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01 March 2002 <br /> AGE-NC Project No 95-0130 <br /> Page 2of10 <br /> utilizing a B-95 high torque, truck-mounted drill ng equipped with 8-inch diameter hollow-stem <br /> augers All soil cuttings generated from drilling activities were stockpiled on and covered by plastic <br /> sheeting in a southwest section of the site, soil bonng/momtonng well locations are depicted in <br /> Figure 2 Ground water monitoring well Installation procedures for the site were outlined In Work <br /> Plan Addendum -June 2001, dated 11 June 2001, prepared by AGE and approved by San Joaquin <br /> County Health Department (SJCHD) by letter dated 06 July 2001 (Appendix A) <br /> 21 SOIL SAMPLING <br /> Continuous soil sampling was performed from surface grade to 150 feet bsg at MW-6 and from 60 <br /> feet to 150 feet bsg at MW-7 utilizing a stainless steel, 2-inch diameter macro-core sampler The <br /> Isampler was continuously driven In five-foot Increments by dropping a 140-pound weight from a <br /> height of 30 inches Boring logs are In Appendix A <br /> Selected soil samples were collected from the middle section of the macro-core sampler utilizing a <br /> 2-Inch by 6-Inch brass sleeve Each selected soli sample was preserved by covering both ends of a <br /> liebrass sleeve with Teflon sheets and plastic end caps and sealed with duct tape Each preserved <br /> sample was labeled with monitoring well designation, depth, time, date and sampler's Initials <br /> Each preserved sample was logged on a chain-of-custody form, placed In a chilled container and <br /> transported to a California Department of Health Services (DHS)-certified laboratory for analysis <br /> for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) by EPA Method 8015M, <br /> • Benzene, toluene, ethylbenzene and xylene(BTEX) and methyl-tertiary butyl ether(MTBE) <br /> Iby EPA Method 8020, and <br /> • Methanol, ethanol, ethylene dibromlde (EDB), 1,2-dlchloroethane (1,2-DCA), tertiary <br /> butanol (TBA), di-isopropyl ether (DIPE), ethyl tert butyl ether (ETBE), tert amyl methyl <br /> ether (TAME), and confirmation of MTBE by EPA Method 8250 Modified <br /> 22 EQUIPMENT DECONTAMINATION <br /> lThe hollow stem augers were steam cleaned prior to each bore hole advancement The macro-core <br /> soil sampler and brass sleeves used for sample collection were washed with a solution of Alconox, <br /> and were rinsed with clean tap water prior to each sampling sequence Rlnseate generated from <br /> . decontaminating the equipment was placed In properly labeled DOT-approved model 17H 55-gallon <br /> drums and was stored on-site In an area lacking public access <br /> Advanced GeoEnviranmental,Inc <br />