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CAM B R I A <br /> variance to the southeast, at an approximate hydraulic gradient ranging from 0 008 <br /> to 0 01 <br /> 4 Ground water analytical results for Wells MW-1 through MW-5, RW-1, RW-2, and <br /> VEW-1 through VEW-4 indicated MTBE concentrations ranged from ND to 380 <br /> ppb TPPH and benzene were not detected in any of the collected ground water <br /> samples A chemical concentration map is presented on 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 <br /> analyzed for Total Purgeable Petroleum Hydrocarbons quantitated as gasoline (TPPH) <br /> according to EPA Method 8015 (Modified), benzene, toluene, ethylbenzene, xylenes <br /> (BTEX), and methyl-tertiary-butyl-ether (MTBE) according to EPA Method 8020 Well <br /> VEW-3 was also sampled and analyzed for halogenated volatile organics by EPA Method <br /> 8010 Additionally, a duplicate sample and an equipment blank were prepared and analyzed <br /> for 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 /> Quarterly sampling and monitoring will continue on 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 /> Darren Croteau <br /> 4Diae <br /> o t <br /> �Po�lrssro,;,� <br /> 1_U11rL <br /> Lundquist, P E s ~` <br /> Principal Engineer No C46725 <br /> C46725 �. <br /> S' ClV14 <br /> r'�rf OF CAl <br /> • <br /> 240-0821 2 <br />