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I <br /> 1 <br /> • Quarterly Report - Fourth Quarter 2000 <br />' K& S GAS & GROCERY <br /> 701 East Charter Way, Stockton, California <br /> 1.0. INTRODUCTION <br />' At the request of Mr Khaldoon Othman of K & S Grocery, Advanced GeoEnvironmental, Inc <br /> (AGE)has prepared this quarterly report for the property located at 701 East Charter Way, Stockton, <br /> California The scope of work included quarterly ground water morntonng and preparation of this <br /> I report The site setting is illustrated in Figure 1 Structures and monitoring well locations are <br /> illustrated in Figure 2 <br />' Site background information was summarized in the AGE-prepared Monitoring Well Installation <br /> Report, dated 02 June 1999 <br /> IZ.O. PROCEDURES <br /> All field work was performed in accordance with San Joaquin County Public Health Services - <br /> Environmental Health Division (PIS-EHD) and Central Valley Regional Water Quality Control <br /> Board (CVRWQCB) guidelines for sampling ground water monitoring wells and investigations of <br />' . underground storage tank (UST) sites <br />' 2 1 MONITORING WELL PURGE PROCEDURES <br /> On 19 December 2000, a Solmst water Ievel meter was used to measure the depth to ground water <br /> I in monitoring wells MW1 through MW3, relative to the tops of the well casings (well heads) The <br /> ground water elevations and gradient were determined from these data (Table 1) <br /> After recording water level measurements, disposable polyvinyl chloride (PVC) bailers were used <br /> to purge each well of standing water Approximately 8 to 12 gallons of water(minimum of 3 casing- <br /> water volumes)were removed from each well Groundwater temperature,pH and conductivity were <br /> measured at regular purge-volume intervals during purging using a Hydac water analyzer Field <br /> sheets and data are included in Appendix A Purged water was stored on-site in labeled, 55-gallon <br /> DOT-approved drums <br /> 2 2 COLLECTION OF GROUND WATER SAMPLES <br /> I The depth to ground water was measured in each well following purging to assure a minimum of <br /> p gr g P In g <br /> 80% recharge prior to sampling Water samples were then collected using new disposable plastic <br /> bailers Each water sample was transferred into 40-m1 VOA vials containing 0 5 ml 18% <br /> • hydrochloric acid as a sample preservative The sample vials were then labeled with the monitoring <br /> well designation, date,time of sampling and the sampler's initials The samples were transported in <br /> Advanced GeoEnvironmental,Inc <br />