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i <br /> WEISS .ASSOCIATES Considiinq in Geology 6 Geohydroloyy <br /> t <br /> 29381~r Clurc S(reef, O,t1.ltlncl, G1 94609 415-465-1100 <br /> 16 December 1987 <br /> Julian Munoz <br /> Safeway Stores, Inc. <br /> 1111 Navy Drive <br /> Stockton, CA 95204 <br /> Dear Mr. Munoz: <br /> As we discussed on the telephone on 11 December 1987, this letter <br /> presents revisions to our 13 November 1987 proposal- for Phase IIF of our <br /> subsurface investigation at 1111 Navy Drive, Stockton. California The <br /> proposal should be revised as follows: <br /> Page 4: The last sentence of paragraph 2 should be amended to read: <br /> "Any water that accumul;:tes in the enclosure will be pumped by PI into a <br /> Im 10,000-gallon Baker tank anJ will be. treated on site in an activated carbon <br /> filter before it is discharged to the sanitary sewer." <br /> Page S: The third sentence of paragraph 2 should be amended to read: <br /> "The two shallow samples will be analyzed at Brown and Caldwell Ana tical <br /> Laboratories of Emeryville, California BSC for TFHC by GC/FID and for BTX by <br /> EPA Method 8020as chromatography/photo ionization detection GC PID <br /> The additional EPA Method 8020 analyses were requested by Laurie Cotulla <br /> of the San Joaquin Local H.aalth District (SJLHD) due to California Regional <br /> Water Quality Control Board - Central Valley Region (WQCB-CVR) concerns about <br /> the validity of the GC/FID analysis for BTX. A revised budget for Phase III, <br /> which includes costs for the additional analyses and administration of the <br /> changes, is presented in Attachment A Since delays have postponed the start —of Phase II beyond December 31, costs for all tasks have been revised using <br /> A Div,Mon of AguaTierra Associdtes Incorporated <br />