ARCHIVED REPORTS_QUARTERLY REPORT - SECOND QUARTER 2008

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1. INTRODUCTION Advanced GeoEnvironmemal, Inc. has prepared this Second Quarter 2008 Groundwater Monitoring Report for the French Camp Grain Elevator (FCGE) facility on behalf of Huff & Huff, Inc. and its client, Continental Grain Company (CGC). The FCGE site is located at 9504 South Harlan Road in French Camp, California. This report describes the results of field work conducted on 5 May 2008 (pre-start up sampling event) and 18 June 2008 (quarterly sampling event) in which groundwater was sampled by Advanced GeoEnvironmental, Inc. and Confluence Environmental, Inc., respectively, from selected monitoring wells at the site and analyzed for volatile organic compounds (VOCs) by EPA method 8260B. Monthly reports documenting characteristics of the groundwater recirculation system are being submitted under separate cover. This work was conducted in accordance with Monitoring and Reporting Program R5-2007-0826 issued by the RWQCB on 05 December 2007 in association with the groundwater recirculation pilot test conducted at the site. The two primary VOCs at the site are carbon tetrachloride and, to a lesser extent, chloroform. This report summarizes the results from the second quarter 2008 groundwater monitoring event. Briefly, three water-bearing zones have been identified at the FCGE site. The upper most water- bearing unit is referred to as the shallow zone, and wells monitoring this zone are identified by the well number followed by the letter "A". The depth of this shallow water bearing zone ranges from approximately 21 to 33 feet below ground surface (bgs). The next water-bearing unit is referred to as the intermediate zone. Wells monitoring this zone are identified with the letter`B". The depth of this intermediate zone ranges from approximately 60 to 80 feet bgs. The deepest water-bearing unit being monitored is referred to as the deep zone and the one well monitoring this unit is identified with the letter"C". The depth of this zone ranges from 120 to 130 feet bgs. Historically, groundwater appears to generally flow towards the north or northeast in both the shallow and intermediate zones; however, the flow in both zones has been variable during the duration of this project due to seasonal conditions. During the May 2008 and June 2008 sampling events, groundwater flow direction in the intermediate zone was variable and featured a hydraulic mound near wells MW-9B and MW-10B. This hydraulic mound has occurred historically (pre-system startup) since installation of these wells. The hydraulic gradient in the intermediate zone varies from less than 0.002 ft/ft to 0.008 ft/ft. Tablesl and 2 provide potentiometric groundwater surface elevations for the May pre-startup and June 2008 quarterly sampling events. Figures 3 and 4 illustrate groundwater flow and gradient information on 05 May and 18 June 2008 for the intermediate zone. During the second quarter sampling events, carbon tetrachloride was detected in all monitoring wells sampled(See Table 4). Carbon tetrachloride concentrations increased wells in MW-413, 1