The U.S. Army Corps of Engineers (USACE) Baltimore District is considering a re-procurement of an indefinite-delivery indefinite-quantity (IDIQ) for Fluorosilicic Acid 25% (Bulk Liquid) at the Washington Aqueduct that will meet the requirements of ANSI/AWWA Standard B300 and shall be certified to meet NSF/ANSI Standard 60. The Single Award Task Order Contract (SATOC) would have a five-year ordering period. The NAICS code for this procurement is 325180 - Other Basic Inorganic Chemical Manufacturing which has a small business size standard of 1,000 employees.