National Institutes of Health, Division of Procurement, Acquisition Branch C, Building 13, Room G800, 9000 Rockville Pike, Bethesda, MD 20892

Z -- TO PROVIDE REPAIR AND IMPROVEMENT CONSTRUCTION TO WASTE WATER PLANT SOL 263-95-B(CD)-0240 POC Milton Timmons, Contracting Officer, (301) 402-2163. Pre-Solicitation Notice: The National Institutes of Health (NIH) seeks to identify prospective (SIC Code 1623) to provide repair and improvement construction services to the Wastewater (Sewage) Treatment Plant at the NIH Animal Center in Poolesville Maryland. These services, entitled Phase II Improvements, are planned to consist of a single contract with an estimated construction cost of between one (1) million and five (5) million dollars. The existing wastewater treatment plant utilizes a waste activated sludge secondary treatment process, with effluent filtration and disinfection. The existing plant consists of the following unit operations: a grit removal system; a lime feeding station; 27,000 gallon influent flow equalization basin, two aeration basins, each 58,000 gallon capacity and sock-type fine bubble air diffusers; two secondary clarifiers, each with a 32,000 gallon volume; and two aerobic digestors, 70,000 and 39,000 gallons each with coarse bubble air diffusers, operated as a two-stage digestion process. The aforementioned unit operations area arranged in contiguous compartments in a reinforced concrete basin structure. One of the aeration basins has been connected to the flow equalization basin for increased equalization capacity, therefore only one 58,000 gallon aeration basin is available for use as an activated sludge treatment basin. Separate buildings house (a) the two Microfloc effluent filtration units (b) the chlorination/dechlorination basin (c) the boiler/heat exchanger; and (d) the vacuum-assisted sludge dewatering system and equipment. The plant also has two 1.5 million gallon lagoons for diverted influent. Pre-design analysis determined that the basic tankage and layout of the existing plant is conducive to modifications which will convert the plant to a nitrification plant with basic treatment capacity of 100,000 gallons per day. The proposed Phase II Improvements will therefore consist of the construction of: a new equalization tank with twin 50,000 gallon basins; a new lime/blower building atop the equalization tank; conversion of the two existing aeration basins to nitrification basins; new blowers for the aeration/nitrification basins, a new filter building and filters, and a new chlorine/sulphur dioxide storage/feeder building. The existing and proposed nitrification plant will require extensive piping and pumping changes, the inclusion of sensor probes, the automatic control of many of the different processes, provision of a data acquisition system, and expansion of the emergency electrical power distribution system to incorporate the new featutes of the plant. All of the above work must be completed within 390 calendar days after Notice to Proceed and without interrupting the normal operation of the existing plant. Eligibility shall be determined by two factors as follows: (1) Bonding: Eligible contractors shall provide evidence of the capability to secure the required bonding (minimum three(3) million dollars). If bonding is to be provided by a surety company, the required evidence shall be in the form of a letter from the surety stating that categorically the proposed contractor is bondable and that they (the surety) would be willing and able to bond the contractor should the said contractor be awarded the contract. If individual sureties are proposed as the bonding instrument said individuals shall provide written assurance that they shall serve as an individual surety to the proposed contractor and pledge assets in strict accordance with FAR requirements for individual sureties (FAR 28.203-1). If bonding is to be provided by any other options listed in FAR 28.204, the contractor shall state categorically in writing that it guarantees it will provide the sureties in the amounts and within the time frame stipulated in the solicitation documents. 2) Experience: Eligible contractors shall provide evidence of successful completion within the past seven(7) years of at least one project of similar size, complexity, and nature. Evidence shall consist of a synopsis of the work performed, the contractors role, construction cost, project duration, names and current telephone numbers of the owner and point (s)-of-contact. (0191)

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