U. S. Environmental Protection Agency, Contracts Management Division (MD-33), Attn: ORDSC, Research Triangle Park, NC 27711

B -- COMPUTATIONAL DYNAMICS MODELING OF PARTICLE PHASE POLLUTANTS IN HUMAN EXPOSURE CHAMBERS SOL X2C026 POC Ramona G. Evans, Contracting Officer (919/541-4749) E-MAIL: Click here to contact the Contracting Officer via, evans.ramona@epa.gov. The U.S. Environmental Protection Agency (EPA) intends to negotiate on a sole source basis with North Carolina State University (NCSU), Fluid Modeling Department, Mechanical/ Aerospace Engineering, Campus Box 7910, Raleigh, NC 27695-7910. The objective of this sole source procurement will be to expand prior computational fluid dynamics (CFD) modeling efforts done by NCSU. Previous work done by NCSU in evaluating air flow distribution problems in an EPA Rochester exposure chamber located at the EPA Human Studies Facility (HSF) on the campus of the University of North Carolina at Chapel Hill (UNC) resulted in the development of a number of specialized models (e.g., human subject breathing patterns) which are both unavailable to other contractors and too costly to reproduce. This continued and expanded effort is to include computer simulations of air flow and aerosol mixing. This work is required to determine the effect of different chamber inlet velocity profiles due to flow redirection devices (FRDs) and aerosol injection schemes on particulate pollutant distribution in the occupied chamber. Four separate tasks are to be performed as part of this effort as follows: Task 1: Evaluation of Unmodified Chamber; Task 2: Modeling of Flow Redirection Devices; Task 3: Evaluation of Pollutant Injection Points; and Task 4: Final Report. The period of performance is expected to be eight months from date of award. EPA believes that NCSU is the only vendor capable of satisfying the complex technical requirements stated above on a quick-response basis within the time frame required by EPA without the costly duplication of prior efforts. No solicitation is available. This notice of intent is not a request for competitive proposals. All interested parties must identify their interest and capability to respond to the requirement or submit proposals within 15 days of the date of this announcement. A determination by the Government not to compete this procurement based upon responses to this notice is solely within the discretion of the Government. Information received will be considered solely for the purpose of determining whether to conduct a competitive procurement. Interested vendors shall: (1) include information on the proposed services which clearly supports the requirements outlined above and; (2) provide itemized pricing that is sufficient to make a determination that competition is feasible. Submit responses to the U.S. EPA, Attn: Ramona G. Evans, ORD Service Center/NHEERL, Contracts Management Division (MD-33), Research Triangle Park, N.C. 27711. No telephone requests will be honored. See also numbered Note 26. Posted 01/06/00 (W-SN413909). (0006)

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