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i <br /> �-- <br /> 1 � <br /> Second Quarter 2003, Groundwater Monitoring Report <br /> July 30, 2003 <br /> Page 4 <br /> Enclosures <br /> 4 <br /> • <br /> Figure 1 - Site Location Map <br /> o Figure 2- Groundwater Elevation Contour Map <br /> • Figure 3 - Groundwater Concentration Map <br /> • Table 1 - Groundwater Elevation and Analytical Data (CHEVRON) <br /> • Table 2 - Groundwater Elevation and Analytical Data (ARCO) <br /> 0 Table 3 -Groundwater Analytical Data-Oxygenate Compounds (CHEVRON) <br /> ® Table 4 - Historical Groundwater Gradient Data <br /> ® Attachment 1 —ARCO Remedial System Performance Evaluation <br /> ® Attachment 2 - Field and Laboratory Procedures <br /> ® Attachment 3 - CHEVRON Laboratory Analytical Reports, Chain-of-Custody Documentation, <br /> and Field Data Sheets <br /> o Attachment 4—ARCO Laboratory Analytical Reports, Chain-of-Custody Documentation, and <br /> Field Data Sheets <br /> cc Mr Robert J Cochran, Chevron Environmental Management Company, San Ramon, CA <br /> Mr Paul Supple, Atlantic Richfield Company <br /> Mr Marcus Pierce, California Regional Water Quality Control Board—Central Valley Region, <br /> Sacramento, CA <br /> f <br /> I <br /> 11Chevron1942751Penodic MonitoringlQMR1200312003 revised QMR Chev and Arcol doc a <br />