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SMTH SITE SAFETY PLAN <br /> I <br /> i <br /> ' FACILITY BACKGROUND <br /> Two underground tanks (10,000 gallon diesel and 1,000 gallon gasoline) and associated <br /> ' dispensers and piping were removed in 1990. Twenty-eight soil borings (B-1 through B-28) <br /> have been drilled at the site, and 6 groundwater monitoring wells (MW-1 through MW-6) <br /> and 8 vapor extraction wells (VEW-1 through VEW-8) have been installed in the borings. <br /> ' Depth to groundwater ranges from about 67 to 71 feet below ground surface (bgs). <br /> Groundwater flow direction is generally toward the northeast. Both soil and groundwater <br /> ' exceed regulatory limits in selected areas. A soil vapor extraction system consisting of a <br /> thermal oxidizer, and three vapor extraction wells is currently in operation. <br /> WORK PLAN <br /> t Task One: SMTH will supervise the advancement of three soil borings in the vicinity the <br /> former underground storage tank. Soil samples will be collected every five <br /> feet and screened with a flame ionization detector. Subsequent to sample <br /> collection, the borings will be grouted to the surface with a neat cement <br /> grout. Any soil cuttings generated during sampling activities will be <br /> stockpiled on site pending analytical results of soil samples. <br /> 1 <br /> 1 <br /> PAGE 2 <br /> 1 <br />