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Monitoring Well Installation and Quarterly Monitoring Report <br /> Former BLUE STAR GASOLINE <br /> 4040 East Main Street, Stockton, California <br /> 1.4. INTRODUCTION <br /> At the request of Mr Khalid Anber, Advanced GeoEnvironmental, Inc (AGE) has prepared this <br /> ' monitoring well installation and quarterly report for the property located at 4040 East Main Street, <br /> Stockton, California (site) The site and surrounding area are illustrated on Figure 1 Soil bonngs, <br /> ' former underground storage tanks(USTs),and monitoring well locations are illustrated on Figure 2 <br /> Site background information is summarized in Appendix A <br /> ' 2.0. PROCEDURES <br /> ' Field work was performed in accordance with guidelines issued by the Central Valley Regional <br /> Water Quality Control Board(CVRWQCB)for the investigation of underground storage tank(UST) <br /> sites and by the San Joaquin County Environmental Health Department(EHD) for the sampling of <br /> ' ground water monitoring wells The scope of work was outlined in the AGE-prepared Revised <br /> Monitoring Well Installation Work Plan, dated 19 March 2004 <br /> ' • 2 1 MONITORING WELL INSTALLATION, DEVELOPMENT, AND SURVEY <br /> I <br /> ' On 02 and 03 May 2005,three ground water monitoring wells(MW-1 through MW-3)were installed <br /> at the site The wells were developed on 06 May 2005, sampled on 17 May 2005, and surveyed on <br /> 07 June 2005 <br /> ' 2 1 1 Drilling and Sampling <br /> On 02 and 03 May 2005, a CME-75HT truck-mounted drill rig was utilized to advance pilot soil <br /> boring MW-1 to 85 feet below surface grade (bsg) and borings MW-2 and MW-3 to 80 feet bsg <br /> ' using 8 25-inch diameter hollow-stem augers The drill rig and three-man crew were supplied by <br /> Cascade Drilling, Inc of Rancho Cordova, California Auger returns generated by drilling were <br /> ' stored on-site on plastic sheeting pending proper disposal <br /> Soil samples from boring MW-1 were continuously cored, with samples collected by hand into <br /> 6-inch brass sleeves at approximately 5-foot intervals beginning at 5 feet bsg After sample <br /> t collection, both ends of the brass sleeve were covered with Teflon sheets, capped, and sealed with <br /> tape <br /> ' Soil samples from borings MW-2 and MW-3 were collected ahead of the drill bit using a California <br /> • modified, l 8-inch split-spoon sampler loaded with three pre-cleaned,2-inch by 6-inch brass sleeves <br /> ' Advanced GeoEnvironmental,Inc <br /> 1 <br />