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. 0 Cambria Environmental Technology, Inc (Cambria) evaluated water-level measurement data <br /> and prepared a ground water contour map (Plate 2) Ground water appears to flow east- <br /> northeasterly at an approximate hydraulic gradient of 0 008 <br /> Ground water samples from Wells MW-1 through MW-5, RW-1, RW-2, and VEW-1 through <br /> VEW-4 contained MTBE concentrations ranging from ND to 120 ppb by EPA Method <br /> 8020 TPPH and BTEX were not detected A chemical concentration map is presented on <br /> Plate 2 <br /> Quarterly Sampling <br /> Wells MW-1 through MW-5, RW-1, RW-2, and VEW-1 through VEW-4 were sampled and analyzed <br /> for Total Purgeable Petroleum Hydrocarbons quantitated as gasoline (TPP14) and methanol according <br /> to EPA Method 8015 (Modified), benzene, toluene, ethylbenzene, and xylenes (BTEX) and methyl- <br /> tertiary-butyl-ether (MTBE) according to EPA Method 8020, and ethanol, t-butanol, MTBE, Dt- <br /> isopropyl ether, ethyl t-butyl ether, and t-amyl methyl ether according to EPA Method 8260 <br /> Additionally, a duplicate sample and an equipment blank were prepared and analyzed for quality <br /> control purposes <br /> Field monitoring data and chemical analytical data are summarized in Table i Blaine's quarterly <br /> ground water monitoring report is presented in Appendix A <br /> If you have any questions regarding the contents of this document, please call <br /> Sincerely, <br /> Cambria Environmental Technology, Inc <br /> Matthew E on e <br /> Project Engineer <br /> �o�ROFESS!(1y91 <br /> L u'v0 <br /> Diane M Lundquist E C n <br /> Senior Engineer NO C46725 <br /> C46725 <br /> CIVI <br /> r <br /> 369 2 <br />