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C A M B R I A Date April 10, 2006
<br /> Quarter V Quarter 2006
<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 /> SW8021B, and methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary
<br /> butyl alcohol (TBA), 1,2--dibr�asi�iee Bane, diisopropyl ether (DIPE), ethylene dibromide (EDB), Ot
<br /> eth1, ethyl tertiary-butyl ether (ETBE), and 1,2-dichloroethane (1,2-DCA) by EPA Method �Iz16
<br /> SW8260B ! I
<br /> TPHd was detected in Jimco wells MW-1, MW-2, MW-5, and MW-9 at concentrations of 51,000
<br /> micrograms per liter (gg/L), 2,900 gg/L, 120 gg/L, and 240 gg/L, respectively TPHd was also
<br /> detected in RFS well MW-6 at a concentration of 21,000 gg/L TPHg was detected in Jimco
<br /> wells MW-1 and MW-2 at concentrations of 360 gg/L and 69 gg/L, respectively BTEX
<br /> compounds were detected in well MW-1, at concentrations of 1 1 gg/L, 1 5 gg/L, 10 gg/L, and
<br /> 1 8 gg/L, respectively MTBE was detected in Jimco wells MW-1, MW-2, MW-3, MW-9 and
<br /> MW-10 at concentrations of 51 gg/L, 0 76 gg/L, and 0 90 gg/L, 370 gg/L, and 410 gg/L,
<br /> respectively MTBE was also detected in RFS well MW-8 at a concentration of 200 gg/L TBA
<br /> . was detected in wells MW-1, MW-2, and MW-9 at concentrations of 570 gg/L, 6 7 gg/L, and 140
<br /> gg/L, respectively TAME was only detected in RFS well MW-8 at a concentration of 18 gg/L
<br /> A summary of groundwater analytical results is presented in Table 1 and Figure 2
<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 /> Figure 1 Vicinity Map
<br /> Figure 2 Groundwater Elevation and Hydrocarbon Concentration Map
<br /> Table 1 Groundwater Elevation and Analytical Data
<br /> Appendix A Standard Field Procedures for Groundwater Monitoring and Sampling
<br /> Appendix B Certified Analytical Report and Cham-of-Custody Documentation
<br /> Appendix C Field Data Sheets
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