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1 <br /> 1 Quarterly Report - August 1997 <br /> W.T. Jordan Property <br /> 1 298 West Grant Line Road <br /> Tracy, California <br /> 10. INTRODUCTION AND SCOPE OF WORK <br /> ' In accordance with a request from Mr William Jordan,Advanced GeoEnvironmental, Inc (AGE) <br /> has prepared this Quarterly Report for the 298 West Grant Line Road, Tracy, California (the site) <br /> Field activities included ground water monitoring and collection and analysis of ground water <br /> samples, which was performed on 12 August 1997 Site history and findings from previous <br /> investigations and previous monitoring events at the site were last documented in the Quarterly <br /> ' Report dated 15 March 1996 prepared by AGE <br /> The site and its surrounding vicinity are illustrated in Figure 1 -Location.11ap Significant structures <br /> ' and monitoring well locations are illustrated in Figure 2 -Site Plan <br /> Monitoring and sampling procedures were performed in accordance with guidelines for investigation <br /> rof underground storage tank(UST) sites established by both the San Joaquin County Public Health <br /> Services - Environmental Health Division (PHS-EHD) and the Central Valley Regional Water <br /> Quality Control Board (CVRWQCB) <br /> ' 2.0. PROCEDURES <br /> 21 MONITORING WELL PURGE PROCEDURES <br /> ' On 12 August 1997, the water level in each monitoring well was measured relative to the top the <br /> well casing using a Solinst water level meter The depths to ground water and relative ground water <br /> ' elevations are tabulated in Table 1 - Ground 1F'ater Elevation Data <br /> At the request of the PHS-EHD,only three monitoring wells,MW-4,MW-5 and MW-6 were purged <br /> and sampled After recording water level measurements, a two-stage submersible pump was used <br /> to purge the selected monitoring wells of standing water A minimum of three well volumes of water <br /> were removed from each purged well eight gallons of water were removed from MW-5 and MW-6, <br /> twelve gallons of water were removed from MW-4 Ground water temperature,pH and conductivity <br /> were measured_at two-gallon intervals for MW-5 and MW-6, and at three-gallon intervals for MW-4 <br /> using an ICM water analyzer These parameters stabilized by the conclusion of the purging <br /> procedures (see Appendix A) Purged water was stored on-site in labeled, 55-gallon DOT-approved <br /> drums <br />