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C A M B R I A Date July 18, 2006 <br /> . Quarter 2°d Quarter 2006 <br /> the analytical results and Appendix B includes analytical reports for wells sampled under <br /> Cambria direction <br /> Select groundwater samples were analyzed for total petroleum hydrocarbons as diesel (TPHd) <br /> and total petroleum hydrocarbons as motor oil (TPHmo) by modified United States <br /> Environmental Protection Agency (EPA) Method SW8015C, total petroleum hydrocarbons as <br /> gasoline (TPHg), benzene, toluene, ethylbenzene, and xylenes (BTEX) by EPA Method <br /> SW802113, and methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary <br /> butyl alcohol (TBA), dusopropyl ether (DIPS), ethylene dibromide (EDB), ethyl tertiary-butyl <br /> ether (ETBE), and 1,2-dtchloroethane (1,2-DCA) by EPA Method SW8260B <br /> TPHd was detected in Junco wells MW-1, MW-2, and MW-9 at concentrations of 25,000 <br /> micrograms per liter (gg/L), 4,200 gg/L, and 140 gg/L, respectively TPHd was detected in RFS <br /> well MW-6 at a concentration of 33,000 gg/L KTPHg was detected in Jimco wells MW-1 and <br /> MW-2 at concentrations of 390 gg/L and 98 pg/L, respectively TPHg was detected in RFS well <br /> also g�J 1 n M W 6 )bogie_ <br /> MW-6 at a concentration of 28,000 µg/L, tfiowever, this concentration appears to be related to <br /> diesel range hydrocarbons overlapping into the TPHg analysis range as the laboratory notes <br /> suggest and due to n� o-be�nz r�re.Ta d MTBE bang detected Benzene, toluene, and ethylbenzene <br /> were detected in well MW-1, at concentrations of 072 gg/L, 083 gg/L, and 67 gg/L, <br /> respectively MTBE was detected in Jimco wells MW-1, MW-2, MW-9 and MW-10 at <br /> concenti attons of 37 gg/L, 0 55 gg/L, 320 gg/L, and 380 gg/L, respectively MTBE was detected <br /> ctIso-rAr4r--I�p II�t <br /> in RFS well MW-8 at a concentrajion of 130 gg/L—A summary of groundwater analytical results <br /> is presented in Table 1 and Figure 2 <br /> • <br /> Groundwater monitoring and analytical data for wells gauged and sampled under the direction of <br /> Cambria for the first quarter 2006 have been submitted to the GeoTracker database <br /> ATTACHMENTS <br /> Figuie 1 Vicinity Map <br /> Figure 2 Groundwater Elevation and Hydrocarbon Concentration Map <br /> Table 1 Groundwater Elevation and Analytical Data <br /> Appendix A Standaid Field Procedures for Groundwater Monitoring and Sampling <br /> Appendix B Certified Analytical Report and Chain-of-Custody Documentation <br /> Appendix C Field Data Sheets <br /> • <br /> H IOiympiun122502 south Hwy 99 RiponIQM\200612Q0612Q 06 QMR doc 2 <br />