Document gbBxbGKaxyB0rbZgojxN95M3J

f AR226-2522 AMMONIUM PERFLUOROOCTANOATE 1r' (C-8) r groundwater i investigation steering >" iIII TEAMREPORT L L' AUGUST 2 0 0 3 GW-2001-0191 Consent Order No. \ Final C-8 GIST Report .... ..... ............................ Table of Contents: Executive Summary.................. ................ - ..................... 3 introduction ........................ .................. ................. ....... 11 West Virginia Private Water Supply Sources............;. - 13 Ohio Private Water Supply Sources ...................... . 19 West Virginia Public W ater Supply Sources ..................22 Ohio Public Water Supply S o u rce s.......... .................... 25 Ohio River Sampling ........ ..............- - ........................... 28 Surface Water and Groundwater M onitoring.................. 30 Groundwater M odeling....................................... References ....................................................... Appendixes A: Site maps and Groundwater-Top maps B: Groundwater Data C: Consent Order No. GW-2001-019 Contact: Groundwater Program Division of Water and Waste Management 414 Summers Street Charleston, West Virginia 25301 304-558-2108 Members of the Groundwater investigation Steering Team: Don Criss, Geologist, Groundwater Program, West Virginia DEP Garth Conner, Environmental Engineer, Enforcement Division, Region III, United States EPA George R. Dasher, Geologist, Groundwater Program, West Virginia DEP Andrew Harden, Principal Project Leader, DuPont Engineering Jack C. Hwang, Hydrogeologist, Region III, United States EPA Bill Toomey, Program Manager, Source Water Protection, Bureau for Public Health, West Virginia Health and Human Resources Roger Reinhart, Environmental Engineer, Water Division, Region III, United States EPA Dee Ann Staats, Ph.D., Science Advisor, West Virginia DEP Dave Watkins, Program Manager, Regulatory Programs Section, West Virginia DEP Non-Voting GIST team members: Sarah Wallace, Environmental Engineer, Division of Drinking and Ground Waters, Southeast District Office, Ohio EPA Steve Williams, Hydrogeologist, Division of Drinking and Ground Waters, Southeast District Office, Ohio EPA Division o f Water and Waste Management AMMONIUM PERFLUOROOCTANOATE (C-8) GROUNDWATER INVESTIGATION STEERING TEAM REPORT EXECUTIVE SUMMARY A multi-media Consent Order (GWR-20Q1-019) was entered into between the West Virginia Department of Environmental Protection (VW DEP),tte Department of Health and Human Resources-Bureau for Public Health (WVDHHRBPH) and DuPont on November 14th, 2001. The Consent Order identified a series of requirements to be performed by the Parties (WVDEP WVDHHR-BPH, and DuPont) in order to determine whether there has been anv impact on human health and the environment as a result of releases of ammonlm perfluorooctanoate (C-8), CAS Number 3815-26-1 to the envrronmentfrom DuPont operations at the Washington Works main plant and thrM asaoortedtand /lo ca l Drv Run and Letart). C-8 is a material used by DuPont in its fluoroproducts manufacturing process at its Washington Works Facility's located in Washington, Wood County W esfVirgk^a. C-8 has not been identified as a hazardous substance hazardous waste, or otherwise specifically regulated under West Virginia or federal statute or regulation. In accordance with Attachment A of the Consent Order, three tasks were to be performed by DuPont and evaluated by the Groundwater Investigation Steering Team (GIST). The GIST used a phased approach towards meeting these requirements. Task A: Task A required Dupont to conduct a distance-phased public water supply service survey along the Ohio River on both the West Virginia and Ohio sides of the river Subsequent to the Task A requirement, a one-mile (and possibly a two- and three-mile) radial distance of the Washington Works Facility and the Local, Letart, and Dry Run Landfills. The phased approach to the water and groundwater wn ue and sampling was intended to allow the GIST to focus efforts along potential C-8 impact transport pathways and eventually cease activities in directions where impacts were not present or where there were low concentrations. Division o f Water and Waste Management Final C-8 GIST Report ___ ____ ____ _ W IST Virginia Private Water Supply Sources: Conclusions: page 4 water sources. . Private water sources within a one- to Snrartrattons deteded in the one- to two-mile radius sampling area. was 10,4 pg/l. Recommendations: asM gK ^==?,, SSSmUSSSJSi1 2 5 . S . a sampling should then be re-evaluated. Ohio Private W ater S upply Sources: Conclusions: sources sampled. Private water sources within a o n e to two-mile Works Facility were sampled based on the levels of C-8 detected at the outer limits of the one-mile radius. No private water sources in Ohio were found to exceed the C-8 drinking water screening level of 150 pg/l. The highest concentration detected was 23.6 pg . Recommendations: . Continued quarterly sampling of selected water sources aroundIthe Washington Works Facility for one year is recommended by the 0h 0 *=TM* ^bsequ*ently!the frequency of the sampling should then be re-evaluated. D ivision o f W ater and Waste Management Final C-8 GIST Report pages ) w est Virginia Public Water Supply Systems: ; Conclusions: Ten oublic water supply systems along the Ohio River at various points up and ; downstream from the Washington Works Facility and Letart Landfill were sampled for I C-8. . No public water supply production wells in West Virginia were found to exceed the drinking water screening level of 150 pg/l. The highest concentratio detected was 1.87 pg/l. * The widespread distribution and low concentrations of C-8 indicate that the Drimarv migration pathways to the public water supplies are air emissions from the Washington Works Facility and pumping-induced in filtra tio n S i River, which receives C-8 from the National Poliutant [Discharge System (NPDES) outfalls at the Washington Works Facility and the Letart Landfill. Recommendations: * Continued quarterly sampling at the Lubeck Public Service District (PSD), DuPont Washington Works Facility, and General Electric pubhc water systems for two years is Fecommended by the GIST. Also, annual samphng^of the Blennerhassett Island, Mason County PSD, and the of I Public Water System for two years is advised. Subsequently, the frequency ot the sampling should then be re-evaluated. Ohio Public Water Supply Systems: Conclusions: qiy oublic water supply production wells along the Ohio River at various points up andSdownstream from the Washington Works Facility and the Letart Landfill were sampled for C-8. . No public water supply production wells In Ohio were found to exceed the C-8 drinking water screening level of 150 pg/l. The highest concentration detected was 8.58 pg/l. * The widespread distribution and the low concentrations of C-8 indicate that the primary migration pathways to the public water suppliesare he Washington Works Facility and pumping-induced infiltration from the Ohio R iv e n ^ c h receives C-8 from NPDES outfalls at the Washington Works Faddy and Letart Landfill. D ivision o f W ater and Waste Management Final C-8 GIST Report mm Recommends tions: * Continued quarterly sampling of the Little Hocking Water Association Public Water System for two years is recommended by the GIST. Also, annual sampling of the Tuppers Plains-Chester Water District Public Water System for two years is advised. Subsequently, the frequency of the sampling should then be re-evaluated. Task B: Task B required the development and implementation of a monitoring plan that would determine the extent and presence of C-8 in drinking water, groundwater, and surface water in and around the Washington Works Facility and the three landfills, and to provide a compilation of all available groundwater/surface water monitoring and hydrogeologic characterization data for each facility. Ohio River Surface Water Sampling: Conclusions: * Twelve sampling locations in the Ohio River at points up to 28.6 miles upstream of the Washington Works Facility and downstream to the Letart Landfill were sampled for C-8. . No samples collected from the Ohio River were found to exceed the C-8 drinking water screening level of 150 pg/l. The highest concentration detected was 1.04 pg/l. Recommendations: * No additional river sampling is recommended. Surface Water and Groundwater Monitoring: This task included monitoring of the surface water and groundwater at the Washington Works Facility and the three landfills for four consecutive monthly events, followed by quarterly sampling thereafter. Dry Run landfill: Conclusions: * C-8 is believed to be migrating, via groundwater and surface water, from the C* 8-containing waste that has been disposed of within the landfill. D ivision o f Water and Waste Management Final C-8 GIST Report . Groundwater flow is toward the west and toward the Dry Run valley at this site . c-8 concentrations measured within the one-mHe radius of the site show that some off-site migration of C-8 may have occurred. * The Dry Run Landfill is located within eight miles of the Washington Works Parilitv The transport of C-8 via air emissions from the plant could potentially be me s l o e of concentrations of C-8 detected within the one-mrle radius sampling area. * There are no known complete exposure pathways for human receptors that exceed the C-8 drinking water screening level of 150 pg/l. Recommendations: * Surface water and groundwater monitoring should continue at this site. The should continue to be quarterly, ^ can be either monthly or quarterly, as required by the site s NPDES permit. * The C-8 concentrations in wells DRMW-13A and DRMW-13A should be monitored, as these wells appear to be the most vulnerable (down-gradient portion of the C-8 plume). . The C-8 concentrations at the Dry Run leachate discharge location should be monitored. LiTART Landfill: Conclusions: C-8 is believed to be migrating via surface water transport from the C-8 containing waste that has been disposed of within the landfill. Groundwater flow in the A Zone, D-E Zones, C Zone, and F Zone at the Letart Landfill is towards the Ohio River, and is away from the private water supplies in this area Groundwater flow in the F Zone (the deepest zone) is generally believed to be towards the Ohio River and away from the private water supplies ^tW s area; howe\^r, there may be a groundwater flow divide on the upper and northwestern side of the landfill. The annual C-8 loading from groundwater to the Ohio River indicates a very i In the river from the landfill, and this Is supported by t e very low concentrations of C-8 in the Ohio River downstream of the landfill. It is possible, however, that this loading is contnbutmg to the presence of low C-8 concentrations in some of the down river community water systems. . Air emissions are not a viable migration pathway from the landfill because there D ivision o f W ater and Waste Management Pinal C-8 GIST Report are no air emissions at the Letart Landfill, page 6 sSiii^ equipment also limits C-8 exposure for the on-site workers. Recommendations: sss 5, direction. . Zone F groundwater wells LMW-2A and LMW-12 should be monitored tor C-8 mnoentrations and groundwater flow direction. Local Landfill: Conclusions: -- r ix a s r ia s - * " Facility. . r a detected within the one- and two-mile radius sampling areas near the W a t h W o T C r Facility and Local Landfill Is likely to have been transported from the plant via air emissions. J S the " e l s m e n l 1E S S * t JS m S & W water screening level of 150 pg/i- Recommendations: D ivision o f W ater and Waste Management Final C-8 GIST Report jgga i l Surface wafer and groundwater monitoring should continue atThissite^ The groundwater sampling should continue to be semi-annually, while the sampling can be either monthly or quarterly, as required by the site s NPDES permit. . Three locations at the Local Landfill should be monitored: Outlet 101, Outlet LM1, and well LLMW-4. W ashington w orks Facility: Conclusions: The on-site Solid Waste Management Units (SWMUs) are believed to be the primary source of C-8 migration into the groundwater. Air deposition of C-8 onto the ground surface and its subsequent migration into the groundwater may also have occurred. No off-site migration of the groundwater is occurring, as long as DuPont's Western Well Field continues pumping. . * Some limited groundwater may migrate off-site in the northwest com erof the DuPont facility in response to the GE plant pumping their wells #3 and #4. Air emissions are believed to be the primary migration pathway of C-8 from the Washington Works Facility to adjacent areas in Ohio. . Air emissions of C-8 from the Washington Works Facility^are believed to be the source of C-8 detected in areas of West Virginia located adjacent to the facility and the Local Landfill. Air emissions of C-8 and the discharge of C-8 through the outfalls are believed to be the migration pathways of C-8 from the facility to the Ohio River, a n d most likely--from the river to the public water supplies located downstream. Air emissions of C-8 from the plant are believed to be the source for C-8 along the Ohio River upstream of the plant. . There are no known complete exposure pathways for human receptors that exceed the CATT-established C-8 drinking water screening level of 150 pg/l at the Washington Works Facility. Recommendations: . Surface water and groundwater monitoring should continue at this site. The groundwater sampling should continue to be quarterly, while the outfall samp mg can be either monthly or quarterly, as required by the site's NPDES permit. D ivision o f Water and Waste Management Final C-8 GIST Report pagelO . The following groundwater monitoring wells p I w - QCM monitoring at the Washington Works F a d ty. W *-M W 2, P04 " ' MW02 VO5-PW01, NO4-MW-01, and Outfall 005, tRhievseer. DuPont has stated (in their February 2003 Summary Kepori) uw i ^ v to a perched aquifer and that the deeper aquifer contains no C-8. Task C: Task r renuired the determination of the vertical and horizontal extent of any and all C-8impacted groundwater exceeding 1 pg/l. This tesk ateo indude anassessmen of C-8 impacted surface water and/or groundwater at the U M U a M and its mnpaci on the Ohio River and nearby public water systems along the river. Groundwater m odeling* nroundwater modeling of the Washington Works Facility and surrounding area was conducted to evaluate the groundwater flow pathways and determine the potential of C-8 migration to off-site receptors. Conclusions: . The Ohio River creates a groundwater divide in the Pleistocene a to iu m under river As a result of production-well pumping at the Dupont Washington Works Facility and the neighboring GE facility, the C-8-impi from the Washington Works Facility is not being PSD municipal well field in West Virginia or the Little Hocking Water Assoc well field in Ohio. Some limited groundwater may migrate o ^srte in th e northwest corner of the DuPont facility in response to GE pumping wells #3 and Sources of C-8, for the Lubeok PSD and the Little Hocking Water Association, are coming from the Ohio River and dispersion by a . Recommendation: . The URS Diamond model should be accepted as conditions In determining groundwater flow and contaminant transport. D ivision o f W ater and Waste Management Final C-B GIST Report INTRODUCTION page 11 C 8 has bean used by DuPont ^ manufacturing processes. R e s i u " t o n Works Facility are or have been released manufacturingprocess.at t h e a n d otherwise disposal. DuPont also captures for recycling a portion of used C-8. No permits issued to Dupon, authorizing released p o l l contain specific limitations on the a m o u n t ^ t o sampling to detect the as 1990, DuPont has performed regular, , . in vvest Virginia, and has reported considered the likely source. . . The federal Environmental for BPH determined that it was desirable t _ rf waters in the area of these persons potentially exposed to gro.U^ d/^ f lHR BpH reqUested that DuPont submit all facilities. The EPA, WVDEP, and Qf QQ ^ gnd around information and documents re,ofog to Q |d bePof great importance to have S K ^ S u ^ K ~ e ^ p o te n t exposure risk of the presence of C-8 in the environment. Therefore a C-8 Groundwater Investigation Steering would be established In the Consent Order to oversee conducted to assess the presence and extent of C-8 n dmtang groundwater, and surface water at and around the mam plant, and the Local, Dry Kun, an Landfills. Thf>riS T was made up of a team of scientists assembled from the WVDEP, WVDHHR-BPHL e K . Regional, and DuPont ,he f f i f f l S S l guidelines fir Ohio ERA'S partdpatlon In the GIST dueto the discovery of C-8 in Ohio public drinking water supplies. sampling of private wells was contingent upo through the Consent Order was D ivision o f Water and Waste Management Final n-8 GIST Report or three-mile radius of the Washington Works Facility and the three landfills. page 12 Historical data and hydrogeologic information was evaluated in order to prioritize the initial scope of work for continuing groundwater monitoring and 3ny ^ddlf'0^ (e.g. monitoring well installations) required under Task C Plume Identification. i Joon conclusion of the Tasks set forth in the Consent Order, the GIST was charged^fih^reparing a Anal report with findings and Recommendations of the GIST in fulfillment of the Consent Order. . Division o f Water and Waste Management Final -8 GIST Report page 13 WEST VIRGINIA PRIVATE WATER SUPPLY SOURCES Pursuant to Attachment A of the Consent Order, the Groundwater Use and Well Surveyinvolved evaluating C-8 In groundwater initially within a' ne-mile iradiuii fro Washington Works Facility and the three la n d ^ 0.mlle results obtained from the one-mile radius survey and sampling. Retween March 2002 and October 2002, DuPont's third-party contractor, Potesta Associates Inc performed a door-to-door well survey and collected sarnplesioHowmg protwolsfestablished by the multi-media consent order. " e8 VWDEP and the Wood County Health Department accompanied Potesta Associates, Inc. personnel during the initial door-to-door survey. Washington Works Facility and Local Landfill; In April 2002, DuPont submitted a report to the GIST documenting the v ^ ll L h r RL m n ie results within a one-mile radial distance around the DuPont w S n g to n W o rk s Facility and the Local Landfill. Because of the priwlmity ofthe I-ocal Landfill to the DuPont Washington Works Facility, groundwater wells loca e , combined one-mile radius (of both sites) in West Virginia were sampled. A total of 44 samples were collected from drinking water wells, non-drinking water wells, unuse wells, springs, and cisterns. The C-8 concentration from drinking water wells ranged from 0.328 pg/l to 2.8 iia/i The highest concentration of C-8 from the category of non-drinkmg water wells and unused wells was 14.3 pg/l. C-8 was detected in all wells, springs, and cisterns samoled within the one-mile radius, A total of two samples collected in the one-mile ra^us1?ad con(ntratk>ris of C-8 above) pg/l. Because of the levels^ound,i the onemile radius of the Washington Works Facility and the Local Landfill,.he P ^aje w a te suddIv sources survey was extended by the GIST to a two-mile radius. In addrt * nrivate and industrial water supplies used for drinking water were sampled on a monthly basis until the CATT drinking water screening concentration of 150 pg/l was develops . The orivate water supply sources survey and C-8 sampling results within the_ one- Jtw o-m iie radius of the DuPont Washington Works Facility and the local landflH were submitted on August 2002 to the GIST. A total of 85 samples were collected and analyzed for C-8 including drinking water wells. The C-8 concentrations measured in drinking water wells ranged from non-detect (<0.010 pg/l) to 0.889 pg/l. The bigi es concentration of C-8 from non-drinking water wells or unused wells was 1-57 pg/l. A sorinq sample, used for drinking water, had a concentration of 1.8 pg/l. Due to measured concentrations of C-8 in the two-mile radius indicating a decreasing trend in distance from the Washington Works Facility, the GIST determined that additional samples beyond the two-mile radius were not necessary. Division o f W ater and Waste Management Final -8 GIST Report page 14 ,In summa- ry, rC-a8 wwaass ddeetteecctteedd iinn 100% and 79% of the nectivelv. p-prihveatceowncaetenrtrsautipopnlsy of sources sampled in the one-and two- ,, ^Amnared to the one-mile radius. No C-8 were lower In the two-nrile rad,us am " areaZ S Z L the ^ S S ^ d S " c r e e " e , of ISC^ ~ p r e a d distribution of C-8 In private water supply " " " ^ o ^ c n ^ n d the Local Landfill the facility toadjacentareas inWest Virginia. recommendations: c a re s s : tt " t S E s r is s r - - groundwater are the r e s u l t ^ additional couple of years. J fnaTMna'selective locations to evaluate the current trend of C-8 X n ^ Addibona, samples should be collected from the following sample locations, with the owner's permission. * Drinking water wells with detected levels of C-8, * Drinking water springs with detected levels of C-8, * Non-drinking water wells with detected levelsof C 8, * Springs and cisterns with detected levels of C-8, and * Wells or springs used for cattle above 5 pg/l (total 1). more The from eGaIcShTcraetceogmormy,efnodrsqusealretecrtilnygsatemnpolinf gthefosreone y . frequency of the sampling should then be re-evaluated. q' L etart Landfill: In April 2002 DuPont submitted a report to the GIST documenting the well _ AUto ^(o r3 0 sa m p le s*\^e e^ H w te i^ o m ^ ^ k ^ ^ t^ r^ e l|s ^ ^ n ^ n fd n ^ w a te rT v e |ls , ^ S s S ra S a S S r Division o f W ater and Waste Management Pinal C-8 GIST Report page 15 In summary 0 8 was detected in 6% of the private water supply sources Recommendations: water supplies within a one-mile radius of the Letart Landfill. o!l39 S b e resampled The resident refused to have the well resampled. Each location has thus been sampled a single time, and there is no clear trend as to rro g recommending ^a^DuPord^tem'yeadiTsamples S f Em^ sampling frequency should then be reevaluated. D ry R un L a n d f il l * Anril 9nn9 niJpont submitted a report to the GIST documenting the well survey and C-8 sampling results within th e,'S irm V rW n ^ w tte ^ lte no'n-drinklng water wells ranged from non-detect (<0.01 pg/l) to 0. * * b an| unused wells S 8M ug/i1' Dut tThetow 1X t f C - S found aUhe Dry Run U ndflll, the private water suppi^survejTwas m>t extended by the GIST to a two-mlle radial area. In summary C-8 was detected in 60% of the private water supply samples to the lack of groundwater flow into these areas. recommendations: Under the Consent Order, a significant number of private water supply samples Division of W ater and Waste Management Pinal C-8 GIST Report have been collected that d o c u m e n tth e ^ ^ u n ^ a T d V l00 ^ unknown whether the concentrations. The criteria to select repeat sample locations, wun u permission, may include. * Drinking water wells with detectable levels of C-8, * Drinking water springs with detectab e levels of C-8, and * Springs and cisterns with detectable levels of C-8. T. \AA/nHHR BPH and WVDEP recommend selecting ten, with at least one or S ^ ^ is s s s s s a s a s s s s - s s s s s s s s s ^ S S iS . Drinking W ater Wells Non-drinking / Unused Wells 28 Springs and Cisterns -1 0 Division o f Water and Waste Management . Concentration of C-8 (pg/i> Final C-8 GIST Report summary of C-8 Results In Private Water Supply Systems* ll' e uiachlM ton Works Facility and Local Landfill <2 Mile Ra us) ft Division o f W ater and Waste Management Concentration of C-8 (pgrt) Final C-8 GIST Report page 18 Summary of C-8 Results in Private Water Supply Systems at the Dry Run Landfill (1 Mile Radius) re a. o? o <= 0 .5 I O 0 Drinking W a te r W ells - 1 6 N on-drinking / U nused W ells - 2 6 Springs and C isterns - Division o f Water and Waste Management Final C-8 GIST Report ............. _ ....... .-- -- - -- -- -- page 19 OHIO PRIVATE WATER SUPPLY SOURCES Ac a result of C-8 being detected in the Little Hocking Public Water Supply December 2001, Ohio EPA and DuPont in addition waW u?dVS o y andC-8 a?mpli'ng9irto Ohio within a one.mile ,he L J S S K s . Inc,'s personnel during the initial door-to-door well sun/ey. In August 2002, DuPont submitted a report to the GIST and Ohio ERA Hnr,imentina the well survey and C-8 sample results within the one-mile radial area^ A f o ^ r f 69 sa m ^T w e re collected from drinking water wells, toiai ot . / i . a .u tems The C-8 concentrations measured for drinking wate^welb ranged from non detect (<0 01 pg/l) to r S g S i l '^ sD iinosantfcisterns sampled within the one-mile radius, including a concentration of Works Facility. The private water supply survey and C-8 sampling within the one- to two-mile Hil,_ of the faciiitv were completed in September of 2002. The results were collected^nd 2 ^ S f u S M S , ' & h'ighes. -- tio n o ,^ wells or unused wells was 8.68 pg/l. One spring sampled for C-8 had a concent auon of 3.02 pg/l. Overall, no concentrations of C-8 were detected above 10 pg one- to two-mile radius. In summary, C-8 was detected in approximately 94% and 77% of the private water supply samples collected in the one- and two-mile areas, respectively. In general, he concentrations of C-8 are lower In the two-mile radius area ~ dS e d ?he one-mile radius. Because measured concentrations in the two-rmle a decreasing trend in distance from the Washington Works Facility, the Ohio EPA ana DuPont determined that additional sampling beyond the two-mile radius was not necessary No private water supply samples in the one- or two-m,le radius exceeded D ivision o f W ater and Waste Management Final C-8 GIST Report the CATT-established C-8 drinking water PHTM Washington Works Facility to adjacent areas in Ohio. page 20 " f M " " recommendations: m thA nhio EPA DuPont has collected a significant number of At the request of the OhioE , document the extent and current private water supply samples in Ohio that ^ terns within two miles of their concentration of C-8 Washington Works Facility. once, and it is currently sources are unclear as to whether the concentrt n |ast couple of years, reflective of historic air emissions or ons the Ohio EPA recommends that categories of private water sources: . Drinking water wells with detectable levels of C-8, Drinking water spring with detectable levels of C-8 . Non-drinking water wells with detectable eve * f C-8, and * Springs and cisterns with detectable levels of C-8. The Ohio EPA recommends select!ingat s '^ ^ e n t lj! tte by the Ohio EPA and DuPont. Ohio 1 Mile Radius o f C 8 pg/i) Division of Water and Waste Management Final 0 8 GIST Report 25 ; ' ' 20 ' Ohio 2 Mile Radius Concentrations of C8 (pg/l) Drinking Water Wells - 50 Non-drinking / Unused W ells * 9 Springs and Cisterns - 4 V { i i Division o f Water and Waste Management Final C8 GIST Report ______ page 22 WEST VIRGINIA PUBLIC WATER SUPPLY SOURCES Public Water Supply Sources (PWSSs) inW est were sampled at various. ^ C o n s e n t Order Initial sampling of PWSSs within ann1 Works Facility pursuant to the ConsL . December 2001. findings: . Public Water System River Miles from Washington Works Parkersburg Water Department Blennerhassett Island State Park DuPont Washington Works Facility General Electric 1.5 Lubeck PSD 4.5 Bellville Hydro Electric Recreation Ravenswood Municipal Water Works Mason County PSD--Letart 14 31 45 Sampling Dates Well Field Results (C-8 pg/1) Mar and Apr 2002 Jan 2002 Well #1:0.0686 to 0.0746 Well #2: ND Well #3: ND Well #4: ND Well #5: ND Well #1:0.165 Jan 2002 Mar 2003 Jan, Feb, and Apr 2002 Jan 2002 to Feb 2003 Jan 2002 AM07-P.W01: NQ to 0.335 A008-PW01: 0.308 to 0.499 AX13-PW01: 0.721 to 1.42 Well #3:1.75 to 1.87 Well A: 0.683 to 0.938 Well B: 0.443 to 0.61 WellC: 0.398 to 0.592 Well D: 0.397 to 0.758 Well E: 0.332 to 1.21 Well F: 0.283 to 1.04 Not tested Mar 2002 Jan, Mar, and Apr 2002 Well #1: ND Well #2: ND Well #3: ND Well #4: ND Well #5: ND Well #1 : NQ Well #2:0.0618 to 0.0838 Well #3:0.063 to 0.102 ' vision o f W ater and Waste Management Final C-8 GIST Report page 23 Racine Locks and Darr^ New Haven Water Department Jan 2002 Not tested Well #1: NQ 0.518 A negative stream mile value refers a location '" * * ^ * positive number refers to a r| taor below the laboratory's minimum detection limit. " ND 'H e try Instrument and time; however, me Non Detect coneenlmton for C-8 for this period of time is 0.01 P9/l- . . th laboratory's minimum detection for this period of time is 0.05 pg/l. ' Upon completion of the C-8 Assessment of establishing a drinkingwate^screemng ^re^o Department, Blennerhassett f f CHXe^Pa'rk B^M a Hydro Electric Recreation Plant, Ravenswood Municipal. Island State Park ^ I v d i e My ^ Dam , and New Haven W ater Mason low concentraOons. Sampling was continued at and Lubeck PSD on a guarteriy basis to continue to evaluate trends in C-8 concentrations. Conclusions.* The completion of the groundwater studies and sampling efforts performed as a part of the C-8 G IS T study have resulted in the following conclusions regar i g source of C-8 in the W est Virginia PW SSs: that the C -8 levels ar p transported in air emissions and deposited on " * S t o bfnSSS S S K S & - - * * * tra"sprtto surface and/or groundwater. . . . x r,or>. it e hoiieveri that the C-8 levels are transported via air ; S o " : r 9S w a f e " o & Solid W aste Management Units at the Washington W or s aci ity. in > . Genera! Electric: It is believed that the C-8 levels am 1^ S T S a S S i S discharges from the DuPont Washington Works Facility. lm,~ , , K / d q d - It 1 halieved that the C-8 levels are associated with pumping-induced re c h lrg irt surface water from the DuPont Washmgton Works Facillt/s wastewater discharges to the Ohio River and possibly via air deposition. Division o f W ater and Waste Management Final C-8 GIST Report page 24 Mason County PSD--Letart: it is believed that the C-8 levels are derived from ( pumping-induced recharge of surface water from DuPont Washington Works Facility s wastewater discharges to the Ohio River, , Racine Locks and Dam: It is believed that the C-8 levels are derived by pumpinginduced recharge of surface water from the DuPont Washington Works Facility and/or the Letart Landfill leachate discharges to the Ohio River. recommendations: Considering this data, it is the GIST'S recommendation that DuPont continue the following for the PWSSs: Lubeck PSD, DuPont Washington Works Facility, and General Electric: Quarterly sampling of wells for two years to ensure that C-8 levels are being maintained or reduced Conduct a limited field investigation to determine the extent and concentration of C-8 in soil at the Lubeck PSD in the vicinity of their production wells. When the soil sample results are available and the data is evaluated, the GIST will determine what additional sampling activities are necessary to complete the investigation. DuPont will submit a report documenting the sampling investigation and the C-8 results to the GIST when the results are finalized. After two years, the sampling program will be re-evaluated, * Blennerhassett Island State Park and Mason County PSD--Letart: Annual sampling for a two-year period to ensure C-8 levels are being maintained or reduced. After two years, the sampling program will be re-evaluated. . Racine Lock and Dam: Annual sampling for a two-year period to evaluate levels of C-8 due to the upstream proximity of the Letart Landfill, and to ensure that C-8 levels are being maintained or reduced. After two years, the sampling program will be re evaluated. * Parkersburg Water Department, Bellville Hydro Electric Recreation Plant, Ravenswood Municipal Water Works, and New Haven Water Department: No further action is deemed necessary at this time. Division of W ater and Waste Management Pinal c-8 GIST Report OHIO PUBLIC WATER SUPPLY SOURCES Task A Of the GIST Team Objectives and sampling of the public field for the Little Hocking Water In December, 2001. The samp ing monitoring allowed the GIST o exp . was sampled for C-f and subsequent of monitoring to include public water Washington Works Facility. ScomberTone Februaiy 2003 have resulted in the Public Water System River Miles from Washington Works Sampling Dates Dec 2001 Little Hocking Jan, Feb, Mar, Apr, Water 0.5 Aug, and Oct 2002 Association Feb 2003 City of Belpre 4.6 Feb, Mar, and Apr 2002 Well Field Results (C-8 pg/l) Well # 1 :1.82 to 3.65 Well #2: 2.07 to 4.26 Weil #3: 0.42 to 0.952 Well #5: 5,69 to 8.58 Distribution System Results (C-8 fjg/l) 1.82 to 4.29 Well #1:0.0995 to 0.13 Well #2; NQ Well #3; 0.12 to 0.141 Well #4:0.101 to 0.133 Well #5: 0.103 to 0.111 0.081 to 0.12 Toppers Plains/ Chester Water District Village of Racine Village of 14.15 51.15 56.9 Feb, Mar, Apr, Jut, and Oct 2002 Feb 2003 Mar 2002 Mar and Apr 2002 Well #1: 0.486 to 0.726 Well #2: 0.235 to 0.417 Well #3: ND to NQ Weil #4: ND to 0.076 Well #5: 0.201 to 0.297 Well #6:0.433 to 0.649 Well#1: ND Well #2: ND Well #3: ND North Well: 0.208-0.491 South Well: ND 0.24 to 0.363 ND ND Village of Pomeroy Well #1: ND 56.9 Mar and Apr 2002 Well #2: ND to 0.06 0.063 to 0.066 Well #4: 0.071 to 0.085 * N f% % t ^ ' S S S k S X i ' b y instrument and time; however, the Non Detect concentration ^ S S S Sfor C-8 for this period of time is 0 0 ^ | ; . th t is be!ow the laboratory's minimum detection ^ , S S ^ i h e . N o t Q u a n M ableconcentrabonforC^ fnr this Deriod of time is 0.05 pg/i. Division ofW ater and Waste Management Final C-B GIST Report Upon completion of he CAT7 study PS/lfor C-8 was established, page 26 ' quar,eriyy C-8 concentration trends. Conclusions: The completion o, the S-- -g S X i" ^ * 2 C o n ta m in a tio n in Ohio public water systems: " . u ,m H o c m : MaMy air P " from discharges to the Ohio River may have also contributed. . Be/pre: Air deposition from Washington Works Facilit/s stack discharges. . Tappers P lains: Pumping-induced Washington Works Facility wastewater discharges to the Ohio Rive . * Village of Racine: No discernible contamination. frc ^ ^ e ^ W a s h b ^ o ^ ^ ^ k r F ^ lity and/oAheTetert L a n d filfte ^h a te d ^h ^a rg e s^th e Ohio River. Considering the public water system.data and, continued reductionof C-8 is advised_At th . o or Pomeroy. After two years, necessary for the Villages of Belpre, Racine, Syracuse, or rom ivy the sampling frequency will be re-evaluated. LITTLE HOCKING WATER ASSOCIATION WELL FIELD INVESTIGATION: in addition to sampling Little Hocking Wate' DuPont has periodically sampled ten *s t]on of c ,8 s less than 2 pg/l in D ivisn'o f W ater and Waste Management Final C-8 GIST Report ,, (March 2002). 28.7 pg/l (April . i n , nh in p p a DuPont conducted a field investigation in the At the request of the F je ld between August 19th and AUgUst 30 , little Hocking W ater 2002. The purpose of this investigation was the extent and concentration Groundwater sample of C-8 in soil and groundwater in the wc Y . non eteci (<o.oi pg/l) to 78.0 results collected during h ^ ^ t r a t io n detected in soil from the well field is 170 pg/| of C-8. The highest C; 8 was submitted by DuPont pg/kg. A repod^" nbng evaluation of this report is ^ P o n t will determine what additional activities are necessary to compete the investigation. D ivision o f W ater and Waste Management OHIO RIVER SAMPLING Ohio River sampling activities river transects Tnd S S and m S ^ e deaths were sampled at many of the locations. The most distant river to determine _ and 46 miles downstream from the collected adjacent to and below the DuPont background levels of C-8. Samp es wer ^ ^ The final part of the river :x rn " ,odetermine* concen,rations present there. Atthe end of the Ohio River sampling, 49 water samples were taken. w,t following results: Depths ,Q dip and mid-column dip and mid-column dip, mid-column, and bottom dip, mid-column, and bottom Washington Works Plant outfalls dip, mid-column, and bottom dip, mid-column, and bottom dip, mid-column, and bottom dip and mid-column dip and mid-column dip and mid-column dip and mid-column Letart Landfilll dip and mid-column smDle. l T t f W t e r and Waste Management Pinal 0 8 GIST Report page 29 CONCLUSIONS: Ho river sample exceeded the CATT-established 0 8 drinking water screening I f 150 yq/j for any of the Ohio River samples. No additional river sampling is thus Z a C o f S cornent Order, however, sampling should continue as part of the Washlnon Worte Facility and Letart Landfill NPDES outfall montonng. Division of Water and Waste Management Final 0 8 GIST Report SURFACE WATER AND GROUNDWATER MONITORING page 30 It should be noted that site location maps, top-of-groundwater maps, and site geological maps are located in Appendix A, and that a complete set of groundwater data (in both table and graph form) is located in Appendix B. These data included with this final GIST report ends with the March 2003 sampling. The hydrological information is from the February 2003 Summary Report. It should also be noted that the data displayed here (both historical and recent) have been generated using several different analytical methods. Prior to .1991, DuPont performed the 0 8 analysis at the DuPont Experimental Station in Wilmington, Delaware In 1991, when the Resource Conservation and Recovery Act (RCRA) Verification Investigation was conducted at the Washington Works plant, the analysis was contracted to the CH2MHill Laboratory in Montgomery, Alabama Both of these laboratories used .a Gas Chromatography-Electron Capture Detected-based analytical methods with detection limits for C-8 that ranged from 0.1 to 1.0 pg/l, CH2MHil! conducted the C-8 analysis into the fall of 1998 when the laboratory ceased operation. At that time, th analytical work was transferred to Lancaster Laboratories, in Lancaster, Pennsylvania. DuPont continued to use this facility until October 2001, when development and testing was completed on a new analytical method utilized by Exygen Research, Inc., located in State College, Pennsylvania. This method uses a Liquid Chromatography-Tandem Mass Spectrometry. DuPont adopted the regular use of this method in November of 2001. Historical Work: Before any assessment could be made of the groundwater and surface water at the four DuPont locations, a summary of the historical data was compiled. This was submitted by DuPont in January of 2002 in the document, Compilation of Historical C-8 Data, DuPont Washington Works Facility, Main Plant, and Landfills. This report included a brief historical, geological, and hydrogeological overview of the four sites (Washington Works Facility, Local Landfill, Dry Run Landfill, and Letart Landfill), and identified three data gaps: the need for additional groundwater monitoring wells, continued refinement of the groundwater model at the main plant, and the need to evaluate the Ohio River surface water. This report also included location maps for the four sites, multiple geological cross-sections, four top-of-groundwater maps for each facility, and construction details for the groundwater monitoring wells. Many of the locations were sampled only once, however, samples had been collected from other locations on as many as 17 occasions. The information submitted on the four sites' historical sampling locations was as follows: Division of W ater and Waste Management Final C"8 GIST Report Facility Washington Works Local Landfill Dry Run Landfill Letart Landfill Outfalls Sampled 2 6 1 2 Other Surface Water Locations Sampled 2 2 5 6 Groundwater Monitoring Wells Sampled 62 ' 4 9 Zone A: 3 ZoneB: 0 Zone C: 1 Zone D-E: 3 Zone:F: 4 On-Site Drinking Water Locations Sampled 4 0 0 0 Facility Washington Works Local Landfill Dry Run Landfill Letart Landfill n g mwberoftocations and occasions: Wafer Type .......... ------------ -4-4 Maximum Maximum Number of Number of Sample points occasions Surface Groundwater . Surface Groundwater Zone A Groundwater Zone B Groundwater Zone C Groundwater Zone D Surface Groundwater Zone A Groundwater Zone B Groundwater Zone C Surface Groundwater Zone A Groundwater Zone B Groundwater Zone C 6 20 6 4 1 3 1 8 3 12 1 6 .3 0 - -1 26 19 23 13 2 2 2 22 18 18 2 25 21 0 10 Division o f W ater and Waste Management Final C.8 GIST Report wells were added in August of 2002, These new wells, first sampled In ? jX " L l1 d 1 d e X n r M 0-- four sites. SuTont er plumes migrating from any of the results and Conclusions: Dry Run Landfill: The Dry Run LandfflJiskrcatedwestTd the 41'18" West Longitude. Ohio S S S S fig e"6 T h " ^ n L a n d f r ll began operation In 1986, and the central portion Division of WatFand Waste Management Final C-B GIST Report page 33 still active and operates under W rffP D E Sd aTM v e r ^ w f t s o il and vegetative Closed and is covered by an engineered- landfill cap. The Dry Run Landfill is about 17 acres ini size and is TM wide and 1500 feet long, with southeast and northwest d'recbon n Dry Run. Physically, the site 99 situated on) the small valley s nat ^ in an old, v-shaped valley above s| of f|)| material surrounded (and oil The site borders no highways, waste sludge materials from an he main plant) was placed in the upper, southeastern side of the landfill. ' Geologically .he "S p e n c e S 'S shale, silty clay, and sa" dston^ " l t ,, * " i ,,8. These have been labeled by aquifers are nearly " [ " ^ i S b 2002 groundwater monitoring re p o rt-a s Zone A, wells screened within it, and Zone C has y The Zone A g ^ n d w a te r hows 0.055 vertical feet per horizontal foot. T h e z down the axis of Dry Run. between 25 and 35 feet thick, Run valley. in depth from between 220 feet deep under me breached by the Dry Run few feet below th e aurfa" ':ihpe,'n^ ` AV o f le welte surroundlng Zone B were surface stream northw e^offlre aa^ J jjs^ ^g ^w n -g ra d ie n t western part of the X lU o n ta ln e d detectable the Division of Water and Waste Management Final C-8 G IS T R e p o r t ____ _____ _ DRMW-13A is less than in well DRMW-13; however, it does seem to indicate that Zone B's plume is also moving directly down the Dry Run valley. As stated previously, Zone C is the d e e p e s to f^ c This zone is only penetrated by one been is located approximately 120 feet ^e ow _ landfill. Zone C is at least 45 determined if it extends to the southea feet thick, and may be confined as the 9TMJ0d surface in the well extended above jn the October 2002 the well's screen and the top of the san ' ? impossible at this time to sampling. Without f d ^ n ^ Well determine the zone s extent or the gr ,, * c _8 on occasions it was Dry Ru onno it n aicn difficult to make statements regarding the during much of 2002. It is also di . , concentrations vary so much from concentrations of C-8 found to date ^ ^ h^ S a t o n o f C-8 found at the sample location to P^D rv Run leachate location, where the concentrations of surface sampling points is the Dry December of 2001. The leachate is not discharge into Dry Run. A further breakdown of the Dry Run Landfill sampling data is as follows: Dry Run Land 1Surfacii water; [unn&dcrHW Sample Point Outlet Outlet 001 003 Outlet 004 Property Boundary Number of samples 15 3 2- 12 MinimumC-8 17 8.77 0.7 0.88 Maximum C-8 88.5 25.3 158 39 AV&fasJtf `-''P 58 57 17.39 79^35 11.3 Stream #1 11 0.54 1.63 1.07 Stream #2 11 4.6 87 40.29 Dry Run Leachate 12 27.4 704 205.59 Pond Under Drain 8 29.3 99.7 50.98___ u* y rvw* *-'" ' Sample Point DRMW-12 Number of samples 13 Minimum C-8 <0.1 Maximum C-8 0.134 Average C-8 0 .0 8 ___ DRMW-13 12 3.6 20.9 12.16 DRMW-15 10 0.25 5.0 3-74 Division of W a te rand Waste Management page 35 F in al C-8 G IS T R epo! No D e te c t c o n c e n tr a tio n of `<0.1" w a s c a lc u la te d a s z e r o . Note: For the purposes of averaging these values, a Dry Run Landfill Groundwater lo n e B: (units are pg/l) Sample Point DRMW-16B DRMW-17B DRMW-18B Number of samples Minimum C-8 2 <0.1 1 0.155 1 <0.1 Maximum C-8 <0.1 0.155 <0.1 Avaraae C-8 ... <0.1 ------ DRMW-19B <0.1 <0.1 <0.1 DRMW-20B <0.1 <0.1 <0.1 DRMW-21A 0.138 .27 0.204 Dry Run Landfill Groundwater Zone C: (units are ijgA) Sample Point DRMW-21B Number of samples 2 Minimum C-8 <0.1 . Maximum C-8 <0.1 Average C-8 < 0 . 1 __ L it a r t L a n d f il l ; The Letart Landfill Is located Letart in northern Mason County. It North Latitude and 81` 55' 43" Washington Works Facility, situated on the dissected West Longitude. The and shales of the Dunkard Appalachian Plateau. Bedrock cons sts of me sanosto is heIe flowing by installing an engineered multl-layer of Water and Waste Management Final C~8 GIST Report _______ -- -- ------- ------ geosynthetic end soil cap in 2001. The permit monitoring, surface water monitoring, and cap maintenance. Physically, the Letart Landfill Is page 36 0 TM "dwater ' s : s S r - residents and businesses along this section of the highway. -- Geologically, the bedrocR beneath the shale, silty clay, and sandstone and s 'tstone. Th ' h h9 been labeled by they are counted, between four and Zone A is the DuPont as Zone A, Zone B ,2on.^' .. d by thre'e groundwater monitoring wells, shallowest of these ' " S s onty one well. Zone D-E contains five ^ n r ,r -- w e t and Z o n e ^ th e de/pest and dominant aguifer at this site, has nine wells screened through it. shale, sandstone, and siltstone tens. ?h?aeppearahoa " a"north*groundwater flow and a plume that centered on well LMW-1, the centraPmost of the three wells. Of the three Zone A wells, LMW-1 has the h i g h e s t aj |h Well 8 in these wells since October 1999 between 158 and 587 pg/l. down the landfill toward the river, Division of Water and Waste Management Final 0 8 GIST Report, LMW-3, is located near the very River. This well had a concentration of 2,270 pg/i ^ 01,11 page 37 ^ Zone D-E is the most complex of appear to be combined in the southern,TM nt ' d DOSSibly central portion of the are separated by a shale layer in e _ completely missing in the northern and landfill It is also possibleThatZoneD between 10 and northeastern portions of the site. October 2002, has a gradient of 0.026 v e S > e X ee?hodz^TaHoot witir a groundwater flow direction to the south-southwest. There are five groundwater of these wells are located near the s o ^ ^ O f ^ j or (hre6 of the wells. LMW-4 concentrations of C-8. These concentrations have ranged from 172 to 2,840 pg/l. All five of the Zone D-E plume S 2 S S S * wal l s, located just east of LMW-4 contained much lower concentrations of C-8. AS previously stated, groundwater Zone F s W aved |o be at the Letart Landfill. This zone." T O ^ S ^ f l m u i h i U i i within the zone flows feet per horizontal foot. . There are X e 2002. and positioned all around tbe landfil. Six of th project a possible C-8 plume seven were sampled in 0ct ^ f0/ . f The |owest concentrations are to the west moving south down the center of tbe . jn we[| LMW-14B. The of the landfill, where there is one concentrt we|| LMW-5B, which has highest C * concentration is at the yep,Toe o the | L" ore ,ha'n B decade - " 692 and 2'280 pg/l. Zone F well LMW-2A contains high o o w J J ^ S S t iis T o o a t e d on Prirate water source (GERWCH,BA) north of the Letart Landfill where a small concentration of C-8 was found. Division of Water and Waste Management Final C-S GIST Report page 38 I, should be noted that, due tothe " a" d T n ^ ^ ^ contribution to the groundwater flow h a s ,nBd sable Less groundwater volume b rs : " a t i o n : " X Z C-8 has b S *. H SSSSS concentrations as high as 3,240 and 415.6 pg/l, respec ivey. " * -. A detailed breakdown of the surface and groundwater data is as follows: 1rtnrf 1 aniifH) Surface Water: (units are pg/l) . Sample Point Outlet 002 Outlet Stormwater 003 RunOff Number of samples Minimum C-8 Maximum C-8 18 4;52 3240 6 0.06 0.239 1 50.9 50.9 Averaae C-8 899.22 0.21 -- ----------Route 33 Stream 13. 0.57 3.92 1.96 Brinker Run 2 0.06 0.247 0.154 Cap Runoff 6 65.1 415 225.18 Letart Landfill Zone A Groundwater; (units are pg/l) Sample Point Number of samples LMW-1 21 LMW-7 20 LMW-8 20 Minimum C-8 Maximum C-8 Averaoe C-8 60 30,500 14.696.57 0.1 567 233.57 280 4020 2499 Letart Landfill C Zone Groundwater; (units are pg/l) Sample Point DRMW-3 Number of samples 8 Minimum C-8 <0.1 Maximum C-8 2270 Division of Water and Waste Management No Detect concentration of "<0.1" was Note: For the purposes of averaging these values, a calculated as zero. , 1 anrifiii D-E Zones Groundwater*, (units are fjg/l)__------------- Qamnlft Point Mumher o f samples Minimum C -8 Maximum C -8 Averacte C -8 LMW -3A 10 60.3 380 170.39 LMW -4 12 172 3060 1577.83 LM W -5A 8 0.8 ' 112 71.43 LM W -13A 2 144 510 327 LMW -14A 2 498 974 736 .Le.tar.t u. a_n_auiim e nvm. --undwater: (units are PQ) Sample Point LM W 2A MW SB LMW -6 LM W -9 Num ber o f samples Minimum C-8 Maximum C -8 Averaae 0 8 23 50 990 496.8 22 340 2280 1161.9 12 9.4 30 17.49 9 0.2 0.91 0.65 ___ __ LMW10 LMW11 58 0.126 0.058 0.298 Q.1 0.159 n nn LM W 12 0 LM W 13B ____ w- LMW14B 22 0.09 70.4 0.149 105 0.1223 87.7 L o c a l L a n d f il l : The Local Landfill Is located f in northwestern central Wood County- ?.n3g, ig - w est Longitude. It Is situated on located at 39' 15' 54" North Latitude and 81 3 1 1 6 West L o w ^ the dissected Appalachian Plateau,con f , 19g4 nt0 the 1980s, and were approximately two feet of low permeability sofland t o d i s t a ^ ^ X i s ^ t t o r t i l e landfrll and located between the landfill and DuPont's Washington Works Facility. * pfcin. r.,,,,Inoicallv. the bedrock beneath the landfill Is comprised of individual layers of 1 -------- (i ( Di vj sj on of W ater and Waste Management * Fuinna il C-8 GwI?ST Rgeo r --t _--_-------- - ' " Pa^e ^0 f shale, silty clay, and sandstone and ^ o o m p feeK T n d tto ae and which are continuous under theoveirail site, ^a" 2002 groundwater monitoring slltstone. DuPont has named these (m their October | 9 Zone D Zone a report), from shallowest to deepest, Zone A, Zone a , on , believed to be the dominant aquifer. Zone A is usually between 10 to ^ ^ U h ic k , and erC)Ped by an to 110 feet. This zone is continuous across t s ^ gnd then flows to the unnamed stream that flows ou 0 . . t0 tbe north-northwest with a gradient of northwest. Groundwater flow in Zone A g four groundwater monitoring wells 0.008 vertical feet per horizontal fo o t istent|y contained C-8 concentrations that screened in Zone A. Two of ths *?f6 has contained C-8 concentrations below 10 are below 1 pg/l. A thW ^ M ^ S S r a llo n s up to 79 pg/l. This K ' t h a t t Zona A C-8 plume is moving north toward LLMW-4. * * Zone B is generally 5 to incised by the unnamed surface strea , well screened in this zone, and has y There isPonly one 9 )ed ^ c e . it contained a C-8 _ . g No p etect concentration in March of r 0n03e w ftorS y 0one65w lli9no'"plume information or groundwater flow and gradient data can be generated on this groundwater zone. Zone C ,s 10 ,o 2 0 feetthick, and 90 to . ^ m p ^ 'tw ^ 'a n d ^ r^ ^ o n M *S o n s^ an g ed *ro n io .3 17 to 6.61 pg/l. Zone D is more than 12 feet *h*ck"o n tL e n ^ 'a m p le iw c e ^ ith hto Detect has been screenec' ^ " astons W th onV one well, no plume Information or " " oow"abndgS f d a t a can be generated for Zone D. Six sampling locations are of C-8 with the highest Landfill. All of these o i and Outlet LM1. These concentrations ranged concentrations occurring at , rv 2003 and dropped to 45.4 pg/l m March from 38 pg/l in June 2002 to 7 2 ,pg/l i n .^ 2003. Outlet LM1's concentrations are higher, iney ^ and 8 1 .7 pg/l on the two occasions this location was sampled. Th* i coat Landfill data can be further broken down as follows: p ^ i n of Water and Waste Management i*H mat C-8 GIST R eport pI ag*e ~41 Local Landfill Surface Water: (lin ts are fjgA) I New 005 3' 9.51 34.3 19.94 Outlet 101 19 12 115 57.1 Outlet LM1 100.85 Landfill Zone A Groundwater: (units are pgty LGorcoaulnLdawnadtfeirll: Zone (units 3 are pg/l) Sample Point LLMW-12B N u m b er of samples 2 Minimum C-8 Maximum C-8__ _ Average C-8 __ <0.1 0.0658 0.0329 values, a No Detect concentration of "<0.1" was Note: For the purposes of averaging these calculated as zero. 1r n ,iI nnriflllZ o n e CGroundwater:( u n its * * * g/i) Sample Point Number of samples LLMW-11A 2 LLMW-13B 2 LLMW-14B 2 Minimum C-8 Maximum C-8 Average C-8 2.05 2.22 2.135 6.38 6.61 6.495 . 0.317 0.488 0.4025 Division of Water and Waste Management Fnsi C-8 GIST Report Local Landfill Zone I) Groundwater: (units are pgA) Sample Point LLMW-11B Number of samples 2 Minimum C-8 <0.1 Maximum C-8 <0.1 Averaae C-8 <0.1 _ W a s h in g t o n W o r k s F a c il it y . ' c o u p o n , W a s h i n g t o n ,, community of Washington Parkersburg. The facihty .s located a 39 3" North Latitude and 81* 40' 34" West The flood p|a|n here is c o m p e d Longitude, and is sited on the Ohi river sediments (alluvium) overlying the of Pleistocene glacial outorash a!ld ^ 'oceediments are comprised of sand and gravel, silt bedrock of the Dunkard Group. somewhat rural area. State Route 892 is pianlproperty. The Ohio River is located immediately to the north of the property. | AE11-MW01 I AM07-PW01 | A008-PW01 AX1o-rVVUI ------ -- D08-MW01 N04-MW01 E13-MW01 N13-MW01 K16-PW01 P04-MW2 i nd-PWOI P08-MW01 4 = = "-- --=-- " ' Q04-MW02 RO4-MW02 V05-PW01 Y14-MW01 AJ06-MW02 N04-MW03 Y14-MW02 ............. -- J ' Of these wells, five h a v e C - 8 concentrations have been less than 20 pg/l- Three 0 f these welfs (P o8-M W 01)-- when last fourth well. N04-MW01, has only been sampled once, but this concentration was 689 pg/l. - S B '-- has 46.600, 7,720. and 322.000 pg/l of C-8. respectively. ' A, present, * outlets are used to monitor the discharges at the Washington - ~ r - c r r r ~ f \a/ ^ a n d W a s te M a n a g e m e n t Final 0 8 GIST Report ___-- -- -------- Works Facility. With ai few page 43 A further breakdown of the Washington Works Facility discharge water and groundwater data is as follows. Washington Works Facility Surface Water, ftm/fe are pgW -------- " " " " Sample Point r _Outlet 001 Number of samples 16 Minimum C-8 2.15 Maximum 0 8 51.4 14.39__ rOsu.Mtfa*nll n0n0o2 25 0.118 8.54 3.21___ Outlet O0O0Z3 16 0.175 7.13 1.544 Outfall 005 26 1.43 915 81.15 Outlet 007 16 <0.1 8.56 1.42 Outlet 105 16 3.69 54.9 14.43 l'taii'Mtlnt&ri a ZfO. Washington Works Facility Groundwater: these values, a No Detect concentration of "<0.1" was Note: For the purposes of averaging calculated as zero. futfchinnton Works Facility Groundwater: (units are pgA) Sample Point K16PW01 L04PW01 N04MW01 N13MW01 Number of samples 11 13 13 Minimum0 8 0.46 0.20 689 <0.1 hAavimnm C-S Averaas C-8 _ 17.2 11.3 40.9 15.01 689 57.8 29.13 - .. -- P04MW2 11 8300 46600 28545 P08MW01 4 20.7 120 55.02 . .. Q04MW02 10 32.2 7720 1780 Note: For rha purposes o. a v a r a thasa valoas, a No Detect conceoWon ol -< 0 .f was calculated as zero. D M ii^ T o f Water and Waste Management Final C-8 GIST Report recommendations: The first priority at each of ^ la m D ltn to n h e graundwaterrhould continue to be as required by each site's individual NPDES permit. a at th * Washinaton Works Facility is believed to be The continuing source of C-8 at the W 9 d from the 0|d River Bank originating from a previously reclairned 9 . Facility Investigation, which is Landfill. Currently, the facility GIST that any action addressing these C-8 sources, it s _ sources be deferred to the relative to the investigation or remediation of ^ 0 W<5EPA-WVDEP RCRA Corrective Action Program (CAP). Division of Water and Waste Management F in al C-8 GIST Report g r o u n d w a t e r m o d e l in g Page 45 Groundwater modelingi o f ,, '^ a s h t a g ^ completed Independently by'D uP ont^Ra" aond,M odeling was completed using States Geological Survey (USGST UR mTMe, was comp|eted using Visual Modflow s o r B o t f m ^ e " b a s e d on similar calibration data and boundary condrtrons. The USGS groundwater adjacent bedrock aquifers, wherea this seepage. Preliminary ana ys groundwater flow directions, calibrat S The model data models show close agreement in heaqs and rate and volume of groundwater ' the y o g Diamond groundwater m of a target modeling (OEMS). < a - * " " " Health " The URS Diamond model boundary was the /g f^ s ^ s ^ URS Diamond model domain was 5 . . g we',,8 were included in the simulation. In columns, and 3 cells models ^ major gap in the data occurred due to the beginning stages The data gap was eliminated by a great lack of data concerning river ^ compiled by the Army Corps of abundance of new data the model domain. Engineers for construction projects at the eastern enu Geology: The alluvium was found to be aquffersTn^he model domains 15 feet deep in the center oThe nveijva were mostly unconfined, with some local y by Holocene overbank deposits ^ qJ , under|ain by predominately These alluvial aquifers Group. The Ohio River horizontally bedded sandstone ejstocene alluvium under the river. This - Typically, the permeability ^ g tg jj1Jf cfunkard*mudstones wfth^sorneTM*^ aquifers were primarily co j!"ed*:? bedrock aquifers ranged from 0.5 to 5 feet per day. minor limestone. Permeability f the . wereq33o feet per day for coarse alluvium, 30 Hydraulic conductivity used in h e , X k r fine alluvium. Hydraulic feet per day for reworked alluv.urm and o e TM aquifers on conductivity for of 200 feet per day. The normal Blennerhassett Island had a M rau' c n hydraulic head of the Ohio pool level of 582 feet above sea level was used tor tne nyu. River. Division of Water and Waste Management Final C-8 GIST Report, M o d el C alibratio n: A total of 50 industrial pub .page 46 domain are: * DuPontWashington Works Facility (WV). Blennerhassett Island State Park (WV). GE Facility (WV): Lubeck (WV) PSD: City of Belpre (OH): 13 wells 12 wells 14 wells 6 wells 1 well (Note: Belpre has five pumping wells; their total flow was assigned to one well for the model.) tittle Hocking (OH) Water Well Field 4 wells /wells PW-1, PW-2, and PW-3 were included in the model. Although well PW-5 was included, no pumping was simulated) -s u e inches per year and, as them odeterfo conductivity catibrations betten Diffe n ^ ^ ^ figures arose from different th 9 ( under the Ohio River. V S l" y ^ adjacent sediments. Sensitivity analysis was run on three most ^h ^un ce rta in ^a sso cia te d S m e S e l was in me vaiue assigned to the re-worked Pleistocene alluvium under the Ohio River. C onclusio ns: SS Diamond model. S S S " - " 1- - " > Division of Water and Waste Management Final C-8 GIST Report page 47 divide under the river, along with the GE Facility wells that draw down a c o n e o fd e p ^ . drawn jnt0 either ub eck groundwater from the W ashington Work y unrkino Water Association well PSD municipal well field in West Virginia, or the Little Hock ng^Water Assoc field in Ohio. Some limited nd Sources of 0-8 In the from the Ohio River and dispersion by air. Reco m m endatio n: . transport. r . rrs s Division of Water and Waste Management Final n.R GIST R e p o rt REFERENCES _ _ . anH H erbert P . woodward, 1968 Geological Map of West Virginia, CardWe West W g in ia ^ S g ic a l^ d Economic Survey, 1968. Parkersburg, West Virginia, January 7,2000. co% a^ Rr 2002. w S C0Ip0S ^ ^ 7 JJ-l ^ h in n f TM West Virginia, January 2002. . Virginia, tidiiucuj -- we" w s" * jani,av . andLemDryRun Wes* . * _ ,, A,,ianCe between DuPont and URS Diamond, Proposed Groundwater C0^ S ,^ T f o f w Z J n Worte F * . * * 2002. Run Landfills, Wasningion, w TM '-- ------- ! URS Diamond, January 2002 Surfat'f i Works Facility and Local, Letart, and Dry _ Run Landfills, April 2002. Worts (December 20 0 1 -February 2002), April 2002. cwi" ^ , Run Landfills, May 2002. . Run Landfills, May 2002. Corporate and p v i i ^ f W a t e r and Waste Management F in a l C8 G IS T R e p o r t , ------ _ _ ------- -- --' Landfills, Washington Works, West Virginia, June 2002. SS S Ohio, June 2002. page 49 - PrnnOSed Coua,y- Landfills, July 2002. Two-Mil,,,, ,, rt MRS Diamond Radius Survey (March to May 2002), August 2002. onn? Surface . Wasningion. West Virginia, August 2002. Washington; West Virginia, September2002. Corporate Remediation ^ ,W a .O c to 0 e r2 0 0 , Corporate R e m e io n Pacll'ity'and Local, Letart. ^^ c^ rc.t i s : K S " Corp7 ,? w S ^ S .o a o u iS 03: Washington, West Virginia, January 2003. C^y Run Landfills, February 2003. ^^ wafer Mormvimy . -- - Washington, West Virginia, March 2003. corpora,, R e n d o n Sroup. an a n c . uPon, nd HRS P,aTMod. Sampling ln.es,V a and Waste Management Final C-8 GIST Report Results Lille Hocking Water Association well Field, Washington County Onto, April 2003. 50 Washington, West Virginia, April 2003. DuPoril Corporate Remediation Group, i~ancllil1 Hyokogeotogicel Evaluatlon' DuPont Washington Works, Letart, West Virginia, July 1993. DuPont Engineering, Public Water Supply Results, West Virginia and OWo, DuPont Washington Works, Washington, West Virginia, July 31,2002. DoPon, Engineering, 0 2 and40o2 M Water Supply *- Du 1/pash/ngion tVorics, Washington, IW , November20,2002, a" d ^ ^ O'Neill, Colleen M,, -OB Health Level Established," InDEPlh. June 2002, page 4. Tatra Tech Richardson. Inc., Monitoring Wei Instellotlon Frogtew, October 1989. ' Tetra Tech Richardson, inc., Monitoring Well Installation Program ai Letart Landfill, Summary Report, August 1990. . . t n uirrmmontal Protection Final Ammonium Perfluorooctanoate (C8) August 2002. An air rotary drilling rig installing a new groundwater monitoring well at the Letart Landfill. Division of W ater a n d Waste M a n a g e m e n t Pinal C-8 GIST Report APPENDIX A: Site Maps Topographic Maps Plan Views Groundwater-Top Maps Site Cross-Sections Division of Water and Waste Management Final C-8 GIST Report page^SO Results, Little Hocking Water Association Well Field, Washington County Ohio, April 2003, Corporate Remediation Group, an Alliance between DuPont and URS Diamond, February 2003, Surface Water Monitoring Report for Washington Works Facility and Local, Letart, and Dry Run Landfills, Washington, West Virginia, April 2003. DuPont Corporate Remediation Group, Letart Landfill Hydrogeological Evaluation, DuPont Washington Works, Letart, West Virginia, July 1993. DuPont Engineering, Public Water Supply Results, West Virginia and Ohio, DuPont Washington Works, Washington, West Virginia, July 31,2002. DuPont Engineering, 3Q02 and 4Qo2 Public Water Supply Results, West Virginia and Ohio, DuPont Washington Works, Washington, WV, November 20,2002. O 'Neill, Colleen M., "C-8 Health Level Established," InDEPth, June 2002, page 4. Tetra Tech Richardson, Inc., Monitoring Well Installation Program, October 1989. Tetra Tech Richardson, Inc., Monitoring Well Installation Program at Letart Landfill, Summary Report, August 1990. West Virginia Department of Environmental Protection, Final Ammonium Perfluorooctanoate (C8) Assessment of Toxicity Team (GATT) Report, August 2002, W est Virginia Department of Environmental Protection and the West Virginia Division of Health and Human Resources, Consent Order Issued Pursuant to Articles 5 and 12, Chapter 22 and Article 1, Chapter 16, of the West Virginia Code, November 14,2001. An air rotary drilling rig installing a new groundwater monitoring well at the Letart Landfill. Division of Water and Waste Management Final C-8 GIST Report APPENDIX A: Site Maps Topographic Maps Plan Views Groundwater-Top Maps Site Cross-Sections Division of Water and Waste Management L__ETART _l a n _d f il_l V-.w- 1 WASHINGTON WORKS FACILITY/ . `O " LOCAL LANDFILL . i. >vie; l /DRY RON LANDFILL <*** . ja . %. - , S l o c l L r i - . . ] T Ailclbto f <JACh>riiille. : k A>Jvllle,-,'--,' ~k7:LiJnYj\^ V\' !.} ... HTS"W'1M--SWr _ j. . \ n k FlAli i . I |S b v *|Jl, ' ** I ^ X JS5 ArdB:'* Figure 1.0: Index map for the four Dupont sites. 6~/\V.4 ' -^i!i . _.*X "` ^ f -3- Figure 2.0: Location map for the Dry Hun Landfill Figure 2.1: Dry Run Landifll with sampling points. I : i: r ?-. Sill LC L L L L r i c r. [ L t: iL [ Figure 2.4: Dry Run Geological Cross-Section B-B\ i L Northwest A 9 5. cSutht i ** I KO r ? $ S j i. Figure 2.5: Dry Run Geological Cross-Section A-C. North D -,9 5 0 /"! 900-i: .//.... 0 <g$SB> Gerpc*#t*h South B* oso 000 000* *KO 0 roO 0-' iLtea cf;. '-itCf`fi.ltt>Ci>triV,MALt- t tvr; :*>) *SAMK*'Oyl iE'i.&!iSlI -, ';VlU. -;mt. >.*./r<<i 3 n sue* ;^ir Vuir.:i- Figure 2.6: Dry Run Geological Cross-Section D-B' ' : si ! ' mM i li'* )1 LETART LAHDFIU. perimeter '"N,,^ t. C* . * Carperai*gwMffteft R Figure 3.0: Letart Landfill Location Map. lI;! --i-Ljlj;: Figure 3,1; Letart Landfill Location Map Close-Up. ,^ ijt ^ T-vU 11su.J A K-*1'*; ftAit-i *4-- j 1 AAC?fcn WWAAtfcVrt AHO | tcior.dioup j `*c'' .... ,r /* ^ . -..V-*, i C>A ! r i L ECENft ---_-*_<n_.T?iS<yAMCAD'ti'Olt'it EOiOUK(vC*v^tCA9lWH.SLCtVDAS)jtOi ftOtsr^itc^ scale CKOSS-SECUO _^ Corptrf.tsHwtgaw Croup LMOfltWVI.cloft tonar* ----- j **. siNuliStthwWnl. ICO SADii *&/***<*. NO*Lf uFteiceg?u&*re 3.5: Letart" - * ' < Landfill* ' *" '*.... Geological Cro-.s...s..-,,Sec.t.ion BB-DB, DNorth South UO`* p; ... . v , {vCSOHtaa>L*VU}KJU 1Lv*--..."..11 *-'40 w-1' -'* <** *<*- ^^h >00 5=5 ;3&y-- ..... -- is, .... Figure*:3..6v*:*ULetaa*Rr<ttinLjr.'a>n9dfill-G***eological Cross-Section D-D'. i I f 1. [ L r i; Li: i. {n> I I L ! *% 0C/ON- 2TO( MURt MGAWPJU-NO-WtoAgtEaK_ jy V- - a *cnl mnixm all. t v ...... c ,'UMi: IKJNIID V"U J, m *-. M..M i* U AfCNZflHVtCHN0llQi*.e-*1M1U - Cpwt* RMWkm ; MJmn4e*>4**|i*3**A**w*n**w* I loten vundifli S^ Lean. Vinal 'WiqHiio Ll Figure 3.8: Letart Landfill Zone' ,.v* i* CmIyCoKtv#A**#U5K0iOA*HU. CoOohWi*O*-HUL*rtFU*i<NCk'*fc*t'* rwfB>t*r}qitB"w. f*ieitn*5Ma tfnS* ' D-E Top-of-Groundwater Map. L I [ i L i; c ! LL i L S. iI 5 4 A . . . S.-WAC " * M * H i . Figure 4.1: Local Landfill with Sampling Points. V. Vi. ' I i ' '% \* ' w v f W 'V ' ; i M / r ; f ` t i> ; : - ^ A \ I L: .Vs -; ' ..-i: Figure 4.2: Local Landfill Geological Cross-Section Lines. Figure 4,4: Local Landfill Geological Cross-Section B-B\ Figure 4,3: Local Landfill Geological Cross-Section A-A\ i\ 1 l LL L Ll Figure 4,5: Local Landfill Geological Cross*Seetion C-C'. i1 [ r i i Figure 4.6: Local Landfill Zone A Top-of-Groundwater Map. t; i. i Li ' a... ' V r ur fit:' Figure 4.7: Local Landfill Zone C Top-of-Groundwater Map.  r r I i'iik R L L 1. I L L Figure 5.0: Washington Works Plant Location Map. I Figure 5,1: Washington Works Facility Sampling Points. Figure 5.2: Washington Works Facility Geological Cross-Section Lines, KH- f i| %* %flF i.. .i.. 31 | gl m ! r*i I ELI o?2 X S7ii ,siii -! i-J `i f ilJ R 3* Ss **0i in i u;i~totK.>* ei i . s* -O 1D L L Figure 53: Washington Works Facility Geological Cross-Section A-A*. Figure 5.4: Washington Works Facility Geological Cross-Section B-B'. Figure 5.5: Washington Works Facility Geological Cross-Section C-C\ la iffiiir Figure 5.6: Washington Works Facility Geological Cross-Section D-D7. n r n P IGii.'.-i Figure 5.7: Washington Works Facility Geological Cross-Section E-E\ DEEP OVERBURDEN AQUIFr Q UATERN ARY ALLUVIUM PERMIAN DUNKARD GROUP {SHALE,SANDSTBOENDERCOOCNKSOLIDATED UNIT) I ' . - C. irr- J L 'S est P' I j l C WUtfC' UlV* VC V*.-i } s*** * uT v : ^ . o k p '> !c c : L**>n* t*fv v i j 1 i Uva car O r 1 - OtMniwiUe*- ^er.* c-. i 7 -- rrriLX Corporata R im ila Bu Qrayp Sf.--.Mdi. -f r e*t t.i-.'.-'m?i' Vkv.V*V3 I G : . . j lLi ..D G ! 11 VLx ; ! ..-tL;'* 51 . E? G' {*^J?l -,;:* , r." V /* :*?V ~(c.f .. . V` w- IT r?V 0 0;t, H . r'-W p*.? ,, { X K l*; c>-- ; Kj?<3.% ;C? , ! A>.J ! ' Co*po,1^u,'*JBtti*Mwy*ta-^t*i'*UTV*e+'nV SioUp ,u. ;: u b.t> .J*- , *% _______ . */ .t.. --- *-- I -- Figure 5.9: Washington Works Facility Geological Cross-Section G -G \ Final C-8 GIST Report APPENDIX B: Groundwater data (both graphs and tables) Division o f W ater and Waste Management / DRY RUN LANDFILL SURFACE WATER (l/rl) 80 (- -O u tle t 001 - -O u tle t QQ3 Outlet004 Date Boundary -- Stream#1 -- Stream#2 --h -Leachate ---- Underdrain Limit ._ 1000.0 100.0 10.0 DRY RUN LANDFILL ZONE A GROUNDWATER C-8 (pg/l) <p <$> cr * - v / 5> ^ # <f Date >VJ>! -i$.:g&1iBwSteSsW$rpSpu' r<Sf'if^r'!r`.# -- /<.",'.!(?*;;! cf & & < # <$> O0 ^ $ DRMW-12 -* - DRiflW-13 DRMW-15-H-L1 DRY RUM LANDFILL GROUNDWATER ZONE B (l/ri) 8-0 -- DRMVV-6 ---DRM W -6A ------ DRMW-17B------ DRMW-18B Date DRMW-12A 4t -DRMW-12B - ^ D R M W -1 3 A -#-D R M W -14 -H -- DRMW-16B DRMW-19B DRMW-20B DRWIW-21A -Limit n u p ont 60 Nem ours and C om pany ry R u n L a n d fill W ood C ounty C8 w a te r d a ta Units are p g /l A ze ro e q u a ls a Non D etect concentration A yello w -co lo red concentration is above the W V -D E P limit G ro u n d w a te r monitoring w ell M W -2 1B is actually a "Zone C" w ell G roundw ater Zone A" D ate DB M W -12 DR M W -13 DR M W -15 Lim it M ay-91 A p r-9 3 J u l-9 4 J u n -9 5 A p r-9 6 J u l-9 7 M ay-98 Jun-98 J u l-9 9 J u l-0 0 D ec ;0 1 Jan-02 Feb-02 M ar-02 M ay-02 S e p -0 2 O ct-02 M $r-03 0 0 0 0 .1 3 4 0 .1 6 0 .0 8 6 0 .1 1 6 0.11 0 .0 8 2 9 0 .0 8 1 7 0 .0 6 2 6 0 .1 0 9 0.101 7 9 .2 3 .6 9 .8 9 .8 8 1 6 .5 1 1 .5 1 2 .6 1 6 .9 13.1 2 0 .9 15 0 .2 6 3 0 .7 6 3 4 .9 4 4 ,3 5 3 .6 5 4.91 5 3 .9 9 4 .9 2 4 .6 4 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 G roundw ater Zone B - D ate DRM W -6 DRM W -6A DRM W -12A D R M W -12B DRM W -13A D RM W -14 D RM W -16B M ay-91 0 A p r-9 3 0.4 J u l-9 4 0.5 J u n -9 5 A p r-9 6 J u l-9 7 M ay-98 J g n -9 8 J u l-9 9 J u l-0 0 Dec-01 J a n -0 2 Feb-02 M ar-02 M ay-02 S e p -0 2 O ct-02 M ar-03 0.6 0 .9 7 1 0 .1 9 0 .3 6 0 .2 7 0 .0 9 6 0 .2 1 2 1.04 0 .8 2 4 0 .8 2 2 0 .8 4 3 1.24 0 .7 8 5 1.13 0 .7 2 7 0 0 0 0.081 0 .1 2 8 0 .1 5 8 0 .1 6 8 0 .1 2 5 0 .0 7 8 5 0 .0 8 3 2 0 .0 8 8 0.181 0 .0 5 9 0 5 .4 0 0 .2 1 5 0 .0 8 5 0 0 0 0 0 .2 5 8 0 .0 5 2 11 15 8.7 0.07 9.9 6.4 5.97 3.73 4 2.31 5.14 6 .6 6 1.5 0 0 0 2 .5 0 .1 1 5 0 0 0 0 0 0 0 0 Date & R M W -17B D R M W -18B M a y-91 A pr-93 J u l-9 4 Jun-95 DRM W -19B D R M W -20B D R M W -21A Limit 150 150 150 150 A p r-9 6 J u l-9 7 M ay-98 Jun-98 J u I-9 9 J u l-0 0 Dec-01 Jan-02 F e b -0 2 M ar-02 M ay-02 S e p -0 2 0 c t-0 2 M ar-03 0 .1 5 5 00 0 0 0.27 0 0.138 150 150 150 150 150 150 150 150 150 150 150 150 150 150 G roundw ater Zone C -- Date DRMW-21B Limit M a y-91 A p r-9 3 J u l-9 4 Jun-95 A p r-9 6 J u l-9 7 M ay-98 Jun-98 J u l-9 9 J u l-0 0 Dec-01 Jan-02 Feb-02 M ar-02 M ay-02 S e p -0 2 O ct-02 M ar-03 0 0 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 160 150 Surface W a t e r - Date O u tle t 001 Outlet 0 03 A p r-9 6 86 Outlet 0 0 4 J u l-9 7 M ay-98 17 J u l-9 8 D e c-99 66 Oct-OO 3 1 .5 Dec-01 Jan-02 4 1 .6 Feb-02 M ar-02 A p r-0 2 4 3 .9 7 1 .6 41 6 .7 7 20.1 M ay-02 3 0 .9 P ro p e rty Boundary Stream #1 9 .9 Dry R un Stream # 2 Leachate 1 4.6 Pond U n d e rd ra in 62 56 L im it 0 .8 8 39 1 0 .3 3 .9 9 11.1 3 .8 1 2 2 .8 6 .6 9 9.41 0,54 0.758 1.19 0 .8 9 3 0,85 1.06 0.932 1.63 87 2 7 .6 2 0 .5 4 2 .4 2 4 .3 6 6 .6 2 8 .9 51 34 2 7 .4 109 398 256 334 237 150 3 5 .4 2 9 .3 37.1 6 6 .7 3 3 .4 67.4 Jun-02 J u l-0 2 2 5 .3 0 .7 A u g -0 2 Sep-02 O ct-02 8 1 .7 3 .8 1.63 2 9 .2 704 38-8 N o v -0 2 6 4 .6 D ec-02 5 6 .9 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 J a n -0 5 8 8 .4 150 F e b -0 5 69 1 1 .3 1.24 61.1 9 9 .7 9 9 .7 150 M ar-05 8 8 .5 D a te ' Outlet 001 O utlet 0 0 3 Outlet 004 Boundary Leachate Stream #1 Stream #2 Underdrain Lim it ( I r i i i L I LL l. 10000.0 -v 1000.0 100.0 10.0 UTART LANDFILL GROUNDWATER ZONE F (l/rt) 80 3s ^ ^ o' |-*~LMW-2A - * - LMW-5B P */ / , / / < / / ^ # O* </ Date ^ P 0 p LMW-6 -*-LMW-9 -*-LMW-1G H --LiW^11-----LMW-12 ~r-LMW-13B----- LMW-14B rnit] 1QQG0 1000 LeTART LANDFILL GROUNDWATER ZONE D-E LMW-3A --LMW-4 Date LMW-5A LMW-13A LMW-14A <? Limit # (I/Bri) 80 LeTART GROUNDWATER ZONE C --LM W -3 --L im it C8 (ng/1) 100000 10000 1000 100 10 1 0 LeTART LANDFILL GROUNDWATER ZONE A Date ----LMW-1 -*-LM W -7 LMW-8 Limit (l/ri) 80 I D u P o n t d e Nemours and Company \ L e T art L a ndfill ) 'ason Conty C8 water data Unite are M9^ A zero equals a Non Detect , concentration A yellow-colored c o n c e n tra tio n is a c o n c e n tra tio n a b o v e th e WV-DEP's level G ro u n d w ater d a ta - F-Zone w e lls D ate LMW-2A MW-5B LWM-6 LMW-9 LWM-10 M ar-91 N ov-91 O ct-92 50 340 63 380 25 24 0.2 M a r-9 4 260 1200 M a r-9 4 530 S ep-94 270 480 LWM-11 LMW-12 A p r-96 Ju l-97 M ay-96 Ju l-99 O ct-99 Ja n -O O A pr-00 J u l-O O Oct- 0 0 Jan-01 460 460 990 350 370 453 306 275 248 423 445 1750 1030 1020 1100 900 1190 615 30 9 .4 1 5 .8 0 ,8 4 5 0 .1 3 4 0.1 28 J u l-0 1 D e c -0 1 J a n -0 2 F e b -0 2 M ar-02 M ay-02 S ep-02 Oct-0 2 M ar-03 242 830 740 " 14 717 922 676 931 676. 592 1880 1890 1460 1810 1720 1480 2280 1470 18.1 1 4 .9 1 4 .8 2 0 .7 1 0 .5 15.1 1 1 .6 0 .8 7 5 0 .6 1 7 0 .6 3 1 0 .7 1 5 0 .4 7 9 0 .9 0 7 0 .6 2 5 0 .1 3 3 0.1 26 0 .1 3 6 0 .2 9 8 0 .1 5 9 0 .1 1 2 0 .1 1 9 0 ,0 6 9 0 .0 5 8 0 .1 2 1 0 .1 2 LMW-13B LMW-14B Limit 0 .0 9 5 6 0 .1 4 9 105 7 0 .4 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 )-E Zone w e l l s - 1.6iate LMW-3A LMW-4 LMW-5A LMW-13A LMW-14A Limit M ar-91 380 690 N o v -9 1 350 830 0.8 J u l-9 9 6 0 .3 J a n -0 0 172 A pr-00 D e c -0 1 100 272 1580 9 4 .4 J a n -0 2 F e b -0 2 M ar-02 9 8 .6 101 132 3060 2250 2620 9 9 .3 8 2 .2 9 3 .6 M ay-02 134 1690 8 7 .6 S e p -0 2 Oct-0 2 M ar-03 204 144 1410 2840 1520 112 5 1 0 144 974 498 150 150 150 150 150 150 150 150 150 150 150 150 150 C-Zone w e lis - Date LMW-3 Limit M ar-91 390 150 N o v -9 1 1000 150 V., D e c - 0 1 1520 150 Jar-02 F e b -0 2 M a r-0 2 M a y-02 S ep-02 0 ct- 0 2 M ar-0 3 1700 1920 1760 2270 0 150 150 150 150 150 150 150 A -Z one v/ells-- D ate LM W -1 LM W -7 LM W -d Limit M a r - 9 -1 N ov-91 A p r-96 J u l-97 M a y-96 J u l-99 O ct-99 Ja n -O O 60 68 1700 5100 24000 6020 12600 17400 22000.1 2 8 0 15 5 3 2000 260 2700 7 8 .3 1790 21003 3 9 219 3260 A p r-O O Jul-O O Oct-O O J a n -0 1 J u l-0 1 D ec-01 J a n -0 2 F eb -02 M ar-02 M ay-02 S ep-02 Oct-0 2 M ar-03 13600 8990 10600 9190 6100 24600 29400 18400 20600 30500 23000 25900 25000 211 158 231 249 242 334 496 180 324 567 197 300 218 2180 2160 2300 2650 1120 3240 3930 2230 3520 4020 3100 3480 1720 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 S urface w a t e r - S torm w aterR oute 3 3 B rinker C ap D ata A pr-95 J u l-9 7 J u l-9 9 O ct-99 J a n -0 0 A pr-00 J u l-0 0 J u l-0 1 N o v -0 1 D e c-01 Jan-02 F e b -0 2 M ar-02 A pr-02 M ay-02 J u n -0 2 J u l-0 2 A ug-02 S ep-02 Oct-0 2 N ov-02 D ec-02 Jan-03 F e b -0 3 M ar-03 002 003 . R unoff 3240 920 1900 , 1350 159 5 3 .2 . 3 6 .1 5 0 .1 0 .3 9 0 .1 4 8 355 131 0.198 ' 443 0 .0 6 5 3 1630 0 .2 8 2 1410 2050 4 .5 2 645 639 1170 0 .1 7 5 0 .9 S tre a m Run ' 1 -8 2 2 .2 3 0.5 73 2 .0 1 1.9 3 .9 2 1 .2 6 0 .8 4 5 1 .5 7 2 .2 4 2 .8 3 0 .0 6 1 2 2 .2 7 0 .2 4 7 R unoff Lim it 119 279 371 102 65.1 415 150 150 150 150 150 150 150 150 150 150 150 160 150 150 150 150 150 150 150 150 150 150 150 150 150 D ate 002 003 S W R u n o ff 3 3 S tre a m B lin k e r R u rC a p R u n o ffLim it LOCAL LANDFILL SURFACE WATER j~~Outfall004 - -N e w 004 Dale Outfall005 New005 -^-O u tle t 101 Outlet LM1 --i--Limit] LOCAL LANDFILL GROUNDWATER ZONE A c-8 (|jg/i) --ILM W -4 - j-LLM W -6 Date LLMW-9 LLMW-10 Limit C-8 (ng/l) LOCAL LANDFILL GROUNDWATER ZONE B I-- LLMW-12B - -Lim it c-8 (|ig/l) LOCAL LANDFILL GROUNDWATER ZONE C ) LOCAL LANDFILL GROUNDWATER ZONE D 1000 C-8 (pg/1) Dale --LLMW-11B -Limit Pu Pont de Nemours and Company Local Landfill Wood County C8 water data Units are pg/l A zero equals a Non Detect concentration A yellow-colored concentration is a concentration above the WV-DEP limit Gro undwater Zone A-- Date LLMW-4' LLMW-6 iLLWM-9 LLMW-10 Limit Apr-96 39 15 0 May-98 26 9 0 0.22 May-99 16.2 1.32 0 0.15 May-00 10 1.42 0.039 May-01 1.4 3 0 Dec-01 54,6 11.9 0.046 0.133 Jan-02 58.4 ' 12.2 0 0.146 Feb-02 50.2 10.1 0.14 1.12 Mar-02 47.2 11.5 0 0.698 May-02 55.7 18.6 0 0.56 Sep-02 63.5 13.7 0 0.357 Oct-02 79.6 19.9 0.0569 0.395 . Mar-03 52.4 16.1 0 0.318 150 150 150 150 150 150 150 150 150 150 150 150 150 Groundwater Zone B~ Date LLMW-12B Limit Apr-96 May-98 May-99 May-00 May-01 Dec-01 J an-02 Feb-02 Mar-02 May-02 Sep-02 Oct-02 0.0658 Mar-03 0 150 150 150 150 150 150 150 150 150 150 150 150 150 Groundwater Zone C-- Date LLMW-11A LLMW-13B LLMW-14B Limit Apr-96 150 May-98 150 May-99 150 May-00 150 May-01 150 Dec-01 150 Jan-02 150 Feb-02 150 Mar-02 150 May-02 150 Sep-02 150 Oct-02 2.22 6.61 0.488 150 Mar-03 2,05 6.38 0.317 150 Groundwater Zone D-* 1I|m1f r 1 [ 1 1 1 r l r; 1 f 1; f nI lifl li 1 i' L, fi . Date LLMW-118 Limit Apr-96 150 Nay-98 150 Nay-99 150 Nay-00 150 Nay-01 150 Dec-01 150 Jan-02 150 Feb-02 150 Nar-02 150 May-02 150 Sep-02 . 150 Oct-02 0 150 Mar-03 0 150 Surface Water- Date Outfall 004 New 004 Outfall 005 New 005 Outlet 101 Outlet LM1 Limit Feb-94 11 35 Apr-96 13 39 May-97 13 41 Jun-98 12 39 54 Jun-99 3.06 6.8 15 Dec-99 7.1 34 Sep-00 4.73 13.3 12 Dec-01 - 82.4 J an-02 11.4 51.4 81.4 Feb-02 10.9 46 63.1 Mar-02 1.51 14.6 39 16 36.4 Apr-02 15 14.5 40.9 34.3 48.2 May-02 40 Jun-02 10 9.29 27.3 38 Jul-02 11.6 11.2 32.1 63 Aug-02 70.3 Sep-02 115 Oct-02 78.6 Nov-02 76.7 120 Dec-02 12.5 10.7 38.1 9.51 49.5 81.7 Jan-03 72.3 Feb-03 43.6 ' Mar-03 14.7 15.9 44.9 45.4 Date Outfall 004 New 004 Outfall 005 New 005 Outlet 101 Outlet LM1 Limit 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 l 1000000.0 WASHINGTON WORKS GROUNDWATER (l/Brl) 80 i* i* ' ^ < f ^ " --AE11-MW01 --1-- K16-PWQ1 --i-~- Q04-MW02 N04-MW03 AM07-PWQ1 ------ L04-PW01 -- R04-MWQ2 Y14-MW02 J? ^ AO08-PW01 N04-MW01 --s--V05-PW01 -- Limit #^ Date --*-AX13-PW 01 N13-MW01 Y14-MW01 ^ ^ ^ c f' < f ^ -*-DO 8-M W 01 E13-MW01 P04-MW-2 P08-MW-Q1 ------ West Well Field ------- AJ06-MW02 1000 100 OJ eo WASHINGTON WORKS SURFACE WATER j i N jbN j i N 55n <iN & & & S ' & j?' S ' S ' S ' .& 8 ^ y ^ ^ ^ <* O0 ^ <0? ^ ^ i? # ^ ^ O^ r\ Date s? & ,0 ^ <<^ # --Outlet001 --Outfall 002 . Outlet 003 -^--OutfaU005 Hie-Outlet007 --Outlet 105 -e-Limit Du Pont d e Nem ours and Com pany W ash in g to n W orks . W ood C ounty C8 w a te r data Units are pg/l . a 7pto e a uals a Non D etect concentration _ , ,, A y e llo w -co lo re d concentration is a concentration above the W V -D E P limit Groundwater- D ate AE11-M W 01 A pr-96 J u n -9 7 J u n -9 8 N ov-98 F e b -9 9 0-^1 0 .6 9 M ay-99 A ug-00 N ov-00 AM07-PW Q1 A 008-P W 01 A X13-PW 01 0 .4 8 0 .7 9 0.4 0 .5 2 0 .5 5 1 1.9 0 .0 8 2 0 .5 7 8 0.071 0 .2 4 0 .3 0 7 0 ,1 6 7 0 .4 DO 8-M W 01 E13-M W 01 K16-PW 01 L04-PW 01 N 0 4 -M W 0 1 2 0 .5 9 0 .8 8 2 0 ,4 6 1 6 .2 7.5 7.9 5 .8 9 13.8 Jan-01 A p r-0 1 Jul-01 J a n -0 2 F e b -0 2 M ar-02 A p r;0 2 M ay-02 S e p -0 2 O ct-0 2 M ar-03 1.2 1 .4 5 2 .8 2 1 .2 2 1 .2 6 1 .9 2 1 .7 4 1 .3 7 0.131 0 .1 2 9 0.171 0 .1 6 9 0 .2 4 7 0 .3 3 5 0 .2 6 9 0 0 .3 5 5 0 .4 3 9 0 .5 6 8 0 .4 9 7 0 .4 9 9 0 .4 2 0 .4 1 5 0 .3 0 8 1 .0 3 1-22 1 .4 2 0.911 0 .8 3 4 0.721 1 .0 7 0 .5 8 2 1.27 0.262 0 .4 2 4 ' 0.551 0 .1 1 7 0 .1 2 6 3 .7 2 2.11 2 .3 2 1.62 2 .4 4 2 .4 7 2 .3 9 3 .4 3 3 .1 5 1 0 .5 12 1 7 .2 1 3 .2 12.4 9.71 1 6 .2 8 .9 3 3 .9 9 0 .2 0 2 3 0 .9 2 3 .5 4 0 .9 . 16.1 15.1 3 .0 6 1 4 .0 3 1 9 .8 D ais N 13-M W 01 P 04-M W -2 P08-M W -01 Q 04-M W 02 -M W 02 V05-PW 01 Y 14-M W 01 W est W ell F ie ld A p r-9 6 Jun-97 J iin -9 8 N o v -9 8 F e b -9 9 M ay-99 A u g -0 0 N ov-00 Jan-01 A p r-0 1 Jul-01 Jan-02 Feb-02 M ar-02 A pr-02 M ay-02 S e p -0 2 O ct-0 2 M ar-03 0 2 9 .6 8300 13600 5 7 .8 12600 23600 26800 32300 36500 42400 34400 46600 36900 36' 4 3 .4 2 0 .7 120 660 994 1300 9420 13800 1480 16O 2070 1210 1480 3 2 .2 7720 566 47500. 43600 54400 56300 68100 66500 84100 322000 0 .6 6 1 2 .4 12 4 .9 5 13.7 5.48 ' 11.4 29 25.1 4 0 .9 3 7 ,6 3 5 .8 3 4 .8 51.2 4 2 .5 12.7 1 0 .9 1 5 .5 1 3 .9 1 5 .3 18.4 18.2 1 5 .7 1 .5 8 2.31 2.31 1 .5 8 7 .7 2 6 .6 9 7 .0 9 6.41 1 0 .3 7 .2 D ale A J 0 6 -M W -0 2 N04-M W Q 3 A p r-9 6 Jun-97 Jun-98 N o v -9 8 Feb-99 M ay-99 A u g -0 0 N o v -0 0 Y 1 4 -M W -0 2 Limit 150 150 150 150 150 150 150 150 F inal C-8 GIST Report APPENDIX C: Consent Order N o. G W -2001 -019 D ivision o f W ater and Waste Management CONSENT ORDER ISSUED PURSUANT TO ARTICLES 5 and 12, CHAPTER 22 AND ARTICLE 1, CHAPTER 16 r w TT-TTr W E ST V IR G IN IA CODE. XO: E. I. DU PONT DE NEMOURS AND COMPANY DATE: November 14,2001 West Virginia Department of Environmental Protection Order No. GWR-2001-019 West Virginia Department of Health and Human Resources . This CONSENT ORDER is issued by the Director of the Division of Water Resources Health and Human Resources, pursuant to the authority set forth m more detail below. . I. INTRODUCTION OF PARTIES, This Consent Order is entered into by end between the West Vrrgrmn Department of Environmental Protection [WVDEP], the West Virginia Department ofHealth and Human R k Z Z - Bureau for Public Health (WVDHHR-BPH], _andE. I. du Pont de Nemours and Company [DuPont)[collectively referred to as the' Parties J. II. PURPOSE OF CONSENT ORDER. This Consent Order sets forth a series of tasks to beperformed by the Parties in order to determine whether there has been any impact on human health and the environment as a resu reS Wfromr DasutoPhfonasmt Wompaoesrnhaiuitnimogntpos.nerCWfl8uooirrskoasocmfataacntieloirtaiyatellou[cCsaet8de]d,bCyatADWSuPaNsouhnmitnbIgnetoritn3s,8fW2lu5oo-or2do6p-C1ro,odtuouncttthys,emWenaevnsiurtfVoanicmrtugeninnntg. C8 is not identified as ahazardous substance, hazardous waste or otherwise specifically regulate underWTehsitsVCirognisneinatoOrrfdeedrerhaalssbtaeteunteneogrorteigauteladtiionng.ood faith and the actions undertaken by DuPont pursuant to this Consent Order do not constitute an admission of any liability on its part. DuPont retains the right to controvert in any other proceedings, other than proceedings to im pkm enfrenteeThis Consent Order, the validity of.he Endings of fact and conclusions o f law set forth herein. DuPont agrees to comply with and be bound by the terns o f^ C o n s e n t Order and further agrees in any proceeding to implement or enforce this Consent Order that it 1 win no, non,es, ,he vs,idi,Vof,his Consen, Order or,he jurisdiction of WVDEi and WVDHHR- BPH to issue it. in. d e f in it io n s . W henever toe terms identified below are used in toe Consen, Order or in any exhibit or attachm ent hereto, the following definitions shall apply: , 'T he Agencies" shall mean the Department o f Health and Human Resources, Bureau for PublicHeaUh and toe Department o f Environmental Protection, including toe D ivision s o f Air Quality and Water Resources. "C8" shall mean the chemical compound ammonium perfluorooctanoate. 2. , "Detection Limit" means toe low est analytical level that can be refiably achieved w ithin specified limits o f precision of a num ber o f laboratories available to conduct the analyses. 4 . "Effective Date" shall mean the date set forth in Section XVII of this Consent Order. "EPA" shall mean the United States Environmental Protection Agency. c-wonitthrooult6ol`ufmDutaPt"otoFnnto,ractceatuMshoafjeGuuMor,ed,", ashctai,lolnmoeriai.nnaccounAVdiptri0orfnngmesooevrbecrvinrdmcuueemndtsa^itllai(gpnaegcrnoeescnveicbdieaeeynsdo,d,nohsrdohawathdlelemvinreienrca,liussDtdorunea,Patibovnleetor complying with the work plan. 7 "GroundwaterMonitoring Well" shall mean any cased tdheeteprmouinnidngmtahdeepbhyysd.cigagl,incgh,e"mtncalf, i mo s tge a l^or radtolopca p p ^ ^ fM p^osTsTte^^^ but does not include wells whose primary purpose is to provide a supply ofpotable water. o "Hmundwater Well" or "Well" shall mean any drilled or excavated groundwater ^ r ja s a s a s s r 2 located in West Virginia. 9. "Re.im,bursaubi lerCwostcs" ^hall mean caonstds.attrliebmuteanbtlaeti(oonn0afnthhiosuCrloynbsaesnits)Otrodtehre, the WOIk ofDee Anh S > ^ ^ p " on th6 C8 A ssess, ofToxicity Team, as descnbed Groundwater Investigation Steenng Team (GIS ). ^Jisffs^ssissssasssss' Order. 11 "The Facilities" shall mean the Washington Works and the Local Landfill, depicted on Exhibit 1. theLetar, Landf.ll, depicted on Exhibit 2, and the Dry Ran Lan , depicted on Exhibit 3. _ ,, nr "PfD" shall mean an estimate (with uncertainty spanning 12. "Reference Do exposure level for thehuman population, perhaps an order of magnitude or grea ) an appreciable risk of deleterious exposure to a compound. , , "Screening Level" shall mean the concentration in a specific media such as air, water, ol soil, t h S 4 to he without an appreciabie risk of deie.enous effects dnnng a lifetime in the human population. IV. WAIVER OF RIGHTS. *11 riohts it mav have to appeal or challenge the validity or requiremMhshfTws Co^entOrder, and shall not challenge thejurisdiction of the Agencies to issue thTishCisoCnsoennsteOntrd<er.^ assigns. ^ ^ ^ bMing ^ fce P a rfe and thei, successors and V. FINDINGS OF FACT. 1. cs is a Chemical substance which has no established state or federal effluent o r emission standards. 2, C8 is a perfluorinated surfactant manufactured by the 3M Company and others. 3 , 1 1 Q^n'c pr has been used by DuPont in its fluoropolymer-related manufacturing 3 Residues containing C8 from fluoropolymer rf captures for recycle a significant portion of used C8. to , detec5t .the prOSeiisnneccneecaaessaneeaadrrlllyyevaaesl 119990, oi L8 DinuPonatrhoausnpdecrefIotraminedofrettgenuoFlapmrn,icBvieotsilunCtianurrWyreenrstatltyVe,rtDsraugtmPnotpanltianangldso EPA. in and , tuound cAerstaainr^esouflttsoFf aDcuitPoo' n65t'isnsWamepstliVngir,gCin8iah,aisnbceluednindgetpecrtivedateinthvainrkyiinngg concentrations water wells and public water supplies. 7 , Analyses of water samples have reported levels of C8 in the Lubeck Public Service District ("LPSD") drinking water supply. - o DuPont by and through its use of C8 in the fluoropolymer manufacturing process, is the likely somcf^ p r e s e n c e in - around certain of its Facilities in West Vtrguna. particip9ated in AmluolntigplweisthtuednievsireoxnammeinntianlgstahmepplointegnftoiarlCe8ff,eDctusPoofnCt h8aesxppoesruforermonedhaunmdan health and the environment. . 10. Studies performed by DuPont and 3M have determined that C8 in sufficient dinogseesst,ioi.ne,.,icnohnaslaidtieorninagnbdodtherammaol ucnont taancdt. dSurtuatdiioens ohfavexepaolssuorfeo,uinsdtotxhiact Ct o a 8 nisi mpersistent m huma and the environment. 11 Although DuPont has collected a large amount of data on the presence ofC8 in the environment, the ^encies believe that additional information tchoelleecxtteedntbaynDd ucPonocnetnitnrdaitcioantessothf aCt8Ci8n itshpereensveinrtoninmtehnetsaurofarcneeaanrd groundwater at t^he LLeettaarrtt aand 4 Dry Run Landfills and at or near the Washington Works facility, 19 WVDEP and WVDHHR-BPH have determined that it is desirable to ascertain the source of drinking water for persons potentially exposed to C8 in groundwater or surface waters in the area of the Facilities. 13 EPA WVDEP, and WVDHHR-BPH, in consultation and cooperation with one another have requested, and DuPont has submitted, information and documents relatingto the detection and presence of C8 in and around the Facilities and documents with respect to the human health studies being performed related to C8 exposure. 14. Based upon information submitted by DuPont and reviewed to date byEPA, WVDEP and WVDHHR-BPH, the Agencies believe that additional data would assist m their evaluation of whether the ground and surface waters now containing C8 have a complete exposure pathway to humans and whether persons in and around the Facilities are at nsk of adverse health effects from C8 exposure. 15 There have been no independent governmental or non-industrial studies performed on the human health effects of C8 exposure for the purpose of establishing an exposure standard for C8 applicable to the general public. 16. The Agencies have concluded that full site and health assessments are necessary to ascertain the extent and level of C8 concentrations in the environment and to assist them m determining whether C8 presents any possible danger to the public. DuPont has agreed to participate and assist in this effort. 17 The fluoropolymers industry has committed to EPA to reduce total actual C8 emissions for either the year 1999 or the year2000 by 50 percent within three to five years o f each company's commitment date. DuPont committed to this goal m 200 . 18. DuPont installed, in March 2001, a filter and carbon treatment system at its Washington Works facility that is demonstrating removal efficiency of 90-95% of the C8 in its major C8-containing wastewater stream. VI, AUTHORITY TO ISSUE CONSENT ORDER. 1 The WVDEP is the state agency vested with the authority to protect the environment in West Virginia. 2 Article 12, Chapter 22 ofthe West Virginia Code, the Groundwater Protection Act, grants to the WVDEP the authority to protect the State's groundwater from any contaminant 5 raenqdu,iwrihnegrethcaotngtraomuinndawteadtegrrboeunredmweadteiarti.esdff.oundj , to inncsttiittuiittee aa cciivviill aacct.ion or issue an order grants t3o.the WAVrDtiEclPe 5t,h,eC,,ahuatph,toerritn2yr2jtooffprtrhuoteWcteshtteVSitraggtieniaasCirotdre, thpPeoAlluirtaPnotlsluatniodntoCionnsttritoultAe cat, d v il action or issue orders to enforce the statute. 4 . The W VDHHR-BPH is the state agency vested with the authority to regulate and protect drinking water supplies in West Virginia. AArrttiVcllee 11, CChhaapptter 16_o f .t_h_e_W__est Virgi,nianCf tohdees,tgarteanatnsdtotothpeerWfoVrmDHalHl R-BPH V II, R E Q U IR E M E N T S O F -C O N S E N T .O R D E R . The Agencies have C^n^theenriromi^ent h^and A . Establishment o f Groundwater Investigation Steering Team. team are set forth in full in A ,," lTM " dW hased approach to fulBllm g the majority o f th e o f the GIST w ill be to oversee ' ^ f * ' ` ^ phT he performed w ith oversight from th e ' 2 . u p o n con clu sion ,f hey merionesrin fI* GIST shall issue interim or final reports s g bAa.ckgArnoyu nd data, groundwater groundwater monitoring plan devel p ident?fication as described in Attachm ent A sha,, survivethe ^ gg a m inor peraiit m odification fo r ttehremFiancaitliiotineso.f DthuisPoCnotnrseesnetr0versd t|hf ea"nght to requessttMmoudification o f the plans upon renewal o f the Facilities' permits. B. National Pollutant Discharge Elimination System Requirements. 6 1 Except as occasioned by no-flow conditions, DuPont shall perform monthly sampling for C8 at the Local Landfill at certain outfalls identified in West Virgm.^ationaf PdlSant Discharge Elimination System ("WV NPDES") Permit No. 0076538 as Outfalls 101, 004 and 005. 2 Except as occasioned by no-flow conditions, DuPont shall perfomni monthly sampling for C8 at the Washington Works facility at certain outfalls identified m WV NPDES Permit No. WV0001279 as Outfalls 001,002,003, 005, 007, and 105. 3 Except as occasioned by no-flow conditions, DuPont shall perform monthly sampling for C8 at Dry Run Landfill at all outfalls identified in its WV NPDES Permit No. WV0076244. 4 Except as occasioned by no-flow conditions, DuPont shall perform monthly sampling for C8 at Letart Landfill at all outfalls identified in its WV NPDES Permit No. WV0076066. . 5 With respect to the requirements ofparagraphs VILB.l through Vfl.B.4, all sampling shall be performed pursuant to established EPA guidelines, where applicable^ and results shall be delivered to the WVDEP within thirty days ofreceiving such results. DuPont shall record and report all attempts to sample under no-flow conditions. 6 Within 90 days of the Effective Date of this Consent Order, DuPont agrees to oObhtaioinRaivsearminpltehferoamreaeaexchtesnudrifnagcetenorriavlelurvmiaillewsadtoerwinnsttarkeaemforopf uthbeliWc wasahteinrgstuopnpWlieosraklsonfagctihlitey, and one river mile upstream of the Washington Works facility. If concentrations of C8 above tdshhoeawlDnl bsettereeceatximtoennsedLgeimdmteitonattsrweienfnoittuiyanrldliyviensraammnpyillesesadmd, tophwleendssetprguemabemlinctoswrwattwietrhoisrnuivwpephrlimychwileiitnshtuianpksetthsreeaaruempts,otrabesaeamspapomrropplreidate. Isafmcopnlcinengtwraitlilobnes paebrofvoermtheedDoentewcatitoenr iLnitmakitesawreitfhoiunntdhiinrtyannyvesergmmielenstdsoowenxtsetrnedaemd,o"r tlhoreneanvl er miles upstream, as appropriate. 7 The additional monitoring requirements contained in this subsection shall be incorporated into permits by minor the Facilities' modification. WDuePstoVntirrgeisneirav/NesatthioenrailghPtotlolurtaeqnut eDsitscahmarogdeifEiclaimtioinnaotifotnheSsyes tem requirements upon renewal of the permits. C. Toxicological and Human Health Assessment. 1 DuPont agrees to fund the various tasks set forth below as a part of this Consent Order by establishing an'escrow account at a bank agreed to by the Parties, or by some other 7 m 6aJls agreed 0 by the P a rti . Disbursem ents from said c r o w shall be authorized by the C8 ? ic it y Team Leader arrdDuPont reprentativejointly as dcnbed below. 2. A C8 Assessm ent o f Toxicity Team ("CAT Team") shall be established with m em bers o f the team consisting o f representatives of: WWVVDDEHPHR-BPH EPA Region El NICS ADTuPSoDnRt 3 The W VDEP representative shall be the Team Leader. 4. The individual team members, the tasks o f the team, and the team objectives are set forth in full in Attachment C o f this Consent Order. c Huon conclusion o f all the tasks set forth in Attachment C, the CAT Team shall issue a final re^ ri s e t o g U findings o f fact and conclusions as to what extent there may b e health risks associated with C8 at the Facilities. D . Emission M odeling Assessment. t The following information shall be submitted to the Division o f Air Quality ( "D A Q ) within 30 days o f the Effective Date except where a different deadline is provided m this subsection: a A com plete and accurate list o f building dim ension parameters for all structures located within the W ashington Works facility that have a s i ^ f i c a n t ^ Profile Input Program (BPA-454/R-93-038 Revised Feb. 8,1995). b A complete and accurate list o f DuPont's current permitted allowable em ission rat and confirmed actual C8 emission rat in pounds per year for the year 2000 f X a o c u o rces r l-t located 0 " st within cT m the Washington W and corresponding oprekrsmfiitn anluitmy .b eEr.a cFhoermeaiscshiosntapcok.n, dt shall e fie be fisted d above as em ittingC S DuPont shall list all relevant stack parameters to be used m arr dtspersron m o d e l s c. For each emission point (stack) emitting C8, the following information shall be supplied: 8 i Phase of C8 (solid, vapor or aqueous solution) at stack conditions. ii The particle characterization to be used for modeling including the particle size distribution (microns), the mass fraction of C8 in each particle size category, and the particle density (g/cm3). iii For particulate emissions, scavenging coefficients (hr/s-mm) for both liquid and frozen precipitation to be used for wet deposition modeling based upon the particle size distribution and the EPA's Industrial Source Complex, Version 3 Model Guidance ^ (EPA-454/B-95-003b Sept. 1995) ("ISC Guidance"). DuPont may submit, within 30 days of the Effective Date, information to support the use of the normalized scavenging IoSrCdiGsaupipdraonvceew(Fitihgujruest1if1icoaftiIoSnCinGwuirditainncge,)DfourPoCn8t'sssscuabvmenisgsiinogn.coS^houcl;d^DAQ disapprove DuPont shall have the right, within seven days, to request a meeting with DAQ and U address the deficiencies set forth decision. Following a meeting o in D f the ApaQr'tsielse,tDteAr Qandshtaollreisqsuueestardeeccoinssiiodnerleatttieornroegf,aDrAmQg\s scavenging coefficients within seven days of the meeting. DAQ reserves the right to require measurement of C8's scavenging coefficients in its decision and DuPont resen t the nght to assert a claim of confidentiality in the event such a measurement is made. ' iv For gaseous emissions, scavenging coefficients (hr/s-mm) for both lfiuqnucitdioanndoffrdorzoepnleptrseicziepuitsaitniognfotormbeuluaseeidnftohrewopetendelpitoesriattiuornembaosdeedlionngtwhiellpbheyspicraovl ipdreodpearstaies of tCefShomh8reomiaEsunslfiddfoDencDcAostAinQvinsQeicssDlhtdueaaidnsltalitenp,awgppiinrtpinfhorofvoroSevmre,emcDaottaiuriotoPindnooinsnt1ao.to4pnsspuhortpafholptevlhoehperaetwIrvtSichetCehetnhjpGtuearusgortiepiidgfoiaohcsnftae,cCdtewio8.sincteDhammivuneiPswnsosegrinvoiitntenimngnsgcatd,hoyaDaeystfusufw,iPbctoomioeuninrlttdet,sqwfbuoseiuertshbigtnmmaagsim3easos0sieueodeosntau.iysnsg o f wrdeeictcohinsDisoiAndeQlreatattneiordnrUeogSfaEDrPdAiAnQgt'oCs ad8d'esdcirssecisaosvnte.hneFgdoinlelgfoicwcoiieennfgfciicaeismenseetetstiwfnoirgtthhoinfmtshDeevApenaQrd'tsiaelyse,stDtoeAfrtQahnedsmhtaoelelrteiisqnsugue.estDa AQ rDeuseProvnetsrtehseerrvigehsttthoerreiqghutirteomasesaesrutraemcleanimt ooffCc8o'nsfisdceanvteinalgiitnygincothefefiecvieennttssumchitsadmeecaissiuornemanednt is made. d To the extent that the phases exist, a solid, liquid and vapor phase (T-P) diagram for C8 with respect to pressure and temperature. The temperature and pressure ranges shall be representative of exhaust gas conditions before and after control equipment. Estimates of C8's c ritic a l properties shall be provided along with measured ranges of phase transition temperatures. 9 - e In Heu o f a binary phase (T-x-y) diagram representing the vapor-liquid equilibrium between water and C8, the solubility and Kxafft Point o f C8 m aqueous solutions, measured pK value for C8 dissociation in aqueous solutions, and measurements concentrations or related ad d s observed w hen tested in a head space GC .at various ntrntinm temperatures and pHs representative o f the ranges observed during actual operating conditions. F u ita m o re a discussion regarding the volatility o f C8 solutions as a function o f pH w ill be provided. The information in this paragraph shall be subm itted to the DAQ within 60 days o f the E ffective D ate. f Henry's law coefficient for 8 and a discussion o f its dependence on pH . T h e coefficient shall be defined at various temperatures covering the range observed during actual operations. g. A ny carbon adsorption data in the form o f isotherm s for C8 adsorption. D A Q w ill provide DuPont an opportunity to comment on m odeling methodology and assum ptions prior to finalizing the m odeling results.- 2. Any expenses incurred as a result o f accurately supplying the information requested above shall be covered by DuPont. 3 Upon submission o f the information required by this Subsection VII.D, DAQ reserves the right to disapprove any data if the analytical methodology or quality control procedures are deemed inappropriate. VIII. REIM BURSEM ENT OF COSTS. 1 DuPont agrees to establish an escrow account to fund Reimbursable Costs under this Consent Order. Expenditures from this account shall be made upon joint approval by a d u ly d e s i S ^ r l n t a t i v e o f the W VDEP and o f DuPont ("designated represat,ves"h W n tt . notice o f such designation shall be sent to the persons identified pursuant to Section XVI o fth is C ,, " t " i r " ,he execution o f this Consent Order. W VDEP has provided DuPont w tth an estimate o f Reimbursable Costs that W VDEP expects to incur under this Consent Order. 2 W ithin 10 business days o f the Effective Date, DuPont shall deposit in the escrow account funds in the amount o f fifty thousand dollars ($50,000). Each expenditure from the escrow account must be supported by an itemized accounting, including invoices and receipts^ Said escrow account shall be replenished with additional funds whenever the balance is less than ten thousand dollars ($10,000), or as agreed to by the designated representatives. Any unexpended amount remaining in the escrow account at the conclusion o f the work to be performed under this Consent Order shall be returned to DuPont. 3. D uPont's obligation to pay Reim bursable Costs under this Consent Order s h a ll 10 ,, ceed Wo hundred and fifty thousand dollars (S250.000). Except as to Reimbursable Costs w h irafis its obligations sed under sCeopnarseantetlyOirndetrhisshsaelcl tbioent,haellsoolteherrescpoosntssiibnicluitryreadndboybDliugPaotinotntno carrying out f DuPont. IX. QUALITY ASSURANCE/QUALITY CONTROL. All sampling and analyses performedpursuant to this Consent Order shall conform to EPA ,,dance r e 3 n g quality assurance/quality control, data validation, and chain of custody sampling. ' X. C8 REDUCTION PROGRAM. 1 Notwithstanding current permitted emission levels, DuPont agrees to limit voevaerrabllasC'isSaenmdisshsi*aolnl sfut.rotht,,hereparirovt.oidneo_tomtohreeWttuhVaaTnD1aaEccPttuumaalloccnaatliheennlyduamermyyiesesairo2n0s0r0eploervteslsreognarad,,cinaglernC9d8a.r Tim remirting requirement contained herein shall be modified to quarterly reports upon the issuance of a Screening Level derived following the procedures set out m Attachment C. 2 DuPont agrees to reduce emissions to the air and discharges to the water of C8 collectively by 50% from actual 1999 levels by December 31,2003. 3 DuPont shall operate and maintain the filter and carbon bed treatment system at its Washington Works facility with the goal of achieving 90-95% C8 removal efficiency in its major C8-containing wastewater stream. ' 4. DuPont shall conduct th following construction projects and abide by the specified dates: a. DuPont shall install an improved scrubber filter to replace recoveiy device T61ZC on permit R13.-85D. Construction shall begin no later than Februaiy 28,2002. . operation shall begin no later than the date of start up after the April shutdown, or June 28,200 , whichever is earlier. b DuPont shall modify the stack for emission point T6IZCE so that the beme issiszieodntpoopinrotveildeevaetfifoenctiisve17d0isfpeeertsiaobnoovef pgarartdiec.ulTatheeesmtaicsski.odniasmaectceorr,dvineg^t^o^45^Code e s ta te bReugliens,nSoerlaietesr2t0ha(nGFoeobdruEanrgyin2e8e,r2i0n0g2P.raIcntiitciaelaospAerpaptliiocnabshlealtlobSetgaicnknHoeliagthertst)h.anCothnestdruatcetioonfiss up after the April shutdown, or June 28, 2002, whichever is earl.er. At times when dev.ee T61ZC is not operating, permitted emissions from soubber T6JC shall be emftted to emtssmn pent 11 T61ZCE. 5. DuPont shall conduct a scrubber optimization and recovery improvement program tschtouamtdpyshasanhlyal lcslohbnaelslicsiomtmoppflelaemtseteunbdtyyitdoheefnsetcinfriduebdobfiemMrpoarprocevhrea2mti0oe0nn2tf.sorPfordroetvvhiidicseeddCetv2hiDeceWreasCnud2ltssoinamrpieleaerrnmicmiotupRrra]og3vi-en6mg1,e4tnAhte.s for. e u" s C2DTC2 on pernti. R13-614A, C2EHC2 on permit R13-1953, and C1FSC2 on proposed permit for R13-2365A. Implementation ofthe improvements for the latter devices w ill be complete no later than the end ofNovember 2002. XI. COMPLIANCE WITH SCREENING LEVELS. ' 1. The following requirements shall apply only if the procedures set out in Attachment C have been followed: a No later than 60 days after receipt of notification from the Agencies that data or information developed pursuant to this Consent Order or other information that is recent and valid demonstrates that DuPont's operations have resulted m C8 exposures above the Screening Levels derived following the procedures set out in Attachment C, DuPont shall submit a plan for Screeninc gXLrevoevls a l by the Ageucta within a reasonable he. is time ( tdheesi'gRneemde,d0iarledPulacnef c or hthoe Prlaen s ). to levels below the b Within 30 days of receipt of the Remedial Plan submitted by DuPont, the WVDEP shall, upon consultation with the WVDHHR-BPB and based upon accuracy, quality, and PcolamnpltehteenWesVsDeEitPhesrhaapllpnrootviefyoDr duiPsaonppt rinovwertihtienPgltahna.t tIhfethReeWmeVdDiaElPPldainsahpapsrboeveens tdhiesaRpepmroevdeidal and hall specify the reasons for such disapproval. DuPont shall resubmit the Remedial Plan as -revised to address the deficiencies identified in the notice. DuPont s failure to submit an approvable Remedial Plan shall be deemed a violation of this Consent Order. 1: 2 In the event EPA or the WVDEP develops and finalizes a reference dose/screening ElePveAl SfotarnCd8aridn"a)ctchoartdwaonuceldwbiethaapppplilcicaabblelet-ostDatuuptoornyt'asnadcrteivgiutileastoorrytrheeqFuiarceimliteinetssin("dtehpeeRndeegnutkotofrtyhis Consent Order DuPont's obligations under this Section shall be determined with reference to the Regulatory EPA Standard. DuPont reserves all rights it may have to comment upon, object to, or appeal the Regulatory EPA Standard in proceedings separate and apart from this Consent Order. XII. COMPLETION OF CONSENT ORDER. 1 Except as to DuPont's obligations under Section XI, this Consent Order and DSeucPreotnatr'ys oobfltihgeatWioVnsDhEePreournhdeisrdshesailglnteeremainndatferoumpotnheisCsuo;nmimceisosfi;oanceormopfletht!eioWn VDHHR-BPfi 12 DuPont. Agencies In a timely shall issue mthaencnoemr pfolelltoiowninlegttreerc(es)ipttooDfuaPwornitttoernsrheaqluleisstsufreoamleDttueProtnotDtuhPe ornespdeectta,vileing the obligations and work that have not been completed in accordance with this Consent Order. The Parties agree that the Agencies' obligation to issue this letter shall be deemed a nomdiscretionary duty. 2 DuPont's obligation to achieve and maintain compliance with the Screening Levels as provided in Section XI of this Consent Order shall survive the termination of this Consent Order. Such obligation shall terminate only as provided m Section XI or upon agreement of th Parties. . . XIII. ADDITIONAL ACTIONS. The Agencies, individually or collectively, pursuant to their statutory duty and authority, may determine that additional action, beyond the tasks set forth in this Consent Order, is necessary taos prreosttreacitnhinugmoarnphreeavletnhtianngdt/ohretAhegeenncviiersonfrmomentt.akNinogthsiuncghmactthioisnCs.oNnsoetnhtinOgrdmerthshisaCllobnesCe"nt sO*TMrder clSioaanbfseitliDittuyritinetskmianagsyaWhtiasafvtaeecrtpiAuorncstuo, atfhnoetrtWroeetlhesatesVfeeidfrregorimnaliaaCnGleyraocnulanWidmawtoaertrecAraPcutrs,oetthoeecftfaieocdnteioArnaclatC,gtalheinaensWtADeisurtPAVocnitrt,gtfihonreiaafeAndyierral Pollution Control Act, other statutes applicable to this matter, or West Virginia common law. NreoqtuhiirnegmienntthsiosfCDounPseonntt OanrddenroitnhianngyiwnathyicsoCnostnitsuentetsOarmdeordsihfiaclaltoiobnligoartwe aDiuvePronotf tsotautuntdoeirytake any actions not specified herein. ' XIV. ENFORCEMENT. Enforcement of this Consent Order may be had by the filing of a civil action by any of the AcroegsneudnlitctiiionensesninofotfrhtceheiCms iCerncoutniastceCtniootunOrbrtdeoeifnrWgbytoaDokdeunPC,ooinnutcnlitusyd,aiWnvgieosalatrtVeioqirnugeoisnftitafho.erVWciivoelisalttpiVoeninragolitfnietiahseaCstoesdremet safonardnthdmbayylaw, DuPont shall not be liable for violations of this Consent Order due to any "Force Majeure condition. XV. CONTENTS OF CONSENT ORDER/MODIFICATION. The entirety of this Consent Order consists of the terms and conditions set forth herein and in any attachments or exhibits referenced herein. Modification of the terms and conditions of tins COordnesrensthaOllrdbeerminacdluedoinnlgyabnyyamgroedeimficeanttioonf tohfetPimaretfireasminesworritdinega,delixnceespetstthaabtlimshoeddifmicatthioisnCs toonasenny 13 requirement set out in the attachments to this Consent Order maybe made upon consensus of the members of the GIST or the CAT Team, as appropriate. . XVI, ADDRESSES FOR ALL CORRESPONDENCE correspAolnlddeonccuem, teonbtse, isnucblmudititnegdruenpdoerrtst,haipspCroonvsaelsn,tnOortidfeicrasthioanllsb, deisseanptpbroyvcaelrst,ifainedd omthaeilr, return receipt requested, hand delivery, overnight mail orby courier service to the following addresses or to such addresses DuPont or WVDEP may designate in writing. _ Documents to be submitted to WVDEP should be sent to: WV Department of Environmental Protection 1356 Hansford Street Charleston, West Virginia 25301 . Attention: Armando Benincasa, Esq. Attention: Dee Aim Staats, Ph.D. Phone No.: (304) 558-2508 ' Documents to be submitted to WVDHHR-BPH should be sent to: WV Department of Health and Human Resources Bureau for Public Health 8C1h5arQleusatorrni,erWSetrsteeVt,irSguinitiea42158301 Attention: William Toomey, Manager of Source Water Assessment Program Phone No,: (304)558-2981 ' Documents to be submitted to DuPont should be sent to: E.T. du Font de Nemours and Company PWPa.Oarks.heBrinosbgxutor1ng2,1WW7oersktsVirginia 26102 . APhttoennetiNono:.: P(a3u0l 4B)o8s6s3e-r4t 305 and 14 HLe. gI.adl uDPepoanrttdmeeNnte,mSuouitresDa-n7d1Company W10i0lm7 Mingartoknet, DSterleaewt are 19898 Attention: Bernard J. Reilly, Esq. Phone No.: (302)774-5445 XVII. AUTHORIZED SIGNATORIES/NON-ADMISSION. . Tt_h-e undersi,gnr\edireprejsentatiUvaejsi sotoaDteotrhtuant itthyetyohaalvloewhafodrftuhlel iarncdoufanisreolptpoodrotutnhietysatome, " L . they have the authority to enter into this Consent Order aNndeihthaevretthheetaeurtmhsoroitfythtoisbCinodnstehneitrOrredspere,cntiovreepxaerctuy.tion thereofshall constitute an admission by and defenses tDhautPmonatyobfeaanvyafialacbt loerino f any legal liability. DuPont expressly reserves all nghts any proceeding involving third parties or involving WV%DFPiasndCWonVseDnHt HOrRd-eBrPmHayinbaensyigontehderinmcaottuenrt.erparts and shall be effective upon si.gnature o f all tbe Parties below ("Effective Date ). Entered t h i s / ^ d a y o f by: WEST VIRGINIA DEPARTMENT OF ENVIRONMENTAL PROTECTION BY: ' WWeILstLVIiArgMin/i.aADDepAaMrtmS,enDtEoPfUETnYvirSoEnCmRenEtTalAPRrYotection C13h5a6rlHesatonnsf,oWrdesSttrVeeirtginia 25301 Entered this f ,c * $ day of 'fy /e fitfa s ^2001, by; 15 WEST VIRGINIA DIVISION OF HEALTH AND HUMAN RESOURCES BUREAU FOR PUBLIC HEALTH BY: TJR-rllE. tXIM M lSSIDEB? Bureau W est V for Public Health irginia Department o f H ealth and Human Resources Diam ond Building, Room 702 3 50. Capitol Street Charleston, W est Virginia 25301 Entered this / A y o f _ g L , 2001, by: E. I. DU PONT DE NEMOURS AND COMPANY BYn 16 Attachment A C8 groundwater investigation steering team a team o f scientists shall be assembled to assess the presence and extent o f C8 in driving water.^oundwaterand " is S S S s rs s rs = = S S fi"S 2 S SSiSSitSw.-TM <I-- and the DuPont representative, Andrew S. Hartten. A schedu,le sum m ar.iz.ing .k ey rG'TICSTI tasKs,ssuubDmmitutauluss, ,s*tart and end dates is provided at the end o f this document. G IST M em ber Organizations/Representatives/General Functions WVDEP D avid W atkin s-Groundwater Protection- G IST team leader; escrow funds disbursement oversight; project management and coordinate George Dasher-advisor and technical review D ee Ann Staats, Ph.D.-advisor EPA R egion HI Garth Connor-science advisor Jack C. H w ang - Hydrogeologist Roger Rheinhart-Environmental Engineer DuPont Andrew Hartten-Principal Project Leader/Hydrogeologist-teChnical review, ^ c r m ^ a g le n t and coordination of field investigation activities; escrow funds disbursement oversight. W V D H H R -BPH W illiam Toomey-Manager, Source Water Assessment Program- Bureau for Public Health advisor A-l GIST Team Objectives and Efforts The primary a d e ^S the GIST, the tasks outlined below shall be performed by DuPont or its representatives. Tt uhpe rGIwST ww iillll iissssuu ee aa final no* refportV(s) wnitih. f inad i ndg sthaende xctoennct l u0sfi o ngsr oruengdawr daitnegr groundwater quality m^an ^ GjST final report shall further make contamination m and around anv furtherwork or actions that need to be taken performed by DuPont and the U lb p assessment and C8 impact, plume S i c a t i o S o f the GIST and the Consent Order am met. Those tasks shall be agreed upon by the GIS . Key Tasks of GIST Task A: Groundwater Use and Well Survey/Groundwuter Monitoring o f the W ashington W orks " ^ ^ " ^ n n d w a t " well use survey will * focus efforts along establishedC 8 impact a" d mS ltoowtattSte' G IST ti, m eet, evaluate the data, and detem tine the ninexat c,iomurdsye o7f aTchout.0 The GIST will determine when the final groundwater w ell use survey shall be rdeaSed' DuPont agrees to perform, under the supervision of the GIST and through tacrrppd-tn third nartY a groundwater use and w ell survey identifying and sam pling all groundwater w ells within a 1-mile radius o f the three landfills setfo f ? ^ q iST at, tt; v,- ntnn WnrV<; facility The phased approach m ay be am ended b y the GIST o f quality shag ^perfom V ^ trithlh^ specific purpose A rntrrpntration in water. Should concentrations o f C8 found in " dwatei wells exceed 1 jigfl within the Em ile radius, the GIST w ill determine The water use survey should be in substantially the same format as Attachment B. A-2 3 lev ? S s r ^ : i " 0^ k u life e lfin this Consent O n to for monitoring .0 Be determined By m e G S T . Task B: Assessment ,,tExistingG rm andwater nod Surfnee W ater M onitoring Data 2 fDS el ^ i n 7 S -- ^ d '"X t S w S S S . ' S S h y d r o g e o lo g ic inforoationin order continuing i-- eva,nation of existing historical !> * >* " V have re,area to the Facilities. , Af TacV A the GIST w ill review all the C8 ' Is ,H . ,i Tr r m,,,, orrStiwitip It is anticipated that a summary ot all historical Informaticm for each facility will be submitted to GIST within 60 days of the C onsent Order's effective date. T a sk C: P lu m e Identificatitm/Groundwater Assessment . ohiective. Determine the vertical and horizontal extent o f any and all C 8 impacted Sr011" ' ^ 3^ ^j C?ed^ lr P" -- ^ also tachidJ a iT a K e s ^ e n t^ fC ^ 1*. U n d rilU n d its impact on the Ohio River and pubiic Sanuasa- shollWr i Sr 'm The GG IKSTT m" aatil fIters.t rr e v i e w historical data and rbeesuplrtsioorfitTizaesdktAo atdo, A-3 predUicptoend completion o f investigation activities, groundwater flow and contaminant transport m odels to assess fu P S i Upon review o f all available information and on a schedule to be determined bytheX3IST, the GIST w ill com plete an initial evaluation o f data to e ermme other activities will be on a schedule established by the GIST. activities needed and agreed to by the GIST to catj,' " * GBT be performed by DuPont on a schedule established by the GIST. x S S f a l i modeling performed pursuant to this attachment and the Consent Order ^nT seG rw ndw atM ^M odelm g System, or some other m odel as approved by the GIST. TABLE A"1 then these maps should be for each quarter; if DuPont has several years worth o f data for each site, then these maps can be annual. , C8 concentration contour maps. These should span the entire sam pling life o f the site aftd should b e no less than yearly. If DuPont has only one year's worth o f data tor a given site, then these m aps should be for each quarter; i f DuPont has several years worth o f data for each site, then these m aps can b e annual. , ,. * A ll the C8 groundwater data that has been collected to date. These data should be submitted in easy-to-read tables. These tables should use the method, "<x", to designate all concentrations below the laboratory's minimum detection limit (not "ND " or som e other abbreviation), and they should use "mg/" or "pg/" as th unit designation. . If unable to provide the above data, DuPont shall docum ent the reasons why it is unable to gather and submit the information. __ ______ _-- :------------ ~ T ^ cT sa m p lin g . The sam ples should be taken from all the w ells at the three landfill sites and from a select num ber o l w ells at the W ashington W orks plant. These select w e lls are to be chosen by the GIST before the groundwater monitoring program begins based on evaluation o f h iston e, data/information. The frequency o f sampling shall be monthly for the first four months following the E ffective Date and quarterly thereafter. Any new w ells required fo r monitoring or plume identification purposes w ill be integrated in each site's groundwater monitoring program on a schedule agreed to by the GIST. A-5 I Report o f Results. Reporting should be quarterly and to the W V D EP Groundwater Program at the follow ing address. WVDEP Division o f Water Resources Groundwater Program 1201 Greenbrier Street Charleston, W est Virginia 25311 Re: DuPont/C8 monitoring. Each report should include the following: ' (a) A site location map. (b) A site map showing the groundwater monitoring well locations. (e) A top-of-groundwater map. (d) A C8 concentration map. (e) Groundwater elevation and w ell screen data. (f) A table o f all the historical C8 sampling data. N ote: where available information allows, abbreviations should not b e used to designate N o Detect concentrations and the units "ppb" and "ppm" should not be used. (g) Laboratory analysis sheets. L (h) Chain o f custody records. [ i i A-6 Attachment B Name: Address: GROUNDW ATER WELL USE SURVEY . Phone: _______-- ,-- ---- --...... - -- -- -------- B e s t Tim e to Contact Owner: ____ _ -- -------------- ! . D o you have one or m ore water w ell(s) on this property? (It need not be in use currently.) If no, stop n ow and return survey. Y es --__-- 0 -- County W ater W ell Permit N o. _____-- _ _ ---------- >---------- -- 2 . Is the well(s) currently (circle one) used unused or filled m? 3 . Is the w ell(s) used for drinking water? Y es ------- _ N o _ _ _ 4 . Is this w ell(s) used for other, purposes? If yes, please specify uses below : . 5 . What is the approximate frequency o f use? Circle One. Daily W eekly Monthly Summer 6 . Date last used? ...------- ------------ ----------- -- - 7 . Is there a pump in the w ell? Y es ----------_ N o ___-- . 8. is there a eonditioner, softener, ehlorinator, filter, or other form of treatment for the system ? Y es ______ N o ---------. I f so, what is the form o f treatment? _-- _ -- -- ----- -- ---------- 9 . Iiss tthheerree aannyy faucet w here water d ees not first pass through the treatment system ? Yes No I f yes, is it (circle one) inside or outside? 1 0, What year was the w ell constructed? -- ; 1 1. Please provide the follow ing information regarding the w eil(s) if known: (circle one) A . Total Depth (feet below ground surface): . 30-60 60-90 90-120 120 or more . B. Casing Type: PVC steel stone none other ------ ,------ -- -- C. W ell Construction: dug drilled open or uncased bedrock D . Screened Interval (length in feet): 0-10 10-20 20-30 30-60 60 or more B. Well Diameter (inches): 0-6 6-12 12-24 24 or more B-2 Attachment C C8 ASSESSM ENT OF TOXICITY TEAM A team o f scientists shall be assembled to assess the toxicity and nsk to human ,heaftlltth. aAnd. tthhee eennvvirnonommenxt associa^ted w^ith ecxpgosure to ammoofnTiuomxipcietryflTueoarmooc(CtaAnoTate Nixon, as a representative o f W est Virginia, s citizens. T, _ W VDEP utilizing funds from an escrow account funded by DuPont,- shall Taylor, Ph.D. and Environm ental H by James Becker* o d f t him selt with the city o f C8, the work p e r f o m ^ y T B ^A as described herein, and attend public m eetings to prov.de expert.se pert y x tfp c cV.nl] subcontract w ith the non-profit scientific in risk orgamzatio "" vy E" e ?or R is ^ e s s m e n t (TERA) whose point o f g ph D The TERA shall provide services in toxicology and tasks, and d e t i U . e s are described below. T A T T eam M em b er O r g a n iza tio n siR ep resen tatiyes1/ G en e r a jjjm cfions WVDEP D ee Ann Staats, Ph.D. - Science Advisor - team leader, escrow funds disbursement oversight; project management and coordination, toxicology/risk assessment and communication; Pam N ixon - Environmental Advocate - advisor; Jan Taylor, Ph.D. --contractor administrative oversight, Janies Becker, M .D. (Marshall Univemity) - consultant in risk communication; TESA (point o f contact; Joan Dollarhide, P h .D > consultant in toxicology/risk assessment; quanlif,ic,atio*ns.. * ; * > * * * * . Sl* a i" '' * C-l " `h p' r" " rsimil" DuPont Gerald K ennedy Director o f Applied Toxicology and Health, Haskell Laboratory - reviewer toxicology; escrow funds disbursement oversight; John W hysner, M .D. - toxicology/risk assessment and communications; Paul Bossert - W ashington W orks Plant Manager -com m unications; The follow ing members o f the CAT Team shall act as reviewers or advisors. W V Departm ent of H ealth and Hum an Resources - Bureau for Public Health (W VDHHR-BPH) BWairlbliaarma TTaoyomloeryD-irMe catnoarg,eOr,fSfiocuerocef EWnavtierronmental Health Services advisor, Local reoresentative - advisor; Environm ental Protection Agency (EPA) Headquarters - Jennifer Seed - reviewer and advisor toxicology; R eS, n Samuel Rotenberg, P h .D . - reviewer and advisor toxicology/ risk Garth assessment; Connor-advisor hydrogeology; ' Roger Reinhart - reviewer and advisor Safe Drinking Water A , Cincinnati - John Cicmanec, DVM - reviewer and advisor toxicology; Apencv for Toxic Substances and Disease R egistry (ATSDR) g ^Atlanta - John W heeler, Ph.D. - reviewer and advisor m toxicology/ nsk sssssrflnt* Philadelphia - Lora W emer - coordinator for ATSDR; Non-CAT Team Efforts Other efforts are currently underway which may produce information for J e CAT Team to utilize. The CAT Team will coordinate and communicate closely with th othPT efforts. T hese include: 1. Dupont's air m odeling o f C8 em issions from the W ashington W orks plant; 2. W VDEP's air m odeling o f C8 em issions from the W ashington W orks plant, C-2 uo T a Hazard A ssessm ent w hich sum m arizes the available toxicity information regs " os s r - * - *>*-- " " em pia,ed tom; , A T c n i ) H ea,th Consultation that estim ates the risk to the com m unity associated tu S d " from .he Lubeck Public Service District, .o .he extent com pleted prior to the assessm ent contemplated herein. 5. E xisting C8 concentrations in Lubeck Public Service District data. ,,,, A^,,i,,cic fcpf. GIST activities described in Attachment A ) and W ell S "" B , a. .be residences in .he area o f .he 3 landfills and the Washington W orks Plant. nf CAT Team ThP tasks to be performed by the CAT Team are described briefly in Table 1, and in m ore detail below . These tusks nre discussed below within .he con.ex. o f u Scope of W ork for both Dr. Becker and for T IR A as well. Tasks o f the CAT Team shall be organized into three phases. Phase I il u d e s those task^necessary .0 P ^ ^ ^ T a T m v ie w in f ; ^ a H a b ^ to ^ c h y and e p id w n io fe ^ ^ ^ human health; evaluating existing information relative to ecological heal h n shunXERA ptepare e ^ o r t on .heir findings Phase III includes those tasks necessary to prepare for and h o ld the s ' " d p" bho m eedng T he results o f the C 8 groundwater analysts and n sk assessm ent shall bo presented in the second public meeting. N o communication betw een Dupont representatives and NICS, Dr. Becker, or t p r A S a l be permitted without the participation o f Dr. Staats. All information will be TER^ S n t and JE R A by W VDEP; thus, all information contributed to the g 5 C n f s t l l b e sen, in tripHcate to Dr. Staats for forwarding ,0 D r. Becker and TERA. Phase I TASK A -l: First PublicM eetm g Two public meetings are anticipated for this project. The First Public M eeting sSLahcruattbil.vleeicostkciTecoPsu'urahbinenl idcpPuiShnbeavlrsiitcvei;inIcrgefeotlDrahitetsihntpreguicphbtuilsiwrctpoatortoesicrepasasluroitpnficpfiinolpyrtarm, toieandtbfuiooycrincmnogoionntphgpeetrrhaeCevtArtanoTgtuosTwmcetotahsnmcsoeaafrmn.ttdhrpeaolmtte.hongnesrusanimondfgvsCoul8vi ve,ne y S ' ,, " 'the Groundwater C 8 A nalysis and W ell U se Survey. In order to prepare for th e C-3 Firs. Public M eeting, CAT Teem members shail fam iliar themselves TM th the available toxicological information concerning C8. AA CP AATT TT eeaamm mm eeting shall b elahnelddfiilmls manedditahteelWy parsihoirngtototnheWfiorrstkps uPblalinct,maenedting tsou:r(r1o)uncodntndgurcetsaidseintet,mvjsair< ^ discuss th(4e)toc0x0icridtyfnoafteCa8ndanpdreoptahreer pfoerrttihneenptudbalitca; (3) . comments will be recorded by W VDEP. h e,d and puW ic ,u e s,io n s T A B L E 1- TA SK S OF CAT TEAM T ask A . Public M e , * Perfom O bjective: to n t i t a j t e local , "d " alysis for C8; intent to develop Screening le v e ls; ntonths pass from the firs, public meeting and the CAT Team Final Report has not been issued. P rim a ry Responsibility: Staats_-- r __-r ----- -- ------------: " ^ "\ a - r n _w,MPinnftl T?Rfftrp>nC8 1JOS6fSor C 8 for the i.nhalation and " togesfiontand dermall, if possible) routes o f exposure. carcinogenicity o f C8 will be conducted as well. PT arismka1D^ry:. ERceoslopgoincasliTbDWilaittoy^:RTftEVRIftAeW*. jon to detennine whether sufficient studies have receptors. _ to d e v 5 b p TM -PXTrr#ar--i*sm*kr*ra*Erry'J R*Dreasaf-pt-oR--ne--ps--oi-b-riatlni.tar.yr.n.:d.T.F.FEiin'nRaaAl"lR eport O bjective: to present and discuss the results o f the above tasks. Primary Responsibility: TERA cri,eria fo r e" Phase II Tasks R r . T). and E D evelpm n g D tg fB m s jp n al Reference P o se s a nd Screening Levels, and Risk Assessm ent In Phase II TERA shall conduct the toxicological and risk assessm ent activities^ After having reviewed the toxicological information regarding C8 PTMv.ded by W VDEP, TTreEFgRRarAAdissnhhgaailltlls ccpoornnosspuimoltsewwdiutanhp tox pro iaccohlofogristths o is n the CA project, TFruoTnlleoawmi,nagsscuocohrdcoinnastueldtabtiyo. nD,rT_ SEtRaaAts, C-4 shall develop Provisional Reif enc! ^ ^ for water, soil possible) routes o f exposure. Then TE t f r a shall perform one general -risk *assessm ent invoflv*ing com panson o f exposur the three landfills and die Washington W orks Ptan. . ,P,0,,s ebe]ii nSge,,Lj ceevels fo , ^ DreissitdreicnttswaTtehrissurpispklya,stsheastsmfoecnutseshs aolnl icnucrlruedne: (1) identificat.ion Dofi reasonably anticipFated land use, surface water and g^oundwate* identification o f exposure pathways, ( ) and (5) Screening Levels. TERA shall uwgotreioll,iul,znuedsdweaastauterorvbeCtya8;inctuheo,de,,n.ncf^reuoEnimttrPPatAAthioe'sn<ioDsDthirnrearrfetesHlHxidaezanrtidalAasnsdespsumbaelvincati;wlaaebn,l1dllse AirnrTeefsosSiridDdmeeRnantttsiiiaoarlnileggtaroronodunentdewrmatienre Consultation (if available). TERA also snau re * collected to develop whether sufficient studies have been Pr^ ^ 6^ ^ ^ | ^ j a^ y ^ u a tic life. T E R A screening en ten a for protection o f ec ^ h . disQ^ es the reSults o f their efforts and shall prepare a draft and a find docum o fthe CAT Team and other SSSw 3 elucidate the toxicity o f C 8, Phase TT1 Second Public M eeting i= = S S B S = -- also The W VD EP Will address any further actions that m ay be necessary. C-5 SCOPE OF W ORK FOR JAM ES BECKER, MJ>. Dr. Becker is a medical doctor specializing in environmental health at the _ Marshall University School o f M edicine Center for Rural and Environmental Health. He w ill be assisting the W VDEP in his specialty area o f risk com m unication at the two below. " kS 8SSigned ,0 ^ B ' Cker " d" Phase I Task A -l: First Public M eeting D r Becker w ill assist in preparation for the first public m eeting, and attend the m eetin gW ritin g expertise in risk communication . H e w ill familiarize him self with the data, which w ill be provided to him b y W VDEP, with particu ar emphasis on the d em io lo g ica l studies. N ote that the already ^ been summarized in the Draft Hazard A ssessm ent prepared b y U SE PA . N o literature S " ocum ert retrieval w ill be required. Specific subtesks reqmred Phace I to prepare for the first public meeting are described below. Subtask 1 - Familiarization with toxicological data provided by W VDEP including but not limited to: a. 8 compact discs o f information provided to U SE PA under TSCA by 3M Corp (note only a small portion o f this inform ation concerns C8); b. Draft Hazard Assessment document from USEPA; c. ACGIH Threshold Limit Value (TLV). d. Journal articles and other information provided by W VDEP. Subtask 2 - Attend a m eeting prior to the first public m eeting to: . a. conduct a site visit o f the 3 landfills and the W ashington W orks Plant, and local residential areas; 1 b. c. discuss and prepare an agenda; discuss the toxicology and risks associated w ith _ C 8 with the ' other /C-*Aa Tt Tt ewa m members. Subtask 3 - Attend First Public M eeting Phase III Task A-2 Second Public M eeting Dr Becker will assist in preparation for the second public m eeting and attend the meeting providing expertise in risk communication. The follow ing subtasks w ill be required: Subtask 1 - Familiarization with the toxicological and risk assessment report prepared by TERA; C-6 Subtaska2. - dAisttceunsds athme etoetxiincgolPogTMy a*nd risks a>ssociated wwiTmh ' S ^ t h the ether CAT Team members; b. discuss and prepare an agenda. Subtask 3 - Attend Second Public M eeting Scope o f Work. C-7 SCOPE OF W ORK FOR TERA ' TTEERR AA ((TI ox- ico.logf y E xcellence for R 'issik, Aasssseessssmmeennttp) rios caesnsonto-pfrinodfitcoormgmanoiznation that applies sound toxicological dat government groups, TERA w ill be pgrroouvniddinbgetswereveniceesnivnirtooxntmcoelnogt,yinand n * assessment T1ERAA s^cientists wil^l be d e v e l o p i n g r i s k S e " k p l t b l i e 'sendce District water supply and the W a T h t a " . The specific tasks assigned to TERA are described below. Phase II Tasks B, C, D, and Et Development of Provisions Reference Doses and Screening Levels, and General Assessment of Risk - , ct U*f SVW1 VTDEFRP ANSotalfiftWerailtlufaremsieliaarrcizheotrhdeomcsuemlveenstwreitthriethvaeltwoxilicl obleorgeiqcuailrdeadt.a following; i>ro" d e d r e R A sha" M u d e " is " 0' lim W ,0 a. 8 compact discs of information provided to USEPA under T ^ A by 3M c ir p (note only a sm all portion o f this inform ation concerns C 8), b. c. USEPA Draft Hazard Assessm ent for C 8; Journal articles and other information submitted to W VDE bv y DuPont. Subtask 2 -T E R A staff will: a. dli de ve enltoi fpyi nagll possib Refere le nc critical toxicological e D oses for the oral, studies suitableTor inhalation, and derm al ( i f b. c. m eeting a, be TERA facility in Cincinnatk Ohio, p r e se n t tthoexiircofilnodgiinstgssains csouobrtdaisnka2te-da banydD2r-.bS,taanadts;consult w ith CA T Team d. finalize Reference D oses and Screening Levels based on recommendations o f the CAT Team toxicologists as coordinated by Dr. Staats. O KI le 1 TFR A shall conduct one general risk assessm ent for the three ,sau,,pbpffllyl5bSa^sed on current risk to human health. T h.s risk assessm ent snail met a) identification o f reasonably anticipated land use. surface water and groundwater uses; C-8 ' bc)) iiddeennttiiffiiccaattiioonn ooffreexcpeopstuorrse;pathways; ret')i icdoemnptiafirciasotinonofoefxepxopsousruerecocnocnecnetnrtartaiotinosntso; app, ropn_ate S_creeni.ng Levels; TERA shall utilize the following data in the risk assessment process: a) air modeling data from DuPont, b) air modeling data from WVDBP, d) for residential effects from exposure to C8 in public supply drinking wa er. c .. , , XPRA , hau review the ecological data and determine whether there is o f ecological health Jor -- fOT-- c o m Spurbteas"k 5e -p ToE^RAf tshaanldl cAomvpeirlesiaonndsd)i,scwuhsiscthhea,rseosureltfserosf,toheanadbporvoemtadsekssainbtnoeaf summary of the following: %a) USEPA's Draft Hazard Assessment of C8; b) DuPont's air modeling data; Analysis and Well Use Survey of e) LAoTcaSlDRResHideeanltths,CaonndsLulutbaeticoknPthuabtliacssSeesrsveiscepoDtiesntrtiiactl;health effects from ; exposure to C8 in public supply drinking water, if available. Additionally, ^ furtto^lua^tT^^oxicity of carcinogenicity of C8 in rats to humans. C-9 Riirai ACCESS RoAiJ:L - \' . LETART LANDFILL =; -. ! ,-i V OS' JP ./ -V ' x' .y c~ / l y ;l ' f -X ^ . >v ,.f ; r : ^ .1 fr ,. ~ ; *' *l`A** t ^ * ; -r ' ' i,.. ; * ?. '** *. . *.*8* * : f.l _) . *. * sauneti ncir hwcr, w -owo bumranb . . . L l / j U . r . F:_ !;, 2000 M2il5n* n\ t. V" it* 'Ji4, . 'VVV-. v.V, \ r.t ^-X' tl-` - *'<v . ..i. * X. S i - V .^Vw*r'rtl 'uV1-* \!:* v .v : -~Vo;v-V..^ i - ** / #M?-l* / SCALE 0 2000' iCl fo.rpl orata Ramidlatlon Gr*oup M* Andana* J A tP tn g * iU t TX# 1T~C J&USHMuH C r o u p EXHIBIT 2 SITE LO C A TIO N M AP -ertali Landftli Site Porkerhurg, WV n/ti/k*LAC#taA "*1**Ta B*Tt rCBKS) yvvnT6--Dl ein7fr2MiAA063 *" * 1 EXHIBIT 3 \