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Quarterly Report - March 1999 <br /> • Shockey and Sons Trucking <br /> ' 850 Milgeo Avenue <br /> Ripon, California <br /> ' 1.0. INTRODUCTION <br />' At the request of Mr. Lee Shockey, Advanced GeoEnvironmental, Inc. (AGE) has prepared this <br /> Quarterly Report for the site located at 850 Milgeo Avenue, Ripon, California(the site). The scope <br /> of work included monitoring three ground water monitoring wells and sampling two ground water <br /> monitoring wells for laboratory_analysis. The location of the site and its surroundings are depicted <br /> in Figure 1.Monitoring wells,probe boring locations, and a structure on the site are shown in Figure <br /> 2. <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. <br />' 2.0. PROCEDURES <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 />' by the Central Valley Regional Water Quality Control Board (CVRWQCB) for the subsurface <br /> investigation of underground storage tank (UST) sites. <br /> 2.1. MONITORING WELL PURGE PROCEDURES <br /> On 25 March 1999, the water level in monitoring wells MW-1, MW-2, MW-3, and MW-4 were <br /> measured relative to the tops of the well casings using a Solinst water level meter. The depths to <br /> ground water and relative ground water elevations are given in Table 1. <br />' After depth to water measurements a two-stage submersible pump was used to purge the monitoring <br /> wells. Approximately ten gallons of water was removed from wells MW-I, MW-2 and MW-3 <br /> (minimum of three well volumes per well), and twenty five gallons was removed from well MW-4. <br /> The physical characteristics of the purged ground water,including temperature, pH and conductivity, <br /> were measured using a ICM water analyzer, at 2-gallon intervals for wells MW-1,MW-2, and MW- <br /> " 3, and at -5=gallon intervals for well MW-4. <br /> 2.2. COLLECTION OF GROUND WATER SAMPLES <br /> IA water sample was collected from each well, using a new disposable plastic bailer, and was <br /> Advanced GeoEnvironmental,Inc. <br /> 1 <br />