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' Quarterly Report - Fourth Quarter 2004 QUICK N SAVE 92 ' 2057 South El Dorado Street, Stockton, California ' 1.0. INTRODUCTION At the request of Mr Charan Dhillon,Advanced GeoEnvironmental, Inc (AGE)has prepared this quarterly report for the property located at 2057 South El Dorado Street, Stockton, California(site) The site and the surrounding area are Illustrated on Figure 1 Structures,borings,and monitoring well locations are illustrated on Figure 2 Site background information Is summarized in Appendix A 2.0. PROCEDURES On 17 November 2004, three ground water monitoring wells (MW-1, MW-2, and MW-3) were ' monitored and sampled Field work was performed in accordance with guidelines issued by the Central Valley Regional Water Quality Control Board (CVRWQCB) for the investigation of underground storage tank (UST) sites and by the San Joaquin County Environmental Health ' Department (EHD) for the sampling of ground water monitoring wells 2 1 WELL MONITORING AND EVACUATION The depth to ground water in each monitoring well was measured from the top of the well casing to ' the nearest 0 01-foot utilizing a Solinst water level meter Ground water elevation In each well was calculated by subtracting the measured depth to ground water from the surveyed casing elevation After water levels were measured, approximately 4 5 gallons of water(a minimum of three casing- water volumes per well)were purged from monitoring wells MW-1 through MW-3 using a Waterra Hydro-Lift II inertia pump and dedicated tubing Ground water temperature, pH, and conductivity were measured at regular intervals during purging using an Oakton water analyzer Field sheets and data are Included in Appendix B Purged water was stored on-site in properly labeled, Department ' of Transportation (DOT)-approved 55-gallon drums 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES Water samples were collected from each purged well utilizing the Waters Hydro-Lift lI inertia pump ' and dedicated tubing after allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water sample was transferred into laboratory-supplied,40-milliliter(ml)volatile organic analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid as preservative After ' collection, the samples were properly labeled, placed in a chilled container, and transported under chain of custody to Cal Tech Environmental Laboratories(CTEL),a California Department of Health . Services (DHS)-certified analytical laboratory, for analysis The samples were analyzed for Advanced GeoEnvironmental,Inc I