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r� <br /> 04 April 2006 <br /> . AGE-NC Project No 99-0624 <br /> Page 2 of 2 <br /> analytical laboratory The samples were analyzed for <br /> • Fuel additives di-isopropyl ether(DIPS),ethyl tertiary-butyl ether(ETBE), methyl tertiary- <br /> butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA) in <br /> accordance with EPA Method 8260B <br /> Based on analytical results of the above referenced grab water samples, MTBE was detected from <br /> MW-2 on all five occasions at concentrations between 5,800 µg11 and 51,000 µg/1, TAME was <br /> detected on all five occasions at concentrations between 10 µg/1 and 95 pg/l (MW-2) No other <br /> constituents of concern were detected at or above laboratory reporting limits in the analyzed samples <br /> Analytical results of batch removal groundwater samples are summarized in Table 2 The laboratory <br /> reports (CTEL Project Nos 0601-144, 0601-152 and 0601-161) and chain of custody forms are <br /> presented in Appendix A Confirmation pages of the laboratory electronic digital format(EDF)files <br /> submitted to the State of Califorma's GeoTracker website are included in Appendix B <br /> Between 23 and 27 January 2006, an estimated 104 pounds of MTBE was extracted from ground <br /> water(Table 3),combined with the previous October 2005 batch removal event,a grand total of 2 07 <br /> • pounds of MTBE has been extracted from the site The January 2006 batch removal mass-volume <br /> calculations of MTBE-impact extracted from the ground water batch removal event are presented <br /> in Appendix C <br /> At the conclusion of the ground water batch removal event (27 January 2006), a total of 6,400 <br /> gallons of extracted ground water from MW-2 was transported off-site by American Valley Waste <br /> Oil,Inc to Cascade General Inc ,an EPA-approved waste water facility located in Portland,Oregon <br /> A copy of the non-hazardous waste manifest is included in Appendix D If you have any questions <br /> or comments, please contact me at(209) 467-1006 <br /> Sincerely, <br /> Advanced GeoEnvironmental, Inc. FRSs+fl94AL <br /> °r\NM R 41" <br /> * No 7473 <br /> Timothy J ue aur William R Little <br /> Project Geologist Senior Project Geologist <br /> Enclosure California Professional Geolog A <br /> cc <br /> Mr Pete Graffigna, Flame Mini-Mart <br /> Mr Jim Barton, California Regional Water Quality Control Board- Central Valley Region <br /> t <br /> Advanced GeoEnvironmental,Inc <br />