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i <br /> Quarterly Report - First Quarter 2004 <br /> • Proposed EL DORADO APARTMENTS <br /> I2450 South El Dorado Street, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request ofMr Dennis Kim,property owner, Advanced GeoEnvironmental, Inc (AGE) has <br /> ' prepared this quarterly report for the property located at 2450 South El Dorado Street, Stockton, <br /> California(the site) This report documents procedures and results for monitoring and sampling of <br /> three ground water monitoring wells for the first quarter of 2004 The site and the surrounding area <br /> are illustrated in Figure 1 On-site structures and well locations are illustrated on Figure 2 <br /> 2.0. BACKGROUND <br />' The subject property is located on the south-central portion of the City of Stockton, San Joaquin <br /> County, north of the intersection of South El Dorado Street and California Street Land use of the <br /> surrounding properties is recreational(McKinley Park),residential and commercial The subj ect site <br />' is the former location of a glass production facility which was decommissioned sometime during the <br /> early 1970's Detailed back ground information for the site is included as Appendix A <br /> I • <br /> 3.0. PROCEDURES <br />' On 12 January 2004, quarterly ground water monitoring and sampling was performed at the site <br /> Fieldwork was performed in accordance with Central Valley Regional Water Quality Control Board <br />' (CVRWQCB) guidelines for the investigation of underground storage tank(UST) sites <br />' 3 1 QUARTERLY WELL MONITORING PROCEDURES <br /> Quarterly ground water monitoring was performed on monitoring wells MW-1 through MW-3 on <br />' 12 January 2004 <br />' 3 1 1 Well Evacuation and Monitoring <br /> A Solinst water level meter was used to measure the depth to ground water in monitoring wells <br />' MW-1 through MW-3 relative to the tops of the well casings(well heads) After water levels were <br /> gauged, a Watera internal pump was used to evacuate (purge) each well of a minimum of three <br /> casing-water volumes(approximately4 25 to 5 gallons)ofwater Temperature,pH,and conductivity <br />' were measured at regular intervals using an Oakton water analyzer The field data sheets are included <br /> in Appendix B Purged water was stored on site in 55-gallon drums <br />' Advanced GeoEnvironmental,inc <br /> 5 <br />