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Ms. Catherine Quinn " - 2 - 3 July 2002 <br /> 4. The Work Plan does not include a figure showing proposed locations of the initial <br /> piezometers. SFPP must include this information in the revised work plan. <br /> 5. The Work Plan does not discuss the distances that SFPP will step-out from the <br /> piezometers and borings to delineate the lateral extent of pollution. Board staff <br /> understands that SFPP will determine the step-out boring locations based on field <br /> observation and_analytical results,but SFPP needs to provide the rationale for <br /> determining the step-out locations and what will determine when no further step-out <br /> locations are necessary. <br /> 6. Table 1 of the Work Plan states that SFPP will collect total petroleum hydrocarbons as <br /> diesel (TPHd) samples in three 40-milliliter volatile organic analysis vials preserved with <br /> _hydrochloric acid. SFPP must verify with the proposed laboratory to ensure that this is <br /> the proper containment and volume for the analysis. Furthermore, SFPP must present the <br /> TPHd results without silica gel cleanup. <br /> 7. The Work Plan is not signed or stamped by the registered professional. As required by <br /> the California Business and Professions Code Sections 6735, 7835, and 7835.1, all <br /> reports shall be prepared by a registered professional or their subordinate and signed by <br /> the registered professional. <br /> By 5 August 2002, please submit a revised work plan that incorporates the above comments. If <br /> you have any questions, you may contact me at(916) 255-3119. <br /> DEVRA LEWIS <br /> Environmental Scientist <br /> cc: San'Joaquin County Environmental Health Department, Stockton <br /> Mr.Mark Wuttig and Mr. Keith Sheets, CH2M HILL, Thousand Oaks <br />