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1Quarterly Report - First Quarter 2002 GC FRANKLYN COLE PROPERTY ' 7505 West Linne Road, Tracy, California MAR 0 4 20OZ ENVIRMNAIENT HEALTH ' 1.0. INTRODUCTION AND SCOPE OF WORK PERMIT/SERVICES At the request of Mr. Franklyn Cole, Advanced GeoEnvironmental, Inc. (AGE) has prepared this ' report for 7505 West Linne Road,Tracy,California(the site).This report documents procedures and results for a quarterly ground water monitoring event conducted during the first quarter 2002. The location and vicinity of the site are illustrated on Figure 1. The locations of on-site structures, borings, wells and the former UST and dispenser are depicted on Figure 2. ' This report has been prepared in accordance with the Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites. Background information and a summary of prior investigations at the site are Included in the AGE-prepared document titled Work Plan -April 1999, dated 23 April 1999. Quarterly monitoring data from August 1999 to the present is summarized in Tables 1 and 3 of this report. 2.0. PROCEDURES ' . Monitoring wells MW-1 through MW-6 were monitored and sampled on 30 January 2002. Field work was performed in accordance with the AGE-prepared document, Work Plan for Additional Well Installation -December 2000, dated 20 December 2000. The work plan was approved by the ' San Joaquin County Public Health Services-Environmental Health Division(PHS-EHD)by letter dated 02 January 2001. 2.L WELL MONITORING AND EVACUATION ' Depths to ground water were measured in each well from the tops of the well casings to the nearest 0.01-foot utilizing a Solinst water level meter. Ground water elevation in each well at the site was calculated by subtracting the measured depths to ground water from the surveyed casing elevations ' (Table 1). Ground water elevations were plotted and contoured on a scaled site map (Figure 3). ' After water levels were measured,approximately 4 to 6 gallons of ground water(a minimum of three casing-water volumes per well)were removed from wells MW-1,MW-2,MW-3,MW-5 and MW-6 and approximately 12 gallons of ground water were removed from well MW-4 before the well was ' __.., dry,_utilizing a =new disposable, dedicated polyethylene bailer at each well. Temperature, pH and _ conductivity were measured for stabilization at regular purge-volume intervals from each well using an Oakton water analyzer. Field data and logs are in Appendix A. Purged ground water was ' containerized in DOT-approved model 17H 55-gallon drums and stored at the site. Advanced GcoEnviron mental,Inc.