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en viros® <br /> Site closure was granted by the Central Valley Regional Water Quality Control board in a <br /> letter dated July 18, 1996 Permit applications for destruction of the ground water <br /> monitoring wells are in progress These wells will be destroyed prior to tank replacement <br /> activities <br /> Scope of Work <br /> The proposed scope of work includes removal of three existing USTs and associated <br /> product piping, and replacement with two double-wall fiberglass USTs and double-wall <br /> fiberglass product piping This work is performed to upgrade the USTs and piping system <br /> to comply with construction standards required by 1998 Locations of the existing and <br /> new tanks are shown on Plate 2 <br /> The work is summarized in the following tasks <br /> Task 1 - Underground Storage Tank Removal <br /> The UST removal project is scheduled to begin November 18, 1996 Permitting for the <br /> tank removal has been completed <br /> The USTs will be uncovered and each tank will be triple rinsed while still in the open tank <br /> pit Twenty pounds of solid carbon dioxide per 1,000 gallons of tank volume will be <br /> added to each tank to render potentially flammable vapors within the tank inert Tank <br /> vapors will be monitored, and when levels drop to acceptable concentrations, the tanks will <br /> be removed from the excavation and loaded onto trucks for removal from the site <br /> Transportation and disposal services will be provided by the following companies <br /> Hazardous Waste Hauler <br /> Crosby and Overton <br /> Ph 1-800-821-0424 <br /> EPA#CAD982524480 <br /> Destination of Tank Rinsate <br /> Romic <br /> Ph 415-324-1638 <br /> EPA#CAD 009452657 <br /> Destination of Tanks <br /> Erickson, Inc <br /> 510-235-1393 <br /> EPA#CAD009466392 <br /> Task 2 - Soil and Ground Water Sampling During Tank Removals <br /> Soil samples will be collected from beneath the USTs per Tri-Regional Guidelines A copy <br /> of these guidelines is included in Appendix A If ground water is encountered in the tank <br /> pit during UST removal activities, one water sample will be collected from the excavation <br /> ., pit for chemical analysis <br /> 96378 2 <br />