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Chevron/South Center 5 <br /> November 1985 <br /> WORK STEPS <br /> The following work steps are proposed: <br /> o Obtain the required permits from local regulatory <br /> agencies for the removal of underground storage tanks, i <br /> the excavation of hydrocarbon-contaminated soils, the <br /> aeration of such soils, and the installation of up to <br /> four groundwater monitoring wells. <br /> ' o Remove the four existing on-site underground storage <br /> tanks aloe with all associated <br /> g piping. New, double- <br /> walled tanks will be installed on site in accordance <br /> with all applicable building codes and regulations. <br /> o if evidence of hydrocarbon-impacted soils is <br /> encountered, excavate the impacted soil in the vicinity <br /> of the underground-storage tanks and/or piping to <br /> 4<s <br /> either the apparent limits of contamination or to the <br /> limits imposed by the site and/or excavation equipment. <br /> o If impacted soils are excavated, such soils will be <br /> i-a stockpiled on site. Any removed soil that shows <br /> s <br /> evidence of waste oil contamination will be kept <br /> c„ separate from soils containing volatile hydrocarbons. <br /> Soils contaminated with volatile hydrocarbons will be <br /> aersted until hydrocarbon levels are below 1 part per <br /> million (ppm) , then used as backfill for the <br /> excavation. If possible, soils contaminated with non- <br /> volatile hydrocarbons will be treated on site and <br /> disposed of in an appropriate manner. <br /> �•l �a GRorRan+ATER <br /> TECHINOLaGY,INC. <br />