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1 <br /> GEOTHASE <br /> - ENVIRONMENTAL <br /> REPORT <br />' Quarterly Groundwater Monitoring Event <br /> Winter 2002 <br />' Cutter Lumber Site <br />' 3930 S. El Dorado Street <br /> Stockton, California <br />' Project No 102 2 <br /> February 25, 2002 <br /> 1.0 INTRODUCTION <br /> Groundwater monitoring wells were installed at the site in March of 1998 (see <br /> Report Groundwater Monitoring Well Installation and Winter .7998 <br /> Groundwater Monitoring, Cutter Lumber Site, dated April 24, 1998) The initial <br /> round of groundwater sampling was also completed at that time This report <br />' documents the sixteenth quarterly round of groundwater sampling completed on <br /> September 12th, 2002 <br />' 1.1 Site History <br /> The site of the subject gasoline release was discovered as a result of a <br />' groundwater monitoring event at the Western Lift Site in the southerly part of <br /> the subject Property (as shown in Figures 1, 2) during which a sample was <br />' collected from an on-site domestic well After a review of historic records, a <br /> former 1,000-gallon underground gasoline tank and an above ground diesel tank <br /> were identified along the western Property margin in the north central portion <br />' of the site Subsequent soil borings confirmed that the release had impacted the <br /> vadose zone soil and the groundwater In March of 1998, seven groundwater <br /> monitoring wells were installed to monitor the groundwater plume Two wells, <br />' MW-1 and MW-4 still remain from the initial Western Lift investigation near <br /> the south end of the Property <br />' 2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax (209) 569-0295 <br /> 1 <br />