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Page 3 <br /> %Is. \Lary Meays <br /> July 15, 1991 <br /> Benzene, Toluene, Ethylbenzenes ad Xylenes BTE&X) -- CPA <br /> n <br /> _. Method 8020; and <br /> • Organic lead-- DHS-specified Method. <br /> An-i i al it <br /> The findings from the laboratory testing of soil and ground water samples <br /> are summarized in Table 2. Laboratory reports and chain-of-custody forms <br /> are attached. <br /> Analyses of the soil samples collected from the borings for wells MW-4 and <br /> ivlW-5 indicated that petroleum hydrocarbons (identified as gasoline) were <br /> present in the soil. BTX&E compounds were also detected in soil samples <br /> from well MW-5. <br /> Analyses of water samples from wells MW-4 and MW-5 indicated that <br /> similar compounds (petroleum hydrocarbons identified as gasoline and <br /> certain BTEX compounds) are present in the groundwater. The highest <br /> concentrations are present directly under the location of the formert tank <br /> n the <br /> Figure 1 depicts the maximum probable extent of petroleum p <br /> roducground water. <br /> Prablem <br /> A Problem Assessment Report (PAR) was requested by San Joaquin County <br /> in a letter darted April 5, 1991. Phone contact with Ms.Diane Hinson of the <br /> r County(June G, 1991)was followed by a letter dated June 12,1991 requesting <br /> a time extension for the PAR. The reason for this request was that the <br /> results from two additional underground storage tank removals (at 1325 <br /> and 1541 West <br /> antedea tzme extension until September 15 1vely) are to be 9glln the report. <br /> The County gz <br /> T�nfnr;m Remedial Me*,i�.g5. <br /> ERM-West, Inc., on behalf of Catellus Development Corporation, is <br /> currently considering several possible interim remedial measures <br /> for <br /> he <br /> site. The selected interim measure will be targeted at both preventing a <br /> deterioration in site conditions and short-term remediation, pending , <br /> completion and acceptance of the PAR. <br />