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C A M B R I A <br /> Quarterly Sampling <br /> Monitoring Wells MW-I 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 /> Additionally, a duplicate sample and an equipment blank were prepared and analyzed for <br /> quality control purposes <br /> Field monitoring data and chemical analytical data are summarized in Table 1 Blaine's <br /> ground water monitoring report is 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 /> only five times, in Well MW-2 only once, and in Well MW-3 only twice, at concentrations <br /> ranging between 0 55 and 3 5 ppb Wells MW-1 through MW-3 have been ND for TPPH <br /> since their installation With the exception of one anomalous high sample result in February <br /> of 1997 and the current result of 2 9 ppb, Well MW-1 has been ND for MTBE since August <br /> of 1996 Concentrations of MTBE in the remaining wells have ranged between ND and 52 <br /> 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 /> " 6r <br /> Thomas Magney <br /> Pro�ec eologi QRoFESSIpN <br /> I.uryo �F�� <br /> Co <br /> G 1 <br /> w � fir" <br /> Diane M Lundquist, P E No C46725 <br /> Principal Engineer <br /> C46725 <br /> �Of CPL�F�aC� <br /> 240-0832 2 <br />