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r <br /> Quarterly Report - Second Quarter 2005 <br /> • QUICK N SAVE #1 <br />' 1901 South El Dorado Street, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr Zeb Khan, Advanced GeoEnvironmental, Inc (AGE) has prepared this <br /> Nquarterly report for the property located at 1901 South El Dorado Street, Stockton, California(site) <br /> The site and the surrounding area are illustrated on Figure 1, Structures, boring and well locations <br /> are illustrated on Figure 2 Site background information is summarized in Appendix A Ground <br /> water analytical data from the current and previous investigations can be found in Tables 1 and 2 <br /> r2.0. PROCEDURES <br />' On 17 May 2005, ground water monitoring wells MW-1 through MW-4 were monitored and <br /> sampled Field work was performed in accordance with guidelines issued by the Central Valley <br /> Regional Water Quality Control Board(CVRWQCB) for the investigation of underground storage <br /> tank (UST) sites <br />' . 2 1 WELL MONITORING AND EVACUATION <br /> The depth to ground water in each monitoring well was measured from the top of the well casing to <br />' the nearest 0 01-foot utilizing a Solinst water level meter Groundwater elevation in each well was <br /> calculated by subtracting the measured depth to ground water from the surveyed casing elevation <br /> (Table 1) <br />' After water levels were measured between 8 and 13 5 gallons of water a minimum of 3 casing- <br /> water <br /> - <br /> g ( g <br /> water volumes per well)were purged from monitoring wells MW-1 through MW-4 using a Watera- <br />' Hydro-Lift II pump equipped with a mechanical arm utilized to surge each well with a dedicated <br /> polyethylene hose Ground water temperature, pH and conductivity were measured at regular <br />' intervals during purging using an Oakton water analyzer Field sheets and data are included in <br /> Appendix B Purged water was stored on-site in properly labeled, 55-gallon Department of <br /> Transportation (DOT)-approved drums <br /> 1 <br /> 22 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br />' After allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume, water <br /> samples were collected from each purged well utilizing 518-inch outer diameter, length-discrete <br />' polyethylene hose equipped with a ball-valve water tip and Watera-Hydro-Lift 11 pump Each water <br /> sample was transferred into laboratory-supplied 40-m1 volatile organic analysis (VOA) vials <br /> • containing 0 5 ml of hydrochloric acid as preservative After collection,the samples were properly <br /> Advanced GcoEnvlranmental,Inc <br />