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I Y1 IQuarterly Report - Third Quarter 2004 MARLOWE PROPERTIES ' 4696 East Waterloo Road (Formerly 4648 East Waterloo Road), Stockton, CA ' 1.0. INTRODUCTION AND SCOPE OF WORK At the request of Mr Jonathan Marlowe,Advanced GeoEnvironmental,Inc (AGE)has prepared the enclosed report of environmental activities conducted at 4696 East Waterloo Road (formerly 4648 East Waterloo Road), Stockton, California The scope of work included quarterly ground water I monitoring and preparation of this report The site and the surrounding area are illustrated on Figure 1 Structures and monitoring well locations are illustrated on Figure 2 A summary of previous investigations at the site was included in the AGE-prepared Confirmation Sod Boring Work Plan, dated 30 May 2000 2.0. PROCEDURES Field work was conducted and this report was prepared in accordance with guidelines issued by the I Central Valley Region of the Regional Water Quality Control Board (CVRWQCB) for subsurface investigation of underground storage tank (UST) sites and guidelines provided by San Joaquin County Environmental Health Department (EHD) for sampling ground water monitoring wells 2 1 WELL MONITORING AND EVACUATION On 27 September 2004,depths to ground water were measured in wells MW-1 through MW-6 from the tops of well casings to the nearest 0 01-foot utilizing a Solinst water level meter Well V W-1 was dry and was not monitored or sampled The ground water elevation in each well was calculated by subtracting the measured depth to ground water from the surveyed casing elevation (Table 1) After water levels were measured, approximately 1 2 to 4 gallons of ground water (a minimum of three water-casing volumes) were removed from wells MW-1, MW-5 and MW-6 utilizing new disposable plastic bailers,approximately 55 to 60 gallons of ground water were removed from wells MW-2, MW-3 and MW-4 utilizing a Grundfos Submersible Pump Temperature, pH and conductivity of purged water were measured for stabilization at regular intervals using an Oakton I water analyzer Field data and logs are included in Appendix A Purged ground water was containenzed in DOT-approved 55-gallon drums and stored on-site in an area lacking general public access 22 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES Water samples were collected from wells MW-1 through MW-6 using new disposable plastic bailers, • after allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each Advanced GeoE nviron menta 1,Inc I