The University of California, Riverside Environmental Chamber Data Base for Evaluating Oxidant Mechanisms: Indoor Chamber Experiments Through 1993

Data collected in the environmental chambers operated by the University of California, Riverside, have been documented and are now available for use by the scientific community for evaluating photochemical mechanisms for urban and regional airshed models. The compiled data include experiments performed in the Statewide Air Pollution Research Center (SAPRC) Evacuable Chamber (EC), Indoor Teflon Chamber #1 (ITC), Indoor Teflon Chamber #2 (ETC), Dividable Teflon Chamber (DTC), and Xenon arc Teflon Chamber (XTC) between September of 1975 through November of 1993. The experiments contained in this data base are listed and summarized, the facility and procedures employed are described, and the analytical and monitoring methods and their calibration data and associated uncertainties are documented. In addition, input data needed to conduct model simulations of the experiments in the data base are included, and the format of the data sets, which are available on the Internet by anonymous FTP, are described. Also available on the Internet are files that permit modeling of the experiments in the data base using the SAPRC-90 and the Carbon Bond IV chemical mechanisms. Recommendations are made concerning the steps that need to be taken before using these data to evaluate chemical mechanisms. This Project Summary was developed by EPA’s National Exposure Research Laboratory, Research Triangle Park, NC, to announce key findings of the research project that is fully documented in a separate report of the same title (see Project Report ordering information at back).