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STATE OF CALIFORNIA PETE WILSON Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD, SUITE A <br /> SACRAMENTO, CA 95827-3098 <br /> PHONE: (916) 361-5600 <br /> FAX: (916) 361-5686 <br /> 21 February 1992 2 5 5� <br /> r t <br /> hL t <br /> Mr. Dave Atwater <br /> California Fuels <br /> Post Office Box 1270 <br /> Stockton, CA 95201 <br /> SOIL CLEANUP CONFIRMATION, CALIFORNIA FUELS, 838 MOKELUMNE STREET, WOODBRIDGE, <br /> SAN JOAQUIN COUNTY <br /> We have reviewed your 10 January 1991 response to our 17 October 1991 <br /> requirement, repeated on 19 December 1991, that you submit a Work Plan <br /> locating the soil samples necessary to establish whether you have completely <br /> removed or cleaned up the polluted soil at the subject site. Attached to our <br /> October and December letters was a memorandum which clearly describes the <br /> basis for our concern that substantial volumes of highly polluted soil may <br /> remain below ground on the site. <br /> Neither the November nor the January proposal responds to our concern. The <br /> November response described boreholes you drilled to evaluate the extent of <br /> the contaminated soil before treatment. Samples from these boreholes were <br /> clean, thereby establishing the extent of pollution. However, samples taken <br /> after excavation showed pollution still existed, with no confirmation that it <br /> was removed. <br /> In the inadequate January response, you propose to drill four of the five <br /> boreholes outside the excavation, at :bout the same distance from the <br /> excavation as the preliminary boreholes mentioned above. Therefore, you are <br /> proposing to sample soil already known to be clean. The proposal locates the <br /> fifth borehole inside the excavation. <br /> All the boreholes must be drilled within the excavation dug by your <br /> consultant, Aegis Environmental , Inc. The memorandum attached to both our <br /> October and December letters clearly explains the nature of our concern: after <br /> finding high pollutant concentrations in soil samples at two depths in the <br /> excavation, you should have sampled at the next deeper level directly beneath <br /> the "hot" samples. You should have continued sampling at deeper levels until <br /> samples no longer contained total petroleum hydrocarbons at concentrations <br /> exceeding the cleanup objectives. <br /> Therefore, in accordance with California Water Code §13267, by 13 March 1992 <br /> you are required to submit a work plan locating a sufficient number of <br />