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CD Smith Mr. Himanshu Mehta, P.E. March 1, 2018 Page 2 pump station. The work includes duplex pumps, concrete wetwell, concrete slab and driveway, valves, and piping. ■ Water Main Extension and Hydrant - The work includes all pipes, valves, fitting, hydrant, and ancillary components for the water main extension. Work also includes a water line to the LCS pump station and hose bib. ■ Electrical and Instrumentation - The work includes all components required for electrical and instrumentation to the LCS and LDS pump stations and electrical connections for the air compressors including control panels, grounding, service and distribution, concrete encased ductbank, site lighting, handholes, conduits, disconnects and connections, circuits, and ancillary components. Also included is a 20 -kW diesel genset for the LCS pump station. ■ Segment 2 Partial Closure - The work for the Segment 2 Partial Closure includes the construction of a closure cap liner system, stormwater collection, landfill gas system expansion and improvements, and associated site improvements. The proposed Segment 2 partial closure system is comprised of 6 inches of cap foundation layer, a gas venting geocomposite, 40 -mil linear low-density polyethylene (LLDPE) liner, stormwater geocomposite, 18 inches of protective soil, 6 inches of topsoil, and sod. All existing downcomers will be replaced and upsized to 24 -inch corrugated HDPE pipe to be capable of handling the stormwater flows. The landfill gas system will be expanded in the closure area and will include additional vertical collection wells, horizontal collectors, new headers, new air and force main piping, and new well dewatering pumps. ■ Segment 2 Access Road Extension and Improvements - The work includes a new landfill access road on top of the new Segment 2 Partial Closure area which will connect to the existing access road on the Segment 2 north sideslope. The work also includes resurfacing of the existing access road along the entire north sideslope of Segment 2. • Air Compressor System - The work includes a turn -key air compressor system and metal building to be installed on the existing flare slab. The system will include air compressors, air dryers, and all required piping and components. DERIVATION OF OPINION OF THE PROBABLE COST OF CONSTRUCTION The prices for each item in this OPCC were prepared by CDM Smith. The material prices were obtained from recognized suppliers, wherever possible, and/or review of recent bids, and such prices reflect delivery to the project site. CDM Smith has reviewed recent bids within the last two years for St. Lucie County and Pinellas County for landfill expansions and closures and find that the OPCC is comparable to these bid prices. 65 82193 door