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.5 .c <br /> ATC SITE SAFETY PLAN <br /> FACILITY BACKGROUND <br /> In December 1996, two 10,000-gallon diesel gasoline underground storage tanks (USTs), <br /> one 12,000-gallon diesel UST, and all associated piping and dispensing equipment were <br /> removed and disposed of. Laboratory analysis of a soil samples collected from beneath the <br /> former USTs and pipeline indicated the presence of detectable concentrations total <br /> petroleum hydrocarbons. After the tanks were removed, the area of the former USTs was <br /> backfilled. <br /> In January 1997, one 8,000-gallon leaded gasoline UST and one 12,000-gallon unleaded <br /> gasoline UST, and all associated piping and dispensing equipment were removed and <br /> disposed of. Laboratory analysis of a soil samples collected from beneath the former USTs <br /> indicated the presence of detectable concentrations total petroleum hydrocarbons. After <br /> the tanks were removed, the area of the former USTs was backfilled. <br /> WORK PLAN <br /> Task One: <br /> Three soil borings will be advanced at the location of the former diesel USTs, two <br /> soil borings will be advanced in the location of the former diesel UST pipeline, and <br /> four soil borings will be advanced at the location of the former gasoline USTs. The <br /> soil borings will be advanced employing hollow stem auger and direct push <br /> technology to depths ranging from 15 to 35 feet bgs. A field geologist will be present <br /> to log all soil samples. Each soil sample will be field screened with a Photoionization <br /> Detection (PID) meter or similar instrument and at least three samples from the <br /> boring, based on field observations (i.e. odor, discoloration, PID readings), will be <br /> placed in a cooler with ice and submitted for laboratory analysis. <br /> Samples from the former diesel UST and diesel UST pipeline locations will be <br /> analyzed for BTEX (EPA Method 8020), and TPHd (EPA Method 8015 Modified). <br /> Samples from the former gasoline UST location will be analyzed for BTEX, TPHd, <br /> and oxygenate fuel additives (EPA Method 8260). <br /> PAGE <br />