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�a <br /> GeoStrategies Inc. <br /> SOIL SAMPLING AND SYSTEM STARTUP REPORT <br /> at <br /> Unocal Station No 6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Report No 4855 701-1 <br /> INTRODUCTION <br /> This report summarizes field activities performed by GeoStrategies Inc. (GSI) from July <br /> to September, 1994, during collection of product line trench samples, installation of a <br /> vapor extraction and treatment system (VES), and startup of the VES system Sampling <br />• of soil adjacent to the product dispenser islands was performed at the request of the San <br /> Joaquin County Environmental Health Division (SJCEHD) during a station facility <br /> upgrade The VES installation was originally proposed in RESNA's Work Plan Vapor- <br /> Extraction Well Installation, Report No 38032, dated August 18, 1993 The work <br /> described in this report was performed at Unocal's request <br /> The scope of work described in this report is intended to comply with the State of <br /> California Water Resources Control Board's Leaking Underground Fuel Tanks (LUFT) <br /> Manual, the Regional Water Quality Control Board (RWQCB) Tri-Regional Board Staff" <br /> Recommendations for Preliminary Investigation and Evaluation of Underground Tank Sites, <br /> and SJCEHD guidelines GSI's Field Methods and Procedures are presented in <br /> Appendix A <br /> SITE DESCRIPTION <br /> The subject site is an operating Unocal Service Station situated on the northwest corner of <br /> the intersection of Pacific Avenue and March Lane in Stockton, California, as shown on <br /> the Vicinity Map (Figure 1) The site is bounded to the north and west by asphalt paved <br /> parking lot, to the east Pacific Avenue, and to the south by March Lane Properties in the <br /> general site vicinity are used for commercial purposes Local topography is flat-lying, <br /> with an elevation of approximately 13 feet above mean seal level (MSL) <br />• <br /> 4955701-1 <br /> 6747 Sierra Court, Suite G •Dublin, CA 94568• (510)551-8777• Fax (510) 551-7888 <br /> 3035 Prospect Park Drive, Suite 80• Rancho Cordova, CA 95670 •(916) 631-1314• Fax (916)631-1317 <br />