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T 1.0 INTRODUCTION <br /> - -�=Penn Environmental, Inc. has prepared.this final report to document the removal of three underground <br /> storage_.tanks (USTs)Yat 221.70.Highw.ay 120, Escalon, California (Figure 1: Site Location Map). G.R. <br /> Kause Cb)istruction, Inc. removed-three underground storage tanks firm the site; two tanks were <br /> approximately 500 gallons and one was approximately 250 gallons. Due,to the close proximity of the <br /> tanks, the process of the tank removal left one large excavation, approximately 22'x1 TxT in size (see <br /> Figure 2). <br /> Penn Environmental was contracted tb oversee all work activities and perform-soil sampling and analysis. <br /> G.R. Kause Construction was responsible for obtaining all necessary permits, removing.residual liquids <br /> Y ' and sludge from the USTs, removing and disposing the tanks,-disposing the contaminated soil, and <br /> backfilling the excavation. <br /> 2.0 MOBILIZATION,EXCAVATION dpi REMOVAL <br /> Excavation and removal of the tanks and associated piping was completed on October 25, 1995. <br /> The excavated soil from-the top of the tanks-was stockpiled on-site. Residual liquids, totaling <br /> approximately 50-gallons,were removed from the tanks by Erickson Environmental using a vacuum truck. <br /> The liquids were transported under hazardous waste mani fest for disposal at an approved disposallrecycle <br /> -facility. Robert McLellon, the inspector for San Joaquin County, was present during excavation and soil <br /> sampling activities. -The tanks wereremo-ved,loaded onto an approved transport vehicle, and transported <br /> along with the associated piping for disposal under-a hazardous waste-manifest.- All-hazardous waste <br /> - -manifests associated-with the tank disposal shall be forwarded,to the Owner and the County by G.R. <br /> Kause Construction. <br /> -Upon completion of tank removal activities, soil which was observed to-have a hydrocarbon odor was <br /> overexcavated and stockpiled. Upon completion of overexcavation activities, soil samples were collected <br /> from the`tank pit and from the soil stockpiles. The sample results indicated that not all of the <br />