SITE INFORMATION AND CORRESPONDENCE

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v Working To Restore Nature RESNA maintains that this former well poses no threat as a potential conduit for vertical transport of contaminants because all portions of the well from approximately 0-18 feet below grade have been destroyed by caving into the excavation, and groundwater currently exists at approximately 10 feet below grade. Excepting the f nced open excavation, no vertical conduit exists between the ground surface and the water table in the vicinity of the former tanks. The excavation pit will eventually be backfilled and covered with asphalt paving, further reducing the potential percolation of surface waters. Furthermore, confirmation samples collected from the sidewalls and floor of the excavation indicate thal all residual soil contamination, including that below the capillary fringe, was removed through excavation activities. Enclosed please find a completed well destruction permit application and associated fee related to the destruction of well MW-1 during excavation activities. Stockpiled Soil Based upon field screening using a photoionizatio detector (PID) on December 9, 1993, stockpiled soils contained between zero and 23 s per million (ppm) volatile organic compounds (VOCs). It is our understanding that soils containing less than 50 ppm VOCs are exempt from formal aeration requirements. Consequently,. stockpiled soils were manipulated on April 28, 1994 to promote natural degradation of petroleum hydrocarbons. No hydrocarbon odors were evident during this process. To characterize current conditions within the soil st kpile, RESNA proposes to collect a total of 30 discrete soil samples (one per 50 cubic yards), in accordance with PHS/EHD correspondence dated March 24, 1994. Samples will be analyzed for benzene, toluene, ethylbenzene, xylenes (BTEX), and total petroleum hydrocarbons as gasoline (TPHg) by EPA methods 8020 and modified 8015, respectively. PH /EHD will be notified at least 48 hours in advance of sampling activities. Groundwater Sampling In accordance with PHS/EHD request, McAllister rrust will resume groundwater sampling activities at the subject site. Third quarter 1994 sa pling activities will be scheduled at the earliest convenience of McAllister Trust, anticipated to be the week of August 29, 1994 or the week of September 5, 1994. RESNA will collect groundwater samples from monitoring wells MW-1, MW-2, and MW-3. In addition, a groundwater sample will be collected from the excavation pit. Samples will be analyzed for BTEX and TPHg. PHS/EHD will be notified at least 48 hours in advance of sampling activities A site status report will be submitted at the close of third quarter 1994 activities. Pending analytical results, RESNA will schedule further groundwater sampling, or request site closure as appropriate. 1500591L-083194.FNL