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TWO-MILE RADIUS SURVEY AND C-8 SAMPLING REPORT DUPONT WASHINGTON WORKS FACILITY/LOCAL LANDFILL, WEST VIRGINIA (MARCH - MAY 2002)
Date: August 2002
Project No: DEWW7423
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CORPORATE REMEDIATION GROUP An Alliance between
DuPont and URS Diamond
Barley Mill Plaza, Building 27 Wilmington, Delaware 19805
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Table of Contents
TABLE OF CONTENTS
10 IOEOQUCHO carers 20 C-8 Analyses and Analytical REPORING cosmid 3.0 Washington Works Facility/Local Landfill Two-mile Radius Survey
SUAARETI Y mses ssid 40 Resamplingof Selected Residences Located Within the One-Mile Radius........6 5.0 Results for Additional Sampling LOCRONS cvs] 60 Fh FOr ecmunmmmmmmmmmmmmmmmss----------. TH BAO nmmmmmm--------------
Table 1 Table 2 Table 3
Table 4
TABLES
Summary of Off:site Sampling Program (C- Sampling) `SummaryofC- Analytical Results in Groundwater and Surface Water (Off-site Wells, Springs, and Cisterns) Local Landfill Two-mile Radius
`Summary of C- Analytical Results in Drinking Water (Off-site Wells, Springs, and Cistems)--One-mile Radius Re-sampling at Washington Works Facility/Local, Letart, and Dry Run Landfills SummaryofAdditional C- Analytical Results in Groundwater and Surface Water
Figure]
FIGURES Washington Works Facility and Local Landfill Two-mile Radius Map
Appendix A Appendix B
APPENDIX Two-mile Radius Well Survey Results--Washington Works Facility and Local Landfill DuPont Washington Works West Virginia Miscellaneous Groundwater Samples
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Introduction
1.0 INTRODUCTION
A multi-media consent order (Order No. GWR-2001-019) was entered into between the West Virginia Department of Environmental Protection (WVDEP), the West Virginia Department of Health and Human Resources--Bureau for Public Health (WVDHHRBPH) and DuPont on November 15, 2001 (Consent Order). The Consent Order
identified a seriesof requirements and tasks to be performed by the parties (WVDEP,
'WVDHHR-BPH, and DuPont) in order to determine whether there has been any impact on human health and the environment as a result of releases ofammonium perfluorooctanoate (C-8), CAS Number 3825-26-1, to the environment from DuPont operations at the Washington Works Facility and the associated landfills (Local, Letart,
and Dry Run). The Consent Order established the C-8 Groundwater Investigation Steering Team (GIST)
10 oversee investigations and activities that will be conducted to assess the presence and extent of C-8 in drinking water, groundwater, and surface water at and around the `Washington Works Facility and the Local, Letart, and Dry Run Landfills.
Pursuant to Attachment A of the Consent Order, three tasks are being performed by DuPont and evaluated by the GIST: Tasks A, B, and C. Task A: Groundwater Use and `Well Survey/Groundwater Monitoring involves evaluating C-8 in groundwater within specific distances from the Washington Works Facility and the landfills. Task B:
Assessmentof Existing Groundwater and Surface Water Monitoring Data includes the
compilation ofhistorical C-8 data, monitoring all surface water and groundwater at the
landfills, and the development ofa Groundwater Monitoring Plan for the Washington Works Facility and the Local, Letart, and Dry Run Landfills. Task C: Plume
Identification/Groundwater Assessment will commence following the completion of Tasks A and B and involves the evaluationof the vertical and horizontal extent of C-8 impacted groundwater and specifically includes an assessment of C-8 impacted groundwater at the Letart Landfill and its impact on the Ohio River.
"This document summarizes results for activities conducted to date for Task A. Distance-
`phased groundwater well and water-use surveys within a one-mile radial distance from
the Washington Works Facility/Local Landfill, Letart and the Dry Run Landfills were completed in February 2002. (Because the Washington Works Facility and the Local Landfill are adjacent to each other, a single 1-mile radius area was developed for these two sites.) The results for the groundwater well and water-use surveys within a one-mile radial distance from the Washington Works Facility/Local Landfill, Letart and the Dry Run Landfills radius were provided to the GIST in April 2002 (DuPont, 2002a).
`Based upon the low concentrations of C-8 found in C-8 water sources sampled for the one-mile radius survey for the Letart and Dry Run Landfills, expansionofthe survey
areas around these two landfills was not required by the GIST (DuPont, 2002a). On the
`basis ofthe C-8 results for water sources sampled for the one-mile radius survey for the Washington Works Facility/Local Landfill, the GIST required expansion of that survey area to a two-mile radius to further delineate C-8 in groundwater. In addition, the GIST
required re-samplingofany drinking water sample that had a C-8 concentration above
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distanceof the Washington Works Facility/Local Landfill. Further, property owners of residences located within the one-mile radius of Washington Works Facility/Local Landfill, and the Letart and Dry Run Landfills that were identified for possible resampling were given the optionof having their drinking water sources re-sampled. This
report documents these activities. This report ii organized in the following manner:
Q Section 2 provides information on C-8 analyses and analytical reporting
Q Section 3 presents the results of the Washington Works Facility/Local Landfill
two-mile radius survey and the C-8 results for water samples collected and analyzed between March 14, 2002 and May 30, 2002.
a Section 4 provides the re-sampling results for drinking water sources within the
one-mile radius for the Washington Works Facility/Local Landfill, and the Letart
and Dry Run Landfills. Also included in Section 4 are results for samples
collected during the Local Landfill two-mile sampling event that are not located within the Local Landfill two-mile radius.
Q Section S presents the path forward.
Q Section 6 provides references.
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Two-mite Radius Survey and C-8 Sampling Report
C-8 Analyses and Analytical Reporting
2.0 C-8 ANALYSES AND ANALYTICAL REPORTING
`The Quality Assurance Project Plan (QAPP; DuPont, 2002b) discusses the procedures
and protocols developed to ensure that project information, data, and decisions derived from or based on data acquired during the groundwater investigation at Washington Works Facility and associated landfills are technically sound, usable, and properly documented. The QAPP was submitted to the GIST in January 2002. Specifically,
Sections 5, 6, and 10 present sampling protocols, sample and document custody
procedures, and internal quality control checks that were followed during the field
sampling activities associated with the groundwater well and water-use survey. The QAPP also presents information on quality assurance, calibration procedures and frequency, analytical procedures, data reduction, verification, and reporting. Information
osnumtmhaerainzaelydtibceallomw.ethod and the precision criteria used for the C-8 reporting are
In October 2001 Exygen Research, Inc. (Exygen), located in State College, Pennsylvania,
developed and tested a new analytical method that utilizes Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS). DuPont adopted this `method (LC/MS/MS) for analyzing C-8 in water in November 2001. Currently, Exygen performs all C-8 water sample analysesfor DuPont.
Exygen reports C-8 results for the laboratory replicate of each field sample. These results are evaluated for precision by comparing the field sample result to the corresponding.
laboratory replicate result: Q Ifboth results are less than the practical quantitation limit (PQL), the replicate sample for that analyte is considered to have passed the precision criteria.
Q If one or both results are between one and five times the PQL, the replicate is considered to have met the precision criteriaifthe two results differ by less than
the PQL.
Q If one result is less than the PQL and the other is not andif the two results differed by a value less than the PQL, the replicate is said to have met the acceptance criteria.
Q Finally, ifboth results are at least five times the PQL, the replicateis considered to have met the criteriaifthe relative percent difference (RPD) between the two results is less than or equal to 20%. The RPD is the absolute valueofthe.
difference of two measurements divided by their average. When the precision criteria outlined above are met, Exygen reports the averageofthe field sample and the laboratory replicate results reported. Ifcriteria for precision are. exceeded, Exygen reports the higherof the sample and laboratory replicate results.
Finally, when one result (from the sample/laboratory replicate pair) is above the PQL and one below, the result that is above the PQL is reported. C-8 results are recorded in the Corporate Environmental Database (CED) and are reported as FC-143 for consistency with historical results.
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C-8 Analyses and Analytical Reporting
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as noted in the individual review summaries. All data reported by Exygen has been
judged usable for the purposes of the project.
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Washington Works Facility/Local Landfill Two-mile Radius Survey
Summary of Results
3.0 WASHINGTON WORKS FACILITY/LOCAL LANDFILL TWO-MILE RADIUS SURVEY SUMMARY OF RESULTS
Table | summarizes the groundwater well and water-use survey for the two-mile radius around the Washington Works Facility/Local Landfill. This table provides the summarized resultsofthe survey and presents the total numberof water samples collected from wells, springs, and cisterns. It also indicates how manyofthese samples are from sources used for drinking water. Table 2 presents the analytical results for water samples collected from wells, cisterns, and springs located within the two-mile radius surrounding the Washington Works Facility/Local Landfill. For each sample listed, the sample identification, the sampling date, the C-8 concentration in ug/L, sample type, and water-use comments are provided. Figure 1 shows the location ofall samples included in Table 2. At each sampling point shown in Figure 1, the sample identification and C-8 concentration are noted. Sample identifications for water samples from cisterns or springs are indicated by (C) or (S), respectively. All other sample identifications (without notation) indicate water samples from wells. Sample identifications and C- concentrations colored blue indicate water samples that come from drinking water sources. Sample identifications and C- concentrations colored black indicate water samples that come from non-drinking water sources. Appendix A provides the groundwater well and water-use survey result for the two-mile radius and includes details such as the following
Q Name Q Address or physical description Q Phone number Q Date and time of water sample collection, ifcollected Q Typeof sample 9 Water use Q Sample identification
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Re-sampling of Selected Residences Located Within the One-Mile Radius
4.0 RE-SAMPLING OF SELECTED RESIDENCES LOCATED
WITHIN THE ONE-MILE RADIUS
Residents located within the one-mile radius of Washington Works Facility/Local Landfill and the one-mile radius ofthe Letart and Dry Run Landfills with drinking water sources having C-8 concentrations above the PQL, were given the optionofhaving their drinking water sources re-sampled. Initially, re-sampling was to be conducted for two months. However, based on the C-8 screening level developed by the C- Assessment of Toxicity team for drinking water (ic., 150 ug/L), the GIST determined that only one additional re-sampling event was required (GIST meeting May, 15, 2002). Six residential owners within the Washington Works Facility/Local Landfill one-mile radius were given the optionofhaving their drinking water sources re-sampled. Two property owners declined this option. The other four-property owner's wells were resampled. Table 3 provides the re-sampling results. The location of these samples and the C8 concentrations measured at these locations are also shown in Figure 1 For the Dry Run Landfill one-mile radius, eight residents were given the option having their water source re-sampled, and five declined. For the Letart Landfill one-mile radius, one resident was given the option having the water source re-sampled, but he declined Table 3 provides the information on the re-samplingofdrinking water sources located. within the one-mile radius near the Dry Run and Letart Landfills that had C-8 concentrations greater than the PQL. (Survey results for these locations were provided in Appendix Aof the One-mile Radius Survey and C-8 Sampling Report and Ohio River Public Water Supply Sampling document issued to the GIST in April 2002)
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Locations
5.0 RESULTS FOR ADDITIONAL SAMPLING LOCATIONS
"Table 4 presents C-8 results for water sources sampled during the Washington Works
Facility/Local Landfill two-mile
two-mile radius, were not partof
radius sampling
the re-sampling
event that
activities,
were not located within the
or were in the survey area but
were collected later in the program. The samples in Table 4 are discussed below.
(OS-COWANJW is a sample collected from the Cowan property located within the Washington Works Facility/Local Landfill one-mile radius. This sample locatioin s
shown in Figure 1. The survey form from this property owner was received in the mail
safatmeprltehde atswop-amrtiloefrtahdeiutswos-ammiplleisnagmhpaldincgomevmeenntc.ed; therefore, the unused well was
(0S-WIGALCA is a sample collected from a well used for non-drinking water purposes.
The well is located off of RT. 68, at the first house southof the Dry Run Landfill one-
mile radius. This sample was collected becauseofits proximity to the one-mile radius
line.
MAEPCF] is a sample collected from the combined flowof multiple wells at
iMsouusnetdaifnoeremraAnmyerpuircpaonseElsecitnrcilcudPionwgedrr,inlkociantgewdaitnerN.eTwhHeawvaetne,rWweasstsVaimrgpilneida.aftTehrethweater chlorine treatment unit and was sampled at the request of the WVDEP.
(0S-ATKINSON]J3 is a non-drinking water sample from a spring behind the bam at the Atkinson residence located near Pine Run immediately westof the Dry Run Landfill onemile radius. This water source was sampled at the request of WVDEP.
OS-WRIGHTLE is a water sample from an unused well. This well is located off of RT. 68, slightly south ofthe Dry Run Landfill one-mile radius. This water source was
sampled at the request of WVDEP.
(0S-GRAHAMCT
samples (C1, C2,
through
and C3)
3 were
include
sampled at
a drinking
the request
water well,
of the WVDEP. These three
a non-drinking water spring, and
a sample from Lee Creek (used for non-drinking water purposes), respectively. These
three sampling points are located a few miles outside the Dry Run Landfill one-mile
radius along Lee Creek. These water sources were sampled at the request of WVDEP.
Q Name Appendix B provides the groundwater well and water-use survey results for the two-mile
radius and includes details such as the following:
Q Address or physical description
Q Phone number
Q Date and timeofwater sample collection,ifcollected
Q Typeof sample.
Q Wateruse
Q Sample identification
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Twomie Radius Suey and C-3 Sampling Repert
Path Forward
6.0 PATH FORWARD
Offsite residential sampling for the Washington Works Facility/Local Landfill, and the Letart and Dry Run Landfills is finished. With the issuing ofthis report, Task A Groundwater Use and Well Survey/Groundwater Monitoringof the Consent Order is essentially complete. The remaining path forward for this task is the quality assurance review. As indicated in Section 2.0, independent quality assurance reviewofdata packages is an ongoing activity. It is anticipated that additional data packages for the two-mile radius samples will be submitted to the validator. Resultsof the ongoing quality assurance will be summarized in a future report. Another possible path forward for Task A might be documentingto the GIST any final results for additional water samples collected after this report has been issued. Collecting additional water samples is not anticipated at this time. However, itis possible that `groundwater survey forms may be received at some time in the future from individuals residing within the two-mile radius that had not previously responded to the survey (as was the case with the one-mile radius survey). If this situation arises, the GIST will determine on a case-by-case basisif samplingofthese water sources is required.
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Tu mle Radius Survey and C8 Sampling Report
References
7.0 REFERENCES
DuPont. 2002a. One-Mile Radius Survey and C-8 Sampling Report and Ohio River Public Water Supply Sampling, DuPont Washington Works (December 2001 -- February 2002), January 2002. DuPont Corporate Remediation Group and URS Diamond.
. 2002. January 2002 Groundwater Investigation Quality Assurance Project Plan for Washington Works Plant Washington, WV, January 2002. DuPont Corporate Remediation Group and URS Diamond.
USEPA. 1994. Region Ill Modifications to National Functional Guidelines for Organic Data Review.
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FIGURES 000335
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000386
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000387
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000339
APPENDICES 000390
000391
APPENDIX A
TWO-MILE RADIUS WELL SURVEY RESULTS--
WASHINGTON WORKS FACILITY AND LOCAL LANDFILL
000392
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000397
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000398
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000426
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000427
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000428
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EE
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Fr r er fe mm m f= r o wrf pperp a fop r o----e ----||
r Frrabmp
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000429 i
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000430
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Revs man
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000434
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|
[ eef ee r oo tpeo e|
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000435
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000436
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000433
on
000439
APPENDIX B DUPONT WASHINGTON WORKS WEST VIRGINIA
MISCELLANEOUS GROUNDWATER SAMPLES
000420
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5 Lal: Ls Lala 2 22 GTI REIES BIRSEEECED ET | 3 E50E
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3
