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QUARTERLY REPORT <br /> August 1996 <br /> W.T. Jordan Property <br /> +� 298 West Grant Line Road. <br /> Tracy, California <br /> w <br /> 1.0. 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 summarizing field activities performed at 298 West Grant Line <br /> Road, Tracy, California, on 30 August 1996, The scope of work included the quarterly sampling of <br /> six ground water monitoring wells related to the site. The site and its surrounding vicinity are <br /> illustrated in Figure 1 - Location Map. Significant structures and monitoring well locations are <br /> illustrated in Figure 2 - Site Plan. Background information and a description of previous <br /> investigations at the site were presented in the Quarterly Report -January 1996, dated 15 March <br /> 1996,prepared by AGE. <br /> a. <br /> Monitoring and sampling procedures were performed in accordance with guidelines for investigation <br /> of 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 /> 2.1. MONITORING WELL PURGE PROCEDURES <br /> On 30 August 1996, the water level in each monitoring well was measured relative to the top of its <br /> casing using a Solinst water level meter. The depths to ground water and relative ground water <br /> • elevations are tabulated in Table 1 -Relative Ground i3'ater Elevation. A thin sheen of free product <br /> was present in MW-4; however, an MMC interface probe was unable to measure the product <br /> thickness. <br /> F <br /> L. After water levels were measured, a two-stage submersible pump was used purge each well of <br /> standing water. A minimum of three well volumes of water were removed from each well: ten <br /> gallons of water were removed from MW-1, MW-2, MW-3, and MW-4; five gallons of water were <br /> &- removed from MW-5 and MW-6. Ground water parameters were measured at two- or one-gallon <br /> t intervals using an ICM water analyzer, until temperature, pH and conductivity had stabilized (see <br /> see Appendix A). Purged water was stored on-site in labeled, 55-gallon DOT drums. <br /> ti <br />