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4 Y <br /> 4;MMN g <br /> T . <br /> Clayton <br /> ' E�t1R{}tivE\til . <br /> _ CO�SL'lTi�t9 <br /> Orchard Supply Hardware retained Clayton Environmental Consultants Inc, <br /> to <br /> conduct a limited shallow soil boring program. We conducted this program to define <br /> the horizontal and vertical extent of total recoverable hydrocarbons identifie <br /> soils on the Orchard Supply <br /> Line Road in Tracy, California.I n Property at <br /> Claytocorner n wasare ainur edto locate arid <br /> Drive and G ant e <br /> € ro a-1 <br /> P P •Y abandon a second septic tank onsite. Clayton had previously abandoned a <br /> septic tank on August 17, 1990(Figures ] and 2). <br /> Mr. Michael D. LaTourette, Director of Real Estate, authorized this Pro'ect o <br /> March 29, 1991, by accepting Clayton's Proposal No, 91-B-045 and it accompanying <br /> n <br /> terms and conditions. Clayton commenced field work on A <br /> a permit to install the boreholes from the San Joaquin County Public Health ponying <br /> April S, 1991, after obtaining <br /> (Figure 2). A copy of the permit application is provided in Appendix A. Services <br /> Clayton alio obtained a permit for septic tank destruction from San Joaquin County <br /> Public Health Services, and on April 25, 1991 <br /> • the proper destruction of septic tank#2 (Figure <br /> rA copy of the work that t application <br /> is provided in Appendix D. PY permit application <br /> In addition, Clayton conducted a quarterly water sampling of manitorin well <br /> on May 2, 1991, g MW-3B <br /> 2.0 <br /> or January$, 1991, Clayton installed a new <br /> i forl d <br /> mer underground storage tank excavation toreplace gthel monitownoringwelldestroyedthe <br /> during recent excavation (Clayton Project No. 32649, dated Fe W <br /> s sampled all three existing wells. In soil samples collected from 4 fee 11' 1991), We <br /> surface during construction of tf a new monitoring well, MW-3B we below ground <br /> milligrams per kilo ram m detected 770 <br /> g ( g/kg} total recoverable hydrocarbons. <br /> Based on these <br /> �. <br /> findings,s, Clayton <br /> soited naon soil boringto define the horizontal and vertical extent of oil cntamiiprogram <br /> 3.0 <br /> Installation and sampling of Fve <br /> !in boreholes (BU-1, BH-2, . ; and BH-5 <br /> quarterly.-Water sampling g of BH-3, BH-4 <br /> monitoring well MW- , was performed in accordanceand <br /> 313 <br /> with.Clayton's drilling, well construction, and sampling protocols (Appendix B). The <br /> borehole installation was observed by Ms. Dian <br /> {r Diane M. Hnson, San Joa uin CountyPublic Health Services, Supervising Environmental Health Inspector. <br /> ; <br /> Mr. Gregory Olivers, San 3oaquin County Public Health Services, Environmental <br /> ! Health Specialist, was present to observe field work for destruction n it <br /> e septic tank. <br /> 'i <br />