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- GEO-PHASE <br /> - ENVIRONMENTAL <br />' REPORT <br />' Quarterly Groundwater Monitoring Event <br /> First Quarter 2004 <br /> tCutter Lumber /Western Lift Site <br /> 3930 S. El Dorado Street <br /> Stockton, California <br /> CWRCB GID Code T0607700498 <br />' GPE Project No 1022 <br /> May 5, 2004 <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 1998 <br />' Groundwater Moattorang, 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 301h quarterly round of groundwater sampling completed on <br />' March 16th, 2004 <br /> 1.1 Site History <br />' release was discovered as a result of a groundwater monitoring <br /> This gasoline re eas � g <br /> event at the Western Lift Site in the southerly part of the subject Property (as <br /> shown in Figures 1, 2) during which a sample was collected from an on-site <br /> domestic well After a review of historic records, a former 1,000-gallon <br />' underground gasoline tank and an above ground diesel tank were identified <br /> along the western Property margin in the north central portion of the site <br /> Subsequent soil borings confirmed that the release had impacted the vadose <br />' zone soil and the groundwater In March of 1998, seven groundwater monitoring <br /> wells were installed to monitor the groundwater plume Two wells, MW-1 and <br /> MW-4 still remain from the initial Western Lift investigation near the south end <br /> 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 />