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Quarterly Report - January 1998 <br /> Shockey and Sons Trucking <br /> 850 Milgeo Avenue <br /> Ripon, California <br /> 1.0. 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 monitoring and the collection and analysis of ground water <br /> samples from four ground water monitoring wells. The location of the site and its surroundings are <br /> depicted in Figure I- Location Map. Monitoring wells, probe boring locations and a structure on the <br /> site are shown in Figure 2 - Site Plan. <br /> Site history and findings from previous investigations and previous monitoring events at the site are <br /> detailed in the Preliminary Investigation and Evaluation Report - December 1996 (PIER) prepared <br /> by AGE. These details were reviewed for the proposed recommendations listed in this quarterly <br /> report. <br /> Monitoring and sampling procedures were performed in accordance with guidelines established by <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 the investigation of <br /> underground storage tank (UST) sites. <br /> 2.0. PROCEDURES <br /> 2.1. MONITORING WELL PURGE PROCEDURES <br /> On 23 January 1998, the water level in each monitoring well was measured relative to the top of the <br /> well casings using a Solinst water level meter. The depths to ground water and relative ground water <br /> elevations are given in Table 1 - Relative Ground Water Elevation Data. <br /> After depth to water measurements, a two-stage submersible pump was used to purge each well. Six <br /> gallons of water were removed from MW-1, MW-2 and MW-3 and fifteen gallons of water were <br /> removed from MW-4 (minimum of three well volumes per well). TI.-le physicochemical <br /> characteristics of the ground water, temperature, pH and conductivity, were measured at regular <br /> purge-volume intervals using an ICM water analyzer. Purged water was stored on-site in 55-gallon <br /> DOT-approved drums. <br /> 2.4. COLLECTION OF GROUND WATER SAMPLES <br /> A water sample was collected from each well, using a new disposable plastic bailer, and was <br /> Advanced GeoEnvironmental,Inc. <br />