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1 <br /> 1 _• GEO-PHASE <br /> 1 - ENVIRONMENTAL <br /> 1 REPORT <br />' Quarterly Groundwater Monitoring Event <br /> Summer 2002 <br /> 1 Cutter Lumber Site <br /> 3930 S. El Dorado Street <br />' Stockton, California <br /> Project No 102 2 <br /> November 12, 2002 <br /> 1 <br /> 1.0 INTRODUCTION <br /> Groundwater monitoring wells were installed at the site in March of 1998 (see <br /> Report Groundwater Mon-itoring Well Installation and Winter 1998 <br />' Groundwater Monitoring, Cutter Lumher 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 theu <br /> s bject gasolene 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 domestiLc 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 /> • <br />' 2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax(209)569-0295 <br /> I <br />