Laserfiche WebLink
I <br /> Quarterly Report <br /> 1April 1997 <br /> CALIFORNIA FUELS CARDLOCK STATION <br /> 2402 Pacific Avenue <br />' Stockton, California <br />' 1.0. INTRODUCTION AND SCOPE OF WORK <br /> In accordance with the request of Mr David Atwater of Van De Pol Enterprises, Advanced <br />' GeoEnvironmental, Inc , (AGE) has performed quarterly ground water monitoring activities at 2402 <br /> Pacific Avenue, Stockton, California (the site) <br />' This report details the monitoring and sampling procedures performed on 09 April 1997, and presents <br /> the results of the laboratory analysis The objective of the sampling is to monitor concentrations of <br /> petroleum hydrocarbons in ground water at the site A summary of previous investigations at the site <br />' was included in the Prehnnnaty Investigation and Evaluation Report - August 1996, dated 09 <br /> September 1996, prepared by AGE The location of the site and the immediately surrounding area <br /> are illustrated on Figure 1 -Location Map General site features and monitoring well locations are <br /> shown on Figure 2 - Site Plan <br /> The monitoring and sampling was performed in accordance with San Joaquin County Public Health <br /> Services - Environmental Health Division (PHS-EHD) and Regional Water Quality Control Board <br /> (RWQCB) guidelines for the investigation of underground storage tank (UST) sites <br /> 20. PROCEDURES <br /> 21 MONITORING WELL PURGE PROCEDURES <br /> On 09 April 1997, the depth to ground water in monitoring wells MW-1 through MW-4 was <br /> measured to the nearest 0 01 foot utilizing a SoIinst water level meter Relative ground water <br /> elevations were calculated by subtracting the depth to ground water from the relative casing <br /> elevations surveyed from a temporary benchmark assigned an arbitrary elevation (Table 1-Relative <br /> Ground Water Elevations) Relative ground water elevations were plotted and contoured on a scaled <br /> site map (Figure 3-Relative Ground Water Elevation Map) <br /> After water levels were measured, a minimum of three well volumes of ground water was purged <br /> from each well using a two-stage pump Approximately nine gallons of ground water was removed <br /> Ifrom wells MW-1 through MW-4 <br /> Temperature, pH and conductivity were measured at regular intervals from each well using an ICM <br /> Model 52200 water analyzer Stabilization data and field logs are contained in Appendix A Purged <br /> ground water was labeled and stored in 55-gallon drums on-site in an area lacking public access <br />