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1.0 INTRODUCTION <br /> Conestoga-Rovers & Associates (CRA) prepared this report on behalf of Equilon <br /> Enterprises LLC dba Shell Oil Products US(Shell). <br /> 1.1 SITE INFORMATION <br /> Site Address Neighborhoods B, C, &D, Mountain House, <br /> CA <br /> Site Use Residential development and agricultural <br /> land <br /> Shell Project Manager Kevin Dyer <br /> CRA Project Manager Jeff Gaarder <br /> Lead Agency and Contact Brian Taylor <br /> Shell SAP Code 7102308 <br /> Shell Incident No. 300780 <br /> Date of most recent agency correspondence was November 5,2010. <br /> 2.0 SITE ACTIVITIES AND FINDINGS <br /> 2.1 CURRENT QUARTER'S ACTIVITIES <br /> Blaine Tech Services, Inc. (Blaine) gauged and sampled the wells according to the <br /> established monitoring program for this site. This site is monitored quarterly and CRA <br /> issues groundwater monitoring reports following the sampling events. <br /> CRA prepared a vicinity map (Figure 1) and five groundwater contour and chemical <br /> concentration maps (Figure 2a, 2b, 2c, 3a, and 3b) for the Neighborhood B, C, and D <br /> areas. The groundwater flow directions and estimated hydraulic gradients for each <br /> Neighborhood are summarized in Section 2.2. Table 1 presents the petroleum <br /> constituent concentrations and groundwater elevations. Blaine's report, presenting the <br /> analytical data,is included in Appendix A. <br /> 050222 02) 1 CONESTOGA-ROVERS&ASSOCIATES <br />