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- �`s ' <br /> INTRODUCTION <br /> ENVIRONMENTAL HEALTH <br /> PERMIT.;SERVICES ; <br /> us report describes the removal of one (1) underground storage tank from the M & M Builders <br /> pply property located at 811 E. 11th Avenue in Tracy, California. The tank had a one <br />)usand (1000) gallon capacity and was constructed of steel. The tank previously contained <br /> ded gasoline and had been out of service for approximately ten (10) years. <br /> UNDERGROUND STORAGE TANK REMOVAL <br /> tank was removed from the site on June 23, 1994 and transported for disposal to Erickson, <br /> by Dillard Environmental Services (DES). Soil samples were collected from the excavation <br /> owing the removal of the tank. William R. Snavely of the San Joaquin Environmental Health <br />,ision (SJEHD) was on site to observe the tank removal and soil sampling. The tank <br /> avation had a total depth of twelve (12) feet below ground surface. Upon removal and <br />)ection, the tank exterior appeared to be in good condition and no holes or leaks were noted. <br /> soil at the site is predominantly dark brown, clayey, sandy, silt. a minimal petroleum odor <br /> soil staining was noted during the excavation. Groundwater was encountered in the tank <br /> ivation at approximately ten (10) feet from ground surface. The excavated soil ( approx. 40 <br />'.c yards), was placed on visqueen sheeting and covered for temporary storage pending <br /> ratory results. The excavation was left open and surrounded with barricades. <br /> Soil Samples <br /> (2) soil samples were collected beneath the former tank location in the sidewalls of the <br /> vation at a depth of approximately 10 feet. The samples were collected by driving a clean <br />; sleeve into freshly exposed soil brought to the surface in a backhoe bucket. One (1) water <br />)le was collected from the water which filled the excavation following the removal. Two <br /> additional samples were collected from the stockpiled soil. The stockpile samples were <br /> cted from four random locations within the stockpile at depths of approximately 12 to re } <br />;s18 <br /> . The four samples points were composite into two samples for analysis. ! <br /> soil sample was sealed with aluminum foil, capped, wrapped with duct tape, labeled, and <br /> d in a cooler with ice for storage. The water sample was collected in an amber liter bottle <br /> lace in the cooler for storage. The samples were hand delivered, the same day, under chain- <br /> stody procedures to Argon Mobile Labs, in Ceres, California. <br /> Laboratory Analyses <br /> oil and water samples were analyzed for benzene, toluene, ethylbenzene, and total xylene <br /> 87 by method 8020, for total petroleum hydrocarbons, quantified as gasoline (TPH-G) by <br />,d 5030/LUFT, and for total lead by method 6010. <br />