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

A -- EVALUATION AND ADAPTATION OF MODELING APPROACHES FOR AQUATIC OIL SPILLS SOL UKE062 DUE 092099 POC Pamela E. Smith (919) 541-0635, Purchasing Agent THIS IS A COMBINED SYNOPSIS/SOLICITATION FOR COMMERCIAL ITEMS PREPARED IN ACCORDANCE WITH THE FORMAT IN SUBPART 12.6, AS SUPPLEMENTED WITH ADDITIONAL INFORMATION INCLUDED IN THIS NOTICE. THIS ANNOUNCEMENT CONSTITUTES THE ONLY SOLICITATION; QUOTES ARE BEING REQUESTED AND A WRITTEN SOLICITATION WILL NOT BE ISSUED. The solicitation number is UKC034 and the solicitation is being issued as a Request for Quote (RFQ). The solicitation document and incorporated provisions and clauses are those in effect through Federal Acquisition Circular 97-13. The Environmental Protection Agency (EPA) anticipates that the contract will be awarded as a result of full and open competition. A firm-fixed-price purchase order is anticipated to result from the award of this solicitation. The associated Standard Industrial Code (SIC) is 8731. This procurement requires the contractor to provide Evaluation and Adaptation of Modeling Approaches for Aquatic Oil Spills: U.S. Environmental Protection Agency (EPA), is developing models for application to environmental problems associated with accidental spills and releases of petroleum hydrocarbons and other multicomponent oils (collectively denoted "oils" hereafter). The configuration of floating oil bodies or slicks is of fundamental concern for developing models. The configuration depends at least upon the physical properties and quantity of the spilled oil, the rate of release to the water, and the effects of wind and currents on the slick. In particular, oil volume, the oils/water interfacial tension, oil surface tension, and water surface tension determines, in equilibrium systems, the thickness of a floating oil slick, which may range from very thin to several feet thick, depending upon the circumstance. Some common models, however, have been developed which ignore the effects of surface and interfacial tension and assume the slick is thin. The purpose of the requested work is to evaluate the feasibility of adapting and existing models to include all necessary phenomena. Task 1.) Review the literature on oil slick modeling with particular emphasis on the theories underling two simplified models: the ADIOS model (National Oceanic and Atmospheric Administration, Hazardous Materials Response and Assessment Division, Seattle, Washington, 1994) which ignores surface and interfacial tension effects; and the Model developed for static conditions by Ross ("An Algorithm for Computing the Shapes of Floating Fluid Lenses", Journal of Colloid and Interfacial Science, Vol 154, No. 1, 66-76, Nov 1992). Other supporting reference should be consulted as necessary. Prepare a report describing the results of the review. The report shall include discussion of the conceptualization of each model described above, and the mathematical equations and underlying theories. This report shall be supplied in hard copy and electronic format. WordPerfect shall be used for the electronic copy, unless prior agreement with EPA is obtained. Task 2.) Develop an approach to simulating floating oil that is similar to both the ADIOS and Ross methods, but includes the important gestures of both. The goal is to produce an approach that would be amenable to analytic or semi-analytic solution techniques. A semi-analytic approach is anticipated to be one where the governing equations could be solved numerically an ordinary differential equation solver. The following shall be added to the task 1 report: a description of the proposed approach, including the conceptualization of the problem, the mathematical equations, and the proposed solution technique. Sufficient detail shall be included so that the model approach can be incorporated into an existing EPA model. This report shall be supplied in hard copy and electronic format. WordPerfect shall be used for the electronic copy, unless prior agreement with EPA is obtained. EPA shall supply written comments on the task 11 and task 2 reports within 15 business days of their receipt. Contractor shall reconcile all comments and make necessary changes to the report before final acceptance by EPA. Selection Criteria: 1.) Prior experience in literature review and developing models of fluid and separate phase oil flow. 2.) Prior experience in developing analytical and semi-analytical solutions for fluid flow problems. 3.) Proposed Method of attach for developing solution strategy. 4.) Past Performance -- provide 3 references for work of a similar nature. Award will be made to the lowest priced offer meeting all of the technical requirements. The following FAR provisions apply to this solicitation: 52.212-1, Evaluation-Instructions to Offerors-Commercial; 52.212-2, Evaluation-Commercial Item. Evaluation criteria to be included in paragraph (a) of provision 52.212-2 are as follows:(I) technical capability to meet the Government requirements; (ii) past performance;(iii) price, in decreasing order of importance. Technical and past performance, when combined, are significantly more important than price. All offerors are to include with their offers a completed copy of provision 52.212-3, Offeror Representations and Certifications-Commercial Items (can be found at http://www.epa.gov/oam/rtp_cmd). The following FAR clause applies to this acquisition: 52.212-4, Contract Terms and Conditions-Commercial Items. The following additional FAR clauses which are cited in clauses 52.212-5 are applicable to the acquisition: 52.203-6, Restrictions on Subcontractor Sales to the Government, with Alternate I; 52.203-10, 52.222-26, Equal Opportunity, 52.222-35, Affirmative Action for Special Disabled and Vietnam Era Veterans; 52.222-36 Affirmative Action for Handicapped Workers; 52.222-37, Employment Reports on Special Disabled Veterans and Veterans of the Vietnam Era; 52.222-41, Service Contract Act of 1965, As Amended. Cost and technical information should be submitted in separate proposals. Please submit two copies of the technical proposal and two copies of the cost proposal to Pamela E. Smith, Purchasing Agent, U.S. Environmental Protection Agency, MD-33, Research Triangle Park, NC 27711. Courier Delivery Address is: U.S. Environmental Protection Agency, Receptionist-Administration Bldg. Lobby, Attn: Pamela E. Smith, 79 Alexander Drive, Research Triangle Park, NC 27709. All offers are due by September 20, 1999, 4:00 p.m. ET. No telephonic or faxed requests will be honored. Posted 09/02/99 (W-SN376083). (0245)

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