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PRE-TANK REPLACEMENT Site Assessment Results 880 VICTOR ROAD L0D1, CA. Aegis Project No. 89-014 Page 17 weather conditions and permit restrictions. During the aeration the soil would be tilled. Upon completion of the aeration process the soil would be hauled to a landfill . This option can not be completed in a timely manner and the permit restrictions of aeration, two sampling events and tilling add to the cost of hauling the soil directly to a class II landfill. 2) Direct disposal at a class II landfill is a viable option if the TPH levels in the soil are below 1000 ppm. If TPH levels in the soils are greater than 1000 ppm, the soils will need to be aerated before being accepted at a class II disposal facility. Currently, the closest Class II disposal facility is Forward Inc. located in Stockton California, a distance of approximately 35 miles from the site. Fees for disposal are set on a case by case basis and range from $25. 00 to $80. 00 per cubic yard of soil . Verification of the levels of petroleum hydrocarbons would be required before acceptance at the facility. It is anticipated that a minimum of one soil sample per 50 cubic yards of soil would be collected and submitted for analysis of TPH and total lead. Analytical costs for would be approximately $7500 . 00 Based on 810 cubic yards of soil $60. 00 per hour for a front end loader, $65. 00 per hour for five 20 yard end dumps, and a 1. 5 hour round trip time for each load, the cost of the haul is estimated to be approximately $5, 850 . Total estimated cost for the disposal of the soils at the Forward Inc. facility could range from $29, 670 . 00 to $74,220 .00. This estimate does not include station down time, permit fees or consulting costs. Amador County landfill is currently in the final stages of obtaining a permit to accept soil containing less than 1000 ppm TPH. The fee for disposal of soil at this facility will be $25. 00 per cubic yard. As this facility is not currently permitted it is presently not a viable option. The Amador County facility is currently scheduled to begin operations within 6 months. The soil boring logs and several representative undisturbed soil samples were submitted to a soils engineering firm in order to evaluate the need for shoring and/or bracing in the proposed tank excavation, during the new tank installation. The conclusions and recommendations regarding slope stability in the new tank excavation are presented in vector Engineering, Inc. ' s (Vector) letter report contained in Appendix D.