Nwql-nfss standards and buffers

The U.S. Geological Survey National Water Quality Laboratory seeks pH buffer solutions, potassium chloride conductivity standards, and deionized water in specified packaging, with quotations due August 12, 2026. Amendment 0001, posted July 31, extended the original July 24 deadline and revised the period of performance to August 24, 2026 through August 23, 2027.

Place of performance is Denver, Colorado. The Government specifies pH buffers at 4.00, 7.00, and 10.00 with accuracy tolerances of 0.01 to 0.02 pH units at 25°C, certified through ISO 17025 accredited laboratories and traceable to NIST standards. Conductivity standards must range from 50 to 25,000 mS/cm with specified measurement accuracies, similarly ISO 17025 accredited and NIST-traceable. All products must demonstrate minimal lot-to-lot variability and arrive with at least twelve months of remaining shelf life. Delivery is required within five calendar days of each order, FOB destination, between 7 a.m. and 2 p.m. local time. The brand name manufacturer specified is Ricca Chemical Company, though offers of equal products meeting salient characteristics are acceptable; the Government reserves the right to conduct pre-award testing of proposed equal products within ten days of notification. Quality assurance testing will be performed on one bottle from each lot at no cost to the Government. Award is based on best value using technical excellence (significantly weighted above price), ability to meet specifications, consistency with historical data, and past performance references. NAICS code is 325998, All Other Miscellaneous Chemical Product and Preparation Manufacturing. This is not a small business set-aside.