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C A M B R I A <br /> Vent Lines: Two soil samples were collected from beneath the former vent lines. TPHd <br /> concentrations in samples VN1-4.5' and VS-1-6' were 130 and 67.5 ppm, respectively. No <br /> TPHg, benzene, or MTBE were detected in these samples. <br /> CONCLUSIONS <br /> During this investigation, petroleum hydrocarbons were identified in soil at several locations <br /> beneath the subject site. In the course of removal and over-excavation activities, <br /> approximately 860 tons of hydrocarbon-impacted soil was removed from the site. <br /> This site is an active environmental case under SJCPHS-EHD oversight. There are currently <br /> several groundwater monitoring wells at this site, and a quarterly monitoring program is in <br /> place. <br /> On August 26, 1999, Cambria submitted a Site Investigation Work Plan proposing additional <br /> investigation. Cambria is prepared to implement this work plan pending SJCPHS-EHD <br /> approval. <br /> If you have any questions regarding the contents of this report, please call Joe Neely at <br /> (707) 935-4854. <br /> Sincerely, <br /> Cambria Environmental Technology, Inc. <br /> Aubrey K. Cool <br /> Staff Geologist E[) GEO` <br /> O�S �QNWtiC) <br /> Joe W. Neely, RG <br /> Senior Project Geologist No.6927 • <br /> RG 6927 <br /> OF CAL\FOS\ <br /> 241-1399 6 <br />