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24 November 2008 <br /> AGE-NC Project No. 98-0533 <br /> Page 3 of 3 <br /> • Total petroleum hydrocarbons quantified as aviation fuel(TPH-ag)in accordance with EPA <br /> Method TO3; and <br /> • Benzene, toluene, ethylbenzene and xylenes (BTEX),and methyl tertiary-butyl ether <br /> (MTBE), in accordance EPA Method TO 15. <br /> Laboratory reports for soil vapor analysis, testing methods, laboratory quality assurance/quality <br /> control (QA/QC)report, and sample chain of custody documentation will be presented in a report <br /> of findings and recommendations. Field procedures for soil and soil-vapor sample collection are <br /> described in the Soil Vapor Survey Work Plan, dated 11 July 2007. <br /> Please contact our office at(209)467-1006 if you have any questions or comments. <br /> Sincerely, <br /> Advanced GeoEnvironmental,Inc. QQOFE�poMor � <br /> i No. 7473 <br /> Rebecca E. Nat William R. Little <br /> Staff Scientist Senior Project Geologist s <br /> California Professional Geologis <br /> cc: Mr. Robert Kupka <br /> Advanced GeoEnvironmental,Inc <br />