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Douglas Roderick . November 20, 1998 Page 2 included information on equipment it would provide The following below is an evaluation of the proposals Flour Daniel GTI The total cost for services as specified in its proposal is $227,424 As indicated above, this cost is based on one year of operation and reporting Prorated cost for two years of services is $267,743 without increasing of hourly rates However, Fluor Daniel GTI terms and conditions section of the proposed contract has a provision for the rates increase in the beginning of each year A 5% increase for the second year would result in a contract cost of$269,759 The Fluor Daniel GTT proposal allocates $62,850 for a 350 scfm Baker Furnace Thermal Oxidizer and 30 scfm @20 psig Air Sparge Compressor Manufactured by Compair Attached is a cost estimate for 300 scfm and 400 scfm of Thermal Oxidizers based on the price sheet provided by Baker Furnace The total price includes all options specified by Fluor Daniel GTI plus taxes, shipment, and mark-up of 15% as specified in the proposal The air compressor specified by Fluor Daniel GTI does not corresponds to the CAP, which calls for a minimum 5 scfm/well (assuming 8 wells) and discharge pressure of 30 prig This discharge pressure is higher than usually applied in air sparging The higher pressure is required because a zone to be treated (where free-product is apparently trapped) is located at least 30 feet below the groundwater level Thirty (30) feet of water column corresponds to 13 psig At least 10 prig should be added for pressure loss in branched piping and associated fittings Therefore, the Fluor Daniel GTI specified equipment cost should be increased by $13,000 which would bring the cost to $282,750 No natural gas supply line is provided If the line can be connected to the existing gas line in the building, the additional cost should not exceed $1,500 If the existing supply line can not provide 5 therms/hr of natural gas, a separate hne should be installed This cost is estimated at about $8,000 Groundwater monitoring cost of$14,000, which is not a part of the CAP, is included in the proposal cost It has been assumed that the recent acquisition of Fluor Daniel GTI by IT Corporation will not change the proposed cost It is unclear, however, whether the standard terms of the Fluor Daniel GTI contract would be altered TerraVac The proposed cost is $346,440, which includes two years operation and reporting Terra Vac proposes to lease a 600-scfm regenerative oxidizer which has much higher capacity than that . specified in the CAP Therefore, a significant increase in the utility cost is expected Further, it is possible that the oxidizer is heated with electric power, which will require supplying additional 30 kW