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DEC 09 '94 e2:57PM FUGRO WEST ROSEVILLE P. -'7 GIRO 6MII aomm S Wn[NAC 7b.305-75210 mn C.'m-t CWb,0*.4'm,C.A.6a - .. .... Fugro has a Shell-owned VR Systems internal combustion engine available for soil venting if volatile hydrocarbons are present in the vapor extraction wells or tank basin. The San Joaquin County Air Quality Monitoring District has indicated that a discharge permit will be issued upon receipt of a formal release form for the site. Fugro anticipates the permit can be issued by the end of the day Friday, December 9, 1994. Groundwater and selected soil samples will be delivered under chain-of-custody to a state-certified laboratory for chemical analysis. The suite of analyses and practical quantitation or detection limits to be used are as follows: For soil - a) Total Petroleum Hydrocarbons (TPH), as gasoline, by EPA Method 8015 (PQL = 1.0 parts-per-million (ppm)); and, b) Benzene, toluene, ethylbenzene, and total xylenes (BTEX), by EPA Method 8020 (PQL = 0.005 ppm). For water - a) TPH, as gasoline, by EPA Method 5015 (PQL = 0.05 ppm); and, b) BTEX, by EPA Method 8020 (PQL = 0.0005 ppm). A site-speck safety plan has been prepared by Fugro and will be on site during all field work. Using the scope of work described above, Shell and Fugro intend to investigate and mitigate the fuel release as quickly and efficiently as possible. Site conditions do not appear to pose any immediate threat to public health. No conduits appear to exist on site that may provide any immediate pathway for the migration of petroleum hydrocarbons from the tank basin. it is our opinion that any potential threat to groundwater or to public health can be diminished by proceeding with the field work as soon as possible. Fugro will continue to determine whether potential local or regional receptors are present, and will communicate this information to the SJCPHS. Fugro will communicate the results of the field work to the SJCPHS an a daily basis. When the initial soil boring and well installation has been completed, a formal results report will be prepared and forwarded to the SJCPHS.