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4 r � si,.� s.�'dgr'�"„ _ .. a:x� SS{j "£- - ,•}�e "rN� :f rfe'. - <br /> .I.�s•�xyy�`� <br /> n.. <br /> 1.0 INTRODUCTION <br /> • 1. 1 I.3ACKC,ROUNIJ <br /> 11, June 1986, two 10,000 gallon underground gasoline storage <br /> tanks were removed from the Montgomery Ward Auto Service Center <br /> facility located at 5400 Pacific Avenue, Stockton, <br /> (yard) in August 1986, a <br /> California (site) (see Figures 1 and <br /> waste oil tank was removed from the <br /> An investigation of the Site by A. D. Selditch & Associates, <br /> Inc. (ADS) showed that low levels of total petroleum <br /> resent in samples obtained from <br /> hydrocarbons (TPHs) wereu0el2 p Total lead (ranging in <br /> borings 3 and 4 (.see Fig ) • to 36 ppm) was , <br /> co:lcentrations from 6 parts per million [pp�►] ic <br /> present in all of the samples tested. For <br /> ,spe i ftheiregarding <br /> the activities completed at the Site by <br /> eport <br /> entitled "Underground Tank Removal dArea <br /> EvaluatJune ion, <br /> , ontgomery <br /> Ward Site, Stockton, California," <br /> on June 22, 1988, four waste oil tanks were excavated and <br /> removed from the Site. Two <br /> nmentated from <br /> lwere <br /> ServzceScCorp. and <br /> Canone <br /> beneath each tank by toluene, xylenes and a£ the <br /> analyzed for TPHs, and benzene, resent in any <br /> ethylbenzene (BTXE) . No TPHs or BTXE were p <br /> soil samples tested. <br /> The San Joaquin County Public Health Services Department <br /> (County) requested that a Work Plan bnvestmgationed dofcthe1Site e <br /> " proposed activities to complete the <br /> Environmental Audit, Inc. (EAI) was retained to complete a Phase <br /> II assessment Au the Site. The scope of work for the Phase II <br /> tentitled <br /> tII SiteAssessment <br /> was t },e <br /> ork <br /> forassPhase <br /> MontgomerryWardAuto Se} an <br /> rvice <br /> for P <br /> Center, 5400 Pacific Avenue, Stockton,respondedthe <br /> Plandated <br /> 3n a <br /> January 30, 1991- The County resp <br /> correspondence dated February 15, xe9aredAbyAEAI. TheoWork Plan <br /> plan dated February '25, 1591 was p p <br /> and Addendum were approved by the County in a letter dated March <br /> 13, 1991. <br /> ,g <br /> E - <br /> t <br /> pro' ect No. 1232 <br /> E11'VIRONi1 fEA'TAL AUDIT,IAr. <br />