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L %W .,01 <br /> L UST REMOVAL REPORT <br /> Ad-Art Sign Corp. <br /> i. <br /> 3133 North Ad Art Road, Stockton, California <br /> 6. 1.0. INTRODUCTION AND SCOPE OF WORK <br /> In accordance with the request of Mr. Paul Bischofberger of Ad-Art Sign Corp., Advanced <br /> GeoEnvironmental, Inc. (AGE)has prepared this report for the removal of two underground storage <br /> tanks (USTs) from 3133 North Ad Art Road, Stockton, California. Soil samples were collected <br /> beneath the USTs and product piping. The site location is illustrated on Figure 1 -Location Map. <br /> Structures, former UST and sample locations are illustrated on Figure 2 -Site Plan. <br /> L 2.0. BACKGROUND <br /> The site is located in a commercial area of low topographic relief in Stockton,California,at the south <br /> end of Ad Art Road, south of Cherokee Road and east of Highway 99. It is the understanding of <br /> AGE that one 10,000-gallon gasoline, one diesel and one waste oil UST were installed at the site <br /> ` circa 1965. The gasoline UST was removed on 22 February 1989. Site closure was subsequently <br /> granted for the gasoline UST and dispenser locations. <br /> ` Ground water currently occurs at a depth of approximately 55 feet below surface grade (bsg) with <br /> a northeasterly flow direction in monitoring wells located approximately 1,000 feet northwest of the <br /> subject property. <br /> L <br /> 3.0. PROCEDURES <br /> L <br /> Field work was performed in accordance with Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) and San Joaquin County Public Health Services - Environmental Health Division <br /> (PHS-EHD) guidelines for the investigation of UST sites. <br /> L <br /> 3.1. UST REMOVALS <br /> L The UST removals were performed on 25 September 1998. Permits were obtained from the PHS- <br /> EHD and the City of Stockton Fire Prevention Division(Appendix A). The USTs were uncovered <br /> using a backhoe. Overburden soil was moved to the eastern portion of the site and stockpiled. Both <br /> L USTs and their connecting piping were triple rinsed with a steam cleaner. The rinsate was removed <br /> from the USTs by Nor Cal Oil, using a vacuum truck and was hauled to Industrial Service Oil <br /> Company in Los Angeles, California for disposal/recycling. Approximately 175 pounds of dry ice <br /> was added to the USTs(minimum of 30 pounds per 1,000 gallon capacity). The percent oxygen and <br /> lower explosive limit(LEL)were measured in each UST prior to removal.All USTs were examined <br /> L <br /> Advanced GmEnvironmental,Inc. <br /> V <br />