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AUG 2 1 2001 ///7APEX1844 Madison Avenue,Suite 106 • fair Oaks,CA 95638 E N V I R 0 1 E C H , I N [ . 1.800.242.5244 • Ph.916.535.0200 • Fax 916.535.0201 Interim Remediation Plan and Second Quarter 2001 Groundwater Monitoring Report Moore Petroleum Bulk Plant 5491 F Street,Banta, California Apex Project 9 ERA02.004 Apex Envirotech, Inc. (Apex), has been authorized by Moore Petroleum (Moore) to.provide this Interim Remediation Plan (IRP) report regarding'the clean up of petroleum constituents in soil and groundwater at the above referenced site (Figure 1). The purpose of this IRP is to determine a cost-effective way to remediate the site and to control the offsite migration of petroleum constituents, primarily methyl tertiary butyl ether (MTBE). MTBE was detected in the Rhodes domestic well located just west of the site at 5451 F Street on October 27, 2000. Also included in this report are the results of a groundwater'pumping test, utilizing groundwater recovery well RW-2, conducted at the site during the week of March 26, 2000 and results of quarterly groundwater monitoring conducted on April 5, 2001. - The quarterly monitoring included collection of depth-to-water measurements and groundwater samples from monitoring wells MW-1, MW-2, MW-3, MW-4A, MW-5, MW-7 through MW-12, recovery well RW-1, and vapor extraction well VEW-2, at the subject site (Figure 2). In addition, the Rhodes domestic well was sampled on a monthly basis during the quarter. MW-6 could not be located and was not sampled during this quarter. BACKGROUND Apex began work on this project with the groundwater monitoring conducted on January 14, 1994. Prior to Apex, work conducted at the site included subsurface investigations and groundwater monitoring by Earth Treatment Systems, Inc., of Manteca, California; Delta Environmental Consultants, Inc., (Delta) of Rancho Cordova, California; Nations Groundwater Associates of Sacramento, California; and Aegis Environmental, Inc. (Aegis), of Roseville, California. Site details may be found in the Quarterly Groundwater Monitoring Report, dated April 18, 1991, submitted to Moore by Aegis (Appendix A).