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' 0 Quarterly Report - Third Quarter 2002 CHARLIE'S DAY AND NITE ' 706 North El Dorado Street, Stockton, California ' 1.0. INTRODUCTION At the request of Mr Charles Skobrak of Charlie's Day and Nite,Advanced GeoExvironmental,Inc ' (AGE) has prepared this quarterly report for the property located at 706 North El Dorado Street, Stockton,California Quarterly ground water monitoring was conducted on 08 August 2002 The site ' location and the surrounding area are Illustrated in Figure 1 Structures as well as boring and monitoring well locations are illustrated on Figure 2 Site background Information is provided in Appendix A 2.0. PROCEDURES ' Field work was performed In accordance with guidelines established by the California Regional Water Quality Control Board-Central ValleyDivision for investigation of underground storage tank ' (UST)sites Ground water monitoring procedures were performed as outlined in the AGE-prepared Monitoring Well Installation Work Plan dated 29 July 1999,as approved by the San Joaquin County Environmental Health Department (EHD)by letter dated 03 August 1999 2 1 WELL MONITORING AND EVACUATION On 08 August 2002, a Solinst water level meter was used to measure the depth to ground water in 1� p ' the three wells (MW 1 through MW5) relative to the tops of the well casings The relative ground water elevations and gradient were determined from these data (Table 1) ' After the depth-to-ground water measurements were collected,the monitoring wells were purged of standing water using a new plastic bailer Approximately 5 to 5 5 gallons of water, a minimum of 3 casing-water volumes, were removed from the monitoring wells Ground water temperature, pH ' and conductivity were measured at approximately I-gallon intervals during purging using an Oakton water analyzer Field sheets and data are Included in Appendix B Purged water was stored on site In labeled, 55-gallon DOT-approved drums 22 COLLECTION OF GROUND WATER SAMPLES A water sample was collected from each monitoring well using a new disposable bailer after allowing the well to achieve a minimum 80%recovery of the pre-purge water volume Each water lie sample was transferred Into two 40-m1 VOA vials containing 0 5 ml 18% hydrochloric acid as a sample preservative and one 500-m1 poly bottle without preservative After collection, the samples were properly labeled, placed in a chilled container and transported under chain-of-custody to ' Advanced GeoEnvironmental,Inc y