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t <br /> CAMBRIA <br />'1 Quarterly Sampling <br /> Groundwater samples were analyzed for total purgeable hydrocarbons as gasoline (TPHg) by <br /> EPA Method 8015 (Modified) and benzene, toluene, ethylbenzene, xylenes (BTEX), and <br /> methyl tertiary butyl ether (MTBE) by EPA Method 8020 <br /> Field monitoring data and chemical analytical data for TPHg, BTEX, and MTBE are <br /> presented in a summary table in Blaine's groundwater monitoring report (Appendix A) The <br /> seven fuel oxygenates were analyzed during the November 1997 sampling event <br /> Conclusions and Recommendations <br /> Petroleum hydrocarbons and MTBE concentrations have consistently been low or below <br /> laboratory detection limits at this site Cambria recommends reducing the sampling <br /> frequency to annual for this site in order to reduce costs associated with monitoring, <br /> sampling, and reporting Cambria plans to implement the revised sampling schedule starting <br /> in the first quarter of 2000 unless we hear otherwise from SJCPHS/EHD <br /> If you have any questions regarding the contents of this document, please call Joe Neely at <br /> (707) 935-4854 <br /> Sincerely, <br /> Cambria Environmental Technology, Inc <br /> q4k—"�- W� <br /> Lisa SYM`mers <br /> Staff Scientist D GEO <br /> W �FOCs <br /> Joe W Neely, RG <br /> Senior Project Geologist No 6927 • <br /> RG 6927 <br /> • <br /> 241-0832 2 <br />