND MINUTES
FROM 24 APRIL 1996 RAB AND PUBLIC NOTICE/MTO ANNOUNCE
PUBLIC NOTICES APPEARING IN THE OKAWJK COUNTY REGISTER
IRVINE WORLD NEWS AND LA TIMES ANNOUNCING 29 MAY 1996
RESTORATION ADVISORY bOAMD MEETING
29 MAY 1996 RESTORATION ADVISORY BOARD AGENDA, MINUTES
FROM 24 APRIL 1996 HAU MELTING, AND HANDOUTS FKOM
29 MAY 1996 RAB MEETING
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
AUMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
'
RAB
PUB. PARTICIPATI
CRP
PUB. PARTICIPATI
PUBNOT
PUB. PARTICIPATI
PUB. PARTICIPATI
PUBNOT
RI
GH
TECH/GUI D DOC.
FACTSHBBT
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
RAB
PUBNOT
PUB. PARTICIPATI
RAB
PUUNOT
UST
PUB. PARTICIPATI
RAB
MTO M1NS
UST
PUB. PARTICIPATI
OUI.OU2, SOUTHWEST DIVISION
001,1,2,1, MCAS EL TORO
4,5,6,7,8,
9,10.11,13
13,14,15
16,17.18
19,20,21
24,25
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
TANK 198 SOUTHWEST DIVISIOI
OU 2A MCAS EL TORO
24
25
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
HCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TOKO
This Admlnt*traUv« Record (AH) Indtuc Include* reference* to document! which cite bibliographical tources.
The**) bibliographic tiUiiont am contidjrwl to be part of tru* AR but rtwynotbecttedteparat^ylftUMtindex.
-------
' DATE • 09/19/97
| PUBLIC PARTICIPATION DOCUMENTS- MCAS EL TORO (SORT BY DOCUMENT DATS)
. ..
PAOB
DOCUHEHT TYPE.. .
CONTR/GUID NO
APPROX . I . OF . PAGES
M600SO 001513
HISC
N687192D4670UUU
0010
M600SO 00177S
HISC
000000000000000
0001
M600SO 00160
MISC
000000000000000
0001
M600SO 001818
MISC
000000000000000
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M600SO 001SBO
MISC
000000000000000
0002
M60050 00170)
MISC
000000000000000
0001
MCOOSO 001674
XKTL
N6871192D4670
OOOS
M600SO 001911
MISC
000000000000000
0050
M600SO 001727
KM
N6871192D4670
0006
DOC DATS
CTO MO
CPA.CATI
07/01/96
06/26/96
0061B
10.0
01/20/97
07/24/96
00000
10. «
09/27/9C
07/2S/96
00000
10.6
01/21/97
07/11/96
00000
10.4
09/18/97
07/11/96
00000
10.1
11/11/96
01/26/96
00000
10.6
09/10/96
09/20/96
0061B
10. S
09/18/97
09/25/96
00000
10.4
11/21/96
11/20/96
0061B
10.4
FROM. SIGNATURE
To
TO.SIGNATURB
BECHTEL NATIONAL INC
J. KLEUSENER
SOUTHWEST DIVISION
P. KENNEDY
ORANGE CO. REGISTER
PUBLIC INTEREST
LOS ANGELES TIMES
ORANGE CO. RED.
PUBLIC NOTIFICATION
MCAS EL TORO
RAB MEMBERS
RAB COMMUNITY CO-CHR
M. RUDOLPH
ALL RAB MEMBERS
BNI SAN DIEGO
D. COHSER
SOUTHWEST DIVISION
R. SELBY
MCAS EL TORO
RAB MEMBERS
BECHTEL NATIONAL
D. COWSER
SOUTHWEST DIVISION
R. SELBY
,.,., . . .. , ... SUBJECT
BASEUIDB COMMUNITY RELATIONS SUPPORT - MAILER OP
DRAFT MEETING MINUTES FROM 29 MAY 1996 RESTORATION
ADVISORY BOARD MEETING, INCLUDES MAILING LIST
JULY 11, 1996 PUBLIC NOTICE OF MCAS EL TORO AND TUSTIN
RAB MEETING
NEWSPAPER ARTICLES • PUBLIC NOTICE NEWS ADS OF JULY
11, 1996 RAB MLhTINO-
RAB MISSION STATLMENT AND OPERATING PROCEDURES
PUBLIC INFORMATION MATERIALS FOR JULY 11, 1996, KAB
MEETING-AGENDA. HANDOUTS, t MINUTES FROM MAY 29, 1996
RAB HttTINO (W/0 ENCLS)
FAXED ANNOUNCEMENT REGARDING FUTURE RAB SUB-COMMITTEE
MEETING TO Bg HELD ON WEDNESDAY, AUuOST 28, 1996
SITE (B) BASEHIDE COMMUNTIY RELATIONS SUPPORT- IR
UPDATE AND MAINTENANCE DTE EEPTEMbER 20, 1996
PUBLIC INFORMATION MATERIALS FOR SEPTEMBER 25, 1996,
MEETING-AGENDA, i.«MDOUTS, t MINUTES OF JULY 11, 1996
RAB MTG., SIGN- IN SHEETS, REV. 'BLUE SHEET*
SITE IB) BASEWIDS CRS- RAB MEETING MAILER-REVISED
DRAFT RAB MEETING AGENDA FOR 12/4/96 EL RAu MEETING
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
K£Y MORDS
RAB
MTO MIKS
UST
PUB. PARTICIPATI
PRESS RSL
RAB
do
PUBNOT
PUB. PARTICIPATI
PUBNOT
PUB. PARTICIPATI
RAB
PUB. PARTICIPATI
RAB
MTO MINS
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
PUB. PARTICIPATI
PUB. PAHTIC1PATI
PUBNOT
KTO MINS
TECH/QUID DOC.
RAB
MTO MINS
PUB. PARTICIPATI
...Sit* . ... Lucdtlon.
SOUTHWEST DIVISION
MCAS EL TORO
11 SOUTHWEST DIVISION
11 MCAS EL TORO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
1 SOUTHWEST DIVISION
00 2C MCAS EL TORO
S
OU 2A
24
TANK 191
26
SOUTHWEST DIVISION
OU1 SOUTHWEST DIVISION
MCAS EL TORO
TANK 19* SOUTHWEST DIVISION
OU 1 MCAS EL TORO
OU 2A
18
24
25
SOUTHWEST DIVISION
MCAS EL TORO
Tla* Administrative Record (AR) liutei includes reference* to documents which cite bibliographical sources.
These bibUogrophJc citations are considered to be part of this AR but may not be cited separately In the Index.
-------
DATE - 09/19/97 '
PAGE • 9
PUBLIC PARTICIPATION DOvAJMENTS- MCAS EL TORO (SORT BY DOCUMENT DATS)
UIC No. DOC. NO.
UolMENT.TYPB. . .
CONTR/CUID. .NO. .
APPROX . 1 . OP . PAGES
M600SO 001848
MISC
000000000000000
OlSo
M60050 001849
MISC
000000000000000
0001
M600SO 001981
MISC
000000000000000
0075
M60050 0018SO
XMTL
N6871192D4670
0056
M60050 001762
XMTL
N6B71192D4670
0004
M600SO 001854
XMTL
N6871192D4670
0030
PRC.DATB
DUC. DATS
CTO.NO. .
EPA. CAT i
03/24/97
12/04/96
00000
10.4
03/24/97
12/04/96
00000
10.1
09/18/97
12/04/9*
00000
10.4
01/24/97
12/12/96
0061B
10.6
03/20/97
01/10/97
0063B
10.2
03/25/97
01/15/97
0061B
10.4
FROM
FROM SIGNATURE
TO
TO SIGNATUVR
MTAS EL TORO
J. JOYCE
BECHTEL NATIONAL INC
B. COLEMAN
MCAS SL TORO
RAB MEMBERS
BECHTEL NATIONAL INC
H. MASRI
VARIOUS AGENCIES
BECHTKL NATIONAL INC
II. MASRI
SOUTHWEST DIVISION
R. aLLUY
BECHTEL NATIONAL INC
D. COWSER
RAB MEMEBERS
. . ; SUBJECT
DECEMBER 4, 1996 RAB MEET I NO PUBLIC INFO. MATERIALS
INCLDSi MTO. AGENDA, DRF MTO. MIN.. MEMBER SIGN-UP
SHEET, FACT SHT.I7, BXBC.SUMRY ON DRPT RI OU JA. ETC.
PUBLIC NOTICES OF DECEMBER 4, 1996 RAB MEETING
IN LOCAL NEWSPAPERS
PUBLIC INFORMATION MATERIALS FOR DECEMBER 4, 1996. RAB
MBBTINO-AOSNDA, HANDOUTS. 4 MINUTES OF SEPTEMBER 25,
199* , REVISED 'BLUB SHEET* FOR 12/4/9* MTO.
.*
SITE (B) BASEWIDE COMMUNITY RELATIONS SUPPORT - FINAL
FACT MIKET NO. 7 (NO. 5 UNDER CLEAN II)
WITH ENCLS.
MARCH 26, 1996. REPLACEMENT PAGES TO FINAL UPDATED
COHKUNirr RELATIONS PLAN
SITES IB) BASEWIbli COMMUNITY RELATIONS SUPPORT- INCLDS .
DRAFT RAB MEETING AGENDA, DRAFT PUBLIC NOTICE OF
1/10/97, DRAFT MEETING MINUTES. SIGN-UP SHEET
CLASSIFICATION
ADMIN RECORD
INFO REPOSITORY
AtMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
AbMIN RECORD
INTO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
RAB
IRP
PUB. PARTICIPATI
PUBNOT
RAB
PUB. PARTICIPATI
PUB. PARTICIPATI
PUBNOT
MTO MINS
RAB
OU
CLEANUP
PUB. PAKTICIPATI
CRP
IRP
PUB. PARTICIPATI
MTO MINS
RAB
PUB. PARTICIPATI
. . .Site. .
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
OU 1A
OU 2B
OU 2C
OU 1
2
17
.18
1
S
4
1
9
10
11
12
13
IS
1C
19
31
21
22
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TUHO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
This Administrative Record (AR) Index Includes references to documents which cite bbliographteal sources.
raDhfccitatxmsvecoru^^
-------
DATE - 09/19/97
PUBLIC PARTICIPATION DOCUMENTS- HCAS EL TORO (SORT BY DOCUMENT DATS)
iO
UIC Ho. DOC. NO.
DOCUMENT . TYPE
CONTR/CUID NO
APPROX . • . OF . PAGES
M600SO 001764
MISC
N6871197D4670
0001
M60050 001813
MISC
000000000000000
0001
M600SO 001756
XMTL
N6871192D4b'>.)
0011
M60050 001645
XMTL
H6I71192D4670
0010
M600SO 001949
MM
000000000000000
0000
H600SO 00192S
PLAN
000000000000000
OOOB
M600SO 001936
MISC
000000000000000
0002
M60050 00X975
MISC
000000000000000
0001
M60U50 001974
MISC
000000000000000
01SO
PRC.DATB
DOC DATE
CTO NO
EPA. CAT*
03/20/97
01/30/97
00000
10.4
03/21/97
01/30/97
00000
10.4
01/20/97
02/OC/97
00071
10.4
03/24/97
03/2C/97
0063u
10.1
06/06/97
03/2(/97
00000
10.4
04/29/97
04/23/97
00000
04.3
OS/28/97
05/14/97
00000
10.6
09/18/97
OS/22/97
00000
10.3
09/18/97
OS/28/97
00000
10.3
FROM
FROM. SIGNATURE
70. . .
TO. SIGNATURE
MCAS EL TORO RAB
B6CHTBL NATIONAL INC
P. BROOKS
VARIOUS AGENCIES
BECHTEL NATIONAL INC
C. CAKLISLB
VARIOUS AGENCIES
BECHTBL NATIONAL INC
D. TEDALDI
SOUTHMEST DIVISION
T. MARTIN
BECKTEL NATIONAL INC
C. CARLISLE
VARIOUS AGENCIES
ORANGE CO. KtOISTER
PUBLIC INTtKEST
ORANGE COUNTY RLOIST
PUBLIC INTEREST
MCAS EL TORO
nAB MEMBERS
SUBJECT
RESTORATION ADVISORY BOARD MEETING
H/0 ENCL (REP. DOC. IUU1813 THRU 001822)
JANUARY 30, 1997. RAB MEETING AGENDA
JANUARY 30. 1991, MERINO MINUTES
6ITBS (B) BASEMIDB COMMUNITY RELATIONSHIPS SUPPORT -
INCLUDESi MARCH 2«, 1997 AQBNDA. PUBLIC NOTICE.
JANUARY 30, 1997 DRFT MTO. M1N. (RAB MAILER IN CONFID)
PUBLIC INFORMATION MATERIALS- MARCH 28, 1997
RAB MERINO
M
PROPOSED PLAN FOR OPERABLE UNIT 2A SITE 24 SOIL
VADOSB ZONE CLEANUP
NEWSPAPER ARTICLE 'PUBLIC TO COMMENT ON BASE CLEANUP*
PUBLIC NOTICE "RAB MEETING FOR MAY 29, 1996*
PUBLIC INFORMATION MATERIALS FOR MAY 28.1997, RAB
MEETING-AGENDA, HANDOUTS 4 DRAFT MEET I NO MINUTES PROM
MARCH 26, 1997 RAB MERINO
CLASSIFICATION
ADMIN RECORD
INTO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
KEY WORDS
RAB
PUB. PARTICIPATI
RAB
PUB. PARTICIPATI
MTO MINS
BCP
CBRCLA
PUB. PARTICIPATI
PUBNOT
RAB
MTO MINS
PUB. PARTICIPATI
PUB. PARTICIPAII
RAB
OU
SOIL
CLEANUP
TECH/GUID DOC.
PUB. PARTICIPATI
PUBNOT
CLEANUP'
COMMENTS
PUB. PARTICIPATI
PUB. PARTICIPATI
PUBNOT
RAB
MTO MINS
PUB. PARTICIPATI
RAB
PUBNOT
MTG MINS
. . .Site. .
3
17
19
4
1
9
10
11
IS
19
20
21
22
25
2A
24
OU 2A
24
OU 2A
OU 1
OU 2B
a
Locdt Ion
SOUTHWEST DIVISION
MCAS EL TukO
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TURO
SOUTHWEST DIVISION
MCAS CL TORO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TOKO
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Thl* Administrative Record (AR) Index Include* references to documents which cite bibliographical nources.
These bibUognpftlc citation* are contiderad to be part of this AR but may not be cited leparajely toll* Index,
-------
DATE - 09/19/97 PAGE -
PUBLIC PARTICIPATION DOCUMENTS- MCAS EL TORO (SORT BY DOCUMENT DATE)
UIC No. DOC.NO. PRC.DATE FROM
KajMENT.Tlii:... DOC.DATS tHOM. SIGNATURE
CONTR/OUID..NO. . CTO.NO. . TO SUBJECT CLASSIFICATION KEY WORDS ...Site Location
APPRO*. I. OF. PACES EPA.CAT! TO.SIGNATURE
M600SO 001974 continued
17
OU 3A
25
' IS
19
to
4
6
I
9
10
11
12
11
IS
16
19
20
21
22
M600SO 001950 06/06/97 BECHTBL NATIONAL INC PROPOSED PLAN MCAS EL TORO NO FURTHER ACTION SITES ADMIN RECORD PUB. PARTICIPATI 4 SOUTHWEST DIVISION
PLAN 06/16/97 D. TEDALDI INFO REPOSITORY NFA ( MCAS EL TORO
000000000000000 00000 SOUTHWEST DIVISION 9
0000 01.6 T. MARTIN 10
11
«. 1S
19
20
21
22
25
M60050 001969 09/18/97 HAHN BOWEKSOCK CORP JULY 31, 1997, PUBLIC COMMENT MEETING PROPOSED PLAN ADMIN RECORD PUB. PARTICIPATI SOUTHWEST DIVISION
MM 07/31/97 J. BURGNER FOR ENVIRONMENTAL RESTORATION NO FURTHER ACTION SITES INFO REPOSITORY PUBNOT MCAS EL TOKO
000000000000000 00000 MCAS EL TORO IRP NFA
0010 10.4 IRP
TECH/GUID DOC.
M600SO
MM
001970
000000000000000
0017
M60050
MISC
001971
000000000000000
0001
09/18/97
07/31/97
00000
10.4
09/16/97
07/31/97
00000
10.6
MCAS EL TORO
MEMBERS
ORANGE COUNTY REGIST
PUBLIC INTEREST
JULY 11, 1997, PUBLIC COMMENT MEETING NO FURTHER
ACTION SITES HANDOUTS INCLUDES,
MEETING EVALUATION, AND SIGN-UP
PUBLIC NOTICE 'PRESENTATION AND
DATED JULY 31, 1997
PUBLIC COMMENT FORMS,
SHEETS
DISCUSSION MEETING"
ADMIN RECORD
INFO REPOSITORY
ADMIN RECORD
INFO REPOSITORY
PUB. PARTICIPATI
TECH/GUID DOC.
COMMENTS
NFA
PUB. PARTICIPATI
NFA
PUBNOT
SOUTHWEST DIVISION
MCAS EL TORO
SOUTHWEST DIVISION
MCAS EL TORO
Thl* Administrative Record (AR) Index Includes reference* to document* which cite bibliographical source*.
These bibik>o/aphk:c4*Uofls are om be part tft^
-------
DATS - 09/19/97
PUM.ii PARTICIPATION DOCUMENTS- MCAS EL TOKO (SORT BY DOCUMENT DATS)
PAGE - U
UIC No. DOC. NO.
DOCUMENT. TYPE. . .
CONTR/GUID. .NO. .
APPROX . 1 . u t' . PACES
M60050 001972
MISC
000000000000000
0002
M60050 001979
MISC
OOOOOOOOOuuOUOO
0004
M600SO 001973
MISC
OOOOOOOOOOuuOOO
0133
MCOOSO 001»7t
MISC
N6S71192D4670
0015
PRC.DATB FROM
DOC. DATE HtuM. SIGNATURE
BPA.CATI TO.SICNAiURB
09/18/97 IRVINE WORLD NEWS NEWSPAPER ARTICLE 'MARINES INVITE PUBLIC TO ASK. ADMIN RECORD
07/31/97 COMMUO' ABOUT CLEANUP OF GROUND CONTAMINATION* INFO REPOSITORY
00000 PUBLIC INTEREST
10.6
09/11/97 MCAS EL TORO FAXED COPIES OF VARIOUS NEWS CLIPPINGS! PUBLIC ADMIN RECORD
07/31/97 CO NOTICE DATED JULY 31, 1997 PRESENTATION 4 DISCUSSION INFO REPOSITORY
00000 BECHTEL NATIONAL INC MTO., IMP PROPC-UJ PLAN OU 2A-SITE 24.NKA , OU 3A
10.3 B. COLEMAN
09/11/97 MCAS BL TORO PUBLIC INFORMATION MATEllIALS FOR AUGUST S, 1997. RAB AMIN RECORD
01/06/97 MEETING-AGENDA, HANDOUTS 4 DRAFT MEETING MINUTES FROM INFO REPOSITORY
00000 RAB MEMBERS MAY 21, 1997 RAB MEETING
10.3
0»/l»/»7 BECHTEL NATIONAL INC SIT! (B) BASEWIDB COMMUNITY RELATIONS SUPPORT- HAS ADMIN RECORD
0»/24/97 D. TLDALDI MTINO MAILER-RAB MTINO AGENDA i PUBLIC NOTICE 9/24/97 INFO REPOSITORY
OOCJtt VARIOUS AGENCIES RAB MTO. Mil.. 1/6/97 RAB MTO. (MAILER IN CONFIDTL PILE)
10.4
KEY WORDS
PUB. PARTICIPATI
COMMENTS
CLEANUP
PUBNOT
PUB. PARTICIPATI
TECH/GUID DOC.
OU
NFA
PUB. PARTICIPATI
PUBNOT
RAB
MTO MINS
CRP
RAB
MTG MINS
TECH/GUID DOC.
PUB. PARTICIPATI
. ..Site.
25
OU 2A
24
OU 3A
25
OU 3A
24
OU 2A
4
6
1
9
10
11
12
13
15
19
20
31
22
24
OU 3A
OU 3
OU 3A
25
4
6
.9
10
13
15
19
20
21
22
25
Location
SOUTHWEST DIVISION
MCAS KL TOKO
SOUTHWEST DIVISION
MCAS BL TORO
SOUTHWEST DIVISION
MCAS BL TORO
•'
SOUTHWEST DIVISION
MCAB BL TORO
Thi» Administrative Record (AR) Index Includes references to document* which cite bibliographical sources.
ttbllograpnlc citation* are considered to be part of this AR but may not be cited separately In the Index.
-------
TO. . RECORDS PRINTED. »S
REPORT SPECIFICATION FOR. RPT443
TITLE. PUBLIC PARTICIPATION DOCUHENTS- MCAS EL TORO (SORT BY DOCIMEMT D
FILEi OOMbiUtO Kay Info. ».U> Activity Pile
SELECTION CRITERIA:
(01) Key W..rda CONTAINS 'PUB. PARTICIPATE
k Key HoiJa CONTAINS ALL 'PUB. PARTICIPATI1 fc UIC.Ho. IS •M60050 •
SORT CRITERIA:
01 DOC. lute
PAGE BREAK LEVEL:
00 NO PAGEBREAK
TYPE REPORT FORM
PAPER COMBO KEY IMfO(«Mt«r activity «pt fora)
This Administrative Record (AR) Index Include* references to documents which cite bibliographical sources.
These bibliographic citations are considered to be part of this AR but may not be cited separately in the Index.
-------
RELEVANT GUIDANCE DOCUMENTS
-------
DATB • 09/11/97
khLBVANT OUIDANCS DOCUMSNT8-OU2A, SIT! 34, SOIL CLEANUP. MCAS EL TOKO
PAGE - J
DOCUMENT. TYPE DOC DATS
CONTR/GUID. .NO. . CTO.NO..
API k. 'X.I. OF. PAGES EPA. CAT!
OOMPDM 000001 09/16/94
UUIU
E 1527
0001
LUMPDM 000002 11/17/94
CUIO
E 1521-*!
0011
COMPIJH 000020 11/21/94
CUID
TITLE 22
0000
COMPW4 000021 11/21/94
CUID
000000000000000
0000
COMPDN 000022 11/31/94
QUID
OOOOOvOuuOOOOOO
0000
COHPOH 00002J 11/21/94
CUID
000000000000000
0000
COMPDM 000029 11/21/94
CUID
NIOSH iS-115
0000
COHPDM 000030 11/21/94
CUID
29 CPU 1926. 6S
0000
COMPDM 000033 11/21/94
cum
OOCiuUOOOOOOOOOO
0000
COMPDM 000034 11/21/94
CUID
is era
0000
PROM. SIGNATURE
TO SUBJECT
TO. SIGNATURE
AMERCIAN SOCIETY STANDARD PRACTICE POR ENVIRONMENTAL SITE ASSESSMENTS I
PHASE I ENVIRONMENTAL SITE ASSESSMENT PROCESS
AMERICAN SOCIETY STANuANO PRACTICE FOR ENVIRONMENTAL SITS ASSESSMENTS)
TRANSACTION SCREEN PROCESS
CALIFORNIA .OP RBOUALTIONS (22 CPRI CHAPTER 14,
ARTICLE 7 lllLfc 22
•*
SARA SECTION 211, CHAPTER 160, PARAGRAPH 2705C
CALIFORNIA CODS OP REGULATIONS, TITLE 22, (22 CPR)
DIVISION 4.5
RESOURCE CONSERVATION AND RECOVERY ACT IRCRA)
AND HAIAROUS AND SOLID MASTS AMENDMENTS OF 19t4
NIOSH OCCUPATIONAL SAFETY AND HEALTH GUIDANCE MANUAL FOR
HAZARDOUS HASTE SITS ACTIVITIES
USDOL/OSHA CODS OP FEDERAL RECUALTIONS TITLE 29, PART 1926.65
STATS OF CALIFORNIA HEALTH AND SAFETY CODS SECTION
4 1*05. S
IS CPU PART 930 SECTION 930. 33 (b)
This Administrative R«uxd (AR) Index htdudet rafkranoM to document*
The«« b&OoanfihJc dUttona an* constterad to be pert of this AR but mm
CLASSIFICATION
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
which die MiNograpf
'AottadtedteMnti
KBY WORDS
GUID
TECH/OUID DOC.
TECH/OUID DOC.
GUID
TECH/OUID DOC.
GUID
TECH/CUID DOC.
QUID
TECH/OUID DOC.
QUID
RCRA
HSMA
TSCH/OUID DOC.
CUID
HAZ NASTB
TECH/OUID DOC.
QUID
CFR
TSCH/OUID DOC.
QUID
TECH/OUID DOC.
CFR
TBCH/CUID DOC.
iteeleoufce*.
HV to the Index.
SOUTHWEST DIVISION
SALTON SEA
1,2,3,4,5 SOUTHWEST DIVISION
C, 7,1,9,10 SALTON SEA
11,12,13,
14.15,14
17, !»,!»,
20,21,22
33,24,35
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
HASNI SAN DIEGO
SOUTHWEST DIVltlUN
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHHBST DIVISION
SOUTHWEST DIVISION
-------
DATS - 09/16/97
RELEVANT OUIDANCB DOCUMENTS-OU3A. SITS 24, bOtL CLEANUP. HCA3 BL TORO
PAGE -
DOUmi.NT.TYPB. . .
CONTR/GUID. .NO. .
APPROX.I. OF. PAGES
COMPDM 000035
GUI!'
40 C'FR
OOUO
COMTLM 000036
QUID
40 CFR
0000
COMPDM 000055
GUID
000000000000000
0001
COHPDM UU0079
CUID
CONF 6710756
0013
COMPDM 000133
CUID
BPA 540/067/001
oooo
COMPDM 000277
CUID
OOOOUbuOOOOOOUu
0000
COMPOM 000027
CUID
PL 95-510
0000
COMPDM 000169
CUID
000000000000000
0250
COMPDM 000326
GUID
0200
COMPDM 000101
CUID
000000000000000
0000
DOC. DATE FROM. SIGNATURE
CTO.NO. . TO
EPA.CATI TO. SIGNATURE
11/26/94
11/26/94
11/26/94
11/26/94
12/15/94 BPA
12/27/94
11/21/94
01/01/HO
12/22/94
01/01/60
04/15/95 US GEOLOOIAL SURVEY
01/01/64
12/01/94 EPA
04/01/65
SUBJECT CLASSIFICATION
40 CFR SECTION 146.4 COMPENDIUM
*
40 CFR SECTION 1)1.12 COMPENDIUM
V01 NCP MBOUlkLHKNTS FOR ARAR'S COMPENDIUM
IMPLEMENTATION OP TUB SUPBRPUND AMENDMENTS AND COMPENDIUM
RCAUTHORIZATION ACT
DATA QUALITY OBJECTIVES FOR REMEDIAL RESPONSE COMPENDIUM
ACTIVITIES 2 PARTS VOL. li DEVELOPMENT PROCESS IK PA
S40/OSJ/001J VuL. 2 EXAMPLE SCENARIO (EPA 540/067/004)
CALIFORNIA CODE OP REGULATIONS, TITLE 2), DIVISION 1 COMPENDIUM
CHAPTER IS (DISCHARGES PO WASTE TO LAND) ARTICLE 2,
ARTICLE S, ARTICLE 6
(XHfREHENSIVS ENVIRONMENTAL RESPONSE, COMPENSATION, COMPENDIUM
AND LIABILITY ACT OF 1960
BPA NATIONAL OIL AND HAZARDOUS SUBSTANTI S POLLUTION COMPENDIUM
CONTINGENCY PLAN UNDER THE CERCLA OP 1960
ELEMENT CONCENTRATIONS IN SOILS AND OTHER SURPICIAL COMPENDIUM
MATERIALS OF THE CONTERMINOUS UNITED STATES US
GEOLOGICAL SURVEY PROFESSIONAL PAPER 1270
LABORATORY DATA VALIDATION • PUNCTPIONAL GUIDBLINOES COMPENDIUM
FOR EVALUATING OROAMC8 ANALYSIS
KEY HORDS
era
TBCH/GUID DOC.
CPR
TECH/QUID DOC.
GUID
TBCH/GUID DOC.
CUID
TECH/GUID DOC.
QUID
TBCH/GUID DOC.
TECH/QUID DOC.
GUID
TBCH/GUID DOC.
GUID
TBCH/GUID DOC.
TBCH/GUID DOC.
CUID
TBCH/GUID DOC.
...Sit* Location
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
NAP BL CENTRO
SOUTHWEST DIVISION
NAP BL CENTRO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
i
EALTON SEA
SOUTHWEST DIVISION
grapMcalbourcM.
-------
DATB - 09/16/97
RELEVANT GUIDANCE OOCUMBNTS-OU2A. SIT! 24. SOIL CLEANUP, MCAS EL TOKO
DOCUMENT TYPE. . .
CWTR/GUID. .MO. .
APPROX . 1 . OF . PACES
CONPDM 000108
QUID
NEESA 20.2-047B
0000
COMPDH 00014S
GUIO
NEBSA 20.2-047
0071
CONPOH 000102
CUID
000000000000000
0000
COMPOH 000)«<
QUID
000000000000000
ooso
CONPOM 000251
HISC
P. L. 94-510
0)00
CUMFL* 000011
QUID
EPA &40O67003
0330
COMIOJH 000366
CUID
PB90
-------
DAT* • 09/H/J7
RELEVANT GUIDANCE DOCUMENTS-OU2A. SITE 24. SOIL CLBNIUP, MCAS EL TORO
PAOS • 4
DOCUMENT. TYPE. . .
COKTR/GUID. .HO..
/ H BOX. 1. OF. CAGES
CCHfLM 000259
MISC
000)
COMPDM 00010*
GUID
EPA 540 P»70001
0400
COMPDM 000131
GUID
NEESA 20.2-047B
0000
COMPDM 0003)8
GUID
000000000000000
0000
COMPDM 00021C
CUIO
OOOOOOOOOOUUOOO
0000
COMPCN 000240
RPT
BPAS40/1-M/001
0147
COMPDM 0001J4
CUID
0000
COMPCM 000141
QUID
NEASSA 202047B
0000
COMPDM OOOJbl
GUID
000000000000000
0014
COMPCM 00021S
QUID
0000000000001)00
0000
DOC. DATS
CTO.MO. .
l.rA.i'nri
09/23/96
01/01/87
12/01/94
12/01/17
12/15/94
01/01/11
12/23/94
01/01/11
12/22/94
Oit/ul/d*
09/21/91
04/01/11
12/15/94
OS/01/11
12/15/94
Oi/01/tl
04/04/96
06/2J/M
12/22/94
07/01/11
FROM.81GNATU18
TO SUUJKCT CLASSIFICATION
TO.8IOMATURB
JACOBS tNOINEERIIU STANDARD OPERMINO PROCEDURB SOIL OAS SAHPLINO COMPENDIUM
VOL. Ill, SECi 44
EPA MASHINOTON A COMPENDIUM OP SUPBRPUND FIELD OPERATIONS METHODS COMPENDIUM
(PBM1I15S7I
NECSA PORT HUENEMB SAMPLING AND CHEMICAL ANALYSIS QUALITY ASSURANCE COMPENDIUM
RtOUlRtMtWTS FOR THB NAVY IRP REVISED AUGUST.
NEBSA PORT HUENEMB SAMPLING AND CHEMICAL ANALYSIS QUALITY ASSURANCE COMPENDIUM
REQUIREMENTS FOR THB NAVY INSTALLATION RESTORATION
PROGRAM
BPA LABORATORY DATA VALIDATION FUNCTIONAL GUIDELINES FOR COMPENDIUM
EVALUATING ORGANIC ANALYSIS
IPA-OSMER SUPERFUND EXPOSURE ASSESSMENT MANUAL COMPENDIUM
UFIOSNBR DIRECTIVE 9215.5-1
'•ATI, INC. LABORATORY QUALITY ASSURANCB MANUAL COMPENDIUM
NEESA FORT HUENEKB SAMPLING AND CHEMICAL ANALYSIS QUALITY ASSURANCE COMPENDIUM
REQUIREMENTS FOR THB INSTALLATION RESTORATION PROGRAM
CINPACFLT DEPARTMENT OF THE NAVY CERCLA/SARA/IK REQUIREMENTS COMPENDIUM
AND PROCEDURES
EPA LABORATORY DATA VALIDATION FUNCTIONAL GUIDELINES FOR COMPENDIUM
EVALUATING INORGANIC ANALYSIS
RBY WORDS
SOP
TBCH/GUID DOC.
GUID
TECM/GUID DOC.
OA
IRP
TBCH/GUID DOC.
QA
TECH/OVID DOC.
DATA
TECH/GUID DOC.
EXPOSURE
ON
HAZ HASTE
TECH/GUID DOC.
OA
T6CH/OUID DOC.
OA
TECH/GUID DOC.
CERCLA
GUID
TBCH/GUID DOC.
DATA
TECH/OUID DOC.
SOUTHWEST DIVISION
SOUTHMEST DIVISION
SOUniNEST DIVISION
NAP EL CENTRO •
SOUTHMEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
NAP EL CENTHO
SOUTHWEST DIVISION
NAP EL CENTRO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
thto Acmlnljtratfvt Rtoord (AR) Indtx IndudM raferenoM to document* which eft* bfcflogmpftlcal MuroM.
Vk.«. kBkllAMm»hlM «M*MAM* AM fwimMmrmit In K* nmit fA tMm AD hiift m«w tw* K* rbmA mmnnrmtmttt in lh« bw4*w
-------
DAT! - 09/11/97
PAGE
RELEVANT GUIDANCE DOCUMCNT8-OU2A, SITB 24, SOIL CLEANUP, MCAS IL TORO
DOCUMENT. TYPE. . .
CONTR/CUID. .NO. .
APPROX . 1 . OP . PACES
COMPOM 000175
CUID
FD89-184626
0100
COMPUM 000201
QUID
PB091I462C
02SO
D MMJM 000211
CUID
000000000000000
0000
COMPDM 000274
CUID
000000000000000
0000
COMPDM 000211
CUID
924S.70IA
OIlOO
COMIUM 000127
GUI!)
000000000000000
0000
COMPDM 000069
CUIO
El'A 540119001
01SO
(XMcuM 000200
CUID
EPA S4UK9001
0050
COMPDM 000100
CUID
000000000000000
0000
COMPDM 0002S7
RPT
PBI9-HS184
0017
DOC. D ATI PROM. SIGNATURE
CTO.HO. . TO
EPA. CAT! TO. SIGNATURE
12/22/94 EPA MASH1NOTON
10/01/18
12/IU/94 EPA WASHINGTON DC
10/01/61
12/22/94 IPA
01/01/1)
12/27/94 USEPA
01/01/19
09/20/»k EPA - OSHBR
01/07/1}
12/01/94 EPA
02/01/1*
11/21/94 EPA X ASH 1 NOTCH
03/01/89
12/22/94 EPA WASHINGTON DC
01/01/19
12/01/94 DOM
05/01/l»
09/21/9C EPA-ORD
06/01/89
bUBJECT
GUIDANCE FOR CONDUCT I IU REMEDIAL INVESTIGATIONS AND
FEASIBILITY STUDIES UNDER CERCLA. INTERIM FINAL,
OFFICE OF EMERGENCY AND REMEDIAL RESPONSE
GUIDANCE IUR CONDUCTION REMEDIAL INVESTIGATIONS AND
FEASIBILITY STUDIES UNDER CERCLA
EPA RISK ASSESSMENT GUIDANCE FOR tiUPERFUND (RAGS) .
VOLUME I HUMAN HEALTHC EAP/S40/1-89/002
OSMER DIRECTIVE NO. 9200.S-102
RISK ASSESSMENT GUIDANCE FOR SUPERFUND
HUMAN HEALTH EVALUATION MANUAL PART A
INTERIM FINAL PRB-PUBLICATION COPY
METHODS FOR BVALUATIN . THE ATTAINMENT OF CLEANUP
STANDARDS OFFICE OF KiLICY. PtANNINO AND EVALUATION
FEBRUARY. 1989 (•»
RISK ASSESSMENT GUIDANCE FOR SUPERFUND VOLUME IIIAL
ENVIRONMENTAL t VALUATION MANUAL INTERIM FINAL
RISK ASSESSMENT GUIDANCE FOR SUPERFUND VOLUME II
ENVIRONMENTAL EVALUATION MANUAL INTERIM FINAL
NAVY INSTALLATION RESTORATION (IR) MANUAL
STATE OF TECHNOLOGY REVIEW SOIL VAPOR EXTRACTION
SYSTEMS
EPA/COO/2-19/024
, CLASSIFICATION
COMPENDIUM
COMPENDIUM
COMPENDIUM
ADMIN RECORD
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
KEY WORDS
GUIO
CERCLA
TECH/GUID DOC.
CUID
RI
TECH/0010 DOC.
RA
TBCH/OUID DOC.
TECH/GUID DOC.
RISK
HA
RI
F8
TSCH/OU1D DOC.
CUID
TCCH/CUID DOC.
GUID
RA
TECH/GUID DOC.
GUID
TECH/GUID DOC.
GUID
IRP
TECH/GUID DOC.
SVEI
TCCH/CUID DOC.
SOUDiHKST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
NAP EL CENTKO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
NASNI SAN DIEGO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
This AdmlnliIriOvt Rtoord (AR) Index Includes references to documents which eKe bibliographical sources.
These bfctogrsphlc citations are conskjend to be part of tnJe AR but may not be died separately to !ne Index.
-------
DAT* - 09/18/97
RELEVANT OUtDMICB DOCUMM4TS-OU3A. SITS 24. SOIL CLEANUP, MCAS EL TWO
VMS
UIC No. DOC. HO.
DOCUMENT. TYPE. . .
CONTM/GUID. .HO..
COMPDM 00011*
OHIO
9355302
0250
rtfiroM 000194
CUID
LI A 540089007
0150
COMPDM 000377
CUID
000000000000000
0350
COMPDM 000221
CUID
EPA 540 0-89009
0150
CU4PDM 000338
CUID
EPA540O89009
IUOO
COMPDM 000382
GUID
PB»0 148(1
0400
COMPDM 000138
1..IJD
90A038*
0000
COMPDM 000185
CUID
9234202FS
0002
COMPDM 000182
C'.MD
D1H 9lJbJ02FS2
0003
COMPDM 000352
GUID
BPA 540189002
0300
PRC.DATB FROM..
DOC. DATS FROM. SIGNATURE
CTO.NO.. TO
! EPA.CATI TO. SIGNATURE
08/18/95 EPA WASHINGTON, U.C.
06/01/8*
12/22/94 EPA WASHINGTON DC
07/01/8*
04/05/9* BPA WASHINGTON
07/01/8*
12/22/94 EPA
08/01/8*
11/30/95 BPA WASHINGTON DC
08/01/8*
04/05/JI BPA WASHINGTON
08/01/1*
12/15/94 BPA
09/01/89
12/22/14 BPA
09/01/8*
12/22/94 BPA
11/01/8*
01/10/9* BPA WASHINGTON DC
12/01/8*
SUBJECT CLASSIFICATION
INTERIM FINAL GUIDANCE ON PREPARING SUPERFUND DECISION COMPENDIUM
DOCUMENTS THE PROPOSED PLAN THE ROD EXPLANATION OF
SIGNIFICANT UU1ERENCES THE ROD AMENDMENT
GUIDANCE ON PREPARING SUPERFUND DECISION I THE PROPOSED COMPENDIUM
PLAN THE RECORD OF DECISION EXPLANATION OF SIGNIFICANT
DIFFERENCES THE ROD AMENDMENT INTERIM FINAL
GUIDANCE ON PREPARING SUPERFUND DECISION DOCUMENTS t COMPENDIUM
TUB PROPOSED PLAN THE RECtiHD OF DECISION EXPLANTIONS
OF SIGNIFICANT DIFFERENCE THB ROD AMENDMENT
CERCLA COMPLICANCE WITH OTHER LAWS MANUAL i PART II COMPENDIUM
CLEAN AIR ACT AND OTHER ENVIRONMENTAL STATUTES 4 STATE
kLwUIREMENTS
CERCLA COMPLICANCB WITH OTHER LANS MANUAL. PART II COMPENDIUM
CLEAN AIR ACT AND OTHER ENVIRONMENTAL STATUES AND
STATE REQUIREMENTS
CERCLA COMPLIANCE WITH OTHER LANS MANUAL I PART II COMPENDIUM
CLEAN AIR ACT AND OTHER ENVIRONMENTAL STATUTES AND
STATE REQUIREMENTS
GUIDANCE FOR PREPARING QUALITY ASSURANCE PROJECT PLANS COMPENDIUM
FOR SUFERPUND REMEDIAL PROJECTS (REGION 9)
GUIDE TO MANUAL CERCLA COMPLICANCE WITH OTHER LAWS COMPENDIUM
MANUAL
A GUIDE TO DEVELOPING SUPERFUND PROPOSED PLANS COMPENDIUM
RISK ASSESSMENT GUIDANCE FOR SUPERFUND VOLUME I HUMAN COMPENDIUM
HEALTH EVALUATION MANUAL (PART Al INTERIM FINAL
KEY WORDS
ROD
IbCH/GUID DOC.
ROD
TECH/GUID DOC.
QUID
TBCH/OUID DOC.
QUID
CERCLA
TECH/GUID DOC.
CERCLA
CAA
TBCH/OUID DOC.
CBRCLA
TECH/GUID DOC.
OA
TECH/GUID DOC.
GUID
TECH/GUID DOC.
QUID
TECH/GUID DOC.
GUID
TECH/GUID DOC.
...Sit*..* ... Location «
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
NAP EL CENTRO
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
Thta Administrative Record (AR) Index Include* references to document* which die bbflogaphlcal lourm.
The*e WbUoflrapWc citations ere considered to be part of Into AR but mey not be cited leperatejy In the Index.
-------
DAT* - 09/11/97
RELEVANT OUIDMKB DOCUMKNTS-OU2A, 8ITB 94, $011. CUANUP, MCAS Kb TORO
PAGE -
DOCUMENT. TYPE. ..
CONTR/C01D. .NO..
AU'KKA.I. OP. PACES
COMl'DH 000317
QUID
OOUUUOOOOOOOOOO
0000
COHPDN 000041
GUID
92aS.7-0'jKS
0001
COMPDM 0002(4
MISC
9119.0-01PS
0003
COMPOM 000220
GUID
OOuuOOOOOOOOOOO
02UU
COMPDM 000141
outo
000000000000000
0090
COMKU4 000122
cuto
OSHBR »2IS.701
0200
COUPON 000144
GUID
TITLE 22
0650
COMPDN 000261
NISC
9JJS.1-02FS-2
0001
COMPDM 000442
GUID
0011
COMPLM 000288
GUID
5090.1 A
04 SO
DOC. DATE PROM.SlGNArURE
CTO.NO. . TO
EPA. CAT! TO. SIGNATURE
12/22/94 EPA
01/01/90
09/20/96 BPA-OSHSR
01/09/90
09/31/96 8PA- OSNER
02/01/90
12/22/94 BPA
01/OI/SIU
12/06/95
oi/OH/yo
OUID
11.3
05/1S/9S
04/U1/90
12/06/95 STATS OF CALIFORNIA
04/01/90
00000
11.3
09/21/96 EPA OJ.WER
OS/01/90
04/24/97 PHS SANTA ANA
10/01/90
01/04/95 U..W
10/02/90
SUBJECT
CONTRACT LABORATORY rKOGRAM STATEMENT OP MONK POR
ORGANIC ANALYSES
GUIDANCE POR DATA USEABILITY IN RISK ASSESSMENT
THE FINAL NATIONAL CONTINGENCY PLANi NEW DIRECTIONS
POR SUPERPUND
QUICK REFERENCE FACT SHEET
40 CFR PART 300 NATIONAL OIL * HAZARDOUS SUBSTANCES
POLLUTION COKllNUENCY PLAN, FINAL RULE PART II tPA
NATIONAL OIL HAZARDOUS SUBSTANCES POLLUTION
CONTINGENCY PLAN U.S. CODE OP FEDERAL REGULATIONS
40 CFR PART JUO
RISK ASSESSMENT GUIDANCE POR 6UPERFUND VOLUME I
HUMAN HEALTH EVALUTATION MANUAL PART A
TITLE 22, DIVISION 4.5 ENVIRONMENTAL HEALTH STANDARDS
POR THE MANAGEMENT OF HAZARDOUS WASTE
A GUIDE TO DEVEI"PING SUPERPUND PROPOSED PLANS
QUICK REFERENCE >ACT SHEET
GUIDELINES FOR SITE INVESTIGATIONS AND MITIGATION
ENVIRONMENTAL AND NATURAL RESOURCE PROGRAM MANUAL
OPNAV1NST 5090. 1A
CLASSIFICATION
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
ADMIN RECORD
COMPENDIUM
KEY WORDS
TECH/GUID l/OC.
DATA
RISK
TECH/OUID DOC.
NCP
HAS WASTE
TECH/GUID DOC.
GUID
TECH/OUID DOC.
OUID
TECH/GUID DOC.
TBCH/GUID DOC.
OUID
TBCH/GUID DOC.
GUID
CERCLA
TECH/GUID DOC.
GUID
61
TECH/GUID DOC.
GUID
TECH/GUID DOC.
...Sit* Local!
SOUTHWEST
SOUTHWEST
SOUTHWEST
SOUTHWEST
SOUTHWEST
[on
DIVISION
DIVISION
DIVISION
DIVISION
DIVISION
8ALTON SEA
SOUTHWEST
SOUTHWEST
SOUTHWEST
SOUTHWEST
DIVISION
DIVISION
DIVISION
DIVISION
This Administrative FUconJ (AR) Index Include* refotoncet to documents which die Monographic*! touroas.
TtoMbfcaoMTaphtecftatkxwartcontktortdtobeparttf
-------
DATB • 09/U/97
RELEVANT GUIDANCE DOCUMBNTS-OU2A, «« 24, SOIL CLEANUP. MCAS H, TORO
PAOS
DOCUMKNT.TYI'K. ..
CONTR/GUID. .NO. .
APPROX.I. OF. PAGES
COMPDM 00015J
GUID
930050081
0001
COMPOM 000154
GUID
9200500IK
0001
COHPDN 0001SS
KPT
9200SOOID
OU01
CDMPDM 000156
OUID
9200S008C
0001
COMPDM 000157
RPT
92005008B
0001
COMPDM 000120
QUID
OSHER 9I333A1
0400
COMPDM 0001 95
GUID
DIR 9200111
ooas
COMPDM 000066
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BPA540P91002
0150
COMPDM 000219
GUID
S090.1A
0100
COMPDM 000149
GUID
93SS302PS1
0006
DOC. DATS
CTO.NO. .
EPA.CATI
12/1S/94
11/01/90
12/15/94
11/01/90
12/15/94
11/01/90
12/15/94
11/01/90
12/15/94
11/01/90
12/01/94
12/03/90
12/22/94
12/27/90
lV/2«/94
01/01/91
12/22/94
01/17/91
12/15/94
04/01/91
FROM. SIGNATURE
TO SUBJECT
TO. SIGNATURE
EPA SUPERFUND BLUEPRINT
EPA SUPERFUND TECHNOLOGY
BPA SUPERFUND i FACT v«. FICTION
BPA TUB SUPERFUND CUANUP PROCESS
BPA HISTORY OF SUPERFUND
tPA HASHINOTOH FINAL GUIDANCE ON ADMINISTRATIVE RECORDS FOR
SELECTING CERCLA RESPONSE ACTIONS
EPA WASHINGTON DC FINAL POLICY ON SETTING RI/PS PRIORITIES
BPA WASHINGTON USER'S GUIDE TO TUB CONTRACT LABORATORY PROGRAM
COMNAVBASB COMNAVBASESANDIBOO REGIONAL OIL ft HAZARDOUS SUBSTANCE
POLLUTION CONTlNOtNCY PLAN
BPA GUIDE TO DEVELOPING SUPBRFUKD NO ACTION. INTERIM
At-TION AND CONTINGENCY REMEDY ROD*
CLASSIFICATION
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
KEY MOODS
CUIO
TECH/GUID DOC.
GUID
TECH/GUID DOC.
QUID
TECH/OUID DOC.
GUID
TECH/OUID DOC.
QUID
TECH/GUID DOC.
GUID
CERCLA
TECH/OUID DOC.
QUID
TECH/QUID DOC.
QUID
TBCH/CUID DOC.
CUID
TBCH/CUID DOC.
QUID
ROD
TECH/GUID DOC.
SOUTHNEST Ul VISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
Thli Administrative Record (AR) Index Includes references to documents wttlch die bbflograpMckl source*.
-------
DATB • 09/11/97
RELEVANT. OUIDAHCB DOCUMENT8-OU3A, BITS 24, SOIL CLEANUP, MCAS EL TOKO
PAGE
DOCUMENT. TY Mi...
CONTR/GU1D. .HO..
APPROX.I. OF. PACES
COMI'UM 000420
MEMO
OOl.JOOOOOOOOOOO
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COMI'DH 000072
OU1D
OERR 934S.3-02.
0000
COMPOM 000121
QUID
000000000000000
0002
COMPDM 000199
GUID
EPA S40R92003
ooei
COMPDM 000354
GUID
EPA S40R92004
0075
COMPDM 000166
GUID
EPA 540R92009
0250
COMPDM 00024*
PLAN
9200.2-14
0500
COMPDM 000041
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9285.7-06FS
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COMPDM 000125
MISC
9230.0-05FSB
OOOC
UUC.DATB
CTO.NO..
EPA. CAT 1
12/21/9C
04/16/91
11/21/94
05/01/91
12/22/94
10/25/91
12/22/94
13/01/91
01/10/96
12/01/91
13/22/94
01/01/92
09/23/91
01/01/92
09/20/9S
01/07/93
09/20/9$
01/09/92
UMl.SIONATURg
TO SUBJECT ,
TO.SIUNAIURB
EPA-OERW LDR APPLICABILITY FOR INVESTIGATIVE DKklVtO HASTE
U.S. EPA OFFICE OF EMERGENCY AND REMEDIAL RESPONSE IOGRR)
DIRECTIVE 9J45.3-02 MANAGEMENT OF INVESTIOATION-
DBRIVBD MASTBS DURINO SITE INSPECTIONS
NOAA HABITAT PROTECTION POLICY (ADOPTED JUNB *. 1978)
EPA WASHINGTON DC RISK ASSESSMENT GUIDANCE FOR SUPERFUNDi VOLUME I
HUMAN HEALTH EVALUATION MANUAL (PART B, DEVELOPMENT
OF RISK-BASED PRBLIHINAY REMEDIATION GOALS) INTERIM
EPA WASHINGTON DC Ri-'.K ASSESSMENT OUDIANCE FOR SUPERFUKDi VOLUME I
HUMAN HEALTH EVALUATION MANUAL (PART C. RISK
EVAUJA1IUN OF REMCUIAL ALTERNATIVES) INTERIM
EPA MASHINOTON DC COMMUNITY REALTIONS IN SUPERFUNDi A HANDBOOK
PBH-KJ341
BPA-OERR NATIONAL OIL AND HAZARDOUS SUBSTANCES POLLUTION
CONTROL PUN (THE NCP) NITH 1988 AND 1990 PREAMBLES
EPA-OSMER UNDERSTANDING SUPERFUND RISK ASSESSMENT
EPA- OSNER SUPERFUND FACT SHEET t EXPOSURE PATHWAYS
QUICK REFERENCE FACT SHEET
, CLASSIFICATION
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
KEY WORDS
INVESTIGATION
TECH/GUID DOC.
QUID
TECH/GUID DOC.
GUID
TECH/GUID DOC.
GUID
TECH/QUID DOC.
GUID
TECH/GUID DOC.
QUID
TECH/GUID DOC.
NCP
HAZ WASTE
RSB
SI
RA
RI
F9
TECH/GUID DOC.
RISK
EXPOSURE
TECH/CUID DOC.
HAZMAT
EXPOSURE
TECH/CUID DOC.
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
Thi» AdmlnWrtuv* Record (AR) Indw Indudn rafaranon to documents which cite bMtop/BpNc*! MUICM.
v. kiwu^—ki- .B.U>.. .M *«.«M»«M< «A km nmit «f IM> AR hul ItlMV net hft C
-------
UATB - 09/U/97
RELEVANT OUIDMICB DOCUMENTS-CV2A. tin 24, SOIL CLEANUP, MCAS IL TORO
I*
DOCUMENT. TYPE. . .
COKTD/CUID. NO. .
APPROX . 1 . Or . PAGES
COHPDM 0001 IS
MISC
9210.0-05FSH
000)
COMPDM 000147
MISC
9330.0-OSPSK
0004
COMPOM 0001 IS
MISC
920). 1-021
0001
COMPDM 000019
CUID
OOOOObUOOOOOOOO
0000
COMPDM 0000)1
GUID
5090.2
oooo
COMPDM 000441
UU1D
ooto
COHPPM 0002CS
CUlu
9J8S.7-09FS
0008
COMPDM 000172
CUID
000000000000000
ouot
COMPDM 000210
MISC
9230.0-OSPSf
0004
COMPDM 000)1)
CUID
000000000000000
0200
DOC. DATE FROM. SIGNATURE......
CTO.NO.. TO
EPA.CATI TO. SIGNATURE
09/20/96 EPA - OSMER
01/09/92
09/20/9* EPA -OSMER
01/09/93
09/20/9* BPA-OSNBR
01/ll/»2
11/21/94
02/01/92
11/21/94 DEPARTMENT Of NAVY
02/01/92
04/24/97 STATB OF CALIFORNIA
03/01/92
09/2)/9< EPA-OHSER
06/01/92
12/22/94 EPA
07/01/92
09/2)/9C EPA-OSMBR
09/01/92
05/12/95 EPA SAN FRANCISCO
10/01/92
SUBJECT
SUPERFUND FACT SHEET i AN OVER VI EH •
QUICK REFERENCE FACT SHEET
SUPERPUND FACT SHEET > IDENTIFYING SITES
QUICK REFERENCE PACT KllkkT
THE EUPERFUND ACCELERATED CLEANUP MODEL (SACK)
INTERMITTENT BULLETIN VOL.1 NO. 4
NAVY INSTALLATION RESTORATION PROGRAM MANUAL
NAVY/MARINB CORPS INSTALLATION RESTORATION MANUAL
HEALTH RISK ASSESSMENT PROGRAM. VERSION 1.1 1 OPERATING
INSTRUCTIONS - AIR RESOURCES BOARD AND OFFICE OF
ENVIRONMENTAL HAZARD ASSESSMENT
GUIDANCE FOR DATA US BAB I CITY IN RISK ASSESSMENT
QUICK REFERENCE PACT SHEET
CALIFORNIA EPA CRITERIA FOR CARCINOGENS
SUPERFUND PACT SHEET i POTS
QUICK REFERENCE FACT SHEET
GUIDANCE ON CONDUCTING NON-TIMB CRITICAL REMOVAL
ACTION UNDER CERCLA
CLASSIFICATION
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
ADMIN RECORD
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
KEY WORDS
HAS WASTE
PA
SI
REMOVAL
TECH/GUID DOC.
HAS WASTE
*NPL
TECH/GUID DOC.
HAZ HASTE
TECH/GUID DOC.
GUID
IRP
TECH/UUID DOC.
GUID
IRP
TECH/GUID DOC.
GUID
HRA
TECH/GUID DOC.
GUID
RA
DATA
TBCH/GUID DOC.
OUID
TECH/GUID DOC.
PCS
HAZ HASTE
ATSDR
TECH/GUID DOC.
RA
TECH/GUID DOC.
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
NIC SAN DIBOO
ThU Mnlnlilftttv* Record (AR) lixtox Include* rafeimen lo documents which cfo bJbBooriphlcal ieuieet.
Th««bWtogr«phte
-------
DATE - 09/11/97
ULBVANT GUIDAlM.* DOCUMENTS-OIUA, SIT* 24, SOU. CLBANUP. MCAS BL TOKO
PAGE
DOCUMENT. TYI'B. ..
tONTR/GUID. .NO. .
APPROX . 1 . OF . 1 AUCS
COMPDM 000421
DATA
000000000000000
0060
COMPDM 0003)0
CUID
0100
COHPDM 000)71
CU1D
000000000000000
0500
COMPPH 000011
CUID
9360.0-32
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-------
DATE - 09/10/97
RELEVANT GUIDANCE DOCUMENTS-OU2A, SITB 24, SOIL CLEANUP, MCAS BL TORO
PAOB -
DOCUHEm.TYPB. , .
eoNTR/ciiiD. .NO..
APPRO*. 1. OP. PACES
COMPDH 0004 OS
CUID
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CUID
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COMPDM OUU.J21
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000000000000000
0011
COMPDM 000053
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0004
COMPDH 000307
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COMPDM 000416
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DOC. DATE
CTO.NO..
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04/05/96
01/07/94
11/28/94
01/01/94
12/22/94
04/19/94
11/28/94
06/01/94
05/12/9S
OS/01/94
12/21/9*
Ot/01/94
OS/1S/9S
07/01/94
01/27/9S
08/01/94
05/15/9S
08/01/94
OS/1S/9S
08/01/94
PROM.SICHATURB
TO SUBJECT
TO. SIGNATURE
BECHTEL NATIONAL INC PROGRAM HEALTH AND SAFETY PLAN
EPA REGION IX THE PROPOSED 'NEW* SUPERPUND PASTER. PAIRER, MORE
EPPICIENT
EPA WASHINGTON DC MILITARY BASE CLOSURES i GUIDANCE ON EPA CONCURRENCE IN
THE IDENTIPICATION OP UNCONTAMINATED PARCELS UNDER
CERCLA SECTION 120 Ih)
EPA REOION IX ADDENDUM A PASTER, PAIRER, MORE EFFICIENT SUPERPUND
ADVANCES IN CONGRESS
DOD PINDINOS OP SUITABILITY TO TRANSFER FOR BRAC PROPERTY
DUD DEFENSE ENVIRONMENTAL CLEANUP PROGRAM PACT SHEET
THE RELATIVE RISK SITE EVALUATION CONCEPT
CAL EPA DTSC PUBLIC PARTICIPATION POLICY AND PROCEDURES MANUAL
DTSC CALIFORNIA DEPARTMENT OF TOXIC SUBSTANCES CONTROL
GUIDANCE FKh ECDUXJICAL RISK ASSESSMENT AT HAZARDOUS
HASTE SITES AND l-hKMITTED FACIILITIBS PARTS *A* t -B-
EPA REOION IX PRELIMINARY REMEDIATION GOALS (PRO) SECOND
HALF 1994
KPA DATA O'VI.ITT (iD-JBCTIVES DECISION ERROR FEASIBILITY
TRAILS IDQO/bbtT) USER'S GUIDE VERSION 4.0
Thto AdmJnWrattM Record (AR) Index IndudM reference* to documentt whi
W.u m. klfttftAMMhkL* ^UMlbut* mfm jwutabiftMrft |A llA nalt A| till* AR hilt IftOV HO
CLASSIFICATION
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
COMPENDIUM
KEY WORDS
H4SP
CUID
TECH/QUID DOC.
QUID
TECH/OUID DOC.
CUID
CERCLA
TECH/OUID DOC.
CUID
TECH/GUID DOC.
POST
TBCH/aUID DOC.
CLEANUP
RISK
EVALUATION
TBCH/OUID DOC.
TECH/GUID DOC.
TECH/GUID DOC.
PRO
TECH/OUID DOC.
TBCH/OUID DOC.
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
NTC SAN DIEGO
SOUTHWEST DIVISION
SALTON SEA
SALTON SEA
SALTON SEA
SALTON SEA
1 ha ett«i Moaratelv bi the Max
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OATS - 09/ll/»7
RELEVANT GUIDANCE DOCUMBNTS-OU2A, 81T1 24. SOIL CLEANUP. MCAS EL TORO
PAGE
DOCUMENT. TYPE. . .
CONTR/CUID. .NO. .
API'KUX . 1 . OF PAGES
COMPDM 000267
GUID
000000000000000
0051
COMPDM 000.-D9
COID
S090.1B
0450
COMPDM 000113
GUID
EPA S40R9406J
0026
COHPOM 000357
CUIO
000000000000000
0017
COMPDM 00044}
LTR
0007
COMPDM 000409
CUIO
OUOOOOOOOOOOOOO
0150
COMPDM 000439
GUID
0200
COMPDM 000440
LTR
OOOJ
DOC. DATS FROM. SIGNATURE
CTO.NO.. TO....
EPA CAT! TO SIGNA1URB
12/27/94 DTSC SACRAMENTO
09/07/94
01/04/95 DON
11/01/94
12/01/94 El'A HASHIMGTON
12/01/94
02/21/9* USEPA
02/01/9S
04/24/97 DON
10/11/9S
04/05/96 NFBSC KJkf HUNHWN
02/01/94
04/24/97 DOD
07/01/96
04/24/97 SRM-KEST. INC.
10/14/96
SUBJECT CLASSIFICATION
DRAFT GUIDANCE FOR ECOLOGICAL RISK A&bUSSMENT AT COMPENDIUM
HAZARDOUS HASTE SITES AND PERMITTED FACILITIES PART Ai
OVERVIEW AUGUST 1994 4 PART Bi SCOPING ASSESSMENT
ENVIkUNMENTAL AND NATURAL RESOURCES PROGRAM MANUAL COMPENDIUM
OPNAVINST 5090. IB
LABORATORY DATA VALIDATION FUNCTIONAL GUIDLINES FOR COMPENDIUM
EVALUATING INORGANICS ANALYSIS
USEPA REGION IX PRELIMINARY REMEDIATION GOALS COMPENDIUM
ENVIRONMENTAL REQUIREMENTS FOR FEDERAL AGENCY TO ADMIN RECORD
AGENCY PROPERTY TRANSFER AT BRAC INSTALLATIONS
NAVY INSTALLATION RESTORATION LABORATORY QUALITY COMPENDIUM
ASSURANCS GUIDE ITERIM GUIDANCE DOCUMENT
RELATIVE RISK SITE EVALUATION PRIMER ADMIN RECORD
FACT SHEET DESCRIBING USEPA' S NEW CANCER RISK ADMIN RECORD
GUIDELINES AND THEIR POTENTIAL IMPACT ON SITE CLEANUPS
KEY WORDS
GUID
HAZ WASTE
TECH/CUID DOC.
GUID
TECH/CUID DOC.
GUID
DATA
TECH/GUID DOC.
CERCLA
TECH/GUID DOC.
QUID
BRAC
TBCH/GUID DOC.
GUID
TBCH/GUID DOC.
GUID
RISK
SI
TECH/GUID DOC.
GUID
CANCER
CLEANUP
TECH/GUID DOC.
...Sit* Location
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
SOUTHWEST DIVISION
NTC SAN DIEGO
SOUTHWEST DIVISION
SOUTHWEST DIVISION'
SOUTHWEST DIVISION
SOUTHWEST DIVISION
This AdnikiMraUv* Record (AR) Index Includes reference* to document* which cKe MbDographlcel tource*.
The*e Monographic dtaUon* are considered to be part of tW» AR but may not be died *ep*ntery hi the Index.
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TOTAL RECORDS PKIIilEOi 127
REPORT SPECIFICATION PO» I RPT440
TITLEi RELEVANT GUIDANCE DOCUMLI.IS-OU3A. SITE 24, SOIL CLEANUP, HCAS EL
FILE: COMBINED Key Info, with Activity File
SELECTION CRITERIA:
101) Key Hords CONTAINS -TECH/UUlU UOC.« t OIC.No. IS 'COHPDH •
SORT CRITERIA>
01 Doc. Lute
PACE BREAK LEVELi
00 HO PAOEBREAK
TYPE REPORT FORM
PAPER COMBO KEY lKFO
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