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1 ? <br /> .% Quarterly Report - First Quarter 2003 <br /> ' MARLOWE PROPERTIES <br /> 4696 East Waterloo Road (Formerly 4648 East Waterloo Road), Stockton, CA <br /> 1.0. INTRODUCTION AND SCOPE OF WORK <br /> ' At the request of Mr Jonathan Marlowe,Advanced GeoEnvironmental,Inc (AGE)has prepared the <br /> enclosed report of environmental activities conducted at 4696 East Waterloo Road (formerly 4648 <br /> East Waterloo Road), Stockton, California The scope of work included quarterly ground water <br />' monitoring and preparation of this report The site and the surrounding area are illustrated in <br /> Figure 1 Structures and monitoring well locations are illustrated on Figure 2 A summary of <br />' previous investigations at the site was included in the AGE-prepared Confirmation Soil Boring Work <br /> Plan, dated 30 May 2000 <br />' 2 0. PROCEDURES <br />' Field work was conducted and this report was prepared in accordance with guidelines issued by the <br /> Central Valley Region of the Regional Water Quality Control Board (CVRWQCB) for subsurface <br /> investigation of underground storage tank (UST) sites and guidelines provided by San Joaquin <br />' County Environmental Health Department (EHD) for sampling ground water monitoring wells <br /> 2 1 WELL MONITORING AND EVACUATION <br /> On 06 March 2003,depths to ground water were measured in wells MW-1 through MW-6 and vapor <br />' extraction well VW-1 from the tops of the well casings to the nearest 0 01-foot utilizing a Solinst <br /> water level meter The ground water elevation in each well was calculated by subtracting the <br /> measured depth to ground water from the surveyed casing elevation (Table 1) <br /> After water levels were measured approximately pp y 6 to 10 gallons of ground water (a minimum of <br /> three water-casing volumes)were removed from wells MW-1, MW-5, MW-6 and VW-1 utilizing <br />' new disposable plastic bailers, wells MW-2, MW-3 and MW-4 were not purged or samples this <br /> quarter Temperature,pH and conductivity ofpurged water were measured for stabilization at regular <br />' intervals using an Oakton water analyzer Field data and logs are included in Appendix A Purged <br /> ground water was containerized in DOT-approved 55-gallon drums and was stored on-site in an area <br /> lacking general public access <br /> 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected from each purged well using new disposable plastic bailers after <br /> allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water <br /> Advanced GeoEnvironrnentai,Inc <br />