Laserfiche WebLink
I <br /> QUARTERLY REPORT <br /> January 1997 <br /> Top Filling Station <br /> 101 South Wilson Way <br />' Stockton, California <br /> 1.0 INTRODUCTION <br /> In accordance with the request of Mr Ed Endich, Advanced GeoEnvironmental, Inc (AGE), has <br /> prepared this Quarterly Report for the property at 101 South Wilson Way, Stockton, California The <br /> report summarizes held work performed at the site during January 1997 A description of previous <br /> investigations at the site was included in Quarte?ly Report- October 1996, dated 22 November 1996, <br /> prepared by AGE The location of the site is illustrated in Figure 1 - Location Map A layout of the <br /> property is depicted in Figure 2 - Site Plan <br /> This report is prepared in accordance with the San Joaquin County Public Health Services - <br /> Environmental Health Division (PHS-EHD) and the Central Valley Regional Water Quality Control <br /> Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites <br /> 2.0. QUARTERLY IMONITORING PROCEDURES <br /> 2 1 MONITORING WELL PURGE PROCEDURES <br /> On 08 January 1997, the depth to ground water in each monitoring well was measured to the nearest <br /> 0 01 foot utilizing a Solinst water level meter The relative ground water elevations were calculated <br /> by subtracting the depth to ground water from the relative casing elevations surveyed from a <br /> temporary benchmark assigned an arbitrary elevation (Table 1-Relative Gr ound Water Elevations) <br /> Relative ground water elevations were plotted and contoured on a scaled site map (Figure 3 - <br /> Relative Eleva/ian Gi ound Wate1 Map) <br /> After water levels were measured, approximately 12 to 15 gallons of ground water (minimum of three <br /> well volumes) were removed from wells MW-I through MW-5, while approximately 8 gallons of <br /> ground water were removed from well VW-IC utilizing a Grundfos Redi-Flo II submersible pump <br /> Temperature, pH and conductivity were measured at regular intervals from each well using an ICM <br /> model 52200 water analyzer, to monitor for stabilization of these characteristics Stabilization data <br /> and field logs are included with Appendix A Purged ground water was containerized in 55-gallon <br /> drums and stored on-site in an area inaccessible to the general public <br /> I <br /> 2 2 GROUND WATER SAMPLING <br /> The ground water levels in monitoring wells MW-I through MW-5 and VW-1C, were allowed to <br /> recover for a minimum of one hour pnor to sample collection Water samples were collected utilizing <br />