U. S. Environmental Protection Agency, Contracts Management Division (NCCM-SM), Research Triangle Park, NC 27711

B -- DEVELOPMENT AND EVALUATION OF AN INNOVATIVE CHEMICAL REACTION MECHANISM FOR USE IN AIR QUALITY SIMULATION MODELING SOL D500237M1 POC Sue Miller, Contract Specialist, (919) 541-3052/Janice F. White, Contracting Officer, (919) 541-3052. The US Environmental Protection Agency is seeking sources to develop, evaluate, apply, and deliver an innnovative chemical reaction mechanism and associated variable-order numerical solver for use in air quality modeling. This is a continuing effort based on the innovative approach developed under Cooperative Agreement with the University of North Carolina (UNC), School of Public Health. This notice is intended to test the validity of EPA's belief that UNC School of Public Health is the only offeror who can provide this requirement. Under Cooperative Agreement, UNC School of Public Health has developed a unique approach for representing chemistry in resource-intensive air quality simulation models (AQSMs). The anticipated contract will include developing a combined chemical reaction mechanism/numerical solver and evaluating the performance of the mechanism against 300 to 400 experiments that are currently included in EPA's data base of indoor and outdoor smog chamber experiments. This contract will also include performing 25 - 50 smog chamber experiments to acquire data for those VOC-NOx systems for which the existing data are insufficient to adequately test the chemical mechanism. Any interested party who believes they can provide this requirement should submit qualification statements, in writing, to the above address within 15 days from the date of this notice. Firms who have developed concepts for representing chemistry that they feel merit similar or competitive evaluation, must establish the potential merits of their concepts. Firms must have a record of past accomplishments in the development of chemical reaction mechanisms and numberical solvers, the coding of reaction mechanisms into resource-intensive AQSMs, the evaluation of reaction mechanisms against data collected in indoor and outdoor smog chamber facilities, and the execution and analysis of smog chamber experiments. Responses will be viewed as nonresponsive and, therefore, unacceptable unless offerors demonstrate that they currently have a viable approach that allows them to track all of the important individual organic reactants, intermediates and products that participate in photochemical smog formation, including the individual branched and straight-chained alkane species, the internal and terminal olefins (including isoprene), the mono-, di-, and tri-alkylated benzenes, the most commonly emitted terpenes, and all simple aldehydes, ketones, di-carbonyls, carboxylic acids, organic nitrates (including the acylperoxy nitrates), and organic peroxides. The resource requirements of the new mechanism and solver must be such that they do not unduly increase computational demands of sophisticated AQSMs. This requirement is intended to evaluate an existing, but new concept. It is not for development of a new concept. A solicitation is not available. (0045)

Loren Data Corp. http://www.ld.com (SYN# 0021 19950215\B-0008.SOL)