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it <br /> • <br /> URS <br /> Mr. Robert McClellon <br /> January 31, 2006 <br /> Page 2 <br /> RESULTS <br /> The methane concentrations in VW-1,VW-2, VW-3, VW-7S,VW-71), VW-8S,VW-9, and VW-10 <br /> were 0 percent. The methane concentrations in VW4,VW-5S,VW-513,VW-6S,VW-6D,VW-81), <br /> EW-1, and EW-2 were 6.7%, 14.7%, 13.9%, 15.7%, 10.2%, 0.1%, 17.0% and 16.5%,respectively. The <br /> oxygen concentration in all probes ranged from 0 to 21.2 percent.The carbon dioxide concentration in <br /> all probes ranged from 0.7 to 31.2 percent. The results for each probe are summarized in Table 1. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Methane was measured above 5.0% in VW-4,VW-5S,VW-51),VW-6S,VW-61),EW-1 and EW-2. <br /> Based on the most recent quarterly results, we recommend that the vapor extraction pilot test be <br /> completed when the permits to complete the pilot tests are approved by the San Joaquin Valley Air <br /> Pollution Control District and site and weather conditions allow for such activities. <br /> If you have any questions,please give me a call at(916)679-2081. <br /> Sincerely, <br /> iJR.S Corporation Americas <br /> r <br /> Ja . Kamine <br /> S ni Civil Engineer <br /> JGK/gng <br /> Enclosures: Table 1 —Summary of Results <br /> Figure 1 —Site Plan <br />