Work is comprised of four (4) contracts: contract no. 1 - base bid - general construction, contract no. 2 - mechanical construction, contract no. 3 - electrical construction, contract no. 4 - combined general, mechanical, and electrical construction, one (1) alternate to contract no. 1: contract no. 1 - alternate no. 1 - existing water treatment plant demolition - adder, and one (1) alternate to contract no. 4: contract no. 4 - alternate no. 1 - existing water treatment plant demolition - adder: individual bids will be received for each contract as well as contract no. 4 - combined general, mechanical, and electrical construction. The owner will not accept a combined bid unless that bid is lower than the combined total of the lowest and best bids for the separate contracts. Contractor-s bidding contract no. 1 and/or contract no. 4 must bid base bid and all associated alternates to be considered for contract award. Contract no. 1 or contract no. 4, if awarded, will award the base bid with or without any combination of the alternates. The work for each contract and alternate is generally described as follows: contract no. 1 - base bid - general construction:base bid generally consists of the work required to furnish and install a new 2,000 gallon per minute (gpm) groundwater treatment plant (wtp) utilizing aeration, plate settlers, and horizontal pressure filters for iron and manganese removal. The base bid also includes modifications to the existing west pump station (wps). Work for the new wtp generally includes the following: furnishing and installation of precast concrete water treatment plant building and below grade cast in place concrete basins; furnishing and installation of equipment including: one (1) aerator, two (2) inclined plate setters, two (2) horizontal pressure filters, six (6) vertical turbine pumps, one (1) split coupled end suction pump, all associated piping, valves, appurtenances, and chemical feed and storage equipment; furnishing and installation of six (6) submersible well pumps, 6" and 12" raw water pipelines, and 8" and 12" finished water transmission and all associated valves, pigging stations, and appurtenances; pipeline cleaning of existing 12" raw water for future potable water use; excavation and construction of one (1) backwash waste pond; furnishing and installation of all exterior civil improvements including concrete, site grading, septic holding tank, site restoration, and all associated work and materials as indicated in the drawings and specifications. Work for the existing WPS generally includes demolition of existing piping, treatment equipment, and associated appurtenances as indicated in project plans; installation of (1) magnetic flow meter, furnishing and installation of one (1) jockey pump, process piping, and all associated appurtenances required to modify existing piping; furnishing and installation of door improvements; and all other associated work and materials as indicated in the drawings and specifications. Contract no. 1 - alternate no. 1 - existing water treatment plant demolition - adder: work generally consists of the following: within the WPS: the demolition of remaining process piping, treatment equipment, and appurtenances; preparation and coating of all walls and floor; and all other work as indicated within the drawings and specifications. Contract no. 2 - mechanical construction: work generally consists of the following: in the new WTP work generally includes: furnishing and installation of air conditioning units, underfloor plumbing, process/domestic water plumbing, air conditioning equipment, fans, louvers, dampers, dehumidifiers, electric water heater, fire suppression system, duct work, piping, all other associated piping, insulation, grilles, and all other associated work and materials as indicated in the drawings and specifications. In the WDS work generally includes: demolition of equipment required for the HVAC, dehumidification, and plumbing; furnishing and installation of new split air conditioning unit; and all other associated work and materials as indicated in the drawings and specifications. Contract no. 3 - electrical construction:work generally consists of the following: in the new WTP work generally includes: furnishing and installation of transformer, service entrance automatic transfer switch, diesel driven generator, switchboard, motor control centers, panelboards, LV transformers, control panels and instrumentation, network panel, vfds, interior and exterior lighting, electric unit heaters, and all other electrical equipment; furnishing and installation of conduit, wire, cable trays, incidentals, appurtenances and all other associated work and materials as indicated in the drawings and specifications. In the WDS work generally includes: demolition of indicated existing electrical equipment, conduits, and lighting; furnishing one (1) flow meter and one (1) flow transmitter; furnishing and installation of: new electrical conduit, new lighting, new receptacles, new electric unit heaters, and four (4) new (VFDS); incidentals, appurtenances, and all other associated work and materials as indicated in the drawings and specifications. Contract no. 4 - combined general, mechanical, and electrical construction:work consists of the work described under contract no. 1 - base bid - general construction, contract no. 2 - mechanical construction, and contract no. 3 - electrical construction. Contract no. 4 - alternate no. 1 - existing water treatment plant demolition - adder:work consists of the work described under contract no. 1 - alternate no. 1 - existing water treatment plant demolition - adder.
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