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1� <br /> FIELD PROCEDURES <br /> f� • <br /> All site activities were conducted under the direct supervision of a Registered Geologist <br /> having five or more years of professional experience in hydrogeology Mike Infurna from <br /> San Joaquin County Environmental Health Division was onsite to inspect the backfilling of <br /> �� the soil borings The conduct of field operations was supervised by a qualified Geologist <br /> designated by the Registered Geologist All field operations were governed by the <br /> requirements of the AEMC Health and Saftey Plan All field personnel were trained in <br /> 40 accordance with 29 CFR 1910 (40-hour OSHA Health and Safety Training) <br /> ANALYTICAL METHODS <br /> 40 The following chemical analyses were performed on selected soil samples <br /> • TotaI Petroleum Hydrocarbons--Diesel Fraction (TPH-D) <br /> (EPA Method M-8015), and <br /> • Volatile Organic Compounds—Benzene, Toluene, Xylene, and Ethylbenzene <br /> (BTXE) (EPA Method 8020) <br /> 40 <br /> Table 1 on page 9 is a summary of the laboratory analyses <br /> LABORATORY RESULTS <br /> 4' Twenty-one soil samples were analyzed for BTXE and TPH-D from six soil borings drilled <br /> at the subject property Three of the soil samples analyzed confirmed that diesel <br /> contaminated soil remains in the ground at the T3 tank site Soil sample B3-B at <br /> of 10 feet bgs shows minor diesel concentrations at 380 ppm Soil samples 134-A at 10 feet bgs <br /> and B4-B at 15 feet bgs show much higher concentrations (1,300 and 8,000 ppm) in the <br /> immediate area of the former fill pipe end of the tank All other soil samples analyzed <br /> 40 show concentrations at or below the laboratory reporting limit for the analyzed <br /> Qh1d,01'M14' Page 8 <br /> AMERICAN <br />