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i <br /> ATC SITE SAFETY PLAN <br /> FACRM BACKGROUND <br /> In February 1987, one 3,000-gallon unleaded gasoline underground storage tanks (USTs) <br /> and all associated piping and dispensing equipment was removed and disposed of. <br /> Laboratory analysis of a soil sample collected from beneath the former UST location <br /> indicated the presence of detectable concentrations total petroleum hydrocarbons. After <br /> the tank was removed, the area of the former tank was backfilled and resurfaced. <br /> On July 23, 1997, an ATC geologist supervised the advancement of five soil borings ranging <br /> in depth from 6 to 46 feet bgs. The soil borings were advanced using a truck mounted <br /> Geoprobe® narrow diameter rig employing direct push technology. Soil samples were <br /> submitted for analysis and contained detectable concentrations of petroleum hydrocarbons. <br /> WORK PLAN <br /> Task One: <br /> One soil boring will be advanced in the location of the former tank pit. The soil <br /> boring will be advanced employing hollow stem auger to a depth of approximately <br /> 60 feet bgs. A field geologist will be present to log all soil samples. Each soil sample <br /> will be field screened with a Photoionization Detection (PID) meter or similar <br /> instrument and at least two samples from the boring, based on field observations <br /> (i.e. odor, discoloration, PID readings), will be placed in a cooler with ice and <br /> submitted for laboratory analysis. Samples will be analyzed for BTEX (EPA <br /> Method 8020), oxygenate fuel additives (EPA Method 8260), TPHg, TPHd, and <br /> TPHk (EPA Method 8015 Modified). <br /> Task Two: <br /> Supervise the installation of one groundwater monitoring well to a depth of <br /> approximately 60 feet. One groundwater sample will be collected from the well after <br /> its development. Samples will be analyzed for BTEX, oxygenate fuel additives, <br /> TPHg, TPHd, and TPHL <br /> PAGE 4 <br />