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Himanshu Mehta, P . E . Geosyntec ° 7 May 2008 consultants Page 4 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