Document jvmx9QvJ208yRLrVNo4gmgLQ

1 ' AR226-2 273 s GIST meeting notes May 15,2002 Minnies from the C-8 DuPont meeting May 15,2002 The meeting began at approximately 10:20 am. Attending were Dave Watkins, George Dasher, and Don Criss o f the Division ofW ater Resources (DWR), Chris Negley and Yvonne Anderson, representatives o f the W VDEP's Legal Services, Bill Toomey for the Bureau for Public Health, Roger Reinhart and Karen Johnson o f the US EPA Region III, Steve Williams and Sara Wallace of the Ohio EPA, Ann Bradley the law firm of - Spillman, Thomas, & Battle, and Andrew Hartten representing DuPont. The meeting began w ith a discussion o f water sampling. Andrew Hartten stated that nearly all survey work was now complete, including return visits to certain residences where sampling was to be done. All sampling work is expected to be completed by the end o f the month, May 2002. Sampling has been completed for all targeted wells except those wells that would require extraordinary measures to gain access. Dave Watkins said that those wells would not be sampled unless data from those wells is critical for plume identification. Andrew Hartten went on to briefly discuss the concentration data from the sampling events. Based on the 2-mile data results, the GIST agreed to cease survey/sampling efforts at the current radius extent. Andrew Hartten then discussed sampling efforts in Ohio within the one mile radins o f the Washington Works facility. The hydrogeology o f the Ohio well fields and concentration data from the sampling events were discussed. It was mentioned that some o f the highest concentrations o f C-8 were found in wells screened in bedrock at elevations o f 150 feet above the Ohio River. Bill Toomey asked if the age o f the water had been determined. Steve Williams replied that some of the wells in the Little Hocking well field had been chronologically studied, and possibly other sites. The final report regarding public water supplies is expected to b e completed by mid end o f June 2002. Andrew Hartten then briefly discussed the wells sampled on Blennerhasset Island. It was noted that only one o f the four wells tested on Blennerhasset Island had been installed to provide drinking water - the other wells were drilled primarily to provide hydrologic data. Andrew Hartten stated that only one well on the GB facility used for drinking water (GE well 30) was sampled, as GE gave permission to access that well only -- ---- --------- Preliminary groundwater modeling results were then discussed. Andrew Hartten said that Mark Kozar o f the USGS was also in the process o fbuilding a groundwater model o f the Lubeck area and that model domain had closely resembled the domain model DuPont's modeler had put together, giving high confidence in key assumptions these models were built on. Preliminary groundwater modeling results indicate that hydrologic # communication under the Ohio River is very unlikely. This assumption was confirmed by data taken from boring logs across the Ohio River in the vicinity o f Blennerhasset Island. Well draw down data from DuPont, GE, and the Little Hocking PSD also strongly suggest that no hydrologic communication exists under the Ohio River. Andrew Hartten said that a groundwater divide under the Ohio River would exist even if DuPont ceased v ASHO27098 EID781178 EID781178 GIST meeting n o te May 15,2002 all pumping from their production wells. Models were shown to support that conclusion. The modeling report See Comment ft 2 is expected to b e completed in m id 3fS| * July 2 0 02 . A lunch break was taken at that point. The meeting resumed at 2:25 pm. Andrew Hartten then briefly discussed the final plans for contaminant plume identification. Andrew Hartten stated that DuPont w ill add three more monitoring wells at the main plant as per George Dasher's request, and that four new wells were to be installed at the local landfill site. These additional wells should close any existing data gaps. George Dasher asked for five additional monitoring wells to be installed at the Letart landfill site; two o f these wells have been installed to date, with the installation o f the other three wells to come in the near future. See Comment # 1 Ohio River surface water sampling was then discussed. Dave Watkins stated that sampling o f the Ohio River would begin as soon as river conditions made it safe to do so. The discussion then turned to air monitoring efforts. Andrew Hartten then briefly discussed air monitoring methodology. Split sampling issues were then discussed. It was asked if the two labs handling the samples were "on the same page". It was noted that although there may he some difference in equipment, the procedures used by both labs was essentially the same. Roger Reinhart said that he w ill further explore this. Dave Watkins asked if there was a need for State certification o f labs. The general consensus was probably n o t Other sampling concerns were then discussed. Dave Watkins stated that some citizens called inquiring about the possibility o f sampling their milk, eggs, soil, or having a blood test done. A t present there is no mechanism to do this as the C-8 sampling protocol is for a water matrix only. Andrew Hartten said he will get back to the GIST regarding the protocol for detecting C-8 in soil at a later time. Some citizens outside the sampling perimeter have requested their water to be sampled for C-8. Andrew Hartten said that Exygen has declined to accept water samples from the public due to concerns for sample chain o f custody. . It was determined that no further ff|||||f| | expansion o fthe established PSD sampling p h rim h p l locations was warranted in West Virginia, unless some new data comes in from the field to support the need for additional sampling. It was decided not to sample farther south downriver o fthe sampling area is warranted. The GIST agreed to initiatequarterly sampling o f the Lubek, Little H odring W.A., and Tuppers Plains PSD's in order to continue C-8 concentration monitoring near the DuPont facility. * in an o te in the margin ofthis paragraph, Andrew Hartten asks "Is this PSD's?" My recollection o f this discussion is that it pertains to sampling in general. D. Criss ASH027899 EID78117 9 EID781179 GIST meeting notes May 15,2002 It was noted that some PSD's further south may wish to have their water tested. Andrew Harden said after looking at surface water sampling results and the data from the April sampling events, a decision could then be made as to whether or not DuPont may consider providing training to samplers if the PSD's would cover the cost o fsampling and could satisfy chain o f custody requirements for Exygen. Bill Toomey asked if the reverse osmosis at the Lakin, Mason Co. PSD bad good effect at removing C-8. Pre and post treatment data w ill be looked at to determine this. The Meeting adjourned at approximately 3:30pm. The next meeting will be held at the Division o f water Resources in Charleston orCjuly 3 1 ,2QQS>* to discuss contaminant plume identification. Comment #3 Comment #1 George Dasher pointed out that he had asked for additional monitoring wells at the landfiDs, and no additional monitoring wells at the main plant, and that none o f the wells had been installed to date. Comment # 2 This note was attached to the June 3,2002 fax from Andrew Hartten: " Note: Ran into software problem on base map. Final calibration being slightly delayed." Comment #3 Andrew Hartten: "new date yet?" Comments/changes noted in the Andrew Hartten June 3, 2002 fax are in bhie ASH027900 EID781180 EID781180