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-� Warren Ro e s Associates, Inc. ENV[R,,_ • �rr�AL <br /> {{ ErJA T <br /> I i <br /> 401 9' 0 EtC P` 2: 0 1 If <br /> TM <br /> November 23, 1993 <br /> Michael Kith <br /> San Joaquin County Underground Tank Program <br /> 1601 East Hazelton Ave. <br /> Stockton, CA 95205 <br /> Re: ABF Freight System, Stockton CA <br /> Dear Mr. Kith: <br /> I am the analyst at Warren Rogers Associates who handles ABF Freight's fuel inventory <br /> analysis, and am writing this letter in order to clarify the situation with regard to the fuel <br /> inventory at their Stockton, CA location. <br /> For the first eight months of this year, their Stockton CA location had no problems with <br /> their inventory, their indicated loss was always 0.00, and with the exception of their first <br /> month of analysis, the Minimum Detectable Leak (MDL) showed satisfactory inventory data <br /> collection procedures. In September and October, their inventory data showed a conversion <br /> chart problem which made it impossible to detect a loss. Using the data they had submitted <br /> to me, I did an analysis and determined the correct conversion chart for their tank. Then <br /> I went back and substituted the new chart into their data, using the inches they had <br /> recorded. This analysis covered the period from August 19 through October 31, and showed <br /> no loss, with a minimum detectable leak of 0.02 gph. Therefore I conclude that they had <br /> no detectable loss during the time they had the chart problem. Also enclosed is a copy of <br /> the new conversion chart which I have provided to them. If you have any questions, or wish <br /> to discuss this analysis with me, please feel free to contact me at 1-800-WRA-SIRA (972- <br /> 7472) ext-13. <br /> ,-,44141ek <br /> David C. Kerber <br /> Sr Technical Analyst <br /> 747 Aquidneck Avenue Middletown, Rhode Island 02840 (401) 846-4747 Fax (401) 847-8170 <br />