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1 <br /> o BRUNSING ASSOCIATES, INC. <br /> 1607 Industnal Way, Belmont, CA 94002 <br /> (415) 637-0170 FAX(415)637-1196 <br /> I <br /> January 27', 1992 FILE C 260 <br /> ' <br /> Mary Meays <br /> San joaquin County <br /> ' Public Health Services, <br /> Environmental Health Division <br /> P O Box 2009 <br /> ' Stockton, CA 95201 <br /> RE: PIEZOMETER DESTRUCTION <br /> DOANE PRODUCTS COMPANY <br /> ' 450 E. GRAN'TLINE ROAD,TRACY, CALIFORNIA <br /> SITE 4 2441 <br /> ' Dear Ms Meays: <br /> Please find enclosed the permit to destroy piezometer P-1, at the Doane Products <br /> Company facility m Tracy, California. <br /> Dunng remedial excavation to remove soil contamination on December 10, 1991, <br /> ' petroleum hydrocarbons were found to exist beyond the location of piezometer P-1 <br /> on the east side of the excavation. An in-field decision was made to destroy the <br /> piezometer in order to remove the soil containing petroleum hydrocarbons to meet <br /> remediation levels. The piezometer was subsequently destroyed by excavating to a <br /> depth of 12-13 feet. The entire 16 feet of casing and screen were removed from the <br /> excavation. Drain rock was placed in the excavation from a depth of 13 feet up to <br /> ' four feet. The backfilling of �Q the surface ampaeavation was tedeted with Class II to 9 percent maximum dry <br /> ate <br /> Base from a depth of four feet <br /> density + <br /> ' ThisP ermit has been signed under authorization of Jim Klemfelder of Spectrum <br /> 28, 1991 <br /> Exploration (C-57 License site a�e�smenwho <br /> k placed copythe <br /> o piezometer <br /> rhletter Fof aut�horizatZon as <br /> ' <br /> part of the preliminary s <br /> included with this letter <br /> 1 <br /> 1 <br />