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

B -- COMPUTATIONAL FLUID DYNAMICS MODELING OF GAS PHASE POLLUTANTS IN HUMAN EXPOSURE CHAMBERS SOL XE0090-92 DUE 081198 POC Phyllis Roberts, Contracting Officer, (919) 541-3564 WEB: Click here to visit the site that has information about, http://www.epa.gov/oam/rtp_cmd. E-MAIL: Click here to contact the Contracting Officer via, roberts.phyllis@epamail.epa.gov. The U.S. Environmental Protection Agency's (EPA), National Health and Environmental Effects Research Laboratory, Research Triangle Park, NC intends to award a purchase order on a sole source basis to North Carolina State University (NCSU) in Raleigh, NC for the purchase of services. Services shall be provided for the computational fluid dynamics (CFD) modeling and characterization of the air flow through the Rochester human exposure chambers located at EPA's Human Studies Facility (HSF) in Chapel Hill, NC. The EPA believes NCSU is the only known source capable of meeting our needs for the following reasons: NCSU has performed all previous computer modeling of the HSF chambers and thus, has unique knowledge of their design and operation not available to other sources. NCSU is the only known source that can provide the modeling results on a quick-response basis within the timeframe required by the EPA. The contractor shall perform the following three tasks: (1) Establish complete similarity between the scale model and Chamber 1; (2) Continue computer simulations of air flow and trace gas mixing in a typical small Rochester chamber (Chamber 3) to determine the effects of different chamber inlet velocity profiles due to flow redirection devices (FRDs); and (3) Prepare a comprehensive report summarizing the modeling results. The period of performance is a total of 180 days from date of purchase order. The US EPA anticipates awarding a firm-fixed price purchase order. The SIC code is 8731 with a size standard of not more than 500 employees. The Request for Quotation (RFQ) is expected to be issued on or about 8/4/98 with a quotation due 8/11/98. Response to this synopsis must be in writing and must demonstrate ability to accomplish tasks described above. Submit response to the US EPA, Attention: Phyllis Roberts (MD-33), Contracts Management Division, Research Triangle Park, NC 27711. No telephone or faxed requests will be honored. See Numbered Note(s) 22 and 26. Posted 07/21/98 (W-SN226203). (0202)

Loren Data Corp. http://www.ld.com (SYN# 0009 19980723\B-0002.SOL)