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Emeon Assciates <br /> 1433 North Market Boulevard •Sacramento,California 95834-1943•,(916)928-3300• Fax(916)928-3341 <br /> December 1, 1994 <br /> Project 0952-088.02 <br /> Mr. Michael Infurna <br /> San Joaquin County.Public Health Services <br /> Environmental Health Division <br /> P. O. Box 388 <br /> 455 North San Joaquin Street <br /> Stockton, California 95201--388 <br /> Re: -.QddendLm to ;Propose,+ At;».zssrrient Acfivities .British PPtroleum::(BP) <br /> = E Sr <br /> 1206 March Lane, Stockton, California <br /> Dear Mr. Infurna: <br /> Due to drill rig availability constraints, EMCON Associates is proposing the following changes to <br /> the workplan for the BP Station No. 11190 addressed to you and dated November 15, 1994: <br /> • Soil borings will be drilled with 8-inch-diameter hollow-stem auger drilling equipment. <br /> r • Soil samples will be collected with a stainless steel'split=spoon sampler lined with brass <br /> sleeves. <br /> I <br /> • Soil borings will be backfilled with cement-bentonite slurry. If groundwater is <br /> encountered in any boring, the boring will be backfilled with holeplug bentonite to a - <br /> depth of I foot above the observed water level, and the remaining space,will be <br /> backfilled with cement-bentonite slurry. <br /> t - <br /> • Soil cuttings will be stockpiled on and covered :with plastic on site. Based on soil <br /> analytical results_an,apprppriate disposal;method.wrll;tr selected. a <br /> If you have any questions regarding the proposed changes,please feel free to call. <br /> Sincerely, <br /> EMCON Associates e <br /> = J e Laudon Robert H. Husk <br /> Staff Geologist. <br /> Pr M of{ � i <br /> g <br /> Project Manager <br /> ager <br /> ' <br /> C.E.G. 1530 1(i <br /> cc: Mike Noll, EMCON Northwest,Bothell ; <br /> Larry Silva, Tosco Northwest Company tNVIRONIV <br /> PERMIT OaS <br /> I SAC/PJM52/09520880.2BM-94/Pas:l <br />