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t <br /> CAMBRIA <br /> REMEDIATION SUMMARY <br /> A soil vapor extraction (SVE) system operated at this site from September 1992 to November <br /> 1996. During this time, the SVE system removed approximately 17,628 pounds of vapor phase <br /> total purgeable hydrocarbons as gasoline from the subsurface. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Hydrocarbon and methyl tertiary butyl ether concentrations are within the historical norm for this <br /> site. Well MW-8 has been analyzed for 1,2-DCA after it was detected in the well during the <br /> second quarter of 2000. None has been detected since, suggesting that the May 2000 result was a <br /> false positive. Cambria proposes discontinuing 1,2-DCA analysis and would like to implement <br /> this change, with SJCPHS/EHD's approval, beginning with the third quarter 2001 sampling <br /> event. <br /> As discussed during our June 19, 2001 meeting with SJCPHS/EHD staff, Cambria will prepare a <br /> work plan proposing additional cone penetration test borings. <br /> CLOSING <br /> If you have any questions regarding the contents of this document, please call Aubrey Cool at <br /> (707) 933-2368. <br /> Sincerely, <br /> Cambria Environmental Technology, Inc. <br /> Co 6.-L <br /> Lisa Summers <br /> Staff Scientist <br /> GFO� <br /> H W. �FOCs <br /> Joe W. Neely, RG <br /> Senior Project Geologist o No.6927 <br /> RG 6927 <br /> `Q. <br /> 9�OF CA1-�� <br /> 0778 2 <br />