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x S <br /> EMCOR Assyciates �1 <br /> 1433 North Market Boulevard •Sacramento,California 95834-1943 •1(916)928-3300•Fox(91b),928-33411994 <br /> 1 r,v <br /> EN IR NI N1MEVIHESLTH <br /> November 15, 1994 <br /> Project 0952-088.02 <br /> Mr. Michael Infurna i� , E <br /> San Joaquin County Public Health Services � �1 <br /> Environmental Health Division ' <br /> r Post Office Box 288 _ N ) <br /> 455 North San Joaquin Street <br /> Stockton, California 95201 ENViRCJNfViENiAL HEALTH <br /> LTV's <br /> PUZINIMSERViCE 1 <br /> Re: Proposed Assessment Activities,' British Petroleum (BP),Station Number 11190; <br /> 1206 March Lane, Stockton, California <br /> Dear Mr. Infurna: <br /> ;i <br /> EMCON Associates (EMCON) is proposing to collect soil samples for chemical analysis ` <br /> at four locations using cone penetrometer (CPT) drilling methods at the BP service station <br /> mentioned above. This work is being done as part of a property transfer baseline <br /> assessment. ; <br /> The borings will be at the locations shown on the enclosed figure. One soil boring will be <br /> in the vicinity of the existing underground storage tanks (USTs), two soil borings will be <br /> f drilled in the vicinity of the pump islands, and one boring will be drilled at the location of <br /> the former UST complex. <br /> Soil samples will be collected at approximately 5-foot intervals'from each boring using a <br /> stainless-steel geo-probe sampler. Up to two soil samples from each boring will be <br /> submitted for total petroleum hydrocarbons as gasoline benzene, toluene, ethylbenzene <br /> and xylenes (TPHG/BTEX) and total petroleum hydrocarbons as diesel-extended (TPHD- <br /> extended) analyses. In addition, at least one soil sample collected from the boring adjacent <br /> to the northern pump island will be submitted for chlorinated solvents (Environmental <br /> Protection Agency (EPA) Method 8010), and polychlorinated biphenyls ([PCBs] EPA ; <br /> Method 8080) analyses. The sample submitted for PCB analysis will be .held pending <br /> review of initial lab results. <br /> The soil boring driven in the vicinity of the former UST complex will be advanced to <br /> first-encountered groundwater or to a depth of 65 feet. If groundwater.is not encountered <br /> before 65 feet,the boring may be driven deeper if evidence of impacted soil is observed. If <br /> groundwater is encountered, a grab groundwater samplewill be collected from the boring <br /> t with a HydroPuncho sampler. The water sample will be submitted for TPHGBTEX, <br /> TPHD-extended, and chlorinated solvents analyses. The remaining borings will be driven <br /> SAC/PJM52/09520880.2AL-94Afc:2 <br />