Highlights National Risk Management Research Laboratory Ground Water and Ecosystems Restoration Division Robert S. Kerr Environmental Research Center Status Highlights January

HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the Week of January 23 2012
TECHNICAL ASSISTANCE
Technical Assistance Region IV: On November 29, 2011, Mr. Rob Earle (Shaw Environmental
& Infrastructure, Inc.), GWERD Center for Subsurface Modeling Support (CSMoS), under the
direction of Dr. Ralph Ludwig (GWERD), provided technical review comments to RPM Craig
Zellar on the report Kingston Ash Recovery I)roject Groundwater Flow and Transport Report dated
July 25, 2011. This was a review of the Ground Water Model for the Tennessee Valley Authority
(TVA) Kingston Ash Recovery Project, Harriman, TN. There are concerns that the ground water
flow model was calibrated to only one water level collection event. It is recommended that at
least two collection events, representing both high and low pool seasons, be used for calibration.
It is understood that the transport model cannot be calibrated at this time. CSMoS recommends
comparing model predictions for chemicals of concern (COC) concentrations to future sampling
events and documenting the compared data. This will serve as both a calibration and auditing of
the model.
(12-R04-004) (R. Ludwig (GWERD) 580-436-8603)
Technical Assistance Region V: On January 10, 2012, Dr. Daniel Pope (Shaw Environmental
& Infrastructure, Inc.), under the direction of Dr. David Burden (GWERD), provided technical
review comments to RPM Syed Quadri on the Field Sampling Plan for the Parson's Casket Site,
Belvidere, Boone County, Illinois (FSP), Parson's Casket Hardware Company Superfund Site.
Ground water contamination resulted from activities connected with die casting and finishing
metal parts for caskets. Some of the on-site and off-site contamination may also result from other
commercial offsite activities. In general, the FSP seems technically sound in that sampling and
analytical methods appear generally appropriate. However, the suitability of the FSP to achieving
the overall purposes of the FSP is not clear. A discussion of how past and future data collection
will be used in the pilot study design, and implementation, is recommended.
(12-R05-001) (D. Burden (GWERD) 580-436-8606)
Technical Assistance Region IX: On January 13,2012, Mr. Steven Acree (GWERD) and Dr. Robert
Ford (LRPCD) provided continued technical support to RPM Jere Johnson in a technical review
of the Background Ground Water Quality Assessment, Yerington Mine Site, Yerington, Nevada.
The document provides a framework for estimating concentrations of constituents in ground water
that has not been impacted by the site. The document was reviewed from the hydrogeologic and
geochemical perspectives. In general, the framework appears to be appropriate for this evaluation.
However, the specific wells used for estimating concentrations of constituents in ground water
that has not been impacted by the site should not be finalized until all lines of hydrogeochemical
evidence are evaluated.
(12-R09-002) (S. Acree (GWERD) 580-436-8601)
(R. Ford (GWERD) 513-569-7501)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the Week of January 3(1,2012
TECHNICAL ASSISTANCE
Technical Assistance Region IX: On January 18, 2012, Mr. Steven Acree (GWERD) continued to
provide technical support to RPM Jere Johnson in a technical review of the Public Information for
the Northern Portion of the Background Groundwater Study Area, Yerington Mine Site, Yerington,
Nevada. The document provides a compilation of publicly available information regarding water
diversion and usage within the study area. It will be an essential element in the understanding of
groundwater flow in this portion of the valley and a key resource during the modeling efforts. It is
recommended that effort be expended to determine the locations of points of return for irrigation
water to drains and ditches within the area, and that this information be included in the upcoming
remedial investigation work plan.
(12-R09-002) (S. Acree (GWERD) 580-436-8601)
Technical Assistance Region IX: On January 20, 2012, Mr. Steven Acree (GWERD) continued
to provide technical support to RPM Jere Johnson in a technical review of the Initial Bedrock
Characterization Activities, Yerington Mine Site, Yerington, Nevada. In general, the proposed
activities appear appropriate to enhance understanding of the hydrologic characteristics of bedrock
and allow planning of more detailed investigations. However, it is recommended that the list of
wells to be characterized under this phase be expanded, and that the suite of geophysical logs be
expanded to include caliper logs to confirm construction information.
(12-R09-002) (S. Acree (GWERD) 580-436-8601)
Technical Assistance Region II: On January 23, 2012, Dr. Richard Wilkin (GWERD) provided
technical review comments to RPMMark Austin on the report Arsenic Natural Attenuation Evaluation
at the Martin Aaron Saperfand Site in Camden, New Jersey. Overall, the effort described in the
technical report meets the stated objectives of the investigation. The methodology, data, and data
analysis are all of high quality. The primary conclusion that the upper clay layer of the Meadow
Mat Complex (MMC) is a significant sink for arsenic is well founded and supported by the work.
Improvements in understanding the long-term behavior of the MMC as a contaminant source would
require additional testing to evaluate leaching potential with representative site groundwater at
representative site geochemical conditions.
(12-R02-002) (R. Wilkin (GWERD) 580-436-8874)
TECHNICAL SUPPORT
Technical Support Region I: On January 19, 2012, Steven Acree (GWERD) and Robert Ford
(LRPCD) provided technical support to RPM Ginny Lombardo for the Fort Devens Superdfund
Site. They met with Region 1, the U.S. Army and their contractors to discuss groundwater and
sediment-related issues at the Shepley s Hill Landfill at Fort Devens, MA. Issues that were discussed
included sources for the arsenic observed in groundwater, performance of the groundwater extraction
system, remedy modifications, and enhancement of the groundwater monitoring network.
(S. Acree (GWERD) 580-436-8601)
(R. Ford (GWERD) 513-569-7501)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the Week of February 20, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region II: On February 7, 2012, Dr. Milovan Beljin (Shaw Environmental &
Infrastructure, Inc.), under the direction of Dr. David Burden (GWERD), provided technical review
comments to RPM Trevor Anderson on the Site Optimization Study for the King of Prussia (KOP)
Technical Corporation Site, Winslow Township, New Jersey (the Site), prepared by Roux Associates,
Inc. After the latest five-year review, the U.S. EPA requested a Capture Zone Assessment (CZA) be
conducted to confirm that the Groundwater Recovery and Treatment System (GWRTS) at the Site
provide sufficient capture of the groundwater plume to meet the remediation goals. Although the
theoretical capture zones were shown, the actual capture zone of the whole recovery system is not
documented and thus there is no comparison of the target and the actual capture zones. The lines
of evidence presented in the Report suggest that the system is recovering the contaminant mass
from the aquifer; however, there is not sufficient evidence to conclude that the system is efficient
in capturing the plume.
(12-R02-003) (D. Burden (GWERD) 580-436-8606)
Technical Assistance Region I: On February 9, 2012, Dr. Eva Davis (GWERD) provided technical
review comments to STL Steve Mangion on th eData Gap Action Plan (the Plan) for General Chemical
Corporation (GCC), in Framingham, Massachusetts, prepared by Groundwater & Environmental
Services, Inc. The Plan proposes to collect data that is needed to fully delineate and estimate the
volume of the dense nonaqueous phase liquid (DNAPL) likely present at the GCC site, as required
by the MassDEP in their December 16, 2011 letter. However, the Plan is lacking sufficient detail
to determine the appropriateness of the quantity of investigation borings and monitoring wells to
be installed and the methods proposed to install them. It is recommended that the starting point
for developing the Plan be compiling and assessing the historical characterization data for the site.
It is also recommended that additional data be collected to fill the data gaps and aid in creating
a NAPL conceptual site model that can be used to determine the most cost effective remedial
approach for the site.
(12-RO1-004) (E. Davis (GWERD) 580-436-8548)
Technical Assistance Region I: On February 10, 2012, Dr. Scott Huling (GWERD) and Dr. Bruce
Pivetz (Shaw Environmental & Infrastructure, Inc.) provided technical review comments to STL
Steve Mangion on the January 20, 2012 document entitled, "Data Gap Action Plan (DGAP)",
prepared by Groundwater and Environmental Services, Inc., regarding the General Chemical
Corporation Site, Framingham, Massachusetts. It is recommended that performance guidelines
in the development of a conceptual site model (CSM) include locations of DNAPL. It is also
recommended that all historical soil and ground water analytical results be compiled and presented
in a variety of formats, and that additional deeper monitoring locations be selected. Further, it is
recommended that the General Chemical site DNAPL conceptual model be developed based on
collection and examination of the site-specific data.
(12-RO 1-004) (S. Huling (GWERD) 580-436-8610)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the Week of February 27, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region IV: On February 10, 2012, Dr. Daniel Pope (Shaw Environmental &
Infrastructure, Inc.), under the direction of Dr. David Burden (GWERD), provided technical review
comments to Ben Bentkowski on documents for the FCX Inc. (Washington Plant) Superfund Site
(the Site) in Washington, NC. Comments address the development of an approach to evaluate a
monitored natural attenuation (MNA) remedy for the contaminants of concern (COCs) in ground
water. It is assumed that the necessary remedial activities, such as assessing/modeling ground
water flow and COC disappearance rates, have been/will be conducted to provide appropriate
understanding of Site processes. Given the limited knowledge about natural attenuation of the
Site COCs, it appears that if an MNA remedy for the Site is pursued, the assessment/monitoring
approach should be the first tier of the three-tiered "lines of evidence" approach. This decreasing
mass/concentration approach could include COC transformation products if appropriate. Site
activities should include continuing to analyze the "natural attenuation parameters".
(12-R04-005) (D. Burden (GWERD) 580-436-8606)
Technical Assistance Region II: On February 17, 2012, Mr. Steven Acree (GWERD) provided
technical review comments to RPM Clifford Ng on the Scenarios Evaluating Hydraulic Surcharging
Remedy (the Report), DuPont Pompton Lakes Works, Pompton Lakes, NJ. The report describes
ground water flow modeling scenarios used to evaluate the potential increases in the shallow ground
water flushing rates due to changes in locations and rates of treated water infiltration. Based on the
analyses presented in this report, it appears that infiltration of water at locations west of the plant
boundary will be needed to optimize ground water flow rates in some areas. It is also recommended
that the monitoring system near the plant boundary be enhanced through installation of additional
piezometers to provide hydraulic head data to better demonstrate hydraulic control of the plume.
(12RC02-001) (S. Acree (GWERD) 580-436-8609)
Technical Assistance Region IV: On February 17, 2012, Dr. Bruce Pivetz and Dr. Daniel Pope
(Shaw Environmental & Infrastructure, Inc.), under the direction of Mr. Steven Acree (GWERD),
provided technical review comments to RPM Clifford Ng on the Implementation Work Plan for
Application of enhanced in situ bioremediation (EISB) to Intermediate Groundwater near Well 128,
DuPont Pompton Lakes Works, Pompton Lakes, NJ. The work plan presents the proposed approach
for conducting a field pilot-scale study of EISB technology in the intermediate aquifer in the off-site
plume for the DuPont Pompton Lakes Works site. It is recommended that the analyses supporting
the projected aquifer responses are provided for review and that the projected hydraulic responses
be described in detail. The proposed frequency and locations for ground water level measurements
should be clarified and expanded. It is also recommended that additional information such as the
types, frequency, and monitoring locations for the system operating parameters be included in the
work plan.
(12RC02-001) (S. Acree (GWERD) 580-436-8609)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the Week of March 12, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region V: On February 17, 2012, Dr. Daniel Pope (Shaw Environmental &
Infrastructure, Inc.), under the direction of Dr. David Burden (GWERD), provided technical review
comments to RPM Donald Heller on the "Bench Scale and Pilot-Scale Treatability Study Work Plan
for the Eli Lilly & Company site located at the Evonik Degussa Corporation, Lafayette, Indiana"
(the Plan). The Plan discusses remediation efforts relating to the Evonik Degussa Corporation's
Tippecanoe Laboratories location. The proposed treatment train includes in-situ chemical oxidation
(ISCO) in source areas, followed by enhancedbioremediation and finally monitored natural attenuation
(MNA) in the source and plume areas. It is recommended that the Plan include additional discussion
of the bench-scale treatability study, the bioenhancement process, and performance monitoring.
(12-R05-002)	(D. Burden (GWERD) 580-436-8606)
Technical Assistance Region IX: On February 23, 2012, Dr. Michael Brooks (GWERD) provided
technical review comments to RPM Penny Reddy on the revised DRAFT Plume Cleanup Time
Evaluation, Middlefield-Ellis-Whisman Regional Groundwater Remediation Program, Mountain
View, California. This review addressed original comments on the subject report, the revised report,
and additional data files provided by Geosyntec Consultants, Inc. Responses to original comments
include additional calculations which support the use of the Box model as a screening level model.
However, concerns regarding the manner in which the Box model was used to simulate remedial
alternatives remain.
(12-R09-004)	(M. Brooks (GWERD) 580-436-8982)
SCTENTTFTC AND TECHNICAL PUBLICATIONS
Miniter, Jeremy M. (School of Aerospace Medicine, Wright-Patterson AFB, OH), MarkN. Goltz,
(AF Institute of Technology, Wright-Patterson AFB, OH), Avery H. Demond (Univ. of Michigan,
Ann Arbor, MI), and Junqi Huang (GWERD). 2011. Diffusion in Clay Layers & Groundwater
Remediation. Air Force Civil Engineer, Vol. 19(3): 22-23, 2011.
(J. Huang (GWERD) 580-436-8915)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the Week of March 26, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region VII: On March 15, 2012, Dr. Scott Huling (GWERD) provided
technical review comments to RPM Brad Vann on the document entitled, "Source Area Remedial
Alternatives Evaluation", Lindsay Manufacturing, prepared by URS Corporation and transmitted to
US EPARegion 7 (February 17,2012). Generally, ISCO is implemented in source areas to target and
to significantly reduce the mass of contaminant(s)that could be potentially transported downgradient.
In general, steps have been taken and are being planned to meet the site characterization needs to
address this requirement. The details will need to be integrated and used to develop an ISCO design
and workplan. The reaction between the oxidant and target compound(s) must be significant to
assure the destruction of the target contaminants. If the oxidant used is not an appropriate oxidizer
of the compounds that represent a significant concentration in ground water, it is recommended that
treatability testing be conducted to assess the extent of transformation that can be achieved of these
contaminants during oxidative treatment. It is also recommended that a site specific evaluation of
the potential impact of heavy metals mobilization be conducted to assess whether ground water
monitoring and possible abatement for these metals is needed.
(12-R07-002)	(S. Huling (GWERD) 580-436-8610)
SCIENTIFIC AND TECHNICAL PUBLICATIONS
Harrison, Melanie D. (Univ. of MD, Baltimore County, MD), Peter M. Groffman (Cary Institute
of Ecosystem Studies, Millbrook, NY), Paul M. Mayer (GWERD), and Sujay S. Kaushal (Univ.
of MD, College Park, MD). 2012. Microbial Biomass and Activity in Geomorphic Features in
Forested and Urban Restored and Degraded Streams. Ecological Engineering 38:1-10.
(P. Mayer (GWERD) 580-436-8637)
Doheny, Edward J., Jonathan J. A. Dillow (USGS, Baltimore, MD), Paul M. Mayer (GWERD), and
Elise A. Striz (formerly of GWERD). 2012. Geomorphic responses to stream channel restoration
at Minebank Run, Baltimore County, Maryland, 2002-08: U.S. Geological Survey Scientific
Investigations Report. 2012-5012, 61 p. http://pubs.usgs.gov/sir/2012/5012/.
(P. Mayer (GWERD) 580-436-8637)
COMMUNITY OUTREACH
On March 9, 2012, the following individuals served as judges at the 2012 Oklahoma State Science
and Engineering Fair at East Central University: Special Award Judge Dr. Ann Keeley (GWERD);
Category Judges: Dr. John Wilson, Dr. Mary Gonsoulin, Mr. Joe Williams, Mr. Tim Canfield, Ms.
Kelly Smith, Dr. Ken Forshay, Dr. Carl Miller, and Dr. Ann Keeley (GWERD), and Dr. Dennis
Fine and Dr. Daniel Pope (Shaw Environmental & Infrastructure, Inc.).

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the Week of April 2, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region II: On March 28, 2012, Dr. Scott Huling (GWERD) and Dr. Bruce
Pivetz (Shaw Environmental & Infrastructure, Inc.) provided technical review comments to RPM
Kevin Willis on the "Operable Unit 1 Preliminary (30%) Remedial Design Report", Fulton Avenue
Superfund Site, 150 Fulton Avenue, Garden City Park, Nassau County, New York, February 2012,
prepared by ERM. This technical review involved a critical analysis of issues relating to the fate
and transport of ground-water contaminants, in-situ chemical oxidation (ISCO), ground-water
pump-and-treat, and other possible remedial options/alternatives. Given the inability to specifically
identify the location of possible source areas, it appears the deployment of ISCO would have
limited benefit relative to other possible remedial options. However, assuming the locations of
contaminant sources become better defined, it is recommended that ISCO be re-considered in light
of new data and information.
(12-R02-004) (S. Huling (GWERD) 580-436-8610)
Technical Assistance Region III: On March 29, 2012, Dr. Ann Keeley (GWERD) provided
technical review comments to RPM Huu Ngo on the "Pilot Test Work Plan Enhanced Reductive
Dechlorination Central Sprinkler Corporation Site OU3" at Tyco Safety Products in Nansdale,
PA, North Penn Area 6. In general, the work plan appears reasonable in testing and assessing the
viability of enhanced reductive dechlorination as a full-scale remedial strategy for chlorinated
contaminants of concern in groundwater at the site. A major concern is continuity between the
injection wells and nearest possible monitoring points due in large measure to the complexity of
groundwater flow. It is recommended that ground water contour maps be developed at the site
to demonstrate flow directions during different times of the year. It is also recommended that a
conservative tracer be added to the injected fluid.
(12-R03-002) (A. Keeley (GWERD) 580-436-8890)
Technical Assistance Region IX: On April 2, 2012, Dr. Eva Davis (GWERD) provided technical
review comments to RPM Carolyn D'Almedia on the Revised DNAPL Feasibility Study, Montrose
Superfund Site, Los Angeles, California, prepared by AECOM and dated December 7, 2011. In
general, the Feasibility Study (FS) correctly identifies applicable remediation technologies for
the DNAPL-contaminated zones of the Playa Deposits, Palos Verdes Sands, and saturated and
unsaturated Upper Bellflower Aquitard (UBA). From a technical perspective either of the thermal
technologies would be a suitable remedy for the DNAPL-contaminated saturated portion of the
UBA. However, the FS is not totally accurate in the discussions of the advantages and disadvantages
of the remedial technologies under consideration. An important decision that must be made is the
area and volume of the DNAPL-contaminated subsurface that will be targeted by the remediation.
Considerable effort has already been put into obtaining characterization data, and the data has
been interpreted to try to define a focused area which contains the mobile DNAPL. However, the
currently defined focus area does not contain all the mobile DNAPL.
(12-R09-005) (E. Davis (GWERD) 580-436-8548)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the Week of April 16, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region IV: On March 18, 2012, Dr. Richard Wilkin (GWERD) provided
technical review comments to RPM Gary Cygan on the "Cap Model for Arsenic-Contaminated
Sediments Adjacent to the Tyco Fire Products LP Facility in Marinette, Wisconsin", provided by
Reible et al. and the accompanying article published in Soil and Sediment Contamination by Lambert
and Reible (2009, volume 18, pages 470-488). The calculator provides a numerical modeling tool to
predict cap performance. This review indicates that it would be worthwhile to review the spreadsheet
calculator in a form that is specific to the Tyco site. Unless all geochemical variability is captured,
modeling efforts will fall short of reaching ideal design parameters. Secondly, it is recommended
that any site data related to arsenic sequestration be pulled into a useable form for review.
(12RC05-002) (R. Wilkin (GWERD) 580-436-8874)
Technical Assistance Region II: OnApril 7,2012,Mr. StevenAcree (GWERD), Dr. BrucePivetz and
Dr. Daniel Pope (Shaw Environmental & Infrastructure, Inc.) provided technical review comments
to RPM Clifford Ng on the "Response to Comments Regarding EISB Implementation Plan and
Hydraulic Surcharging", DuPont Pompton Lakes Works, Pompton Lakes, NJ. The responses
appear to satisfactorily address the comments on the EISB work plan and the hydraulic scenarios
technical memorandum. It is recommended once hydraulic data and tracer data are obtained this
data should be used to compare the actual flow field to the design predictions and evaluate the
need for modification of the model. It is also recommended that initial data be used to prepare a
qualitative breakthrough curve to provide an indication that the system is behaving approximately
as initially assumed, or to provide an early warning if there is some major discrepancy.
(12RC02-001) (S. Acree (GWERD) 580-436-8609)
Technical Assistance Region II: OnApril 9,2012, Mr. StevenAcree (GWERD) provided technical
review comments to RPM Clifford Ng on the "Horizontal Well Implementation Technical
Memorandum", DuPont Pompton Lakes Works, Pompton Lakes, NJ. The document describes the
conceptual approach for evaluating and designing water infiltration using horizontal wells near the
plant boundary. It is recommended that the first phase of this evaluation concentrate on increasing
the flushing rate in the western portion of the plume to evaluate the performance of horizontal
well injection. It is recommended that a series of horizontal wells (versus one horizontal well) be
used to provide adequate injection control. It is also recommended that detailed data regarding
hydraulic properties in the shallow zone be obtained to support the design of a site-wide injection
system using horizontal wells.
(12RC02-001) (S. Acree (GWERD) 580-436-8609)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the Week of April 30, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region IV: On April 16, 2012, Dr. Eva Davis (GWERD) provided technical
review comments to RPM Turpin Ballard on the Remedial Design Report, Certified for Construction
Design Drawings and Technical Specifications Package, for the Groundwater Operable Unit for the
Phase Ha Volatile Organic Compound Contamination at the C-400 Cleaning Building at the Paducah
Gaseous Diffusion Plant, Paducah, Kentucky, dated March 2012. In general, this document does
not contain sufficient detail to demonstrate the adequacy of the design, or to construct the system. A
monitoring plan ensures that the data collected will demonstrate the effectiveness of the remediation
system and aid in determining when the process has met its objectives. The review process would
have been more efficient and effective if the O&M plan, which is to contain the monitoring plan,
had been submitted for review at the same time as the Remedial Design Report.
(12-R04-006) (E. Davis (GWERD) 580-436-8548)
Technical Assistance Region I: On April 25, 2012, Dr. Eva Davis (GWERD) provided technical
review comments to RPM Kevin Heine on the Source Area Pre-Design Investigation Work Plan,
Revision 1, for the South Municipal Water Supply Well Superfund Site, dated March 2012. The
primary purpose of this Pre-Design Investigation is to delineate the source zone at the New
Hampshire Ball Bearing facility to determine the area(s) that will be treated by in situ thermal
remediation, and to obtain data to refine the estimate of the amount of contaminant mass within the
treatment area(s), as this is needed to design the above ground vapor and liquid treatment systems
that are a part of the thermal treatment system. The proposed investigation does not appear to be
definitive in determining the area or volume that should undergo in situ thermal treatment due to
the presence of dense nonaqueous phase liquid (DNAPL). As this is a pre-design investigation,
data from screening techniques for characterization such as Membrane Interface Probe (MIP) are of
limited usefulness, as MIP response cannot be directly correlated to DNAPL presence or absence.
Ground water concentrations obtained from vertical profiling using a Waterloo profiler also only
provides screening data because ground water concentrations do not correlate directly with the
presence or absence of DNAPL.
(12-R01-005) (E. Davis (GWERD) 580-436-8548)
COMMUNITY OUTREACH
2012 HydroDays participants gathered in south central Oklahoma to experience Arbuckle Simpson
Aquifer during April 12 - 14th. As one of HydroDays co-sponsors, the RSKERC, welcomed 70
visitors including hydrogeology professors and students from Oklahoma State Univ., Univ. of
Arkansas - Fayetteville, Illinois State, Univ. of Texas at Austin, Emporia State Univ., East Central
Univ., as well as hydrologists from the USGS, Oklahoma Water Resource Board and the Edwards
Aquifer Authority for a tour of the GWERD facility including lecturers, and laboratory and field
project demonstrators on April 13th. The event was hosted by Dr. Randall Ross.
(Misc.) (R. Ross (GWERD) 580-436-8611)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for May 28, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region X: On May 22,2012, Dr. Scott Huling (GWERD) and
Dr. Bruce Pivetz (Shaw Environmental & Infrastructure, Inc.) provided technical
review comments to RPM Kim Prestbo and STL Kira Lynch on the "Response to 8
March 2012 Regulatory Comments on the S S-3 9 Pilot Testing Technical Memorandum
(revision 2)", for Fairchild AFB. As mentioned previously, the selection of ISCO at
this site appears appropriate. However potential limitations of the technology involve
the effects of aquifer heterogeneities and the ability to effectively deliver sufficient
quantities of oxidant over the targeted zones. It is recommended that EPA carefully
review the proposed spacing of injection wells/points, as well as the oxidant loading
(oxidant mass and solution volume), in the ISCO work plan when submitted by the
responsible parties. Specifically, it is recommended that EPA carefully evaluate the
injection wells/points given the ROI limitation associated with this technical issue.
(12-R10-001)	(S. Huling (GWERD) 580-436-8610)
Technical Assistance Region III: On May 29, 2012, Dr. Scott Huling (GWERD)
and Dr. Saebom Ko (National Research Council) provided technical review
comments to RPM Darius Ostrauskas on the "April 27, 2012 Fike/Artel Superfund
Site, Sodium Persulfate Bench Scale Treatability Study" involving the oxidation of
hexamethylphosphoramide (HMPA) in aquifer material and ground water samples.
The results of the study indicate that the target compound, HMPA, was oxidized using
natural activation of persulfate. In general, HMPA is an unusual compound that has
limited chemical oxidation background information. Prior to pilot-scale deployment of
the technology, it is recommended that the chromatograms in the report are reviewed
to assess whether there are decomposition products resulting from HMPA oxidation
that represent unacceptable exposure pathways and/or health risks. Specifically, this
would involve a comparison of reaction byproducts measured in the oxidant-free and
oxidant-amended test reactors.
(12-R03-001)
(S. Huling (GWERD) 580-436-8610)

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National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for June 11, 2012


TECHNICAL ASSISTANCE
Technical Assistance Region III: On June 6, 2012, Dr. Scott Huling (GWERD) provided technical review
comments to RPM Darius Ostrauskas on the "Remedial Design Report for the Phase IA Sodium Persulfate
GroundwaterTreatment System", Fike/Artel Superfund Site, Nitro, West Virginia (April 18,2012). In general,
the remedial design report is lacking in detail regarding the results from previous site characterization and
remedial studies. The remedial design report should be a stand-alone document that contains information
that supports the selection of design parameters used in the field scale deployment of in-situ chemical
oxidation (ISCO). It is recommended that the revised remedial design report includes a conceptual model
which communicates horizontal and vertical profile depiction of the ground water HMPA contamination
plume in conjunction with the ground water flow direction, oxidant injection systems, projected radii of
influences of the injected oxidant, a cross-section that depicts the source area(s), ground water plume, etc.
(12-R03-001)	(S. Huling (GWERD) 580-436-8610)
Technical Assistance Region V: On June 7,2012, Dr. Daniel Pope (Shaw Environmental & Infrastructure, Inc.),
under the direction of Dr. David Burden (GWERD), provided technical review comments to RPM Donald
Heller on the Response To Comments U.S. EPA T'ebruary 17, 2012 Letter, the revised Compound Specific
Isotope Analysis (CSIA) Work Plan, and the revised Bench-Scale and Pilot Scale Treatability Study Work
Plan for the Eli Lilly & Company site located at the Evonik Degussa Corporation, Lafayette, Indiana. The
details of the bioremediation portion of the pilot study should be included, and the process and approach
for choosing the bioremediation details should be discussed. Also, a letter report should be provided
immediately after the pilot scale ISCO effort, showing the results of the ISCO pilot and the plans/details of
how the bioremediation pilot will be revised/conducted.
(12-R05-002)	(D. Burden (GWERD) 580-436-8606)
Technical Assistance Region V: On June 7, 2012, Dr. Daniel Pope (Shaw Environmental & Infrastructure,
Inc.), under the direction of Dr. David Burden (GWERD), provided technical review comments to RPM Donald
Heller on the Monitored Natural. Attenuation Work Plan - Revised 8.24.10 for the Demmer Properties, LLC/
Former Motor Wheel Facility, Lansing, Michigan. Demmer proposes to use MNAto control and eventually
reduce contaminant concentrations in ground water both on and off Site. There appears to be some remaining
source material that is supplying contaminants to the ground-water contaminant plume which makes the
applicability of MNA questionable until the sources are controlled. Also, if there is much variation in ground
water flow direction, performance monitoring would be required to distinguish contaminant degradation
from the effects of plume movement.
(12-R05-002)	(D. Burden (GWERD) 580-436-8606)
SCIENTIFIC AND TECHNICAL PUBLICATIONS
Ko, Saebom (NRC), Michelle Crimi (Clarkson Univ., Potsdam, NY), Bruce K. Marvin (Geosyntec, Oakland,
CA), Victor Holmes (Amyris Biotechnology, Inc., Emeryville, CA), and Scott G. Huling (GWERD). 2012.
Comparative study on oxidative treatments of NAPL containing chlorinated ethanes and ethenes using
hydrogen peroxide and persulfate in soils. Journal of Environmental Management 108 (2012) p. 42-48.

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for June 25, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region IX: On June 18, 2012, Dr. Eva Davis (GWERD) provided technical
review comments to RPM Carolyn d'Almeida on the "Draft Focused Feasibility Study, Remedial
Alternatives for Operable Unit 2, Site ST012,Former WilliamsAirForceBase, Arizona", dated May
31, 2012. In general, the Focused Feasibility Study (FFS) adequately identifies and evaluates the
appropriate technologies for remediation of site ST012, and the recommended alternative, Steam
Enhanced Extraction (SEE) followed by enhanced bioremediation, is an appropriate technology to
accomplish the remedial goals outlined in the FFS. However, the interpretation that the benzene
plume is stable is inaccurate. Clarification should be provided in the FFS about whether or not
additional field data collection will be done to delineate the treatment area, and field sampling plans
for performing the analysis should be submitted for review.
(12-R09-006)	(E. Davis (GWERD) 580-436-8548)
Technical Assistance Region IV: On June 25, 2012, Dr. Scott Huling (GWERD) and Dr. Bruce
Pivetz (Shaw Environmental & Infrastructure, Inc.) provided technical review comments to RPM
Robenson Joseph on the Laboratory Evaluation of Natural Oxidant Interaction and Buffering
Capacity, May 31, 2012, prepared for TECO/Peoples Gas System by University of Waterloo. The
work plan describes the proposed laboratory testing of natural oxidant interaction (NOI) to support
evaluation of in situ chemical oxidation (ISCO) at the West Florida Natural Gas Company Site,
Ocala, Marion County, Florida. It is recommended that subsequent interpretation and use of the
NOI data in evaluating the feasibility of ISCO at the site be carefully reviewed. The testing will
provide NOI values for homogenized crushed weathered limestone. It appears that the conceptual
model assumes that contaminant oxidation does not occur during the timeframe in which the
natural oxidant demand (NOD) is taking place. It is recommended that the workplan also recognize
simultaneous oxidation of contaminant(s) and aquifer solids.
(12-R04-003)	(S. Huling (GWERD) 580-436-8610)
SCTENTTFTC AND TECHNICAL PUBLICATIONS
Faulkner, Barton R. (GWERD), J. Renee Brooks (USEPA, Corvallis, OR), Kenneth J. Forshay
(GWERD), Steven P. Cline (USEPA, Corvallis, OR). 2012. Hyporheic flow patterns in
relation to large river floodplain attributes. Journal of Hydrology 448-449 (2012) 161-173.
http:dx.doi. org 10.1016j.jhydrol.2012.04.039.

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for July 19, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region VI: On June 27,2012, Dr. Scott Huling (GWERD) provided technical
review comments to RPM Stephen Tzhone on the "2011 Annual Report Arkwood, Inc. (Omaha,
AR)" for the Arkwood Superfund Site. The primary obj ective of the Arkwood site ozone treatment
system is unclear. Assuming the treatment objective is to achieve significant contaminant mass
reductions in the Arkwood source area, other more aggressive remedial technologies, including
in-situ chemical oxidation (ISCO) are recommended. This would require a focused feasibility study
to identify and select a remedial technology capable of achieving the treatment objectives. It is
proposed, but clearly not confirmed, that PCP-contaminated ground water, emanating from the
contamination site, is not captured, and migrates beyond New Cricket Spring in the ground water.
If contaminated ground water bypassing New Cricket Spring represents unacceptable exposure
pathways and risk, it is recommended that additional site characterization and a fate and transport
investigation be conducted to assess the extent to which this condition may be occurring.
(12-R06-002) (S. Huling (GWERD) 580-436-8610)
Technical Assistance Region VII: On July 3, 2012, Dr. Michael Brooks (GWERD) provided
a technical review to RPM Clint Sperry on the 2012 Update to the Area 17B Source Area IRZ
Timeframes, Area 17B Oil and Solvent Pits (Area 17B), Northeast Corner Operable Unit (NECOU),
Lake City Army Ammunition Plant (LCAAP), Independence, Missouri. Two models were used to
estimate remedial timeframes: a Pore Flushing (PF) Model and a Mass Removal (MR)Model. Both
models should be considered screening level models since they approximate complex contaminant
fate and transport processes in the real environment using simplified mathematical formulations.
Uncertainty in the values used for the following parameters may have a significant impact on the
remedial timeframe estimates: the degradation rate coefficient, the degradation rate coefificent
enhancement factors, the retardation factor, and the initial concentrations. Finally, the potential
impact of flow field heterogeneity on remedial lifetime estimates should be considered.
(12-R07-003) (M. Brooks (GWERD) 580-436-8982)
Technical Assistance Region IX: On July 11,2012, Mr. StevenAcree (GWERD) provided technical
review comments to RPM Jere Johnson on the Groundwater Flow Modeling Deliverables, Yerington
Mine Site, Yerington, Nevada. In general, the proposed deliverables appear to be appropriate
steps in the groundwater model development. However, it is suggested that the time frame for the
work plan be accelerated. It is recommended that the proposed work plan be expanded to include
the conceptual model for the transport component as well as the conceptual model for the flow
component. It is also recommended that the outline include a section concerning the analysis of
data gaps.
(12-R09-002) (S. Acree (GWERD) 580-436-8609)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the week of August 6, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region IX: On July 23, 2012, Dr. Daniel Pope and Dr. Bruce Pivetz (Shaw
Environmental & Infrastructure, Inc.), under the direction ofDr. DavidBurden (GWERD), provided
technical review comments to RPM Rose Marie Caraway on the Draft Bench-Scale Treatability
Study Work Plan, AMCO Chemical SuperfundSite, 1414 3rd Street, Oakland, California, March 28,
2012 (the work plan), prepared for USEPA by CDM Federal Programs Corporation on behalf of
Innovative Technical Solutions, Inc. The work plan proposes laboratory bench-scale testing be
conducted to evaluate potential remedial technologies for soil and ground water contaminated by a
variety of contaminants at the Site. Recommendations include the addition of sampling locations
for Test Conditions 1 and 2, and the inclusion of persulfate in the measured analytes for Test
Condition 2. It is also recommended that analytical data be obtained for chlorinated pesticides,
aldrin and dieldrin, in addition to data for endrin. Also, the work plan suggests spiking the soil -
this is not recommended.
(12-R09-009) (D. Burden (GWERD) 580-436-8606)
Technical Assistance Region IV: On July 30, 2012, Dr. Eva Davis (GWERD) provided a technical
review to RPM James Hou on the Preliminary (90%) Remedial Design Basis of Design Report,
Revision 0, Alaric Site, Tampa, Florida, June 2012. It is recommended that the site preparation
and the thermal remediation work be addressed in separate documents. It is also recommended that
the conceptual design for thermal remediation be deleted to allow vendors to propose the thermal
technology they believe is best suited for the site. Additional site characterization data including
soil types, hydrogeology, and contamination levels should be included in the report. The target
area for the thermal remediation should be clearly defined - both horizontally and vertically. Also,
the goal of the thermal remediation should be more clearly defined.
(12-R04-007) (E. Davis (GWERD) 580-436-8548)
Technical Assistance Region IX: On July 31,2012, Mr. Steven Acree (GWERD) provided technical
review comments to RPM Jere Johnson on the Aquifer Test Data Summary Report, Yerington Mine
Site, Yerington, Nevada. In general, the aquifer test appears to have been performed and analyzed
using accepted procedures. The data and results should provide useful constraints and information
during the construction of the groundwater flow model and may also be useful during calibration
of the model. It is recommended that a detailed plan for conducting a borehole flowmeter survey
be included in the report.
(12-R09-002) (S. Acree (GWERD) 580-436-8609)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the week of August 13, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region IV: On August 2, 2012, Dr. Bruce Pivetz (Shaw Environmental &
Infrastructure, Inc.), under the direction of Dr. Randall Ross (GWERD) provided technical review
comments to RPM Galo Jackson on the Final Work Plan for CO-, Sparging Proof of Concept
Test, LCP Chemicals Superfund Site, Brunswick, GA, July 3, 2012 (the work plan), prepared for
Honeywell by Mutch Associates, LLC and Parsons. The work plan proposes a "proof of concept"
field pilot study for the sparging of C02 (g) into the caustic brine pool (CBP) at the site. The C02
sparging is intended to lower the pH and density of the CBP. In July 2010, a work plan had been
submitted by Honeywell that similarly proposed C02 sparging, but in a larger-scale field pilot
test. The work plan is for a smaller-scale pilot test that appears to carry less risk than the proposed
activities described in the July 2010 proposal. It appears that the pilot test will provide some useful
information regarding the C02 sparging technology that can be used to evaluate its suitability
for full-scale implementation. Additional (or relocated) new monitoring wells in different radial
directions would help in evaluating the three-dimensional pattern of C02 distribution or effects. The
work plan mentions the use of a tracer to indicate gas distribution; however, the work plan should
be revised to fully discuss the use and monitoring of the tracer. It is also recommended that the
post-sparging aquifer test be delayed until after the six-month monitoring to avoid complication
of interpretation of conditions throughout the sparged region.
(12-R04-001) (R. Ross (GWERD) 580-436-8611)
SCTENTTFTC AND TECHNICAL PUBLICATIONS
Johnson, Karen T. and Margie Wickham-St. Germain (USEPA, Region 7), Saebom Ko (National
Research Council, GWERD), and Scott G. Huling (GWERD). 2012. Binary Mixtures of
Permanganate and Chlorinated Volatile Organic Compounds in Groundwater Samples: Sample
Preservation and Analysis. Ground Water Monitoring & Remediation, 32, no. 3, Summer 2012,
pages 84-92.
Ko, Saebom (National Research Council (GWERD)), Scott G. Huling (GWERD), and Bruce Pivetz
(Shaw Environmental & Infrastructure, Inc. (GWERD)). 2012. Groundwater Sample Preservation
at In-Situ Chemical Oxidation Sites - Recommended Guidelines. EPA/600/R-12/049.

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the week of September 3, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region V: On August 13, 2012, Dr. Daniel Pope (Shaw Environmental &
Infrastructure, Inc.), under the direction of Dr. David Burden (GWERD), provided technical review
comments to RPM Donald Heller on the Response To Comments U.S. EPA June 7, 2012 Letter, the
Report Of Preliminary Compound Specific Isotope Analysis Study, and the Revised Bench-Scale
And Pilot-Scale Treatability Study Work Plan for the Eli Lilly & Company site located at the Evonik
Degussa Corporation, Lafayette, Indiana. In general, it appears that the responses and revisions
adequately address the earlier comments on the bench scale and pilot scale treatability work plan
drafts. It is recommended that the geochemical and hydrological data (in addition to the contaminant
and reagent data) gathered during the pilot scale ISCO effort be included in the "brief letter report."
(12-R05-002) (D. Burden (GWERD) 580-436-8606)
TechnicalAssistance Region VI: OnAugust 15,2012,Dr. Scott Huling (GWERD) provided technical
review comments to RPMs Ruben Moya and Stephen Tzhone on the "Final Report Groundwater
Tracing Investigation, Arkwood Inc. Site, Omaha, AR. Based on a preliminary understanding of
the waste handling at the site, the majority of the wood preserving waste was historically placed
into the on-site sinkhole, i.e., released into the subsurface, and then dissipated with time. It is
reasonable to conclude that the release of the dye along the stream channels does not simulate
contaminant transport from the site where the maj ority of the contamination was released/disposed.
It is recommended that a fate and transport investigation be conducted to assess the extent to which
contaminated ground water may be leaving the site. This may require additional site characterization
activities to fill data gaps. It is also recommended that an assessment be performed to determine
whether New Cricket Spring captures all the contaminated ground water from the site.
(12-R06-002) (S. Huling (GWERD) 580-436-8610)
Technical Assistance Region III: On August 17, 2012, Dr. John Wilson (GWERD) provided
technical review comments to RPM Debra Rossi on the "First Quarter 2012 (January-March)
Bioventing Activities Summary Report Maryland Sand, Gravel & Stone Site Elkton, Cecil County,
Maryland." Dr. Wilson reviewed the report and provided recommendations regarding operation of
the bioventing system as well as some insight on absence of TCE intermediates in Pond 2 area. It
is recommended that the criteria for the rate of oxygen depletion be supplemented with additional
criteria. It is also recommend that appropriate efforts be made to remove enough ground water
to bring the conditions at the site within the original conceptual model for the bioventing remedy.
(12-R03-004) (J. Wilson (GWERD) 580-436-8534)

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HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the week of September 17, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region III: On August 21, 2012, Dr. Scott Huling (GWERD) provided
technical review comments to RPM Darius Ostrauskas on the "Fike/Artel Superfund Site Response
to U.S. EPA Comment(s) - Sodium Persulfate Bench Scale Treatability Study Report; and, Phase
IA Sodium Persulfate Groundwater Treatment System (July 30, 2012). It is recommended that this
document be a stand-alone document, or include attachments that describe the proposed details of
the full-scale remedial design of in situ chemical oxidation (ISCO). Also, a monitoring network
should be established that can adequately assess oxidant distribution and treatment performance.
Assuming incomplete oxidant distribution is determined, additional oxidant injection between
injection points/wells can be performed using direct push technology.
(12-R03-001) (S. Huling (GWERD) 580-436-8610)
Technical Assistance Region IX: On August 24, 2012, Mr. Steven Acree (GWERD) provided
technical review comments to RPM Jere Johnson on the Groundwater Modeling Objectives,
YeringtonMine Site, Yerington, Nevada. In general, the proposed obj ectives appear to be appropriate
to support evaluations in the upcoming Remedial Investigation (RI) and Feasibility Study. It is
recommended that the first proposed objective be revised to specifically include evaluation of the
historic hydrogeologic conditions at the site to the extent supported by available data and reasonable
assumptions. Quantitative evaluations ofthe historic groundwater fiowfield will provideuseful input
into interpretations related to the assessment of background conditions and other aspects of the RI.
(12-R09-002) (S. Acree (GWERD) 580-436-8609)
Technical Assistance Region V: On August 30, 2012, Dr. Daniel Pope (Shaw Environmental &
Infrastructure, Inc.), under the direction of Dr. David Burden (GWERD), provided technical review
comments to RPM Donald Heller on the Monitored Natural Attenuation Annual Report - Former
Motor Wheel Facility; the MNAReport) concerning activities related to monitored natural attenuation
(MNA) attheDemmer Properties, LLC/Former Motor Wheel Facility, Lansing, Michigan (the Site).
Both the MNAReport and the previously-reviewed MNA Work Plan provide Site information and
discussion of aspects of the general approach to Site remediation and specifically to evaluation and
use of MNA as conceived by Demmer and Demmer's consultants AECOM. The conclusions in the
documents about the viability of MNA as a sole remedy for ground water at the Site are not well
supported by the data and discussions. It is recommended that contaminant sources be carefully
defined and controlled; that the dissolved contaminant plumes be carefully defined; and that active
remediation efforts be initiated for plume remediation.
(12RC05-001) (D. Burden (GWERD) 580-436-8606)

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M HIGHLIGHTS /
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
1 Status Report for the week of October 15, 2012

TECHNICAL ASSISTANCE
Technical Assistance Region IX: On September 26,2012, Dr. Robert Ford (LRPCD) and Mr. Steven
Acree (GWERD) provided technical review comments to RPM Jere Johnson on the laboratory
procedure SOP-23 Aquifer Solids Testing-Redox Preserved Sample Preparation & Testing, for
Yerington Mine Site, Yerington, Nevada. In general, the procedures described in this SOP are
technically sound. It is recommended that additional information be provided in the SOP concerning
operating equipment and materials. Modifications in the text describing some processes in the SOP
are also recommended.
(12-R09-002) (R. Ford (LRPCD) 513-569-7501)
(S. Acree (GWERD) 580-436-8609)
Technical Assistance Region IV: On October 9,2012, Dr. Eva Davis (GWERD) provided technical
review comments to RPM Turpin Ballard on the Supplemental Technical and Cost Evaluations of
In Situ Chemical Oxidation and Steam Enhanced Extraction for the Phase IIB Portion of the C-400
Interim Remedial Action at the Paducah Gaseous Diffusion Plant (dated September 14, 2012).
The review focused on the Review of TerraTherm Model Results and Approach Memorandum by
Geosyntec Consultants, and the comments contained in the transmittal letter from the Department of
Energy (DOE). The specific issue being evaluated was the degree of steam override to be expected
in the Regional Gravel Aquifer (RGA) in the C-400 Area, and whether it could be controlled by the
steam injection conditions to allow for a reasonable spacing of steam injection and extraction wells
to remediate the RGA in a cost effective manner. The modeling was done with a proprietary model
developed by the Technical University of Denmark. This model has been used for approximately 10
years to predict steam migration in the subsurface and as a design aid for steam inj ection remediation
systems. The major concerns raised by the Geosyntec memorandum and the transmittal letter
pertain to assumptions of steam injection pressure, subsurface pressure, boundary conditions, and
hydraulic conductivity used by TerraTherm to conduct modeling. General concerns addressed in
the transmittal letter about the construction of the model and its results, and specific comments
about statements made in the Geosyntec memorandum were addressed in the detailed review.
(12-R04-006) (E. Davis (GWERD) 580-436-8548)
SCTENTTFTC AND TECHNICAL PUBLICATIONS
Hutson, Andy (Oklahoma State University), Saebom Ko (National Research Council, GWERD),
Scott G. Huling (GWERD). 2012. Persulfate oxidation regeneration of granular activated carbon:
Reversible impacts on sorption behavior. Chemosphere. 89 (2012) 1218-1223.

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M HIGHLIGHTS /
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
1 Status Report for the week of October 29, 2012


TECHNICAL ASSISTANCE
Technical Assistance Region IV: On October 11, 2012, Dr. Scott Huling (GWERD) provided
technical review comments to RPM William Turpin Ballard on documents entitled, (1) "Transmittal
of Supplemental Technical and Cost Evaluations of In Situ Chemical Oxidation and Steam Enhanced
Extraction for the Phase IIB Portion of the C-400 Interim Remedial Action at the Paducah Gaseous
Diffusion Plant, Paducah" (Sept. 14,2012), and (2) Attachment A.2 Phase II Mass Volume Estimate,
of the Revised Proposed Plan for the Volatile Organic Compound Contamination at the C-400
CleaningBuildingatthePaducahGaseousDiffusionPlant, Paducah, Kentucky (December21,2011).
It is recommended that an explanation of the relationship between the DNAPL mass estimate and
ISCO performance be included. Also, it should be noted that there are technical challenges involved
in differentiating between contaminant rebound and contaminant inflow back into the treated zone.
(13-R04-001)	(S. Huling (GWERD) 580-436-8610)
Technical Assistance Region IX: On October 15, 2012, Mr. Steven Acree (GWERD) provided
technical review comments to RPM Jere Johnson ont\\Q Initial Bedrock Characterization Activities-
Revision 7, Yerington Mine Site, Yerington, Nevada. The revised work plan is responsive to the
comments previously provided. The proposed activities appear appropriate to enhance understanding
of the hydrologic characteristics of bedrock and allow planning of more detailed investigations.
(13-R09-001)	(S. Acree (GWERD) 580-436-8609)
Technical Assistance Region IX: On October 24, 2012, Mr. Steven Acree (GWERD) provided
technical review comments to RPM Jere Johnson on the Groundwater Modeling Objectives-Revision
7, Yerington Mine Site, Yerington, Nevada. The proposed objectives appear to be appropriate to
support evaluations in the upcoming Remedial Investigation and Feasibility Study. With respect
to the time frame for the groundwater modeling effort, the current document proposes to submit
an updated hydrogeochemical conceptual model for the site within two months of approval of the
modeling objectives. It is recommended that the schedule be clarified for planning purposes.
(13-R09-001)	(S. Acree (GWERD) 580-436-8609)
Technical Assistance Region IX: On October 24,2012, Mr. Steven Acree (GWERD) and Dr. Robert
Ford (LRPCD) provided technical review comments to RPM Jere Johnson on SOP-23 Aquifer
Solids Testing-Redox Preserved Sample Preparation & Testing, Revision 7, Yerington Mine Site,
Yerington, Nevada. In general, the revised procedure adequately responds to previous comments.
However, it is recommended that a minor revision concerning sample preparation be incorporated
into the final version of the SOP to help prevent loss of material.
(13-R09-001)	(S. Acree (GWERD) 580-436-8609)
(R. Ford (LRPCD) 513-569-7501)

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HIM I! I!! in]
1r
HIGHLIGHTS
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the week of November 19, 2012
TECHNICAL ASSISTANCE
Technical Assistance Region V: On October 25,2012, Dr. Bruce Pivetz (Shaw Environmental & Infrastructure, Inc.),
under the direction of Dr. David Burden (GWERD), provided technical review comments to RPM Leah Evison on
the Draft Focused Feasibility Study for the Bavtown Groundwater Site (FFS), Washington County, MN, prepared for
the Minnesota Pollution Control Agency (MPCA) by AECOM Enviromnent. The primary concern for the site is to
find feasible approaches to treating the source zone so that the MPCA might retire the hydraulic barrier contaimnent
system, and lessen the time that GAC units have to be used to treat ground water from downgradient water supply wells.
The discussion and recommendations in the draft FFS appear appropriate, in general. However, it may be necessary
or prudent to expand the target depth interval for ISCO to include more of the vertical interval of the silty clay. It is
recommended that further validation (or modification) of the site conceptual model be periodically addressed, as new
data and information is obtained.
(12-R05-003)	(D. Burden (GWERD) 580-436-8606)
Technical Assistance RegionlV: OnNovember 8,2012, Dr. EvaDavis (GWERD) provided technical review comments
to RPM Jennifer Tufts on the 60% Remedial Design Report In Situ Source Treatment Using Deep Soil Mixing for
the Southwest Groundwater Plume Volatile Organic Compound Source at the C-747-C Oil Landfann (Solid Waste
Management Unit 1) at the Paducah Gaseous Diffusion Plant, Paducah, Kentucky, dated September 2012. The report
does not provide sufficient detail of the design or rationale for the design criteria to demonstrate that the deep soil
mixing technology using large diameter augers (LDA) can achieve the cleanup criteria for the Oil Landfann area. It
is recommended that several cells at this site be completed as a pilot scale implementation of the technology, with
extensive post-treatment data collection conducted, to demonstrate that the technology can achieve the established
cleanup criteria and operational criteria.
(12-R04-001)	(E. Davis (GWERD) 580-436-8548)
SCIENTIFIC AND TECHNICAL PUBLICATIONS
Brown, Gordon H. (Dept. of Environmental Engineering Sciences, U. of Florida, Gainesville, FL), Michael C.
Brooks, A. Lynn Wood (GWERD), Michael D. Annable (Dept. of Enviromnental Engineering Sciences, U. of Florida,
Gainesville, FL), and Junqi Huang (GWERD). 2012. Aquitard contaminant storage and flux resulting from dense
nonaqueous phase liquid source zone dissolution and remediation. Water Resources Research, Vol. 48, W06531,
doi: 10.1029/2011WR011141, 2012.
Kuder, Tomasz (School of Geology and Geophysics, U. of Oklahoma, Norman, OK), JolinT. Wilson (GWERD), Paul
Pliilp (School of Geology and Geophysics, U. of Oklahoma, Norman, OK), Y. Thomas He (National Research Council,
GWERD). 2012. Environmental Science & Technology, 46, 7495-7502.
Wilson, John T. (GWERD), Mark Toso (MN Pollution Control Agency), Doug Mackay, Nick de Sieyes (Dept. of
Land, Air & Water Resources, U. of California, Davis, CA), George E. DeVaull (Shell Global Solutions (US) Inc.,
Houston, TX). 2012. What's the Deal with Methane at LUST Spill Sites? Parti. H'STLine Bulletin 71. September
2012, pages 6-8.

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M HIGHLIGHTS /
National Risk Management Research Laboratory
Ground Water and Ecosystems Restoration Division
Robert S. Kerr Environmental Research Center
Status Report for the week of December 24, 2012


TECHNICAL ASSISTANCE
Technical Assistance Region II: On November 15, 2012, Mr. Steven Acree (GWERD), Dr. Bruce
Pivetz, and Dr. Daniel Pope (Shaw Environmental & Infrastructure, Inc.) provided technical review
comments to RPM Clifford Ng on the Groundwater Characterization Report-Well 13 Area along
Acid Brook, DuPontPompton Lakes Works, Pompton Lakes, NJ. The document describes the results
of a ground water investigation. The data obtained during the study were not sufficient to provide
a detailed characterization of ground water flow and interaction with surface water in the study
area. It is recommended that remediation goals be more clearly defined. It is also recommended
that additional characterizations of ground water flow, contaminant distributions and subsurface
geochemistry be performed.
(13RC02-001)	(S. Acree (GWERD) 580-436-8609)
Technical Assistance Region VIII: On November 20, 2012, Dr. Daniel Pope (Shaw Environmental
& Infrastructure, Inc.), under the direction of Dr. David Burden (GWERD), provided technical
review comments to RPM Sam Garcia, and Andrew Schmidt, Ground Water Forum member, on
the Natural Attenuation Evaluation for the One star Wasatch Chemical Site, Salt Lake City UT.
Four monitored natural attenuation (MNA) remedy-related documents were reviewed to determine
whether an MNA remedy is appropriate for the Site. In general, there is a lack of data on several
important contaminants and geochemical analytes. While this does not render current evaluation
of MNA impossible, it does significantly increase the uncertainty associated with understanding
natural attenuation processes at the Site.
(12-R08-001)	(D. Burden (GWERD) 580-436-8606)
SCTENTTFTC AND TECHNICAL PUBLICATIONS
Ferrey, Mark L. (MN Pollution Control Agency, St. Paul, MN), John T. Wilson, Cherri Adair,
Chunming Su (GWERD), DennisD. Fine (ShawEnvironmental Services, Inc. (GWERD)), Xuyang
Liu (National Research Council (GWERD)), and John W.Washington (U.S. EPANational Exposure
Research Laboratory, Athens, GA). 2012. Behavior and Fate of PFOAand PFOS in Sandy Aquifer
Sediment. Ground Water Monitoring & Remediation, Fall 2012, Vol. 32, Issue 4, pages 63-71.
Shen, Hai (U.S. Dept. of Energy, Los Alamos, NM), John T. Wilson (GWERD), and Xiaoxia Lu
(College of Urban and Environmental Sciences, Peking University, Beijing, China. 2012. ATracer
Test to Characterize Treatment of TCE in a Permeable Reactive Barrier. Ground Water Monitoring
& Remediation, Fall 2012, Vol. 32, Issue 4, pages 32-41.
Hutchins, S.R., M.V. White, and S.C. Mravik (GWERD). 2012. Case Studies on the Impact of
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