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n <br /> CAMBRIA <br /> Quarterly Sampling <br /> Monitoring Wells MW-1 through MW-7 and VEW-2 were sampled and analyzed for Total <br /> Purgeable Petroleum Hydrocarbons quantitated as gasoline (TPPH) according to EPA <br /> Method 8015 (Modified), benzene, toluene, ethylbenzene, xylenes (BTEX) and methyl- <br /> tertiary-butyl-ether (MTBE) according to EPA Method 8020, and tertiary-butanol, MTBE, <br /> di-isopropyl ether (DIPS), ethyl-tertiary-butyl ether (ETBE), and tertiary-amyl-methyl <br /> ether (TAME) by EPA Method 8260 <br /> Field monitoring data and chemical analytical data are presented in a summary table in <br /> Blaine's ground water monitoring report (Appendix A) <br /> Conclusions <br /> Well MW-5 had lower concentrations of hydrocarbons than previous quarters, whereas Well <br /> MW-3 had higher concentrations of hydrocarbons this quarter The remainder of the wells at <br /> this site had concentrations of petroleum hydrocarbons and MTBE consistent with historical <br /> norms for this site <br /> Recommendations <br /> Site monitoring and sampling will continue according to the established schedule <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 /> Wayne Chiu <br /> Staff En eer <br /> ---- <br /> cV <br /> Diane M uist, P E ~' <br /> Principal Engineer No 046723 <br /> C46725 <br /> CIVIV <br /> 9 OF CAL�F�� <br /> 240-0854 2 <br />