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15 May 1998 <br /> AGE-NC Project No. 97-0326 <br /> Page 2 of 2 <br /> The lower hydrocarbon concentrations were likely due to aeration of soil during excavation, <br /> transport and elapsed time between stockpiling and sampling. Analytical results of soil samples are <br /> included in Table 1. <br /> Proposed Disposition of Hydrocarbon-Impacted Soil <br /> Since detectable concentrations of hydrocarbons were present, it is our understanding that the <br /> stockpiled soil cannot be used for backfill material. Therefore, the stockpiled soil will be disposed <br /> at a Class III landfill (Forward, Inc.). AGE has been able to negotiate a reduced fee for disposal, <br /> based upon the low concentrations of detected hydrocarbons. <br /> A cost estimate for the transportation, characterization and disposal of the impacted soil will be <br /> transmitted to the Underground Storage Tank Cleanup Fund for approval. If you have any questions <br /> or require further information, please contact our office at (209) 467-1006. <br /> Sincerely, <br /> Advanced GeoEnviron mental, Inc. <br /> Kevin McKibben Robert E. arty <br /> Senior Staff Geologist Project Geologist/Director f Operations <br /> cc: Mr. Khaldoon Othman <br /> .Advanced GeoEnvironmental,Inc. <br />