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QUARTERLY REPORT <br /> September 1996 <br /> Shockey and Sons Trucking <br /> 850 Milgeo Avenue. <br /> tRipon, California <br /> I.O. INTRODUCTION <br /> In accordance with the request of Mr. Lee Shockey,Advanced GeoEnvironmental, Inc. (AGE) has <br /> prepared this Quarterly Report for the site located at 850 Milgeo Avenue, Ripon, California (the <br /> site). The scope of work included the sampling of four ground water monitoring wells. The location <br /> of the site and its surroundings are depicted in Figure 1- Location Map. Monitoring wells, probe <br /> boring locations and a structure on the site is shown in Figure 2 -Site Plan. Site history and findings <br /> from previous investigations and the previous monitoring event at the site are detailed in the <br /> Preliminary Site Evaluation and Investigation (PEIR) Report prepared by AGE. <br /> ' Monitoring and sampling procedures were performed in accordance with guidelines established b <br /> p � Y <br /> the San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) and <br />., the Central Valley Regional Water Quality Control Board (CVRWQCB) for investigation of <br /> underground storage tank(UST) sites. <br /> 2.0. PROCEDURES <br />' 2.1. MONITORING WELL PURGE PROCEDURES <br /> On 24 September 1996, the water level in each monitoring well was measured relative to the tops <br /> of the well casings using a Solinst water level meter. The depths to ground water and relative ground <br /> water elevations are given in Table 1 - Ground Water Elevation. Approximately 0.3 inches of free' <br />' product was present in MW-4. An MMC interface probe was used to measure the product thickness. <br /> After water levels were measured, a two-stage submersible pump was used to purge each well. Five <br />' to six gallons of water were removed from MW-1, MW-2 and MW-3 (minimum of three well <br /> volumes) and twelve gallons of water were removed from MW-4. The ground water parameters of <br />' temperature, pH and conductivity were measured at two-gallon intervals, using an ICM water <br /> analyzer. The ground water parameters stabilized during purging (Appendix A). Purged water was <br /> stored on-site in,55-gallon DOT drums. <br /> 2.2. COLLECTION OF GROUND WATER SAMPLES <br /> Water samples were collected from each well using a new <br /> disposable plastic bailer. Each water <br /> p <br /> sample was collected in two 40-m1 VOA vials and one 1-liter amber bottle. After collection, the <br /> `i <br /> : i <br />