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S E C ® R <br /> Second Quarter 2004, Groundwater Monitoring Report <br /> July 30, 2004 <br /> Page 4 <br /> assumes no responsibility for exploratory borings or data reported by other consultants or <br /> contractors <br /> Should you have any questions or concerns regarding these activities, please feel free to contact <br /> Rusty Benkosky at 916-861-0400, ext 229 <br /> Sincerely, <br /> SECOR International Incorporated <br /> Carryl Hardy Rusty Benkosky, <br /> Staff Scientist Senior Engineer %WAS � <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, Cham-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 /> m ntal Management Company,cc Robert J Cochran, Chevron Environ , San Ramon, CA e g p Y <br /> Paul Supple, Atlantic Richfield Company <br /> Marcus Pierce, California Regional Water Quality Control Board —Central Valley Region, <br /> Sacramento, CA <br /> 1 1Chevron1942751Penodic Monitoring\Q M R\2004\2Q04 doc <br />