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I Quarterly Ground Water Monitoring Report - First Quarter 2002 FORMER CONNELL MOTOR LIFT TRUCK 2211 North Wilson Way Stockton, California I1.0. INTRODUCTION AND BACKGROUND IAt the request of Mr Sheldon Heckman and Mr Richard Calone Esq ,Advanced GeoEnvironmental, 1 Inc (AGE) has performed a quarterly ground water monitoring event at 2211 North Wilson Way, Stockton, California (the site) This report documents procedures and results for the ground water sampling event conducted at the p p gr p site during January 2002 and the analytical results of laboratory analysis of ground water samples The site setting is illustrated on Figure 1 Site structures, soil boring and monitoring well locations are depicted on Figure 2 IThe objective of this investigation was to monitor the vertical and horizontal extent of dissolved petroleum hydrocarbons and solvents on the site This report has been prepared in accordance with guidelines issued by the California Regional Water Quality Control Board-Central Valley Division I (RWQCB) for subsurface investigations I i A summary of previous investigations of the site was included in Additional Sate Assessment,dated 18 May 2001, prepared by AGE The procedures for the site investigation were outlined in Addataonal Site Assessment Work Plan, dated 19 May 2000,prepared by AGE, and approved by the IRWQCB by letter dated 13 November 2000 I2.0. QUARTERLY GROUND WATER MONITORING AND SAMPLING On 24 January 2002, ground water monitoring and sampling were performed at each well, ground Iwater elevation, flow direction and gradient were determined from the field data f2 1 WELL MONITORING AND EVACUATION Depths to ground water were measured in each well from the tops of the well casings at the site to the nearest 0 01-foot utilizing a Solinst water level meter The ground water elevation in each well at the site was calculated by subtracting the measured depth to ground water from the surveyed casing elevation(Table 1) Ground water elevations at the shallow wells MW-I through MW-5 were plotted and contoured on a scaled site map (Figure 3) After water levels were measured, six gallons of ground water (a minimum of three casing-water volumes per well) were removed from shallow wells MW-1 through MW-5 utilizing dedicated disposable bailers,26 gallons of ground water were removed from wells MW-6 and MW-7 utilizing Advanced GeoEnvironmental,Inc