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S IEC0R <br /> First Quarter 2004, Groundwater Monitoring Report <br /> April 30, 2004 <br /> Page 5 <br /> Enclosures <br /> • Figure 1 - Site Location Map <br /> • 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 /> • Table 3 - Groundwater Analytical Data-Oxygenate Compounds (CHEVRON) <br /> • Table 4 - Groundwater Analytical Data-Oxygenate Compounds (ARCO) <br /> • Table 5- Historical Groundwater Gradient Data <br /> • Attachment A— Field and Laboratory Procedures <br /> • Attachment B - CHEVRON Laboratory Analytical Reports, Chain-of-Custody Documents, <br /> and Field Data Sheets <br /> • Attachment C - ARCO Laboratory Analytical Reports, Chain-of-Custody Documents, and <br /> Field Data Sheets <br /> • Attachment D —CHEVRON Remedial System Performance Evaluation <br /> • Attachment E —ARCO Remedial System Performance Evaluation <br /> cc Robert J Cochran, Chevron Environmental Management Company, San Ramon, CA <br /> Paul Supple, Atlantic Richfield Company <br /> Marcus Pierce, California Regional Water Quality Control Board—Central Valley Region, <br /> Sacramento, CA <br /> 1 1Chevron1942751Pen0dic MonitonnglQMR1200411 Q04 QMR doc <br />