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y 04/29/2003 12 05 2094671AGE STOCKTON 0 PAGE @4 <br /> • 25 April 2003 <br /> AGE-NC Project No 02-0962 <br /> Page 3 of 3 <br /> Asphalt,Re-Conshtutzon <br /> According to representatives of George Reed Construction,Texchert Construction,and Granite <br /> Construction&Environmental,and consistent with AGE's experience with,treating or're-using' <br /> soil with a high silt and clay content, such as that excavated from the site, is not practicable as <br /> such soil can not be used for finish or saleable asphalt Therefore the impacted soil on the site <br /> can riot be easily treated in a cost effective manner utilizing this remedial method Only sand <br /> with a very low percentage of fines (silt and clay) can be used for production of construction- <br /> grade asphalt <br /> Soil Disposal at a state-licenced landfill <br /> • Disposal ofthe impacted soil at Forward Landfill would involve costs for loading,transportation <br /> and disposal fees,without additional analytical laboratory analyses to characterize the soil The <br /> work can proceed with minimal disruption to normal site activities <br /> • The costs for transportation and off-site landfill disposal is estimated between$20 and.$25 per <br /> ton. <br /> Based upon site conditimis and estunated costs, AGE recommends the transportation and off-site <br /> disposal of the hydrocarbon-impacted soil to Forward Landfill as the best alternative Laboratory <br /> analysis indicated that the soil was significantly impacted with hydrocarbons Because of the potential <br /> for impact to ground water,the soil could not be re-utilized for backfill purposes Therefore,in order to <br /> remove a significant "source" of contamination in soil, the excavated soil will be transported and <br /> disposed of at Forward Landfill some time in April 2003 <br /> If you have any questions or comments, please contact our office at(209) 467-1006 <br /> Sincerely, <br /> Advanced GeoEnvironmental,Inc. <br /> J. rl'a <br /> Timothy C lar <br /> Project Geologist <br /> cc Mr David Atwater, Van.De Fol Enterprises, Inc <br /> . Ms Margaret Lagono, San Joaquin County Environmental Health Department <br /> Advanced GeoEnvtronmental,Inc <br />