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I <br /> • - GEO-PHASE <br /> - ENVIRONMENTAL <br /> REPORT <br />' Spring Groundwater Monitoring Event <br />' Cutter Lumber Site <br /> 3422 & 3430 S. El Dorado Street <br />' Stockton, California <br />' Project No 102 2 <br /> September 30, 1998 <br /> 1 1.0 INTRODUCTION � <br /> • Groundwater monitoring wells were installed at the site in March of 1998 (see <br />' <br /> Report Groundwater Monitoring Well Installation and Winter 1998 <br /> P g <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 third quarterly round of groundwater sampling completed in <br />' September of this year along with two depth to water measurements completed <br /> at the site in July and August <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, and 3) during which a sample <br /> was 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 <br /> 1 <br />' 2937 Veneman Ave ,#B240 Geo-Prase Environmental Inc Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax(209) 569 0295 <br /> 1 <br />