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F <br /> ///7APEX <br /> E N V I R O T E C N 7844 Madison Avenue Suite 106 • Fair Oaks,CA 95628 <br /> 1 800 242 5249 • Ph 916 535 0200 • Fax 916 535 0207 <br /> March 3, 1998 <br /> Ms Lynn Swanson <br /> Colberg Boat Works <br /> P O Box 1288 <br /> Stockton, California 95201 <br /> Subject First Quarter 1998 Groundwater Monitoring Report <br /> Colberg Boat Works <br /> 858 West Fremont Street (401 North Stockton Street) <br /> Stockton, California — <br /> Apex Project No COLO 1 001 <br /> c <br /> Dear Ms Swanson <br /> Apex Envirotech, Inc (Apex), is pleased to provide you with this report documenting the results <br /> of the groundwater monitoring conducted at the subject site (Figure 1) on January 22, 1998 <br /> This report is based, in part, on information obtained by Apex from Colberg Boat Works, and is <br /> subject to modification as newly acquired information may warrant <br /> SITE DESCRIPTION <br /> The subject site is located in the western portion of Stockton, San Joaquin County, California, at <br /> an elevation of approximately 10 feet above mean sea level The site contains several marine <br /> service warehouse/storage buildings on approximately three acres of land and is located in an <br /> industrial area of Stockton, California (Figure 1) The site is nearly level and is bordered by the <br /> Stockton Deep Water Channel to the south The site is a former ship yard vVhich is no longer <br /> active, with the exception of limited boat storage (Figure 2) <br /> BACKGROUND <br /> On Ma_v 16, 1986, Jim Thorpe Oil, Inc removed two 550-gallon diesel, one 8,000-gallon diesel, <br /> and one 1,000-gallon gasoline underground storage tanks (USTs) from the site The area around <br /> the former gasoline UST was o\,er-excavated in 1988 <br /> In Februarti 1993, Telic Engineering Corporation (TEC) of Stockton California performed a <br /> Phase I investigation of the subject site and surrounding area v,ithin a one-mile radius TEC's <br />