Document ZBeYZ0kD6715oLz5wRkY4dJ98

ARBRE -- 1416 SAMPLING INVESTIGATION RESULTS LITTLE HOCKING WATER ASSOCIATION WELL FIELD WASHINGTON COUNTY, OHIO Date: April 2003 Project No: 714889283762.00010 am `CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 `Wilmington, Delaware 19805 000302, `Samping nvestgatn Resuts ____ Tableof Contents TABLE OF CONTENTS BROUIVE SULIILY consmssmsmsssssmmsmmsmmmns ori 1 TH mmm) EE TO -------- 21 ClO mmm ----) 22 BSrogtoloYommmmmmmmmmmmmmmme------------d 3.0 Sampling APPIOGCh rr wsssmmm----"-- 40 Groundwater Sample Results.............. ss------rlh 4.1 C-8 in Groundwater from Temporary BOTINgS ..........veor 6 42 C-8 in Groundwater from Production and Test Wells......... n 4.3 Groundwater Elevations in Production and Test Wells and Ohio River 50 Soil SampleResults ------------------ rd 60 SiteConceptual Model. ---------------- orn 10 Ef CuchosYupsmmmmmmammmmmssmmmmmrstl C2 SURG minis m------ 10 63 C-8 Transport Mechanisms and Migration Pathway.......... rn] 7.0 Conclusions and RECOMMENGRONS verre 13 TE cS TABLES Table 1 C-8 in Groundwater from Temporary Borings Table2 Cin Production and Test Wells Table Groundwater Elevation Data for Production and Test Wells August 21, 2002 Table4 C-8 in Soil from Temporary Borings UtSieportt Agr 17.03 Weeinggom, 5 P 000303 `Samping Investaton Resuts Table of Contents Figuel Figue2 Figue3 Figued4 FigueS Figue6 Figure? Figure8 Figured Figure 10 Figure 11 Figure 12 Figure 13 Appendix A Appendix B Appendix C FIGURES Site Location Map Production and Test Well Locations C-8 in Groundwater - January 2002 Idealized Ohio River Valley Cross-Section and Block Diagram Generalized Geologic Cross-Section at River Mile 190 Temporary Boring Locations C-8 Concentration Ranges in Groundwater Groundwater Elevation Contour Map -- August 2002 C-8 Concentration Ranges in Soil Cross-section Location Map Cross-section A-A" Cross-section B-B" Cross-section C-C' APPENDICES C-8 Analytical Reporting Geologic Logs for Little Hocking Water Association Well Field `Temporary Borings Geologic Logs for Production and Test Wells (Provided by Little Hocking) Usswgort cro Wissen. 0% 000304 `Sampling Investigation Results Executive Summary EXECUTIVE SUMMARY DuPont conducted a field investigation ofthe Little Hocking Water Association well field in August 2002 in order to delineate ammonium perfluorooctanoate (C-8) concentrations in soil andgroundwaternear atest well, TW-4. Groundwater sampled from TW-4 in 2002 showed a C-8 concentration range of 12.3 to 37.1 ug/L. This report summarizes the `work performed, presents results, and provides conclusions and recommendations. Recently, pursuant to a multi-media consent order issued by the West Virginia Departmentsof Environmental Protection and Health and Human Resources to DuPont on November 15, 2001 (Order No. GWR-2001-019; Consent Order), DuPont had submitted summary reports to the Ohio Environmental Protection Agency detailing the off-site investigation activities near the Washington Works facility. These reports assessed media-specific C-8 transport from the facility and concluded that migration of air emissions is the only probable transport mechanism for C-8 found in the Little Hocking Water Association well field. `The field investigationof the Little Hocking Water Association well field focused on delineating depth-specific C-8 concentrations in soil and groundwater near TW-4. Concurrently, additional geoprobe borings, test wells and production wells were sampled in order to develop a site conceptual model for deposition and migrationof C- in soil and groundwater at the Little Hocking Water Association well field. The following conclusions are drawn from the investigation results and other available data: Q All groundwater results are below the C-8 Assessment of Toxicity Team (CATT) `established human health protective screening criteria for water (water C-8 SL; 'WVDEP 2002)of 150 ug/L. Q The C-8 concentrations in groundwater decreased with depth within the aquifer. `The C-8 concentrations in groundwater at the topofthe aquifer, within the silty. clay, ranged from ND (<0.01 ug/L) to 78 ug/L, while C-8 concentrations at the bottomofthe aquifer, within the sand and gravel, ranged from ND (<0.01 ug/L) to 8.58 ug/L (excluding results for TW-4) Q Consistently high pH values measured in TW-4 and other field observations indicate that failed grout this seal test or to well's construction is a failed well casing. likely compromised, possibly Higher concentrations of C-8 due to a measured in this well (ranging from `groundwater that contains 12.3 to higher 37.1 C- ug/L) are likely attributed to shallow concentrations migrating downward into the deeper monitoring zone or into the well itself, which could happenifthe grout seal well or the well casingwere to have failed. C-8 concentrations are not likely to be truly representativeof the deep aquifer. measured in this Q Drinking water is pumped from the bottomofthe sand and gravel aquifer through the four production wells. The highest C- concentration measured in the four production wells was 8.58 ug/L, significantly lower than the human health protective water C-8 SL. The C-8 results for finished water, acombination of LwSo t1 Apr. 17,03 000305 "J `Samping imestgaton Resuts Executive Summary waters from the production wells that is distributed to Little Hocking customers, ranged from 1.69t0 4.29 ug/L, also significantly lower than the water C-8 SL. Q All soil results are below the CATT-established human health protective screening criteria for soil (soil C-8 SL) of 240 mg/kg (WVDEP 2002). The highest soil C-8 concentration measured is 170 ug/kg (0.170 mg/kg). Most results for soil sampled below the water table are nondetectable. Q Overall the very low concentrations of C-8 measured in the soils indicate that C-8 does not readily adsorb to soil, especially soils below the water table. Q C8 results for soil and groundwater sampled immediately adjacent to TW-4 do not distinguish this test well as a source for higher C- concentrations in soil and groundwater. Q Overall, this investigation as completed, combined with the air emission modeling and groundwater modeling results and the available physiochemical data for C-8, are sufficient to understand the migration pathwaysof C-8 from the Washington `Works facility and within the Little Hocking Water Association well field. Q Revised groundwater modeling by DuPont supports the previous conclusion that no potential groundwater migration pathway exists beneath the Ohio River to the Little Hocking Well field. Q Based on the current data available, DuPont believes the following pathway does exist. C-8 from the DuPont facilityistransported via air emissionsbywind and is deposited on the Little Hocking well field surface soils. Precipitation then leaches tthheenCm-i8grdaotwenswwairtdh gthrroouungdhwattheerunwsiatthuirnattheedazqounifeert.o tGhreoauqnuidfwear.teDricsosnotlaviendinCg-8low levelsofC-8 is then pumped from the aquifer through the four production wells. `Water from the production wells is mixed and the finished water, containing even Tower levelsof C-8, then enters the Little Hocking Water Association distribution system. Q This investigation as completed, combined with the overall understandingofC-8 migration pathways within the Little Hocking well field, is also sufficient to understand the distribution ofC-8 in the test wells, including TW-4, in the production wells and in the finished water that enters the Little Hocking distribution system. Q Inorderto assess the impactofrecent C-8 air emission reductions at the `Washington Works facility, DuPont recommends continuing quarterly monitoring of C-8 in the four Little Hocking Water Association production wells and finished water foar period oftwo years. WSimiingptoen, OAFgr 17.03 -- 000306 W `Sampling nvesigaton Resuts ~ Introduction 1.0 INTRODUCTION Pursuant to the multi-media consent order issued to DuPont on November 15, 2001 (Order No. GWR-2001-019; Consent Order), groundwater was sampled at public water supplies (PWS) along the Ohio River in West Virginia and Ohio. Groundwater was sampled to determineifreleases of C-8 from the DuPont Washington Works facility P(lWocSatseadmipnlWiansghwiangstpoenr,foWremsetdVuinrdgienriath)ehdaivreecitmiponaocftetdhegrGoruonudnwdawtaetreirn ItnhveePstWiSg.atiTonhe Steering Team (GIST) which was established under the Consent Order. The Little `HWoacskhiinnggtWoantWeorrAksssofcaicaitliitoyniwneWlalsfhiielndg,tlooncaCtoeudnatcyr,osOshitohe, OwhaisoiRnicvleudrefdrionmtthhise sampling. The locationsof the Little Hocking Water Association well field and the DuPont `Washington Works facility are shown in Figure 1. Four production wells at the Little Hocking Water Association well field (LHPSD1 through 4)weresampled in December 2001. The C-8 concentrations measured in the production wells ranged from 0.844 t0 7.66 ug/L. To better understand the distribution of C-8 in the Little Hocking well field, a more extensive sampling event was conducted in January 2002, that included the sampling of finished water (the water distributed to tceussttwoemlelrss)inatnhdebwoeolsltefirelsdt.atiTohneslaomcpaltiinognsopofintthse, parnoddgurctoiuonndwaantdertesftrwoemllalslsparmopdlucetdiionntahned Little Hocking well field are shown in Figure 2. A totalof 19 groundwater samples, including one duplicate, were collected and analyzed from Little Hocking during the January 2002 sampling event. The concentrations ofC- Cin-ficnoinscheendtwraatteironasnmdebaosousrteedr sftoarttihoen psraomdpulcitnigonpowienltlssrraannggeeddffrroomm10..6794t4o101.69.42u2g/uLg/.L.The 4`Th(eTWC--48),retsuhletcsofnocrenntirnaetoifotnhmeetaesnurteesdt wwealsls37r.a1nguegd/Lf.roFmig0u.r3e643 tsoh4o.w4s8tuhge/LJ.anuInartyes2t0w0e2ll TdiWst-r4ibcutoimopnoarfeCd-t8ortehseulstusrrinoutnhdeipnrgodwuelcltsi,onthaenOdhtieostEwnevllisr.onBmeansteadloPnrottheecetlieovnaAtegdenrecsyult at (OEPA) requested that DuPont conduct a focused field investigation to delincate C-8 concentrations in soil and groundwater near TW-4. Tn August 2002, DuPont conducted the field investigation at the Little Hocking Water Association well field. During this investigation, the following activities were performed: Q Advanced ten temporary soil borings Q Continuously monitored geologic information during the advancement of the ten temporary borings Q Sampled soil depths within and the groundwater and monitored temporary borings groundwater parameters at various WSiineipngoornt, OAFer 17.03 000307 1 `Sampling Investigation Results Introduction Q Sampled groundwater in all production and test wells and recorded groundwater elevations Q Measured Ohio River stage `The C-8 Assessmentof Toxicity Team (CATT), was assembled as required by the Consent Order to establish human health protective screening criteria for water (water C8 SL) andfor soil (soil C-8 SL). In August 2002, while the field investigation was being conducted at Little Hocking, the CATT issued its final report and established the water C-8 SL at 150 ug/L and the soil C-8 SL at 240 mg/kg (WVDEP, 2002). Following the completionofthe field activities at Little Hocking, groundwater samples `were analyzed to measure C-8 concentrations. C-8 analytical results for groundwater `were then compared to the CATT-established water C-8 SL. In August 2002, an analytical method for measuring C-8 in soils was still under development; therefore, soils `sampled during the investigation were placed on-hold in a secure manner. The method development was completed in February 2003. C-8 analytical resultsfor soils were finalized in March 2003. C-8 analytical results for soil were then compared to the CATTestablished soil C-8 SL. The analytical results were then evaluated in conjunction with geologic data available from Little Hocking Water Association and with geological data obtained from the temporary borings. A site conceptual model was then developed. `Thisreport documents the field investigation activities and the resultsofthe investigation. In this report, the following sectionsare discussed: Q Environmental Setting (Section 2) Q Sampling Approach (Section 3) Q Groundwater Results (Section 4) Q Soil Sample Results (Section 5) Q The Little Hocking Site Conceptual Model (Section 6) Q Conclusions and Recommendations (Section 7) Q References (Section 8) T r WTionre gt og 717 eer 000308oti 7 `Sampling Investigation Results. Environmental Setting 2.0 ENVIRONMENTAL SETTING 21 Geology `The Little Hocking well field is located in the Ohio River Valley and consists of Quatemary alluvial sediments that overly the Permian-aged Dunkard Group. The two predominant faciesof the Ohio River alluvium that have been identified in this area include coarse-grained Ohio River Alluvium (Pleistocene-aged glacial outwashdeposits) and fine-grained Ohio River Alluvium [Holocene overbank deposits (Simard, 1989). `The Pleistocene deposits consist primarily of coarse-grained sand and gravel while the Holocene deposits consist primarilyofinterbedded and laminated silt, clay and finegrained sand. The Dunkard Group (bedrock)consistsprimarilyofred and varicolored sandy shale; gray, green and brown sandstone; gray and light-gray siltstone; and minor `bedsofcoal, claystone, black carbonaceous shale and limestone. `The faciesofthe Ohio River Alluvium formed in response to the glacial advances and retreatsofthe pre-, early- and late-Wisconsinan and were deposited as successive phases ofaggradation and degradation ofriver valley alluvial materials. Thecoarse-grained Pleistocene alluvium was deposited as glacial outwash during the primary valley `aggradation event following the glacial scouringofthe valley into the bedrock floor. During the subsequent degredation and aggradation cyclesofthe Pleistocene, theglacial outwash sediments were partially removed, re-worked and then redeposited to a lower elevation than the previous cycle, thus forming a terrace. This process formed a series of Pleistocene-aged terrace surfaces within the Ohio River Valley. These surfaces were designated (youngest to oldest) as S4, S5, and S6 by Simard. With each`subsequent degredation/aggradation cycle, additional fines were incorporated into the Pleistocene deposits due to continual influx of finer-grained fluvial sediments from tributariesof the Ohio River. As a result, the Pleistocene deposits become more `highly re-worked and progressively finer-grained toward the centeroftheriver valley, particularly in locations downstreamofsignificant tributaries (Simard, 1989). The total thickness ofPleistocene sediments at Washington Bottom (located immediately south across the Ohio River from Little Hocking in West Virginia) ranges from about 80 feet beneath thehighest Pleistocene terrace surfaces to about 15 feet beneath the current channel of the Ohio River. `The Pleistocene alluvial deposits are overlain by the finer-grained Holocene sediments. `The silts, clays, and fine sands were deposited on the surface ofthe Pleistocene terraces as well as on a series ofmore recent floodplains, which formed in the cenotfethre Ohio River Valley during the Holocene. The thicknessofthe Holocene sedimentstypically ranges from 5 to 15 feet over the Pleistocene terrace surfaces and 25 to 35 feet over the Holocene floodplains. Simard designated the Holocene floodplain surfaces as S1 through $3 and the modern floodplain of the Ohio River as S0. Figure 4, modified from Simard (1989), is a block diagram and idealized cross-section through the Ohio Rivervalley dfeoprimcetdinign tthhe cvoamlepyl.ex set of Pleistocene terraces and Holocene floodplains which have Smee wineoe 000309 `Somping investigation Results Environmental Setting AfieglednienraOlhiizoe,dtnhorrotuhg-hsotuhtehOchrioossR-sievcetrioanndfraocmrotshsetLhiettWleasHhoicnkgitnognWWaotrekrsAsfascoicliitayt,iiosn well pHroelsoecnetneed isinltFiagnudrcel5a.y oTvheisrbcarnokssd-espeocstiitosn osvheorwlsyitnhgetfhleoPoldepilasitnocaennde staernrdacaendsugrrfaacveesl, the outwash deposits and the re-worked Pleistocene alluvium in the centerofthe river valley. `The alluvial terrace deposits are underlain by a flat, river-scoured bedrock surfaceof the Dunkard Group that rises steeply and forms the valley walls to the NorthofLittle Hocking Water Association and to the southofthe Washington Works facility (Figure 1). 2.2 Hydrogeology GOrhoiuonRdiwvaetrearllsuuvpipallietesrirnactehederpeogsiiotns.arHeoowbetvaeirn,edthferosmattuhreatDeudnpkoarrtidonGorfoutphebOedhrioocRkiavnedr alluvial terrace deposits comprise the principal regional aquifer used for water supply purposes. Production wells completed in this aquifer have been known to yield up to 500 gallons per minute (Schultz, 1984). Based on these high yields, numerous industrial and commercial water supply companies obtain water from the alluvial aquifer. `aTqhueifOehriooccRuirvseratAallduevpitalh oAfqu1i5fetro i3s0tfheeeptrbiemlaorwygwratoeurn-dtasbulrefaacqeuiifnerthienLtihtetlaereHao.ckTihnigs well field. The saturated zone is approximately 30 to 40 feet thick, extending approximately 10 the surfaceofthe underlying Dunkard Group bedrock. Numerous pumping tests have been completed in the alluvial aquifer in the Washington Bottom areaaspartofwater supply investigations. The hydraulic conductivityofthe alluvial aquifer in the area tByuprigceasllsy&raNnigpelsefLrtodm,1109088t)o.30I0n cfo/ntdra(sLte,ggtgheethtyed,rBaurlaischceonadr&usctGirviathyaomf,thInec.u,n1d9e8r6l;ying Dunkard 2001). Group bedrock aquifer is typically between 0.05 and 5 fd (Kozar and Mathes, Natural recharge to the alluvial aquifer comes from various sources, including: Q Infiltration ofprecipitation falling directly on the alluvium Q Lateral movementofthe river water through the alluvium Q Seepage from stream tributaries that discharge to the Ohio River Q Surface run-offfrom the outcrop areas of the Dunkard Group, which form stecp slopes adjacent to the uppermost Pleistocene terrace. sWitminegomn. ror -- -- a 000310 `Sampling Investigation Results Sampling Approach 3.0 SAMPLING APPROACH In order to evaluate the elevated C-8 concentrations in TW-4, DuPont implemented a fcoonccuesnetdrastaimopnlsininggarpopurnodawcahttehratnedaerlitnheiatteedsthowreillz.ontTahlilsysaanmdplveirntgicpallalny twhaesC-d8e.veloped with assistance from the OEPA and was submitted to and approved by the OEPA in carly AinugFuigsutr2e050.2T(WD-uP4onwta,s2u0s0e2da)a.s tThheecelnotcaetripoonisnto,fatnedmpsoirxarraydibaolrsinagmsplaidnvgansceegdmeanrtesswheorwen established north, northeast, southeast, south, west, and northwest. Along each segment, soil and groundwater or only groundwater were sampled from the temporary borings. Figure 5 shows the locations of the two borings where soil andgroundwaterwere stawmopbloerdinagnsdwthheerleocsaotiiloannsdogfrothuenediwgahttebrorwienrges swahmeprleeodn,lsyagmrpoluinndgwwaatserplwaansnesdamaptltehde. In following depths from ground surface. Q Soil atthe surface at 5-foot intervals below ground surface to the top of the sand and gravel `aquifer (approximately 30 feet below grade) at 5-foot intervals from the top of the sand and gravel aquifer to the bottom of the aquifer (estimated at 50 to 55 feet below grade) at the geologic interfaces Q Groundwater at first encountered water (approximately 17 to 20 feet below grade) at 5-foot intervals from first encountered groundwater to the bottom of the + satatnhdeagnedolgorgaviecliantqeuriffaecres(estimated at 50 to 55 feet below grade). At all other temporary boring locations, groundwater sampling was planned at two. depths, at first encountered water (approximately 17 to 20 feet below grade) and at the. `bottomofthe sand and gravel aquifer (estimated at 50 to 55 feet below grade). wInhiacddhitiinocnl,udDeusPsoanmtplsicnhgedtuhleefdotuhrepCroondsucetnitoOnrwdeelrl-sreaqnudirTeWd-34Q0at2LPitWtlSe Hsoacmkpilnign,gteovent, coincide with the field investigation. The Little Hocking test wells, that are not required `sampling points in the quarterly PWS sampling, were sampled as part of the field investigation, including TW-1 through TW-6 and TW-9 through TW-12 (Figure 2). Groundwater elevations were measured in the test and production wells prior to sampling. the wells. Ohio River stage was also measured using the datum located on the Kraton Polymers property, located immediately east of the Little Hocking well field, with the assistanceof a Senior Environmental Engineer from Kraton. TWienioegp onn, OF es . 000311 Somping vestigation Roots Groundwater Sample Results 40 GROUNDWATER SAMPLE RESULTS For groundwater sampled from production wells, test wells and the temporary borings, `sampling was conducted as described in the Quality Assurance Project Plan (DuPont 2002b) and in the Sampling Investigation Plan for Litle Hocking Water Association Well Field (DuPont, 20024). Appendix A provides information on C-8 analytical reporting 4.1 C-8 in Groundwater from Temporary Borings Groundwater sampled at various depths from the ten temporary borings was analyzed for C8. Table 1 presents the C-8 results for the groundwater samples. The first partofthe. sample name indicates the investigation and the sample type (WWO-G; Washington Works, Ohio, groundwater). The second partof the sample name indicates from which temporary boring the sample was collected (i.c. LHWAN is boring LHWAN-1; see Figure 6 for temporary boring locations). The third part of the sample name indicates the depth below ground surface from which the groundwater was sampled. Figure 7 shows the range in C-8 concentrations measured in eachofthe temporary borings. In total, 18 samples (including one duplicate sample) were collected from the ten temporary borings (Table 1). Samples of first water encountered were collected from all ten borings. Samples from greater depths were collected from three borings. At the boring closest to TW-4, LHWASW-1, samples were collected every five fect from the first water encountered to the bottomofthe sand and gravel aquifer. Note, not all planned sampling was completed. The field investigation proceeded slower than expected due to changing field conditions (stabilizationoffield parameters, particularly turbidity, took much longer than anticipated) and interruptions by the oversight consultant. As a consequence, not all groundwater and soils targeted in the work plan were sampled. `The C- concentrations measured in the groundwater sampled from temporary borings ranged from non-detectable (<0.01 ug/L; ND) to 78 ug/L and do not exceed the CATTestablished human health protective water C-8 SLof 150 ug/L. In general, C-8 concentrations are higher at the fist water encountered than at greater depths within the aquifer or atthe bottomof the aquifer. The distributionof C-8 vertically and horizontally within the well field is discussed in detail in Section 6 which presents the site conceptual model for C-8 in soil and groundwater at Litle Hocking. 42 C-8in Groundwater from Production and Test Wells `Table 2 presents the PWS sampling C-8 results for the Little Hocking Water Association. `The data for the well field investigation conducted in August 2002, including the data from the four production wells and all ten test wells are highlighted in blue. At the bottomof Table 2 are data from finished water and booster station sampling points `Theseare samplesof the water that is being distributed to Little Hocking Water Association customers. Finished water was inadvertently not sampled during the well Tor ros Waite Oi -- 5 000312 `Sampling Investigation Results Groundwater Sample Results field sampling. Table 2 also provides data from the 4Q02 and the 1Q03 PWS sampling events in which thefour production wells, TW-4 and finished waterwere sampled. During the well sampling and PWS sampling, allof the C-8 concentrations measured in the production and test wells and in the finished water were well below the water C-8 SL of 150 ug/L that was established by the CATT (WVDEP, 2002). Figure 7 shows the rangeofC-8 measured at each production and test well using all the data for each well summarized in Table 2. The highest concentrationof C-8 measured in a production or test well, excluding TW-4, was 8.58 ug/L. C-8 concentrations measured in TW-4, which was the focusofthis investigation, have been variable. The C-8 concentration in this test well has ranged from 12.3 0 37.1 ug/L. `These levels are higher than in any other test or production well in the Little Hocking well field. However, field and laboratory measurements and field observations, discussed below, suggest that the integrityofthis test well is compromised. `Table 2 provides the pH data for the groundwater sampled collected from the production and test wells. The pH measured for all production and test wells, exceptforTW-4, has ranged from 6.72 to 7.94. However, the pH values measured in TW-4 are much higher, and have ranged from 9.22 to 12.61. High pH values are commonly associated with cement-bentonite grout (Colangelo et al. 1986). Bentonite, which is commonly used as grouting material in well construction, is a clay mineral containing calcium, aluminum and iron. A comparisonofgroundwater analytical results between TW-4 and Well #2, oneofthe four production wells, also shows that `TW-4 has approximatelytwiceas much calcium and three times as much iron and aluminum than Well #2 (OEPA, 2002). Field activities show that a three-inch pump that fits in the upper portion of the below- surface PVC pipe of TW-4, gets stuck in the PVC pipe at depth. The one and one half- inch pump, on the other hand, can be lowered to the bottomofthe well. This observation indicates that the PVC pipe is not completely straight. A bent PVC pipe may indicate a problem with the joint between lengthsof PVC pipe that could allow grout contamination into the well. Furthermore, particlesof acrusty, white material, which may be grout, are frequently found on the pump when it is removed from the well. In addition, water from TW-4 also is frequentlay milky to grayish color. `The consistently high pH values, water chemistry, and other field observations from this `well likely indicate the integrityofthe well is compromised, most likely bya failed grout `sealor a failed well casing related to the bend in the PVC pipe. A failed grout sealor a failed well casing would allow shallow groundwater, which contains higher concentrationsof C-8, to migrate into the deeper monitoring zone and would result in unusually high C-8 concentrations in the test well compared to C-8 concentrations measured in other production and test wells. Becauseofthe compromised integrity of TW-4, it is likely that samplesofgroundwater from this well are not representative of typical conditions within the deeper portionsofthe sand and gravel aquifer. FE imsen 0% 000313 Samping Inesigaton Resuts Groundwater Sample Results `The distributionofC-8 in the production and test wells in the Little Hocking well field is discussed in detail in Section 6, which presents the site conceptual model for C-8 in soil and groundwater in the Little Hocking Water Association well field. 4.3 Groundwater Elevations in Production and Test Wells and Ohio River Stage `Groundwater elevations were measured in all production and test wells sampled in the Little Hocking well field. In addition, the Ohio River stage was measured. Table 3 provides the surveyed measuring point elevationsofthe production and test wells, the depths to water measured and the calculated groundwater elevations. The Ohio River stage is also presented in this table. Figure presents the groundwater elevation contour mapofthe Little Hocking well field for August 21, 2002. The pumping ofthe production wells results in the development of a coneofdepression surrounding the production wells with groundwater flowing towards the production wells from all directions. Becavse the four production wells are cycled on and off, the coneofdepression shift its position depending on which production wells that are pumping at the time. Groundwater elevations and flow directions within the Little Hocking well field aquifer are discussed in more detail in Section 6, which presents the site conceptual model for C- in soil and groundwater at the Little Hocking well field. WUiisniiepnogr,t 0A8pr 17.03 -- 000314 8 `Sampling investigation Results Soil Sample Results 5.0 SOIL SAMPLE RESULTS For soil sampled from the temporary borings, sampling was conducted as described in the. Sampling Investigation Plan (DuPont, 2002b). In total, 22 soil samples, including one duplicate sample, were collected from two temporary borings, LHWASW-1 and LHWANW-1. Table 4 provides the sample names, sample dates, the C-8 concentration measured and comments. The sample nomenclature is similar to that employedfor the groundwater samples. The first partofthe sample name indicates the investigation and thesample type (WWO-S; Washington Works, Ohio, soil. The second partofthe sample name indicates from which temporary boring the sample was collected (i.c. LHWASW!1 is boring LHWASW-1). The third partof the sample name indicates the depth below ground surface where the sample was collected. The Comments column, on the far right, provides abriefdescriptionofthe sample. `The C-8 concentrations measured from the two borings ranged from ND (<2 ughkg) to 170 ug/g in LEWASW-1 and from ND to 10 ug/kg in LHWANW-1 (Figure 9). In general, the concentrationsofC- measured decreases with sampling depth in bothof the temporary borings. The C-8 concentrations measured in soil from the temporary borings are significantly lower than the human health protective soil C-8 SL (240 mg/kg or 240,000 ugg) that was established by the CATT (WVDEP, 2002). Cdet8aicloinnceSnetcrtaitoinon6s, wmheiacshurperdesienntsosiltshefsriotme ctohnecLeiptttulealHomcokdienlgfwoerlCl-f8ieilndsaorile dainsdcussed in `groundwater at the Little Hocking Water Association well field. Ay 7.03 0003S 5 Sampling Investigation Results Site Conceptual Model 6.0 SITE CONCEPTUAL MODEL 6.1 Geology Using the geologic data available from the temporary borings and the production and test `wells, three cross-sections (A-A', B-B', and C-C")were generated for the Little Hocking well field. Appendix B provides the geologic logs for the temporary borings. Geological logs for the production and test wells (made available to DuPont by the Little Hocking `Water Association) are provided in Appendix C. The cross-section location map is provided in Figure 10. Cross-sections A-A" and B-B' generally run north to south and C- C runs west to east. Cross-sections A-A', B-B', and C-C'arepresented in Figures 11, 12, and 13, respectively. These cross-sections show that the stratigraphyofthe Little Hocking well field is comprisedof three lithological units (from ground surface downward): Q cHloalyoocrenseanodvyerclbaaynkordespaonsditasnd(acplparyo)ximately 25-40 feet ofa low permeable silty Q Pleistocene glacial outwash deposits (approximately 20-35 feet of sand and gravel `which is the site aquifer) Q Dunkard Group bedrock (shale) `The composition of the Holocene overbank deposits is variable. In the westem partof the `well field, silty clay andclayare observed, while in the eastem portion sand and clay and/orsandyclay is found. The contact between the upper silty clay and the underlying sand and gravel is an erosional surface, characterized in some locations by channels cut into the sand and gravel (Figure 13). The compositionof the sand and gravel unit is also variable, consisting of sand, sand and gravel, silty sand, andclayey sand. Where encountered in the temporary borings, the underlying bedrock is a micaceous, greenish gray siltstone. The logs for the production and temporary wells indicate that bedrock consists ofred and blue shale, red clay and sandstone. 6.2 Hydrogeology Cross-sections A-A', B-B' and C-C" also show the groundwater elevation for August 21, 2002 based on data measured at the production and test wells. At the time water levels were measured, Well #1, Well #2 and Well #3 were being pumped and Well #5 was not being used. The cone of depression around these three wells can be seen most obviously on cross-section C-C* (Figure 13), but can also be observed on B-B' (Figure 12). The groundwater contour map, which also shows the drawdown from the pumping wells, is. provided in Figure 8. The hydraulic conductivityof thealluvial aquifer in the area typically ranges from 100 to 300 ft./day. Becauseofthe high hydraulic conductivity, it is likely that the cone ofdepression shifts its position rapidly with the cycling on and off of the four production wells. Ohio River stage, 582.24 ft mean sea level, is higher than in Wingoon 0S8emen wm 000316 `Sampiog Investigation Resuts Site Conceptual Model atqhueifteesrt.prProedcuicptiitoantiaonndaltessotiwseallms.inoThrerreecfhoarreg,ewsaotuerrcferfoomr tthhee LriitvtelrefHloocwksiinngtowtehlelsfiiteeld. 6.3 C-8 Transport Mechanisms and Migration Pathways Based on our current knowledge, the following paragraphs describe the transport mechanisms and migration pathways for C-8 from the Washington Works facility. A groundwater model was developed for the Washington Worksfacilityas partofthe RFI report for Washington Works (DuPont, 1999). The Consent Order required refinementof the groundwater model for the facility to re-evaluate the extent of `groundwater captured by the pumping wells at the site and to confirm that off-site `migrationof C-8 impacted groundwater is not occurring. To meet these requirements, refinementof the groundwater modeling work was completed with input, guidance, and critical review from the United States Geological Survey, the USACOE, the West Virginia DepartmentofHealth and Human Resources, and GIST members during the model development, calibration, and finalization process. The reportoffinal findings for tthhee GreIvSisTedingJraonuunadrwyat2e0r03mo(dDeulPofnotr,t2h0e03fa)c.iliTtyheanrdevtihseesdugrrroouunnddwiangtearremaowdeals ssuupbpmoirtttsed to oDcucPuornrti'nsg aprnedvithoautsncoonpcoltuenstiioanlsgtrhaotunndowoaftfe-rsimtiegmriagtriaotniopnaotfhgwraoyuenxdiwstastbeerneisatkhnothwenOthoiboe River to the Little Hocking well field. HWoawsehvienrg,toDnuWPoornktshafadcirleiltey.aseCd-,8ainsdecmointttienduteostthoeraeltemaossep,hCe-r8e iinntawiroepmhiassseiso,nsafvraopmorthe apthatshee,faancdilaipttaoyrtriecduluacteeCp-haseem.isIsnioMnasy. 2T0h0e2r,eahdadsitbieoenanlacpopnrtrooxliemqautieplamyen6t5 wpearsceinntstalled decrease in total C-$ air emissions since the installationof this equipment compared to rleevdeulcstimoenassiunreCd-8foermi1s9s9i9o,nwshfernomC-t8heefmaicsilsiitoynarleevaenltsiwciepraeteadt dtuhreiirnghigthheestn.extCofnetwiyneuaerds as abatement efficiency improvement projects are completed. a`TchreosLsittthlee OHohcikoiRnigvewrelilntioeOlhdiios.loWciatnedd ddiirreeccttliyonnodratthaosfhtohwetWhaatshtihnegLtiottnleWHoorckksinfagciwleiltly bfiyelDduiPsodnotwninwdiicnadteosftthhaet sfaocimlietyCa-n8dintheemipsrseidoonmsinfarnotm wthiendWafslhoiw.ngAtiorneWmoirsskisonfsacimloidtyeling `migrate over the Little Hocking well field. wSionmde, iCs-d8epinostihteevdaopnorthaendsuprafratciecusloailteatphtahseesLi,ttelmeiHttoecdkifnrgomwetlhle ffaieclidl.ityThanedctornacnesnptorratteidonbsy of C-8 measured in surface soils (i.c. 0-1 foot depth) sampled during this investigation were 110 ug/kgand 170 ug/kg (Figure 11). C-8 is then leached by the precipitation from surface soils to surface-water bodies and/or infiltration into surface soils. pDriescsiopiltvaetdioCn.-8TchoentCi-nu8ecsomnicgernattriantigodnoiwnntwhaersdoilisn btehelouwnstahteursautrefdaczeo,nien twhiethuntshaetiunrfaitletdrating zone, ranged from 3.4 to 13 ug/kg, almost an order of magnitude lower than the. concentrationsofC- measured at the surface (sce LHWAN-1 and LHWASW-1 in Gren or 7.03 ~ a 000317 `Sampling vestatin Resuts Site Conceptual Model Fdiogwunrwea1r1)d. miTghreatlioownopferprmeecaibpiiltiattyioonf.thIenuapdpdeitrisoinl,tythcelaryatleikaenldy dsilroewcstitohneorfamteigorfation of oprveecribpiatnaktidoenpolsiitkse.ly cFhoarnegxeasmwpilteh,tphreecdiipfiftearteinotnlmitihgohltogmiiegsreantceosulnotwerleyddionwtnhweaHrodlothcreonuegh tdihfefseirletnyccelsamy aanydatlhsoenbemirgersaptoensliabtelrealfloyr itnhea hsiagnhdlylevnasriaatbalemCu-c8h cfoanscteerntrrataet.ionSsoimle-tayspuered wniotnhdientetchteabglreoutnodLwHatWeArSi-n 2silhtayvcilnagy Cun-it a(tc7o8mpuagr/eL)L.HIWnAaSdd-i1tiowni,tthhCe-r8atceoonfcepnrterciaptiitoantioofn dainsdsotlhveeldevCe-l8o.ftHhoewewvaetre,r tbaebclaeulsiekeCl-y8haisvehisgohlmyescoolnutbrloel(oFvleurorthoeporlaytemoefrsmiMgarnautfiaocntuorfers `Group, 2001), it does not tend to precipitate in solution and migrates with groundwater. or sorb to particles in the soil but it remains `cTohnececnotnrcaetnitornaotfionCs-o8fjuCs-t8beinlogwroauntdhwealtietrhoaltotghiec ctoonpotafctthbeetwawteeernttahbelesialrtyechliagyhearndthtahnethe dseacnrdeaasnedsgwriatvheld(eFpitghuirnet1h1)e.waTtheersteabdlaetawiitnhdiincattheetshialttythcleayo.verAalltletmhaetciovnlcye,nttrhaetsieodnoatfa Cal-s8o `may reflect the increased permeability in the sand and gravel compared to the silty clay. `cTohneceCn-t8ractoinocneonftrCa-ti8oinnmgeraosuunrdewdatienra asnidngsloeilbodreicnrgeaastevsawriiotuhsddeepptthhwsisthhionwtthheataqtuhiefer (thFeigCu-r8e c1)oncaesnttrhaetdiiosnsaotlvtehde bCa-s8eomifgrtahetessawnidtahnind tghreavsealndaqauinfdergr(aiv.e.lpaoqsuiitfiero.nofHtohweevweerl,l dsicrreecetniso)nitsoswoamredwshtahte pvaurmipaiblnegawnedllsd.oesTanobtl2seeesmhotwossthhoawt aC-t8recnodncweintthragtrioounnsdawraeter flow cboentswiesetenntthweiptrhoidnuactsiionnglweelplrso.duWcetiloln#w3elclonbsuitsttehnattltyhheacsotnhceenltorwaetsitonCs-a8recodnicfefnetrernattion (flreosmsst.h6a9n tlou8g./5L9) uwgh/eLr)e.asBeWcealulse#5thceonfsoiusrtepnrtoldyuhcatsiotnhewehlilgsheasrt Cc-yc8lceodnocennatrnadtoifofna(nrdantghieng Cfi8nischoendcewnattreartiisovnasrimaebales.ureTdabilneth2esehlolwss atrheencootnctehnetrsaatmieo,nothfeCC--88icnonfcineinsthreadtiwoanteinr thhaes rangedfrom 1.6910 4.29ug/L. Btrriaenfslpyorstuemdmvairaiazierde,miDsusPioonnts cbuyrrweinntdlyabnedliiesvdeespothsaitteCd-8onfrthoemLtihtetlDeuHPoocnktinfgacwileiltly ifsield asquuriffaecr.e soDiilss.soPlrveecdipCi-t8attihoennlemaicghreastetshewiCt-h8gdroowunndwwaartderthwriotuhgihn tthhee uanqusiafteurr.atGerdzoounnedwtaotethre cweolnltsa.inWiangtelrowfrloemvetlhsoeffoCu-r8prisodtuhcetniponumwpelelds fisrommixtehde aaqnudifwearttehrrcooungthaitnhienpgreovduecntlioonwer ldeivsetlrsiobuftiCo-n8sy(sttheemf.inCis-hedcownacteenrt)ratthieonnesnitnerfsintihsehLeidttwlaetHeorcfkrionmgLWitattleerHoAcsskoicnigatairoen significantly 2002) below the human health protective water C-8 SL of 150 ug/L (WVDEP WLirmSiinogpoonr,t OAFgr 17.03 -- -- -- 000318 2 `Sampling Investigation Resuts Conclusions and Recommendations 7.0 CONCLUSIONS AND RECOMMENDATIONS Based on the investigation at the Little Hocking Water Association well fieldandother data available, the following conclusions can be made: Q All groundwater results are below the C- Assessmentof Toxicity Team (CATT) established human health protective screening criteria for water (water C-8 SL; WVDEP 2002) of 150 ug/L. Q The C8 concentrations in groundwater decreased with depth within the aquifer. `The C-8 concentrations in groundwater at the topofthe aquifer, within the silty. clay, ranged from ND (<0.01 ug/L) to 78 ug/L, while C-8 concentrations at the. bottomofthe aquifer, within the sand and gravel, ranged from ND (<0.01 ug/L) to 8.58 ug/L (excluding results for TW-4). Q Consistently high pH values measured in TW-4 and other field observations indicate that this test wellsconstruction is likely compromised, possibly due to a failed grout sealor to a failed well casing. Higher concentrationsof C-8 measured in this well (ranging from 12.3 to 37.1 ug/L) are likely attributed to shallow `groundwater that contains higher C-8 concentrations migrating downward into the deeper monitoring zone or into the well itself, which could happenifthe grout seal or the well casing were to have failed. C-8 concentrations measured in this well are not likely to be truly representativeofthe deep aquifer. Q Drinking water is pumped from the bottomof thesand and gravelaquifer through the four production wells. The highest C- concentration measured in the four production wells was 8.58 ug/L, significantly lower than the human health protective water C- SL. The C-8 results for finished water, a combination of waters from the production wells that is distributed to Little Hocking customers, ranged from 1.69 to 4.29 ug/L, also significantly lower than the water C-8 SL. Q All soil results are below the CATT-established human health protective screening criteria for soil (soil C-8 SL)of240 mg/kg (WVDEP 2002). The highest soil C-8 concentration measured is 170 ug/kg (0.170 mg/kg). Most results for soil sampled below the water table are nondetectable. Q Overall, the very low concentrations of C-8 measured in the soils indicate that C-8 does not readily adsorb to soil, especially soils below the water table. Q C- results for soil and groundwater sampled immediately adjacent to TW-4 do not distinguish this test well as a source for higher C-8 concentrations in soil and `groundwater. Q Overall this investigation as completed, combined with the air emission modeling. and groundwater modeling results and the available physiochemical data for C-8, are sufficient to understand the migration pathwaysof C-8 from the Washington Works facility and within the Little Hocking Water Association well field. WSimoingron 207.08 3 000319 Sampling Investigation Results Conclusions and Recommendations Q Revised groundwater modeling by DuPont supports the previous conclusion that no potential groundwater migration pathway exists beneath the Ohio River to the Little Hocking Well field. system. Q Based on the current data available, DuPont believes the following pathway does exist. C-8 from the DuPont facility is transported via air emissions by wind and is deposited on the Little Hocking well field surface soils. Precipitation then leaches the C-8 downward through the unsaturated zone to the aquifer. Dissolved C-8 then migrates with groundwater within the aquifer. Groundwater `containing low levelsofC-8 is then pumped from the aquifer through the four production wells. Water from the production wells is mixed and the finished water, containing even lower levelsofC-8, then enters the Little Hocking Water Association distribution Q This investigation as completed, combined with the overall understandingof C-8 `migration pathways within the Little Hocking well field, is also sufficient to understand the distribution of C-8 in the test wells, including TW-4, in the production wells and in the finished water that enters the Little Hocking distribution system. Q In order to assess the impactofrecent C-8 air emission reductions at the `Washington Works facility, DuPont recommends continuing quarterly monitoring of C-8 in the four Little Hocking Water Association production wells and finished water for a periodoftwo years. oe LHSlreportt Apr. 17,03 000320 14 `Somping Imestigaton Resuts References 8.0 REFERENCES Burgess & Niple, Lid. 1988. Blennerhassett Island Water Supply Well Drilling and Test Pumping, unpublished report Colange`lQou,alRi.tyVD.,atCaanDneusetrtao,ARn.nuB.l,aranSdpaMcoereMhaotuesrei,alJ.anT.d M1o9n8i6t.orTihnegEfWfeelcltsSopfeciWfaitceartions, Proceedingsofthe Ninth Annual Madison Waste Conference on Municipal and Industrial Waste, Madison, WI, pp. 100-120. DuPont 2003. Revised Groundwater Flow Model, DuPont Washington Works, Washington, Diamond. WJanuary 2003. DuPont Corporate Remediation Group and URS 20024. Sampling Investigation Planfor Litle Hocking WaterAssociation Well Field, Washington County, Ohio August 2002. DuPont Corporate Remediation Group and URS Diamond. 2002b. Groundwater Investigation Quality Assurance Project Planfor Washington Works Plant, Washington Works, West Virginia Jamuary 2002. DuPont Corporate Remediation Group and URS Diamond. La2n0d0f1i.ll,PrDorjeyctR-uSnpeLcainfdifcilWla,sWtaesMhainngatgoenmeWnotrkPsroPcleandturaensdfoDresLiegtanratteLdanOdffi-lSli,tLeocal Areas November 2001. Diamond. DuPont Corporate Remediation Group and URS 1999. RCRA 1999. DuPont Facility Investigation Report, Corporate Remediation Group DuPont Washington and URS Diamond. Works, June 1999. RCRA 30, Facility Investigation Report, DuPont Washington Corporate Remediation Group and URS Diamond. Works June 30, 1999. DuPont Fluoropolymer Manufacturers Group 2001. Guide to the safe Handling of Fluoropolymer Dispersions October 2001. Inc. The Societyofthe Plastics Industry, Leggette, Brashears & Graham, Inc. 1986. Hydrogeologic Evaluationfor Additional Water Supplyfrom Blennerhassett Island, unpublished report. Kozar, M.D. and M.V. Mathes, 2001. Aguifer-Characteristics Datafor West Virginia. `SuWravteeyr,-R7e4sopu.rces Investigations Report 01-4036, United States Geological Sieger Ag 17.03 -- hi Ws 000321 `Sampling Investigation Rests References Ohio Environmental Protection Agency, 2002. Fax dated May 28, 2002, from Steve Williams (OEPA) to Andrew Hartten (DuPont) providing sampling results from Little Hocking TW-4 and Well #2 conducted on April 23, 2002. Simard, C. M. 1989 Geological Historyof the Lower Terraces and Floodplainsof the Upper Ohio River Valley, Open File Report, West Virginia Geological Survey. 160 P. Schultz, R.A. 1984. Groundwater Hydrologyof the Minor Tributary Basinsof the Ohio River, West Virginia. 'WVDEP, 2002 Final Ammonium Perfluorooctanonate (C8) Assessment ofToxicity Team (CATT) Report August 2002. West Virginia Department ofEnvironmental Protection. FimnaliLHSn!reBpEort Apr. 17,03 000322 16 ss re i i| |I | | | WW WWWW >2o ma sles Zsleelsle 555 Yale ee HE EETE EseEotE aE leEs Heine BelleE f2|2f|2|eE|Ei|En2go2se2pl2elEet|E(ieE e8zs8 2153S5e WER aElRel2sell3gEol[el3soets2nl8c2gauBlnoz8e0laye siz 2 oe 3583 E2 T T1 5f 8 Ri esbonl annnis nnns 832e2 | ! g I g RE5dediRgdidess BdaRdEs]RY Cohll Esscsslezg] : =|0 DU [-|u|2 22 22 2|2|c2]la=iSs| = 515 5|5|5(555(S555|5555/55] blololodlld odllalalldld dof 2 o/olo[o[ciooololoofjdoloiooof & ZISIS2232 2222222222 =13] BEF EE EEE ' 3 Z ~ : f g 000323 C-81n ProduTctaibolnea2nd Test Wells Lite`WHaoschkiinnggonWaCtouenrtAys,sOohciiaotion [ _uesoll wes rao rel podciawel 19 ewe] uml promwal] 7se _weuesLsoeosrrl| 7 s2zm2usen2ael02) 22230270 PpPrrrooogsvcdcsuscoconwtiWeoeerisn]l] 7.z8s09] [POT TT Taio NE ai Producten WetE]E6:7 eal Sa a mew of [ ipso "user 272503 razor] srl Producson weil 672 promesonel] 708] weuessollc wom] wwe] aml aka] aw] sews] 77 Ces Tuesosl amu ozawa ao) aol rssenwal aca] 761] | om oe FeSO] osoT ] e zac Ed34] Producion ePlo]me 7.479 "iosog ~ Procuctonwl Fer= 3 == Tuoseossl aemovn] Coorsdu] perroomwcieennvvieall 7372)4 _euwessossl aoeamcell omos]] mpreosscsoinwwear|] 7619 wiesos| zee ore Prosctonviet] 754 l APSR] B| oesa|T TT ProdietoWnen] FE 78) 3g | uso] wipsog wend 22009 oss] ors pica] | Prosuctenvei] 7. --Uewseososs]l rwaezwee]l 6r2e2e] pprroocuscotonnwweell] 7.TO] Towewseossols Toemwea] osewl l rosetoonvaie]l] 773299 ~wuiwessooss]| ezesd 651 Prpordoudcuctiioonnwweairl] 747.452 | |PE N_TupsoRBsS]l otweiwez]|EEee0se9] BT TPprroidudcutoctweolnWIen| 07.d2 [lre eso m220m 09 e 210 cupicat el] |G SOWAe | e wai 0 61a I Tes) t | e | n eSB ee a oR) HL Tom loe | ETeea setwali 7a 7i.0d3 JERSE Taig] Te Teste] ro 000324 anmios Page 1of2 Li samples G-8 in ProducTtiaobnla2end Test Wels LittWaHsohcikninggonWaCtoeunrtAys,soOhciioa.tion uesowl van] 2 RT | wLpessDoTrWAw| azsaml] maas]l "TTeesstwteul] |o |eS] late aast uiesorw [ee] ues 2000 wave Tes Tester] 10: resi 0 I wel _twesorwel___vzzozl gel -- Testwell 703) CueRbtSwGel)E TT aeaa]vaIAlS]tal Ioeavten] Ta m) E Ts|_uee sowel veal ool Tetwal 73g|) I aB-- E -- -- __T Res EtT w7l4 |CRSA Ta wi 07 ||"wLsrooseorepoono|| wwreessooeeppoonoir]] ------veaszsoezd] sToeod] Frrnisetesaviwnoei 1 | wieessooecpeooooi||" Lushppssooereoroorr||--ioransaongd aTozo] ] FeFinssnoatwaai uipsoepon| Lipsperoor |uitoncris| orcas] 27209) vawoal 20 Finowate tes]Boosiestonsome] | [ae[me_rrcsclsoarsnerrooels--tvav2aow0olaol]__sv1.e6i4]]sBBooooss stteerSSoautteonns ssoommppitiee]] al|| SinhAaudgeudstce2l0l0s2i.ndicate groundwater sampled fo the Lie Hocking Sampling Investigation anos Page2of2 000325 LHsamples: Groundwater Elevaion Data for PTraobdulc3etion and Test Wells August 2002 LitWtaHsohciknignigoWnaCtoeurnAtys,soOchiiaoton "Wweeiis#z1 | "oeti3aart7 wWietlst os1i3.s18 Twwo | [sesemrse wTwsa | | ssesers WTWs || seeorzs wTM-e10 | ~sos5eEsss wait ere Tw2 | e222 2Somm || 5s9o05s9 | |"s3e8e2s || ssrmasss | [1r8a6e3 || sseorros 2T2i768|| s"eseasr | 31098033 || ssriareers 2i174747 || 757870060 | as | siz | 235 | s7e2r OvioRver | swa7 | a6| sma | 6"1El0e.v0at2isonrsefweerreencseuarsvseuymepdtbiyonBofobrGPriWf-fi1n woeflLl HhoWuAseonop81o2f3f1l0o2russionbg 000326 artrios Page of 1 LH samples i5 1.0os ill 3 uBs cos a seed | g: s2 33s png TEE, te 3 ii 13 "| 8E8S8E% 8ES" f eSsEseeE 5 32 - F3e5e8s8 T sztzd :8 S35:38 38)| 5338 | sullyiyislyinid g2s3 2E g* S538 5255s 2 2 | ! i aRceeesssesaasc8aIsssgessg|@ac@esenaaal oot izia2 223t 232 8dale eesadddl Eiriiisiiiihiicsss |: 5555353555555 555TET TT LL 1ce2g2g2e2g3e2cc3e2c3o3o2o8c8ie2c8o2c2c3c0e FES222222222222F22222F| ig 3% 5:8 2 8H2 a zs ig 3o2E 302g iPnig s oodus 000327 |C | || : ||| | I FNS vr Ral 0 PR C&S Izbr SA LbEiE vs_o NE= EAT a ENR aSaiTl (N8 8E L Nope s es | i 5 aged i CRE EY [RES elJi Nm aT PENG Bh Re Fail E BcleE l.REd oI m BNlS Ap NIe EEd hR NTe Y i AN ow AOR al aaa aNug Ui on ORT SaLpis2 [8a EEN gl| WE aMgAA) NPR 2 >. Ry B R ei V E aaE aG 2ps N 25 VINiETEWYEASLiE)ShR HooTlL Gd Vo oad hE Coy ems Ce : L WiOgTOR8 hai de PARTE NE ld Te peLpeG aC-o Teeh lh o{ J l iZ G nil E - fol: Ng We & Sst Naas Sn Tee \HR 1] 2HE7I 2 ikit 85 --_---- = or siz -- ---- | WELL #1 * ns * Save gs .v3 by WELL #2 IFa * WELL #3 | ve * _-- -- nos * + - EASEMENT: | ---- op OF BAK-- ---- -- ovo -- - RIVER -- WATER SUPPLY WELL * TEST we ScALE 200 e S d200y 000329 oEp no nme SEAPicS a, DutdngTA 27 PRODUCTION AND TEST Ui Hocking, One [[ar-omm[ om P oT= T T | crs ET] --- LA ws 0364 2 $e gs "a ase LL --] W1E.7L2L #1 n *50 === fweow g2 VEoLreLs 5 poou I | CRE X | Po --a op OF BR--I -- - | EASEMENT Tours -- L- -- -- oH\o RIVER " 0.758] i. 3 LEGEND:sn ve 000330 17 TcEoSsT rWEeLsLus wu | scaLe CorporpateuRermedriatsion Group | Lite HCorcekeinsg oWooteor Association 205 = do rms [ET| eT EE g pe J ATC LC ( ELeie~ R =" Sh J 7 i Sd, [IHTTT; ji a i ik nu iil |e La, oe i If ley "me ah uy LNEa E i yl i 8:i \NNl EE NN er NEE 1d EE fic TN Ef i li 5i iL [BeooErii i0 : C ShL. |SIfiE NT N 20 ih . it s g 3 <8 EEN | BE : | CEE : No i ifd N NNa EoE |; < NEEES NEN { 4 iiSPlEidLi = = I - * vs ns * Aue ps va WELL #2 on A* | L-A1 mney wel #3 | ons LHWAW-2. or x mez UASW-1 x ver x * re uns-1 _ | a EASEMENT- s-2 ne * ---- -- -- R Lop OF SAY -- RIVE -- ovo v -- inden m LWEAGTEENRD:SUPPLY WELL TEST wGel--l Sou & x BSOuRPILNEGS~ GROUNDWATER SCALE (gp NOTE: ALROCEATAIPOPNRSOXIOMFATWEE.LLS AND BORINGS 000333 Corporate Remediation Group | Lite Hocking Water Association rr Little Hocking, Ohio 200 0 200 SgSee [oe|= = ==, |e ------ Lo " Tn 4 172-00) Je, = onsen RVC (8:20) WELL 5 vs t*en want SwANE- | Auo (0.662-5.58); le uww-z wang 9 Xuanve-2 we $n at&m x NT A o12-1.32) (0418) awose-uzg2n --moWEnLLa#l3 s fr us LHWAXS--1 _-- -81-214 " _ (si z e"e[EASEMENT Goran op OF BAY -- -- = -- HO RIVES > FA | . "TV-iz (0738-026) | _-- Bids LEGEND: TWBEOASRTTIENRwGeS-UlPPSOLIY. WELL & x SBiObRlGE.s -- GROUNDWATER schaLE OE 200 %o0 [am NOTEAL:ROECATAIPOPNRSOXIOMFATWEE.LLS AND BORINGS ND = <001 vai 000334 = Corporate Remediation re Group | Lite HiotckeinHgocVkoitnegr. AOsnsoociation EEE [F[roaem m= T] e ToT | =-- \\ i 2 ra Oa Vs ELL #5 ee *Tv-a a omnes OLaKit va 2 2, x xX AREre > LHWAS--1 %%Pa o2 2i weg) Vf, oo 12. vei o For ra 2 I __ _- 3 srs --- = - Jop OF BANK --~ - or 0 RIVER " 000335 L% EER wo somes | scale 220 200 sz 3b*y[EASEMENT _ -- _-- LEGEND: 3 tTeaormwseuen vn A Baes AIR x SsoEms GROWER 565---- DJRE-- Row, CROUN0soa WwenEDteGEeLevons pe GHDpry frogLniios Corporate Remediation Group | Little Hocking Water Association g-eEA2 FPmS P= no l e eS ] =) -- w | es * Oywe gs vw #1 L0 * ves VELL $2 an ro CnAn LHWANE 1) === WELL #3 | Co x8 [re x xLHWANE ` nike i. A x (NO-170 ug/kg) * ani yXm - | _ sz v*eEASEMENT- + -- op OF BAN -- -- = LeWcATeENRD:SUPPLY WELL TEST WELL ASoRmOmNe Coshoipmesa j>So Psso calse ---- 0 RIVER NOTE: 000336 LOCATIONS OF WELLS AND BORNGS ARE APPROXIMATE. ND = NON DETECT AT STATED REPORTING LIMIT op ) <5 ConcemTo ~ Corporante Rmemediation ogre mia Group F|f Leite HLoictkeinRgTocWkaimtnegr, AOsmsoeciotion PE. | ==i Tarn" Too 1 A vesuw gs by | c' a1 e*r A wmaHE lwp po ew gs | une Ce 4 - --- eAsEENT | op or -- | po -- B - A} oro RWER LEGEND: oRson ve x Gent A astShpLES SCALE == 200 a e]200' norReL,OECATSIOENSRORF WEeLLLSsMAD0. BORNSS 000337 [am Corporate Remediation Group | Lite Hocking Woter Association seofnlu-BreoSutmdintg e a27 F=Tp=e THosi=ns. fSia=] nt inne BE i ie 8 To -" i| iil blA i i] o 15 ol == TARE shale bs | LLL } Beg ile oid ag Ee Lif, He e C k3m FHo iin ni gEfioga: g5m 5 -- \ ; @ !i || eeJ Ld i5. 3oy hh tl3 |MBH[H i] $8 | I1I 4 i] of 3 i i ? A y fg ee | E --_-- / ati \ J 1 Frm JH 1d oh uh bh LI eels i | og| ry 1 FO . bo ! 55>x #X ogd Lio ---- | 1 I I IH[LE | EHH dl jiAd] ;n eli : ii Ere, | : Po =if ox he: ; i Z8a \/ 3285 bh 1 ey . 2: i -- [JA | TEx | AEE 3 gg lL i 4 fg k = TAT || aRdhu fo it | PLL, : con 0 ose APPENDIX A C-8 ANALYTICAL REPORTING 000341 C-8 Analysis of Water bInyOEcxtyogbeenr R2e0s0e1a,rachn,eIwnca.n(alEyxtyigceanl;melotchaotdedfoirn aSntaaltyesCiosollfegCe-,8PAin).watTehriswalasbodreavteolroypuetdilainzedstLeisqtueidd ChLrCo/mMaSt/oMgrSafpohryC-T8anadnaelmysiMsasinswSapteecrtirnomNeotvreym(bLeCr/M2S0/0M1Sa)n.d EDxuyPgoenntcaodnotpitneudesthteo rpeegrufloarrmustheeof water analyses for DuPont. eEvxaylgueanterdepfoorrtpsreCc-i8siroensublytscfoomrptahreilnagbotrhaetfoireyldrespalimcpalteeorfeseualcthtoftiheeldcsoarmrpelsep.onTdhiengselarbeosurlattsorayre replicate result. Q Ifofrbotthahtraensaullytstearisccloensssitdhearnetdhteophraacvteicpaalsqsueadnttihteatprieocnilsiimointc(rPitQeLr)ia,.the replicate sample: Q c[ofnosniedeorrebdottohhraesvueltmseatrcthbeeptrweeceinsioonnecraintedrifaiivfetthiemetswtoherePsuQlLt,sditfhfeerrebpyliclaetses itshan the PQL. QIfa voanleuerelseuslsttihalnestshethPanQLthethPeQrLeplaincdatteheisostahiedrtios hnoatv,eamnedtitfhteheactcweoptraesnucletscrdiitfefreiraed by Q tIhfebocrtihterreisaulifttshaereraetlalteiavsetpfeirvceetnitmdeisfftehreePncQeL,(RtPhDe)rebpelitcwaeteenisthceontswioderreesudlttso hisavleessmetthan omreaesquuarlemteon2t0s%.divTidheedRbPyDthiesirthaevearbasgoel.ute valueofthe difference of two `saWmhpelnethaendprleacbiosriaotnocrryitreerpilaicoauttelirneseudltasborvepeoarrteedmebty,tEhexylgabeonrarteoproyr.tIsftchreitaevreiraagfoeor fprtehceisfiioenldare: reexscueletd(efdr,omExtyhgeesnamrpelpeo/rltsabthreephliigchaeteropfaitrh)eissaabmopvlee athnedPlQabLreapnldicoanteerbeeslulotws,. tFhienarlelsyu,ltwthheatnios ne a(bCoEvDe)tahnedPaQrLeSreipsorretpeodrtaesd.FCC--1843refsourltcsoanrseisrteecnocrydewditihn the Corporate Environmental historical results Database Aannalaylsiiqsuaorteoufcsaecdh tofaieslsdesssamacpclueraicsya.lsoThaenaMlySzerdecaosvaermyatvrailxuespmiukset(fMaSl)l .beRtewseuelnts7o0fttoh1e3M0S%, unless the sample concentration is at least used to spike field samples is 500 ug/L. four times the amount spiked. The maximum amount ASltlanddaatradpOapcekraagteisnggePnreorcaetdeudrbeys E(xSyOgPe)nanardedraetvaiueswaebidliitny-,huosuisnegfotrhecochmepclkilainstceprwoivtihdtehdeilnatbhoeratory dQautaalirteypoArstseudrbayncEexPyrgoejnechtaPvleanbe(eDnuPgeonnetra2t0e0d23i)n. coRmespullitasnocfe twhiethint-hheoluasbeorreatvoireyw SiOnPdi,cawtieththaftew jeuxcdegpetdiounssabalsenfootretdheinputrhepoisnedsiovifdutahle rpreovjieecwt.suAmmsaurbiseest.ofAtlhleddaattaarpeapcorktaegdesbygeEnxeyrgateendhbayveExbyegeenn hinadveepbeenednenstu(bim.i.t,ttehdirtdo-pEanrvtiyr)oqnumaelinttyalasSstuarnadnacredsr,evIinecw.(ESRIe)suilntVsoafltlehyeFqouraglei,tyPeansnssuyrlavnacneiar,efvoirewan will be provided when available. Roped A 000342 Page 1 C-8 Analysis of Soil `The laboratory performing Laboratories, Inc., Arvada, aCnoalloyrsiasdoof(sSoTiLl-sDaemnpvleers).and associated field blanks is Severn-Trent (SSTOLP-)D,eDnEveNr-LaCna-l0y0z1es2As.ampElaecshfsoarmCp-leaicsctoersdtiednguntospaikleadb,oriantodruyplsitcaantdear(ldaobpreerpalticiantge)p,roacneddsuprieked with C-8, using LC/MS/MS. eSvTaLl-uDateendveforrrperpeocritssioCn-8byrecsoulmtpsafroirntghtehleasbaormaptloeryrerseuplltictaotetohefccaorcrhesspaomnpdlien.g Tlhabeosreatroersyulrtesplairceate result. Q fIofrbotthahtraensaulltystearies cloesnssitdhearnetdhetophraacvteicpaalsqsueadnttihteatpiroencilsiimoint c(rPitQeLr)ia,.the replicate sample Q cfoonnsiedeorrebdottoh hreasvueltmseatrethbeeptrweeceinsioonnecraintderifaiivfe tthiemetswtoherePsuQlLts,dtihfeferrepblyiclaetsesitshan the PQL. Q aIfvoanleuerelseuslsttihsalnestshethPaQnLt,hetPheQrLepalnicdatteheisostahiedrtios hnoatv,eamneditftthheeactcweoptraesnucletscrdiitfefriear.ed by Q tIhfebocrtihterreisauilfttshaereraetlalteiavsetpfeirvceetnitmdeisfftehreePncQeL,(RtPhDe)rebpelticwaeteenisthceontswioderreesudlttso ihsavleessmetthan moreaesquuarlemteon2t0s%d.ivTihdeedRbPyDtheisirthaevearbasgoel.ute valueofthe differenceoftwo s`aWmhpelnethaendprleacbisrieopnliccraitteerrieasuolutst.linIefdcraitbeorviea afrore pmreetc,isSiToLn-aDreenevxecreerdeepdo,rtSsTtLh-eDaevnevraegreorefptorhtes the rheipglhiecraotfe ptahier)siasmapbloevaendthelaPbQreLplaincadteonreesubletsl.ow,Fitnhaellrye,suwlhtetnhatonisearbesouvlet t(hferoPmQtLheisarmeppolret/elda.b C-8 results are currently reported as FC-143 froerccoorndseidstinenDcuyPwointth'shiCstoorrpiocralatreesEunltvsironmental Database (CED) and are aAnnalaylsiiqsuaorteofuseeacdhtofaiselsdesssaamcpclueraicsya.lsoThaenaMlySzerdecaosvaermyatvrailxuespsihkoeul(dMSf)al.l bReetswueltesno7f0thteo M13S0%, unless the sample concentration is significantly higher than the amount spiked. AllalbodraattaorpyacSktaangdeasrgdeOnpeerraatteidnbgyPSrTocLe-dDuernevse(rSaOrPe)raenvdiedwaetda iunsa-bhioluistye.foRrecsuolmtpsloifatnhcee wiint-hhotuhsee lraebvoireawtoirnydiScOaPt.e thAaltlddaattaarreeppoorrtteeddbbyySSTTLL--DDeennvveerrhhaavveebbeeeenngjeundegreadteudsianblceomfoprlithaencpeurwpiotshesthoef Ethneviprroojnemcte.ntaAlsSutbasnedtaorfdtsh,eIndcat(aESpIa)ckinagVeasllgeeyneFroartgeed, bPeynSnsTyLl-vDaenniav,erfohraavneibnedeenpesnudbemnittt(ei.dc.t,o wthhierdn-paavratiyl)abqluea.lity assurance review. Resultsofthe quality assurance review will be provided FA000343 m7 APPENDIX B GEOLOGIC LOGS FOR LITTLE HOCKING WATER ASSOCIATION WELL FIELD TEMPORARY BORINGS 000344 LHWA-N1 ee nr | SDre mn] Srein | o mies m, fhe ER a ------ Fy Sr | ssromriemre PissSits16086. ii 3; oescReTON i on 9 Viz 450 SrIaLnTgYeCLrAaYy, atonpdfdeawrkinbcrhoewsnimsegtrkaeyawiDormyotatnidesc.uBm.ecbro ownm withe lotssof mn Lon SLYCLAY,wtgra motes cursaoc) ndsome ve I (I s| om mev ne cunmses sensu sams 10 wi BrownSILTYCLAY.rarefinefo very finesand,sticky.Rollsinocoarlsoges. 0 oes w(rirr esosscon5:20s15.totes. lt] ".. (7)[Femmeem----" : 9 Brown fineSAND,minorsit and clay, wet. inte witr hmoibste SILd TYCd LAYe0d 20. J | [r Fressnmm amm mEi ov x 000345 ee `DuPontCorporateRemediationGroup Dudas August20,2002 r eSe ael e |oFmioee a vmeln IL... Soy :Se, N |N p `Samp prefix LHWANE Fo sov=1000 E sr Ei DEscRRTION f > 7 rr i 0)BSWeaver CET SIT 9 7 ssosir cy so, cess i sen vl 5 gly i wi 0] i J wi JI] wo] va wwia =| a I wm | 2i WEEiE |oomstrcuymess son on ts tet crt mediumgravel10 ~10.5'depth,wellrounded. cesumrsvissmosmssimssmn [mins |[ asm s maseonom mmma omn ara sotssume E [EEEE ne GWelevationwhenGWsamplecolcted (21-27). Brown 0010madim SAND,with raofin rave if an coy, iacocus,we. femme me 000346 rr LHWA-] NE01900.2012) SoWonCCaSarpanoWcrotynRgavCmeoamnsdaaaominiooOnnnrGdoesrs" || pOOWolecegastreinenemrssisiion Gscuvoem 0l02 roc 16565TeE pris Sorta eon Sewer |Soa gtoeventasgeir a738 prepa SoavFonresnoreps orpainositoen31 Fees 01000 1 w4 or [Eh TE] [ToamatbomsiatyfsnBcoerSoaAaeNNDsewirReeSTamsON or warded A we fri dof FER [somonssore antonger pe i] sz BLL sof sr FPEErT] || bAomRocRaromsity naocous SANDwisams fn ocoarsegal EES55] | G(OroooheonotgmraaytcoodmnpaosteeSonmIeasLuredTBrSonceesT,smoifOcvaceerNayus,Edys.ds,notversus tl EBE e [[awew =- we |= E=E= = w] EEEeE 00034 ia fproermrLHaWrA-eNsEma2 y1 | tL ometer NEN Se ensmCa eosmo" || SSnuon:,l Cdomoe T I T. , [| teed onRatan. Per2s$00o05. ef :3 DESCRIPTION " 7 (meso wHiL en otsrrn esto mrt a [I] [rm tao svn ssw. moms wih 100gpartingwih rangecoat " i oun SLYCu tn yngSILTY CLAY. Sst, i~ vetail pEomTsAToRsTvByooiwoShTroangbeSc etutpt, 1s " 7 oe l] sr er mi 7 GWlevelmeasured ~12hours afterwellinstallation. A "0 oO 7 ot TOat25.7. Wellsel(34PVC). 2. 000348 -' KCoroT omn=am|mS|eho|o| -:om=:|maE"|e| | = ~. = faa=|fr 3: 2 oo ; : : -- -g -= = - : | 7bd |EhE: i val " oF==.R:=E| = . vr| E~e-yey: risen v 7r || | | o :. ) gon | ova r 7 } ne 15- 7 7 wr 7 =winaE Ey pof=s- >:=- ~ | | i} osso d 7 =evan = w= = .= : oy, B w 00349 hed EChE oraE I IWA-S1 wor FEE , E|. Ee . Som4E EmeT E eoee 5 iy Sp ee 7 [mm win [meSTV a = CLAY. bart,sf. compo lies J. wwiy nwsi wmyi wi !"te HU S [voesrorme snirco is necnms ifbutsemi-plastic. i elorsmsmse seomsrs to [mw A manatmemgrets,mos,veyplas cnr Bi 7 LEI | 7 [eeeSm A vr love mmar empnsne terbedded (5-1' YS ANDSANDY CLAYS. Sityclay 4] " (i 'REDRILL- interbeddedbrown CLAY and fineSANDS (droppedsample) i . p|A i a LHWA-s2 nt rn TFenr CI a ph hono sComeontOrn der" | D| Iitngeli,abos Tr Gombe Tie S------------------ A... on Rn | EE wns m HT mm PooSubsicts |sseov|| 8 DESCRIPTION i5| son o - 7 207298 5:Sunsfoams 123 so, uy, 0as un SICLLAY TithrYy, miseta,t ot escea te, wi SILTY CLAY. redha an ray mots. Semihasct runby,mre day and 7i (PIA Ssona srcr a rctcg, somR ite pssI ,mrmotane oI = II). |r wasn mie sts. sr a Water ovemeasured nt orig. w p I w7a T e oSrT CCpA eTotiao.T aStRTe. Ten i5 TSua ae,vor a, hn tv 7 men src mm rv i ' " Yi ml == = -------- | EEE= = mE = [wae LHWW/,Ai - =3 rey wy e|e } : : | | reEET Fr | )at ~ - | = or era | - cre ; =7 7= _ } :: - | | - - . | v0 ron surv | 7a ] | 7 -| | ]oe sori | 7 .| : po- 7 ; v7 v r -- : 7 own i | |: " I v v 7 i . - v vr i_ iii "t 7 T TT i fIii Cosas LHWAA-szWG1ag2eo02rn0o12) || NSSoemE mSawoT srer aa OopCarportRamedaionGrovp | ObeCiroes Asacz `WashUiingbtroaoncion$rg1k6sv0eeCaosnTiteaaEsrisoOnrder Cf Soonrigyrngtdnes SGcoooorgeniibsya Seamrimmsspintersiinn 1 --Jumes sew Bees 7 = i o |2 : iz DESCRIPTION i I & |2 RE & HH ie Ee] VaatIi [Smarr nyt sr wasrwdsms s bSEiE [Tamebom STV oomedi SAND i so re ri vel 6 iin] [wer G3 wf FE 5] |r on nesowmennpotmost vecores | na nmST | Ee 45- 5.50.5] | Tabn rown nfini etos medih umSILTYSANDwithlittefinetomedium gravel, wet, wasn Sor wan) sof FSEEEH || inomatduhm rai avee0.5)tommytis bown fra coars SLTYS880 = sof BpEaEu |rpoefoentooiusogimns Svsav ensom oto, | msn EE] |Velboownitogereenns ray wears iSTb. esrock dy A sss = TO A@-ST- 0. 000353 ooW- : | = Sa - | | ore ~ SEerat E|- . || |ChebEEET = S~ e of Wel == i3 =Sort. 57 So - " dan mt F . Le - - ear co I : |s|-- - ; `motties, somewhat | | .A = 7 7 7| -=" shri - | ron = : an or ] . " vv 7r - . = ): j |] _:: ) ole7 vvrr cont sav : :| | v 7 7mwnwaaSE-BN.= = 2 ,on v7 v 7 rr= - ~a = = i5 - 7=- ray = = = : 7 7 = w fi[ti ee TTT 00 LHWA-W1 EmmE eimE | r Sd|eoae e tSSeena R | ewes `DuPontCorporate Remediation Group: Dug Complusty tly AAS, Boy teen prserniow iHale oo &g 5g ------------ "DESCRIPTION 7 l] 1 r Pv E [eeGa ene 451 ss2 S01 sar o0- 000355 ee [vee LHWA. = " je 1of "IES = rt = r= = or= = a-t.) -- peon ne: Hi Rh - : 7 ; = 2 5 sit ei " coor>mototens--5. Becomes Br~ owigra- y : | =RrS=ram" s i fs ] sets ) a 0 i .wes--: ---: -~ 1) iN 71 sims= E- | i a 15miu wi n = i o"o = : _-- ~| -- " = - i i rae TC I o er E m] - | 17 Co - 7 E : i ; . -- ins ; 77 wrrd = TE =wom y-- CLAYtoCLAY wetsear 0003 LHWA-W2 Gogezara) | fone SY Ea EE || EESmEE, mEEoEm. |E| mEme OemwiosCtomaatOrngs |Orieganos m | tmee Gop ornate Pow Sp 41000 g 8 301 ser 77)i '5rownandGray SILTY CLAY, IncreasedsandcontentwihGepih, moist i |YY r p-- r-- r -- 25d oer (A 401 sr 451 52 0 sar 5 saz * Tri TaeyLHWATe-NenWG1agaetan | | Nmaemeetomnseiey a eSeinogse igmionES || ofSotiwouteoNaspos GCoornie | Seeprc conn tc [ewes San Flos505 ~ $0.09. hoin) | :8 oT = ton len to 25-1573 H i H E,EtannSi LTin some rams.53,noivcsa,ndgrdy.anGdraodeys tig. nish brown 1o8) i ied fr Srown CLAYEYSILTSILTYGLAY, micacecusa,ncgrcyamnotgese, dy. [Hi wan ffoo Hl mryn wwei se "BrownSILTYCLAYwiite fine to mediumgraveland littefinesand,becomesmoist, awn i ( / 0]'RsoS wsurS camsaR nc roR mas R ovens ome to sim sos -- wi iy) Same 2abovewihstars a 21 Tm EB aS sv `BrownfineSILTYSANDwith some clay, wet, gradestotannishbrownfineto medium' J Tri nooh mdm STYSAND. wen | | @s255) wa 00358 APPENDIX C GEOLOGIC LOGS FOR PRODUCTION AND TEST WELLS (PROVIDED BY LITTLE HOCKING) 000353 Page lof 1" Well Logand Drilling Report wen # | EERE coil: cblovre PodhoosDsw:ia@t6ve14sise-hao2st6fea5iuW-scaw6ots7hset4nesr0r Water Home:hp 1 z WELLLOG AND DRILLINGREPORT. y Ii iam 959 RoIGaINOAwaLcO r NameW :LAITNN LDELHOOE CCKAITNR GIOWNATERLoamtnNsbeipr:oDELPRE Section Number: uty: WASHINGTON adress: Staactaet:iOoFn Map Year: 1981LZoicpatCioodne:Ares: ationNamber: 2 orOchNoSlTeDRlUaCmeTeIrO:N DETAILS Cas"ienngUsDei:ameters 10in. aquiferType: ToCtuailngDTephtihd:aeSsOs.; ScreenLengtht DDaCtueelooftogpCLoBemetpdnlrgeothtchik:osnS:LA 11/2870 DrillersName:G.M. BAK&ESORN `StVaEtiLcLWaTtEerSLTeveDlE:T1A0fI.LS eTessttRDatuers a5t0gi4oo0mnr:s. Assosiated Reports NONE. dow: 25. : WELLLOG SFAorNmDat&iConLsA.Y SGRAANVDEL&ICSLAANYDICLAY SAeNDe&GRAVEL Fr0om-T2o n -% % -40 0% | 1 1 000360 x a `tp:/fwww.dor state.oh.usiwater/maptechs/wellogs/app/uvel|l log._reporta.splonty=WASHINGTON&WIR.. 1/17/2002 Fraer `Well Log and Drilling Report Page 10f1 1 xT OhiWoaDteeprsWretlmleLnotgofnNdatDurrailnRgesRoeuprocrets i wer PhonDe:i6v14i-2os6f5iW-a6ol7e4n0 i WistrHomec:nsbiil:tl:avweebrodawrsn@s oshawchoebt.uesr A WELLLOGAND DRILLINGREPORT ett unr: 555 S------ `OOrRiIgiGnaIlONwAnLerONWaNmeE:RLIATNTLDEHLOOCCKIANTGIWOANTERLotNumber: County: PASHINGTON Township: BELPRE Address: Section Number: a pg pee Location Number:42 LocaMtapiYeoarn: 1981LocationAres: AlCBeOorNehSomlTeRDmUiaCmTeatIerO:sN DETAILS grWelleUse: CTootanlgDeTptah:c0s. CDutetLopiBendtgrloechk1:2. Dr`iSclrlere'nsLeNnagmteh::GA,BAKEDRat&eoSfOCNompletion: 11/2970 I" wows mastoErans StaticWaterLevel: 16. down: 201. TestRate: d00gm AssociatedReports Test Duration:24rs. NONE A WELL LOG RFoormas tiones Pn 1 SAND& GRAVEL From To 07 nn ne C 000361 tp:/forww.da state. oh.us/water/maptechs/wellogs/app/uwell_log_reportasp?cnty=WASHINGTON&wine... 1/17/20( ol `WellLogandDrillingReport Page 1 of1 ol wee #3 OlWeaDceepWaerlmeLnotgofDNenitdrvaDisionnReofsRWoeparottrest ol Wate Hcomen:bpclev brPdhoaowrnsen:itee6s14os-h2sa65cs-6h7s4s0 atoomer E-- ol WELL LOGAND DRILLING REPORT wlloOCroiRugInitnGysI:NOWAwAnLSeHOrINNWaGmNTeEO:NRLAITNTLDE HLOOCCKIANTGIWOANTERLTootwnNsuhmibpesrB:ELPRE Section Number: Wacudri: corn 721 gl " TStatoe:cOHuMadpYoeanr: 981L2ocpatCiodoenA:res: WlCB`oaCreOhgNolSDeaTDmRieaUtmCeetrTesIr1:O21N0.DETAILS fprWen Une: CuTtotolgDeTpitscSa74. CDuteagtLpooBnegtdrohck4:5. DScrrieeernsLeNnagmtehs: LATNE-OHDIeOa,fCCOoLmpSletion: 42976 WELdLowTsE:S8T1. DaETAILS TTeoesDturRaatiton:s0234gs. ANssOoNcEiatedReports - ofFBWoRrENmLaLCtLiLAoOnYsG oll savory cua SANDY GRAVEL of RED SHALE Fr0om 1To -- Pa % -57 4 000362 2 Jfwodnrstwat.e. ob.us/water/maptechs/wellogs/app/well_log_report.asp?win=450860&cnty=WASHIL.. 1/17/2002 mo n Ly WELL INFORM-DARITFTIWEOLNLS :; = The layne Ohio Company m e ee v e eWe ATER SURErLYeBEA VESemersam Aere st 40_335800, StOeOeHsiioneWRRRE Somer: oI n onto ito: pt, 5 ores . ebb p. cotburn nis ocr tia rat ae son remo _ cor J ay [Pr I am on 43 24" Tan gtriats TR Mr I. Wore tn +375 steel with _weldedigins from :| 43 12" +375 `Screen Record: soType -- _Cook ; 15* 2315 , more---- TLE are aan wnton__0 I SN Aron se steel trwith sate _weldedigins from S.5. wiwith welded jboiinnattfiroomn 5 set " soe rom wto ww0_15 000363 / Feat Feet WeLL Log Oecription 0 to 20 Brown clay 20 to 27 Brown sandy clay 27 to 37 Brown clay with coarse to fine sand 37 to 45 Medium to coarse sand and gravel with'sapdf: ne sand I 45 o__5] Medium to coarse sand and gravel | - weno rrr %ceseee--------eees eee. | rr cee m-- eer------------ ernie #commssere------------------------e ----s ----e e | | eesBee m C mst---------------- A ---------------- I eesBeets smte-- m ---------------------------- I -e__.__ -_-- Well TestOnto: StaticLevel 18"8" pumping kovel 31'% ster 24 pourspumping ot _402 apn Length test Ves. See Wel est Dats Sheet ted REMARKS: r--e-- re-------------------------- ---- e--e--s---------------------------- r sreerte ------------eeereeiemrmmt-- yy -- rer----------ete r--r------------ ww| -- re r------------------------------------ mm fm 000364 0 oGye r4 y WELL INFORMATION = DRIFT WELLS The layne Ohio Company 00 Tr VEL IEWFAToERSoUPPmOLYAen WSAERTVEIRCESTme eEmReTsCe OUNT Name ofJob Little Hocking Date _8/31/84 Hg l e ity oro Village e Litte leoHmoeckingbmi m wi_etwe_swarte __sOnhio me Moem m Cem nTOtherwise locatesds 356%southofPW$3 qHs _0 Ci0 oa 00000ta000000 Work Began: _8/30/84: WorkCompleied: __8/30/84 Well Depthto Plug: _ 55" 1 sor an seh. 40 __ BC sunecren jemeren " |B 1 with Jos trom wn pinatm w . n Conor, Tpe__102S0 lob iH 10 AmosuntarOn. oOwpening MatYeCr_ial win SEY pinto rn " . a Tyeit1Boam__VC A etm " om " Cotta nee Amount 11004 we Size #4 `Source. Parry Gravel SE From To 58" 30" 000365 . i ar - WELL 10G oman | 0 to S Brown clay "" 5 10 to w_ 10 15 Brown brown sandy sandy clay clay, traces of aray clay 15 w__32 brown sandy clav, lovers of sand +] 3523 wto_ 5537 mSeadndshanadle,grabvleule shale w- w |wo Tego Snot t 12.2 T persis, Well Test Data: Static Level 7";pumping level. afer 1 REMARKS: hours J pumpir wpsn a | o------------------------------------------------------ 1 J- n es 000366 Tn Tn Li Gy BL -B- [ [Bl [| - The lwaeynreonOshoin o- omCeroWEmLLpS any Lo WATERLaSUpcPPiLcYoouSr, EweRVICES WATER WELLS * LAYNE PUMPS * TEST DRILLING o WATER TREATMENT EQUIPMENT 4921VulcanAvenue + ColumOhbiou43s22,8 - (614) 876-1195 IRI Nameof Job _-_Little Hockina | Cityor Vilasge__ Little Hocking Owe _8/31/84 swe__Ohio OI CL weno: Tw-z omen Daves eeSR elewion WCwimetme ene . [BIg IMI Section _, Twp. NRange Com Onerietoed Sogotoso outhofPW3 eee eee--------------------------------------------c vCourinsg ecqo:rT!O8S /30/84 A Tom"WsoirkiComprT loeutneddR:FE__m8e/E w30/8w4 e,Well DepthtoPlog: __55" 1a EE gL so 3 sch. 40 _BVC wn screw jmstem _ wit font tom w i with jos fom - Screen Record: Type ___ Slot .010 . - I Amount Dia. `Opening Material 0 5 _3 .010 PVC with SCXew_joints from to - with jos fom w |) TyofpSeaelst Bottom _PVC ole Recor: I inchfrom to a och om x. Gov Pack Raed: fa C Amount Size 13008 a | Ji] Source Parry Gravel From To sg" 30 000367 I ee : Fee Feet I 9 w__S Brown clay Description | 5 w__30 Brown sandy clay, layers of sand i 30 w__55 Sand and gravel | 55 w__ 58 Red shale and blue shale all ewe o Uhl mess -- wy oe OOOOO O II --r--r ------------------------ i0 a l oe : oe i TE ee 0 Ee -------------- |, - e_ We-lel T-esetOsta: StaticLevel 18.3" pumpinglevel after ____ hours pumpingat______ 9p i Length of test tos. Ses Well Test Dota Sheet Dated, REMARKS: it1] --h-- h ------------ -- " ------ - [i n 1 ee ee [0 I ---------- -------------------- e-- e ---- Se-- r r-- ere ---- 1- - I 000368 i [ WELL INFORMATION = DRIET WELLS [ I} .Bs The layne Ohbwiioont Company avr coum, we l|l W WATERAWELLT S + LAE YNE PR UMPS + TSEUSTPPDRLIYLLSINEGR+VWIACTEERSTm REATWENT e EQUIPMENT 1571 Vion Avie ColuOmo n07,8 + (614761195 | Nemeof ob_ Little Hocking [ Gityor Vitiage__ Little Hocking I Wella: _TW-3 rile: __D: Havens Date. 8/31/84 se Ohi0 Aig_SR |1 rw fl) oti aJne | Otherwise locateads __300"_west of existing wells. Along edge of right-away i so at sch 40 _ PVC yu SEY pimiom . Ii| WCoariknBgeRgeacno:n:i a8/m28/s84 iTr ~ WeoxrisktiCnogmrpoluentded:_eT_at8t/i2me8w/e8l4was GrWiell.lDep tot Pluhg: _-- _ 55" Mao oe wri with joints from to I | with Seren Record: Type _S1ot $.010 | Amour Oia Opening Vateral sav 1010 BVC with -- with h Type of Seat at Borom_ PVC. Hole Record: [i -- inhfrom. w | tem J Go Pack Reed: lg Cr sas Source 11008 Com Parry Gravel ] . joints from Joints from joints from . From 58 to To 30 I | weL 106 4 Feet Feet Description - I 0 to 5 Brown clay + 5 t_ 30 Brown sand clay, traces of gray clay 10' = 15t | __30 w_ 55 sandandgravel ( __55 - w__58 e Blueshale y ----m---------------------- ee oe ----- wo___.. W --r-- eo ---- yo -- ee oe ee ------------------ ere Rel..f mmm HAE res _ I l Well Test Data: StaticLevel 3-0-1" _;pumping level after | | Lengthoftest hes.See Well TestData Sheet Dated, hours pumpingat _ gpm. REMARKS: I I - . Ny -- -- rr ------------ EE NW -- _- ---- r, r-- , --_-- _ I 000370 y ma "GD WELLINFORMATION =DRIFT WELLS Ys The layne Ohio Company Lc q WmenAWELLT S + UE AE FR ULNaPScw aTSErUSTiPPmDRLsIYLoLIuNSrGE.,RVWwAIeTCEERSTmREATeHENTeEQUIPMENT tv A+ ClOoNo4n730 (61018761195 N Naomf Jeob__ Little Hocking Gityor vite_Little Hocking N WellNo: Tw-4 Dies: __D. Havens wi Locator wd oq `Section. Tw. (____). Range J) Lm Otherwiselocated 3s _300"_west of existing wells along HN WorkBegan: Cuing Ror _8e /29/84 r ; dE romWiotriknCgomrploetued:Fe _t8n/e29w/e84l__we 5 Amount Dia WoorTHcos Mah 54 _3% sch. 0 _BVC _ wihgcrew n vor i Svenfens: Type_Slot $010 PVC with BH ion on Opening Me 5 3" .010 PVC \nSCEEY LI wr Type of Sut at Bottom _BVC Vol Recor tem Horns ten Date _8/31/84 ute Ohio Rig:___SR ote Jr-- County. edge of right-awa -- rlW,ell Depthto Plug: __ 54" sjtnsotonm .. ois tom - ten join fiom . _ [8 Amount Size. 1 008 __sa T PL Source Parry Gravel From To s800037 30 { . WELL L0G : Feet Fear Ouiripion w__ 5 Brown Clay : 5 w__ 10 Brown sandy clay . 10 w__ 15 Brown sandy clay, traces of aray clay , 15 __ 30 Brown sandy clay, trace of sand . L 30 w__ 54 Sand and gravel L --554 4w_____5588 m0 lBuleueshshaallee 000 _-- | -- OO EE . _-- | _-- _-- | _-- _-- | 000 WellTesOna: Stati Lovl_1@a.10"_; purpio eve, ater hourspumping at. | torsnotsen Pe Se WelTos Duta She De, som REMARKS: -_-- _-- _-- _-- -_-- _------ EE -- ~ -- ) 600372 u 4 WELL INFORMATIO-N DFT WELLS ! ie The layne Ohio Company AWATER SUPPLY SEB RVICESo me Jd WATER WELLS LAYNE PUMPS TEST DRILLING * WATER TREATMENT EQUIPMENT | temeotne Little Hooking Sever & Water owe 11/2/84 City or Villsge__ Little Hocking J sWiener:ie TW-5 odie ___D. Havens rea de rem Swte __Ohio Rig:_Rotary ote ant cnn 1 Otherwise located as. 300' west of T.H. #3 Cir rasaSTiresmo on SATAN = 1 Work Began: __ 10/30/84 er WorkCompleted: __ 10/30/84 `Well DeptotPluhg: _ 56" 1& ww. i 0 PVC I with jintstrom . 1 with jim trom `Screen Record: Type. Diedrich I am oa [ER -- ] 5* 4 +010 PVC I with _____joints from .- 1 ers Typeof Seal at Bottom PVC :plug 1 77/8 nchtiom o ton I crn w BO " IC Amount Size 15004 1/8x1/4 I `Source: Smith Concrete From To 30 56" 000373 4 1 WELL LOG Feet ice Washed Samples Deen I 0 w__28 Brown clay, stiff 4 2382 to__3320 Bbrroowwn ssaannddyy collaayy. sos : 38 w__ 41 Gray sand, traces of clay (more clay) 1 41 w__56 Sand and gravel, fine sand 1 56 _w_ 60 Gray shale spoons 4 32 w_ 34 Sand, traces of clay, brown 37 _w__ 38 Brown sand, traces of clay 1 38 w__39 Gray sand, traces of clay 1 39 w__ 42 Washed 42 w__44 sand and gravel 1 42 to__47 Washed 47 w__49 sand and gravel 1 47 _o__52 Washed 5.36 Gia Te Lengthof test hes. See Well Test Data Sheet Dated, 0 REMARKS: ---- --e -- e-- e-- eA--------eer eet Rg r-- o ------------e-- ee------------ --e-- SE-- --------e ----e-- Fy -- --------------------------7"------ me-- ee--------e FE -- 1 FE ---------- 1 000374 ; WELL IromuATION = DRIFTWELLS oh Co = The layne Ohio Company 2 WATERACSEUPSPLcYouSr,EWe RmVmICES ` J WATER WELL16S21+VLuAYkNEAPvUrMPS + TCESToDRlILOiLNINnG432,2W8ATE+R 6T1R0E)AT76M1E1N9T5EQUIPHENT 1 Nameof ob___ Little. bcking Sewer & Water d Gyorvike_ILittle Hocking WallNo: __TW=-_ orile:__D. Havens Date __ 11/2/84 sw_ohio nig_Rotary = Well Location: sein Tn, amd fti___dofthe Romie 0 cornerof Counny. Otherwiselocated ss __300' west of T.H. #4 ~ WoCarsiknBgeRgeacno:rdA10e /31/s 84 as d romWe eoxirsktiCnogn mprloeuted:ia1a0t!/t3a1w/e8l4was Gedwe.llDeptotPlohg:__56" (Am ve Weim ew 51 a 40 PVC win jeinstrom - with ____ joins from with _____ joirs trom = `Screen Record: Type Diedrich Amowt Di. Opening Mater st 4 .010 PVC wih joiotstrom . - with ___ jintstrom Tyofp Seae lat Bottom_ Hols Record: PVC plug 1.7/8 inch from 0 to 60" inch from. Gove Pack Record: Camo Sie Sour from To 1500 1/8x1/4 Smith Concrete 30" 56" 000375 we SEEOTHER SIDE | | WELL LOG Feet Feet Description 0 w__16 Brown clay, stiff : 16 w__36 Brown sandy clay with traces of gray clay 36 w__42 Sand and gravel (small) 42 w_ 56 Sand, some small gravel (mostly sand) 56 w__ 60 Gray shale WollTet uta: SticLvl 18" 3"; pumping lve ster hourspumpingat apm. Lengthoftest rs.SeeWell TestDataSheet Dated, REMARKS: ) 000376 ATT 1 i : 1G WELL INFORMATION - DRIFT WELLS I Bs. The layne Ohio Company SINRetvS s SO I rTa --_-- aonEC m eins-- | ers sate tocktng nates & sever owe 1128-85 Ciyorvile_yrittle I werner Hocking EE a-- yma J notoem -- crm SG Tl swe ohio r_notary get, Te : : cree com i Se omsWoomrkCorompt 11A-1L9E-S85 rom Oa Werth wi wweettest: 351 --_-- 53% ud 40 sent Tom_coo rn On, pn se ow we mpe tm mw e B.V.C. _ with _glue joints from _ S1' w_ 11" wa vc we pisses " --_-- wh emstem_ ow dram Typeof SealatBottom _P,V.C. cap _--_-- :. 8% Grete ee wit inchfrom 0 "to 56" Aron " sour om " 600 bs. 4s Perry 56 LY feu fee 0 to 8 8 to 18 18 28 28 o__38 4a o__s6 ww wet os Descriion Hard brown clay, 5000 lbs. P.D. Med. to hard brown sandy clay, 0-1000 P.D. oft sandy brown cla 0 P.D. sandy silt and soft brown clay, 0 P.D. Sand and gravel, 0 .n. Grav shale - ! _ EE _ _ | | ee _-- i -- i eee ------------------------------ _ _ = -- A ee -------------------------------------------- Vo sommes: summit aint sir... ssssimsingn som [ee He. SesWell esDtShes Oe, newARKs: r BEN collected water samples and water static levels r P.D. = Pull Down on drill bit r 000378 L Fagiin Reynolds Supply, Inc. `COMPLETE MUNICIPA&L INDUSTRIAL WATER SYSTEMS ha 2 FORMATION LOG OF WELL surtiogOate --0/20/87 finsheq 10/21/80 NymberTest Hole 10 Ouner LITTLE HOCKING WATER DISTRICT |ocuion . ToTAL oEPTH FORMATION PE Top Soil and cla 5-10 [soa Zo [sola 520 |5.| clay Comes IT oy 25-30 [5| coarse sand and graves Sos Coarse sand and Gravel i= ko [51 Fine sand and raver - _bo_- us Is Fine sand and gravel ne sand dnd sone gra : 50-5 Sand and gravel 8 [7 eearoa "Stic Water Level --_---e-- e OewDown i RDi) Reynolds SuCpOpMlPyL,ETIEncM.UNICIPAL & INDUSWATTERRSIYSATELMS %y FORMATION LOG OF WELL "tarting Date 10/27/8 Fini7 shed 10/22/8w2 eil NumberTest Hole 11 - Swner_LLIITTITLLEEHOHCOCKKIINNGG VAATTEERRDDiIsSTTRRIICCTT {cation _-- . CoSso a Ios |G rite and 1a Jos 5-20 [5| sandy erm Sandy clay 2-25 2, - 30 [eT sandy ctay sand (vet) I3 =s [51 tCleeanrsaand and graves wo us 5 Coarse sand and gravel } : 4 50 5 Coarse sand and gravel 0-55 56 [5 Coarse sand and gravel Fine sand and gravel - 60-6: [31 Fine sand = LT hedrock - rea cra = [-- r Bowell a [1 i : omwoew 660380 (i) Reynolds Supply, Inc. FER COMPLETE MUNICIPAL & INDUSTRIAL WATER SYSTEMS yy FORMATION LOG OF WELL Starting Date 10/2878, Finished 10/28/80jun mor TESTHOLE 12 Owner _LUTILE HOCKING WATER DISTRICT (oepion . Tos sr Top Soil cto | 5s | sendy clay o- Sandy clay Soo | 5.| sensei 0-25 | 5 | vet sandy clay 25-30 | 5 | Wet sandy clay To Te"wo [5s| || Coarse coarse sand sand and and gravel arever me aan - Tw osrse sand and gravel : 0 [5| coarse sand sng gravel csso59 |00 Fine sand and gravel 5 1 oedrou . : 1] I. -- I ! | I" 1 1 | -- - : 000381