U.S. Environmental Protection Agency, 26 W. Martin Luther King Dr., Cincinnati, OH 45268

B -- STUDY OF THE KINETICS OF A HIGH RATE SETTLING PROCESS SOL PR-OH-97-00370 POC Raoul Scott (513)366-2071 E-MAIL: Contracting Officer, scott.raoul@epamail.epa.gov. The U.S. EPA National Risk Management Research Laboratory's Urban Watershed Management Branch, located in Edison, New Jersey is soliciting proposals to conduct a bench-scale study of high rate, microcarrier-enhanced sedimentation process for removing SS from urban stormwater. Requirements to be performed includes detailed mechanistic studies to determine the kinetics of SS-MC flocculation, coagulation, and sedimentation processes. The experiments shall be designed to determine the number of independent kinetic units per unit volume as a function of time in stormwater samples. Light scattering, that is capable to analyze SS size distributions of 0.04 to 2000 m, is suited to conduct the kinetic studies since experimental SS (colloids) can be interpreted in terms of the number and size of the scattering centers. A project report shall be prepared to present all relevant information, including, but not be limited to, detailed procedures and methods for conducting experiments, experimental QA/QC, and methods for data analyses and interpretation of final results. The report shall be comprehensive and technically accurate, and it will be undergo critical scientific peer-review. The proposed acquisition will be processed as a Request for Quotation (RFQ)using FAR Part 13 -- Simplified Acquisition procedures, which will result in a firm fixed price contract. All requests for RFQ: PR-OH-97-00370 must be in writing. No telephone requests will be accepted. Facsimile is acceptable. The facsimile number is (513) 366-2004. The applicable Standard Industrial Code (SIC) is 8711. (0160)

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