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

R -- EVALUATION THE SCALING POTENTIAL OF INORGANIC SPECIES CONTAING ALUMINUM, IRON AND PHOSPHATE POC Sandra Licis, Contracting Officer 513-487-2006 Procurement Abstract 1. The USEPA Water Supply and Water Resources Division, National Risk Management Researh Laboratory requires a contractor to write a Windows-Based Program for determining potential inorganic foulants/scalants on reverse osmosis and nanofiltration membranes treating drinking water. 2. Scope of WOrk, the contractor will evaluate the scaling potential of inorganic species containing aluminum, iron, and phosphate. Also, the effects of chloramines and acid addition will be evaluated. Those species deemed to be potential membrane foulants/scalants will then be written into a Windows-based program for determining potential inorganic foulants/scalants on reverse osmosis and nanofiltration membranes treating drinking water. Other species currently know to be membrane foulants will be included. The program will also contain membrane design calculations including, but not limited to, flow rates, pressure drops, pH changes, and charge balances. When completed, the contractor will supply a final report that will detail the design, operation, and utility of the program. 3. The potential contractor shall demonstrate technical knowledge and experience in drinking water treatment technologies, ability to wirte windows based programs and technical reports. 4. The RFQ shall be issued approximately 1/14/99. This requirement is being solicited as a full and open procurement. Posted 01/07/99 (W-SN286200). (0007)

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