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Quarterly Sampling <br /> • Monitoring Wells MW-1 through MW-3 were sampled and analyzed for Total Purgeable Petroleum <br /> Hydrocarbons quantitated as gasoline (TPPH), benzene, toluene, ethylbenzene, and xylenes (BTEX), <br /> and methyl-tertiary-butyl-ether (MTBE) according to EPA Method 8020 Additionally, a duplicate <br /> sample and an equipment blank were prepared and analyzed for quality control purposes <br /> Field monitoring data and chemical analytical data are summarized in Table 1 Blaine's ground water <br /> 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 only <br /> four times, in Well MW-2 only once, and in Well MW-3 only twice, at concentrations ranging <br /> between 0 6 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, Well <br /> MW-1 has been ND for MTBE since August of 1996 Concentrations of MTBE in the remaining <br /> wells have ranged between ND and 52 ppb <br /> Cambria recommends ground water monitoring and sampling continue on the established schedule <br /> If you have any questions regarding the contents of this document, please call <br /> Sincerely, <br /> Cambria Environmental Technology, Inc <br /> G1--�a <br /> f <br /> Thomas Magney v <br /> Project Geology t <br /> ��ptCSslO�� <br /> LUNap �yc <br /> Dian M Lundquist, P E <br /> Principal Engineer No C46725 <br /> C46725 , <br /> (is er, <br /> to <br /> 240-0832 2 <br />