Document 9VGNQkZRKpXRrqN3veQELXRV

DuPont 2004 Multi-Media Sampling Plan WV and OH January 15, 2004 AR226-2354 EXP000190 Jammy 15,2004 DuPon, "Phase 2" Media to be Sampled bv DuPont in 2004 in WV and OH Air Private Water Sources Public Water Sources Soil Biota EXP000191 [above listing excludes sampling required by permit] January 1 5 ,2 0 0 4 DuPont DuPont Washington Works Area Air Modeling/Samnling Completed - Air dispersion modeling completed and updated for ambient air concentrations (Time periods: year 2002 and 9/02 - 8/03, AR226 and ECA docket) In-progress - Fence line sampling in progress to compare results from ambient air sampling and air dispersion modeling to understand how modeling predictions relate to measured ambient air concentrations EXP000192 January 1 5,2004 DuPont 3 Air Objective: Compare results from ambient air sampling to air dispersion modeling. Detail: Verification study of ambient air in community locations Locations: Eight representative sample locations for four wind directions and a range in predicted concentrations Number of Samples: 56 (8 locations/7 events) Frequency: 7 events over 6 weeks Duration: 24 hours Analytical Methodology: Validated method conducted by Exygen. Acetone extraction followed by LC/MS/MS with PQL of 0.1 ug/m3. [Docket no. OPPT-2003-0012-0317 to 0320] EXPQ00193 January 15, 2004 DuPont 4 Rationale for Air Sample Locations Representative o f all major wind directions Access to property is feasible Locations in both Ohio and West Virginia Representative o f a range o f predicted concentrations (min - max) EXP000194 January 1 5 ,2004 DuPont 5 SS-OOOdXg X DuPont Washington Works Area Water Sampling/Monitoring Private Water Sources - WV and OH Public Water Sources - WV and OH Ohio River Washington Works Surface Water and Groundwater Monitoring Ohio EPA proposal specific to Little Hocking Well Field EXP000196 January 15, 2004 DuPont 7 DuPont Washington Works Area Private Water Sources (WV & OH) Off-site sampling - completed - WV Multi-Media Consent Order (MMCO); final GIST report - ~250 Samples in a two mile radius (WV and OH) - Includes wells, springs, and cisterns EXP000197 January 1 5 ,2 0 0 4 DuPont 8 Private Water Sources Objective: Continue to monitor trends in PFOA concentrations Detail: Quarterly or annual sampling of private water sources (i.e., groundwater wells, springs, and cisterns) at locations near the Washington Works facility/Local Landfill (WV and Ohio), Dry Run Landfill, and Letart Landfill. Locations: 10 in WV, 10 in Ohio, 10 near Dry Rim, and 2 near Letart Number of Samples: 122 Frequency: Quarterly all areas, exception annual at Letart Duration: 1 Year Analytical Methodology: Current validated LC/MS/MS aqueous method utilized by Exygen (PQL is .05 ug/L). [Docket no. OPP-T2003-0012-0040] EXP000198 January 15, 2004 DuPont 9 Rationale for Private Water Source Locations Follows recommendations per WV Multi-Media Consent Order/GIST: Drinking water wells Drinking water springs Non-Drinking water wells Springs and cisterns One well and spring used for cattle where prior sampling results were > 5 ug/L EXP000199 January 1 5 ,2 0 0 4 DuPont 10 EXP000200 |I i I II EXP000201 Januar} LEGEND: NON DRINKINO WATER SAMPLE * DRINKINO WATER SAMPLE PRO PO S ED GROUNDW ATER MONITORING LOCATION (S) SPRING SAMPLE (C) CISTERN SAMPLE 0 . 2 C -S CO N CE N T R A TIO N (US/) 290 M AP TAKEN FROM THE LBECK. WV U S C S OiuanORANCLE _ S ** L E 0 290' m m Cotilo r iWiflndnLnn LVm b C - 8 IN GROUNDWATER Bfj A lonMiH UN. Wm I VMfMa r r 1 1______ 12 EXP000202 January 15, DuPont Washington Works Area Public Water Sources WV & OH) Off-site & on-site sampling - completed - WV MMCO; final GIST report -- 16 public water systems sampled 7 miles upstream to 57 miles downstream (10 systems sampled multiple times) EXP000203 January 15, 2004 DuPont 14 Public Water Systems Objective: Continue to monitor trend in PFOA concentrations in public water systems near Washington Works Detail: - Quarterly or annual sampling of public water systems near site, including Little Hocking WA, Lubeck PSD, General Electric, DuPont, Blennerhasset Island State Park, Mason County PSD, Racine Lock and Dam PSD, and Tuppers Plains-Chester PSD - Install four monitoring wells at Little Hocking WA to monitor shallow portion of saturated zone Locations: 8 (includes the four new monitoring wells at LHWA) Number of Samples: 121 Frequency: First four will be quarterly, second four annual; Saturated zone to be sampled quarterly Duration: 2 Years * Analytical Methodology: Current validated LC/MS/MS aqueous method utilized by Exygen (PQL is .05 ug/1). [Docket no. OPPT-2003- 0012-0040] Januaiy 15,2004 DuPont 15 EXP000204 Januar) EXPQ00205 DuPont Washington Works Area Ohio River Water Sampling River Sampling - completed - WV MMCO, GIST final report Samples taken 28 miles upstream to 46 miles downstream 12 transects, various depths and cross river locations 49 samples taken Additional sampling - to continue via site and landfill outfall monitoring permit requirements EXP000206 January 15, 2004 DuPont 17 DuPont Washington Works Surface water and Groundwater Monitoring Groundwater and surface water sampling - completed - WV MMCO; final GIST report 19 groundwater wells and 6 outfalls sampled Over 250 samples taken Groundwater and surface water monitoring additional work - Outfall sampling - monthly, quarterly, and semi-annually depending on the outfall (permit) - Process treatment outlet monitoring - weekly (permit) EXP000207 January 1 5,2004 DuPont 18 Vw**' DuPont Soil Samplins/Modeling Completed work Adsorption/desorption testing - APME Report, ECA Docket Over 200 on-site samples (ECA docket- Washington Works RCRA Facility Investigation) 2 off-site samples - (Sampling Investigation Results Little Hocking Water Association Well Field, April 2003) EXP000208 January 15,2004 DuPont 19 1 Soil Objective: Determine range ofPFOA concentration in off-site soil. Detail: Surface soil sampling will be conducted at locations in WV and OH. Sampling locations consistent with groundwater and ambient air monitoring locations. Events will be conducted after wet and dry weather conditions. Locations: 10 in WV and 10 in OH Number of Samples: 40 Frequency: 2 Events (dry and wet) Analytical Methodology: Current validated LC/MS/MS method utilized by Severn Trent-Denver (PQL of 0.19 ug/kg). [Docket no. OPPT-2003-0012-xxxx] EXP0002Q9 January 1 5,2004 DuPont 20 Rationale for Soil Sample Locations Representative o f all major wind directions A ccess to property is feasible Locations in both Ohio and West Virginia Representative o f a range o f predicted concentrations (min - max) EXP000210 January 15, 2004 DuPont 21 EXP000211 Biota - WV Fish Study Fish from the Ohio River at Belleville Dam 4 species, 16 samples A ll results were Non-Detect EXP000212 January 15, 2004 DuPont 23 Biota Objective: Determine if PFOA is present in grass, and determine if air deposited PFOA is present on grass surface. Detail: Sample grass/vegetative layer at each soil sampling location. Will include grass, grass litter layer, and root zone (with soil removed). A "washed" sample will likely be conducted at some locations during "dry" event (prior to sample homogenization) Locations: 10 in WV and 10 in Ohio Number of Samples: 40 (plus some washed samples) Frequency: 2 events (dry and wet) during soil sampling Analytical Methodology: A validated analytical method does not currently exist (in progress, but will be in-place before work is conducted). EXP000213 January 15, 2004 DuPont 24 EXP000214 Evaluation of Off-site Soil/Biota Results The 40 total soil and 40 total biota sample results will receive basic summary statistical analysis to determine. - m inim um and maximum concentration - median - mean (if all results > than ND) These results w ill form a baseline off-site soil/biota data set. If warranted, this data set will then be utilized to formulate objectives and scope o f work for additional off site soil sampling. EXP000215 January 15,2004 DuPont 26 DuPont Summary Proposed "Phase 2" Monitoring Activities Air Air dispersion model verification with off-site sampling Water Install four wells to monitor the shallow portion of the saturated zone in the Little Hocking well field Private water monitoring at 32 locations Public water system monitoring at eight locations Soil Conduct two surface soil sampling events at twenty locations (10 in Ohio; 10 in Wva); one after dry period and one after rain event Biota Sample grass in the same location as the surface soil sampling January 1 5 ,2 0 0 4 DuPont 27 EXP000216 Peer Consultation Process Concept drawn from the Voluntary Children's Chemical Evaluation Program Guidelines Advisory Group Third party technical experts Independent/No conflict o f interest W ill review results o f Phase 1 and Phase 2 monitoring activities and the industry proposal(s) for Phase 3 activities and provide feedback on the proposal(s) EXP000217 January 15, 2004 DuPont 28 Statistical Analysis o f Off-Site Private Water Sampling in WV and Ohio State Source R a d iu s (m iles) Sam ple Size N um ber (%) Q uantified M edian W 1) S ig n ific a n c e O hio Spring/C istem W ell 0 to 1 Ito 2 0 to 1 1 to 2 21 4 48 59 21 (100) 4 (100) 43 (90) 40 (68) 4 .9 7 0.48 0.92 0.21 p < 0.01 p < 0.01 W est V irginia Spring/C istem W ell m X oo"oO N3 January 1 5 ,2 0 0 4 0 to 1 1 to 2 0 to 1 Ito 2 10 13 38 52 DuPont 10 (100) 12 (92) 38 (100) 39 (75) 2.06 0.90 1.73 0.36 p = 0.02 p < 0.01