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CAMBRIA <br /> Quarterly Sampling <br /> Monitoring Wells MW-I 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 (DIPE), ethyl-ternary-butyl ether (ETBE), and ternary-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 /> Wells MW-1 through MW-3 have lower concentrations of hydrocarbons than previous <br /> quarters, whereas Wells MW-4 and MW-7 had higher concentrations of hydrocarbons this <br /> quarter The remainder of the wells at this site had concentrations of petroleum <br /> . hydrocarbons consistent with historical 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 /> arren Croteau <br /> Staff Ge loeund—quist, <br /> ist <br /> Diane M P E c y, Tr <br /> ° C46725 <br /> Principal Engineer <br /> C46725 s.- civn ` <br /> 240-0854 2 <br />