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The Flood Budding <br /> 870 Market Street,Sade 712 <br /> - - San Francisco,CA 94102 <br /> E <br /> (415)986-3336 <br /> 1 Fax (415 986 3370 <br /> . 1 <br /> ' ici@iavahenanconsuiting cam <br /> ' MEMORANDUM <br /> To Doug Oram,Ph D <br /> ETIC Engineering, Inc <br /> ' From Mehrdad M Javaherian, Ph D , P Hg, P E ,DABT <br /> Javaherian Consulting, Inc <br /> ' Re Risk-Based Corrective Action Analysis <br /> Exxon Retail Site 7-0137 <br /> ' 1605 South El Dorado Street <br /> Stockton, CA <br /> Date: November 10, 2000 <br /> This memorandum documents a nsk-based corrective action(RBCA) analysts for the above referenced site <br /> ' (see Figure 1), focusing on protection of human health at and in the vicinity of the site Tins analysis is <br /> based on RBCA guidelines for petroleum release sites set fortis by the American Society for Testing and <br /> Materials(ASTM E-1739-95), and is consistent with California Environmental Protection Agency(EPA) <br /> ' Department of Toxic Substances Control([DT SC], 1999)and US EPA([USEPA],199 1)risk assessment <br /> guidelines This RBCA analysis is based on available historical data collected at the site, including the I' <br /> Quarter 2000 groundwater monitoring event Moreover,this RBCA analysis focuses on future <br /> ' commercial/industrial land use at the site, and may be used in support of closure requirements for the site <br /> 1.0 BACKGROUND <br /> Exxon Retail Site 7-0137 is located at 1603 South El Dorado Street, Stockton, California (see Figure 1) <br /> The site is located in southern Stockton, approximately 0 6 miles northeast of Interstate 1-5 and lies at an <br /> elevation of approximately 16 feet(ft) above mean sea level (MSL) The site is located between South El <br /> Dorado Street to the east, Center Street to the west, Second Street to the north, and is bounded by Bugsy <br /> Bath Car Wash to the south <br /> The site is currently an active service station/EZ Mini-Mart, with one 20,000-gallon double-walled <br /> fiberglass underground storage tank(UST) divided into two compartments that have 60 and 40 percent of <br /> the total volume capacity The site was initially a Regal service station with USTs in 1954 It was <br /> i purchased by Exxon in July 1988, with the existing building, canopy, pump islands, and three 10,000 <br /> gallon USTs The single-walled steel USTs contained regular leaded, regular unleaded, and premium <br /> unleaded fuels The service station was inactive between 1990 and 1992 <br /> ' Risk Assessment & Toxicology - Environmental Modeling <br /> Water Resource Development & Management <br /> www javaherianconsulting corn <br />