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Mr Nathan Crum - 2 - 19 August 2008 <br /> Valley Pacific Petroleum Service: <br /> there is not enough recent information to conclusively establish that TPHd is absent from <br /> the eastern part of the Site. In addition, laboratory analytical results showed that separate <br /> phase product samples obtained from three wells (MW-6R, MW-8, and MW-9) consisted of <br /> high sulfur diesel similar to the type used in California prior to 1993. All soil and <br /> groundwater samples submitted for laboratory analysis during this investigation must <br /> undergo analysis for TPHd as well as TPHg. <br /> We concur with the Work Plan Addendum provided that Valley Pacific will conduct the <br /> investigation in accordance with the comment above. By 1 November 2008, Valley Pacific must <br /> submit a report describing the results of the investigation. <br /> If you have any questions regarding this letter, you may contact me at (916) 464-4811 or <br /> betaylor@waterboard,_ca.gov. <br /> BRIAN TAYLOR, P.G. <br /> Engineering Geologist <br /> cc: Mr. Harlin Knoll, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Gregory Stahl, Ground Zero Analysis, Inc., Escalon <br /> Mr. Patrick Riddle, Law Offices of Patrick D. Riddle, Acampo <br /> Mr. John Miller, Valley Pacific Petroleum Services, Inc., Stockton <br />