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Himanshu Mehta, P.E. 7 May 2008 Page 4 Geosyntec consultants costing purposes, HCC has assumed that the fueling area will be constructed as a 48 -ft long by 10 -ft wide by 12 -in, thick concrete, rebar reinforced pad (No. 5 rebar 12" on center each way), with minimal grading and/or backfilling in the construction area. Once the concrete has set (minimum of 7 days), the double -walled AST will be set on the concrete pad and bolted in place. Yellow painted bumper posts will be installed around the concrete pad, as warranted, and the fuel dispenser and card reading system will be installed. HCC has also recommended the installation of a 6 ft by 8 ft handy house/storage shed to house the card reader and supplies which has been included in this proposal. The shed would be placed on a 4 -inch thick concrete pad. Task Assumptions: • No costs are included for the provision of electrical service to the concrete slab. • Dimensions of concrete pour will not exceed 10 -ft by 48 -ft by 124n. thick. • No costs are included for the preparation, design, or permitting related to any potential stormwater requirements based upon the construction of impervious surface areas. • No costs are included for the construction of any paving/curbing, access roadway construction etc. Costs for this element of the project can be secured from subcontractors, if warranted, upon completion of the fueling area design sheet drawings. Task 4 — IRC Landfill Existing AST Closure Task 4 includes costs associated with the closure, in accordance with the requirements of Chapter 62-761, FAC, of the existing approximately 8,000 -gallon steel AST located at the landfill. HCC will mobilize to the site, disconnect all piping from the AST, plug openings and install dry ice. The AST will then be lifted from the concrete support structures with a crane and set upon the ground. The AST will be opened, cleaned, and any sludge within the AST drummed for proper disposal. The AST will be transported to the appropriate location at the landfill for disposal. Pursuant to the requirements of Chapter 62-761, FAC, Geosyntec personnel will perform five hand auger soil borings to the groundwater table and perform OVA meter screening of the vadose zone soils. Up to two soil samples will be collected for laboratory analyses for volatile organic aromatics (VOAs) by EPA Method 8021, polynuclear aromatic hydrocarbons (PAHs) by EPA Method 8310, and total recoverable petroleum hydrocarbons (TRPH) by FL -PRO. One temporary monitoring well will be installed, and groundwater samples will be collected from the monitoring well for VOAs, PAHs, and TRPH by the methods previously indicated. Budget is included for the sampling and analysis of the drum of sludge (VOAs, TCLP, RCRA Metals, and TRPH) and assisting IRC SWDD with the disposal of IRC SWDD's AST sludge. XR08051 R/CCR08045 R. DOC engineers I scientists I innovators