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CAMBRIA <br /> Quarterly Sampling <br /> Monitoring Wells MW-1 through MW-3 were sampled and analyzed for Total Purgeable <br /> Petroleum Hydrocarbons quantitated as gasoline (TPPH), benzene, toluene, ethylbenzene, <br /> xylenes (BTEX), and methyl-tertiary-butyl-ether (MTBE) according to EPA Method 8020 <br /> Field monitoring data and chemical analytical data are summarized in Table 1 of Blaine's <br /> ground water monitoring report, presented in Appendix A <br /> Conclusions and Recommendations <br /> Since quarterly sampling began in August of 1989, benzene has been detected in Well MW-1 <br /> five times, in Well MW-2 twice, and in Well MW-3 twice at concentrations ranging between <br /> 0 55 and 3 5 ppb Wells MW-1 through MW-3 have been ND for TPPH since their <br /> installation With the exception of one anomalous high sample result in February of 1997 <br /> and the prior and current results of 2 9 ppb and 36 ppb, respectively, Well MW-1 has been <br /> ND for MTBE since August of 1996 Concentrations of MTBE in the remaining wells have <br /> ranged between ND and 52 ppb <br /> Cambria recommends ground water monitoring and sampling continue on the established <br /> schedule <br /> If you have any questions regarding the contents of this document, please call <br /> Sincerely, <br /> Cambria Environmental Technology, Inc <br /> 91w" <br /> Mike Prinz <br /> WDjaneM <br /> er <br /> Q�pF�5 Sfdfy� <br /> L(1i��pGfi,G� <br /> Lu quest, P E iCID <br /> Principal Engineer No C46725 <br /> C46725 <br /> sr civ►. <br /> 9 <br /> OF CP��FQ <br /> 240-0832 2 <br />