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I. Quarterly Report - First Quarter 2003 K & S GAS & GROCERY 701 East Charter Way, Stockton, California I1.0. INTRODUCTION At the request of Mr Khaldoon Othman of K & S Grocery, Advanced Geo Environmental, Inc (AGE)has prepared this quarterly report for the property located at 701 East Charter Way,Stockton, California The scope of work included a quarterly ground water monitoring event and preparation I of this report The site setting is illustrated in Figure 1 Structures and monitoring well locations are illustrated III Figure 2 Site background Information is summarized in Appendix A Data from previous ground water monitoring events are summarized in the tables of this report I 2.0. PROCEDURES ' Field work was performed in accordance with guidelines established by the Central Valley Regional Water Quality Control Board for investigation of underground storage tank (UST) sites . 21 WELL MONITORING AND EVACUATION ' On 09 January 2003, a Sol nst water level meter was used to measure the depth to ground water in monitoring wells MW1 through MW3 relative to the tops of the well casings (well heads) The ' ground water elevations and gradient were determined from these data and are shown III Table 1 After recording water level measurements,disposable polyethylene bailers were used to evacuate the ' wells of standing water A minimum of 3 casing-water volumes were removed from each well, 10 gallons from MW1 and 6 gallons each from MW2 and MW3 Ground water temperature, pH and ' conductivity were measured at regular purge-volume Intervals during the evacuation of MWI, MW2 and MW3 using an Oakton water analyzer Field sheets and data are included in Appendix B Evacuated water was stored on-site In properly labeled, 55-gallon Department of Transportation ' (DOT)-approved drums ' 2 2 COLLECTION OF GROUND WATER SAMPLES The depth to ground water was measured in each well following evacuation to assure a minimum of ' 80% recharge prior to sampling Water samples were then collected using new disposable plastic bailers Each water sample was transferred into laboratory-supplied 40-m1 VOA vials containing 0 5 ml 18%hydrochloric acid as a sample preservative The sample vials were then labeled with the ' monitoring well designation, date, time of sampling and the sampler's Initials The samples were • transported in a chilled container under chain-of-custody to Cal Tech Environmental Laboratories ' Advanced GeoEnvironmental,Inc 1