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' Ms. Amy Terrell <br /> 31 October 2008 <br /> Page 2 <br /> ' SAMPLING PROCEDURESS <br /> ' Groundwater monitoring and Remediation Pilot Study monitoring was performed on 19 August <br /> 2008. Blaine Tech Services, Inc. (Blaine Tech) of Sacramento, California, performed all <br /> ' fieldwork associated with the sampling event. Blaine Tech's field report, including sampling <br /> procedures and logs, is provided as Attachment 1. <br /> ' GROUNDWATER ELEVATIONS <br /> Table 2 summarizes groundwater levels measured during the current and previous sampling <br /> ' events. Well locations and top of casing (TOC) elevations were surveyed for all Site monitoring <br /> wells on 31 August 2007 as part of the Expanded Pilot Test. TOC elevations presented in Table <br /> 1 and historical groundwater elevations presented in Table 2 reference the August 2007 survey <br /> ' data. <br /> ' Groundwater levels beneath the Site in August 2008 ranged from 62.40 to 61.91 feet above mean <br /> sea level (ft MSL). Groundwater elevation contours and sampling data from the 3' quarter 2008 <br /> and 1St quarter 2008 sampling events are shown in Figures 3a and 3b, respectively. The <br /> groundwater flow direction for the 3rd quarter 2008 monitoring event was to the southeast. <br /> Figure 4 shows historical groundwater elevations for all monitoring wells at the Site. MW-4 had <br /> ' a significantly lower depth to groundwater compared to the other on-site monitoring wells in <br /> January 2008; however, the depth to groundwater measured in the August 2008 sampling event <br /> ' was similar to the other on-site wells. <br /> ANALYTICAL RESULTS <br /> ' The samples collected during semi-annual groundwater monitoring were analyzed by Calscience <br /> Environmental Laboratories, Inc. (Calscience), of Garden Grove, California. The groundwater <br /> ' monitoring program is summarized in Table 3 and the Expanded Pilot Test Monitoring Program <br /> is summarized in Table 4. <br /> ' Analytical results are presented in Tables 5 and 6 and in Figures 5 through 10. The Calscience <br /> analytical laboratory report is provided as Attachment 2. Table 5 provides historical data for the <br /> past five years. Table 6 provides data from the pre-injection baseline monitoring event for the <br /> ' P:\PRJ2003REM\WFS\VER\VERG\3Q08\Report Text\3Q08 Report WFS-VER.doc <br /> engineers I scientists I innovators <br />