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r <br /> F <br /> Page 3 <br /> :,Is. %IFry M_ays <br /> .;ulv lw. i991 <br /> • Benzene, Toluene. Ethyibenzenes and Xylenes tBTE&X) ZPA <br /> ',iethod 8020; and <br /> • Organic lead -- DIIS-specified Method. <br /> Anaiy*ical Lies t G <br /> The findings from the laboratory aoratory reports atesting of soil nchain-of-custody forms <br /> ground water samples <br /> are summarized in Table ... <br /> are attached. <br /> ;analyses of the soil samples collected from the borings for wells NMW-4 and <br /> MW-5 indicated that petroleum hydrocarbons (identified as gasoline) were <br /> I were also detected in soil samples <br /> present in the soil. BTX&E compound <br /> from well MW-5. <br /> Analyses of water samples from wells \,IW-4 and MW-5 indicated that <br /> similar compounds (petroleum hydro^=bons identified as gasoline and <br /> certain BTEX compounds) are present in the groundwater. The highest <br /> concentrations are present directly under the location of tProduct rmer tank. <br /> Figure 1 depicts the maximum probable extent of petroleum <br /> the <br /> ground water. <br /> prnhlgsrnent ReuQU <br /> A Problem Assessment Report(PAR.) was requested by San Joaquin County <br /> in a letter dated April 5, 1991. Phone contact with Ms.Diane Hinson of the <br /> County(June 6, 1991)was followed by a letter dated June 12, 1991 requesting <br /> a time extension for the PAFL The reason for this request was that the <br /> results from two additional underground storage tank removals (at 1325 <br /> and 1541 West Weber Avenue, respectively)are to be included in the report. <br /> 15, 1991. <br /> The County granted a time extension until September <br /> ERM-West, Inc., on behalf of Catellus Development Corporation, is <br /> currently considering several possible interim remedial measures for the <br /> site. The selected interim measure will betargeted at both preventing <br /> reventi a <br /> deterioration in situ conditions and short-term remediation, pending <br /> completion and acceptance of the PAR. <br />