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

B -- DEVELOPMENT OF HAPEM-MS3 ME FACTORS DUE 082698 POC Clarence Roberts (919) 541-2344 This synopsis replaces the synopsis by the same title posted 8/11/98. The U.S. Environmental Protection Agency (EPA) intends to negotiate a sole source agreement with TRJ Environmental 713 Shadylawn Road, Chapel Hill, NC 27514. TRJ Environmental developed the model and therefore, is uniquely qualified because of their knowledge and demonstrated expertise with the HAPEM-MS3 model and previous development of ME factors. The contractor shall perform the technical tasks necessary to develop the appropriate ME factors to access potential human exposure with the HAPEM-MS3 model from up to 40 hazardous air pollutants (HAPs). Specifically, the Vendor shall perform the following tasks: Task 1, The Vendor shall submit a work plan outlining their technical approach to the statement of work. Task 2. The Vendor shall conduct a literature search of past and ongoing efforts relating to indoor/outdoor concentration relationships for HAPs. The search shall include a review of the ORD effort the National Human Exposure Assessment Survey (NHEXAS). Task 3. Based upon the information developed in Task 2, the Vendor shall develop appropriate ME factors for up to 40 HAPs. The PM shall provide the Vendor with the list of HAPs. Where possible the Vendor may group HAPs into appropriate categories based upon the physical characteristics and expected concentration gradient behavior of the chemical. Further the Vendor shall make suggestions as to the number of ME locations appropriate for each pollutant. In developing the factors the Vendor shall address any known or potential indoor sources of the HAP as well as the degree of uncertainty associated with each factor. The EPA anticipates awarding a Simplified Acquisition for this requirement. All responsible sources may respond by submitting a written narrative statement of capability within 15 days of this notice to Clarence Roberts at the above address for consideration by the Agency. Responses must include detailed technical information and other technical literature demonstrating the ability to meet these requirements. Responses shall also include itemized pricing that is sufficient to make a determination of what competition is feasible. If no affirmative responses are received within 15 days of this notice to determine whether a qualified source is more advantageous to the government, an order will be placed with TRJ Environmental. Submit response to the U.S. EPA, Attention: Clarence Roberts (MD-33) Contracts Posted 08/13/98 (W-SN236465). (0225)

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