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i <br /> I <br /> A TC Assocl Ates SITE SAFETY PLAN <br /> FACILITY BACKGROUND <br /> In March 1990, one 1,000-gallon underground storage tank(UST) and all associated piping <br /> and dispensing equipment were removed and transported off-site. Laboratory analysis -of <br /> soil samples collected from beneath the former 1,000-gallon UST location indicated the <br /> presence of detectable concentrations of ethylbenzene and xylenes. After the tank was <br /> removed, the area of the former tank was backfilled. In January 1998, one soil boring was <br /> advanced to approximately 42 feet bgs. Soil samples and a grab groundwater sample were <br /> collected. The samples contained detectable concentrations of petroleum and chlorinated <br /> hydrocarbons. <br /> WORKPLAN <br /> Task One: <br /> Supervise the excavation of approximately 72 cubic yards of impacted soil. <br /> Immediately transport and dispose of the soil at Forward Landfill. Collect <br /> confirmation soil samples from excavation and soil profile samples from soil going to <br /> i <br /> Forward Landfill <br /> Task Two: <br /> Supervise the advancement of two soil.borings to 57 feet bgs and one soil boring .to <br /> 70 feet bgs. Supervise the installation,of three groundwater monitoring wells to a <br /> depth of approximately 57 feet and possibly a fourth well to a depth of <br /> approximately 70 feet. At least two soil samples will be collected and one <br /> groundwater sample will be collected from each well after well development. <br /> Samples will be analyzed for TPHg, TPHss, and TPHd (EPA Method 8015 <br /> Modified), halogenated and aromatic 'organic compounds (HVOCs, EPA Method <br /> 801018020), and oxygenate fuel additives (EPA Method 8260). <br /> PAGE 4 <br />