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T' `/ <br /> ATC SITE SAFETY PLAN <br /> FACHXff BACKGROUND <br /> In December 1989, one 500-gallon unleaded gasoline underground storage tank (UST) and <br /> all associated piping and dispensing equipment was removed and disposed of. Laboratory <br /> amalysis of a sod sample collected from beneath the former UST location indicated the <br /> presence of detectable concentrations total petroleum hydrocarbons. After the tank was <br /> removed,the area of the former tank was backfilled. <br /> On August 19, 1991, three soil borings ranging in depth from 20 to 50 feet bgs were <br /> advanced. Soil samples were submitted for analysis and samples from one boring, B-1, <br /> contained detectable concentrations of TPHg and BTEX. The samples from borings B-2 <br /> and B-3 did not contain detectable concentrations of petroleum hydrocarbons. <br /> WORKMAN <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 /> 85 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 three samples from the boring, based on field observations <br /> (Le. 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), TPHg (EPA Method 8015 Modified), and oxygenate fuel additives <br /> (EPA Method 8260). <br /> Task Two: <br /> Supervise the completion of the soil boring into a groundwater monitoring well to a <br /> depth of approximately 85 feet. One groundwater sample will be collected from the <br /> well after its development. Samples will be analyzed for BTEX, TPHg, and <br /> oxygenate fuel additives. <br /> PAGE <br />