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� J)✓IV1 t5T=r1M1C:VN A��UI.IA1C� �i1L- 1-71t . 1c} 1cl r L.irnvir .inv�rw ••.-.._.. <br /> EMCOR AsCssaciates <br /> 1433 North Mark&Bex,levord■Sacramento,CaliPgrr,ia 45634-1443 928-9304■Fax(916)928-33111 I <br /> J <br /> December 1, 1994 <br /> Project 0952-088.022 <br /> i <br /> E <br /> Mr.Michael lnfuma <br /> San Joaquin County Public Health Services <br /> Environmental He4th Division <br /> P.U. Box 388 <br /> 455 North San Joaquin Street <br /> Stockton,CaMbrnia 95201-388 <br /> 1 <br /> Re: Addendum to Proposed Assessment Activities. British Petroleum (BP)Station No. 11190, <br /> 1206 March Lane,Stockton,California <br /> E <br /> Dear Mr. lnforna: <br /> Due to drill rig availability constraints, EMCON Associates is�roposing the following changes to <br /> the workplan for the BF Station No. 11190 addressed to you and dated November 15, 1994: <br /> ii <br /> • Soil borings will be drilled with 8-inch-diameter hollow--stem auW drilling equipment. <br /> ' I <br /> • Soil samples will be collected with a stainless steel;split-spoon sampler lined with brass I <br /> Slee ve& ii <br /> + Soil borings will be baucicfilled with cement bentonite slwy. If groundwater is <br /> encountered in any baring, the goring will be baekfilled with holeplug bentoniz to a <br /> depth of 1 foot above the observed water levelii and the remaining space will be <br /> backfilled with cement bentonite slurry. <br /> i <br /> I <br /> Soil cuttings will be stockpiled on and covered with plastic on site. Based on soil <br /> analytical results,an appropriate disposal method will be selected. <br /> 1fou have any y questions regarding the proposed changes,please feel:free to call <br /> Sincerely. I <br /> EMCON Associates <br /> J Laudon Husk <br /> Staff Geologist Project Manager <br /> GE.G. 1530 <br /> i <br /> CC*. Mike Noll,EMCON N Northwest,Bothell <br /> Larry Silva,Tosco Northwest Company <br /> hACJP7iU09S7J09tS20RE(►.2[sM-94/po■:t <br /> i <br /> y <br />