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C A M B R I A <br /> • limit was elevated (<500 ppm) A chemical concentration map is presented on <br /> Plate 2 <br /> Quarterly Sampling <br /> Monitoring Wells S-1 through S-3 were sampled and analyzed for Total Purgeable Petroleum <br /> Hydrocarbons quantified as gasoline (TPPH) according to EPA Method 8015 (Modified), <br /> benzene, toluene, ethylbenzene, xylenes (BTEX), and MTBE according to EPA Method <br /> 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 /> Low levels of petroleum hydrocarbons were detected in Wells S-2 and S-3 for the first time <br /> since the wells were installed TPPH concentrations in Well S-1 declined this quarter, <br /> although BTEX levels in this well remained consistent with the previous quarter's data <br /> • Cambria recommends sampling and monitoring 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 /> .toe W Neely <br /> Project Maria er QRp�ES31p ,� <br /> LUIVppN�2c <br /> G <br /> m <br /> Diane M Lundquist, P E No 046725 <br /> Principal Engineer <br /> LP C10- <br /> C 46 72 5 Tq��F C��1���` <br /> • <br /> 240-0797 2 <br />