Wastewater treatment plant testing

The National Park Service Midwest Region is soliciting quotes for Wastewater Treatment Plant Testing Services at Buffalo National River in Arkansas under solicitation number 140P6426Q0053. The contractor will be responsible for providing all labor, materials, and equipment necessary to conduct monthly water quality sampling and laboratory analysis at three wastewater treatment facilities, including the Buffalo Point Upper Plant, Buffalo Point Lower Plant, and Tyler Bend Plant. Key contract requirements include compliance with 40 CFR Part 136 standards, use of an Arkansas Department of Environmental Quality (ADEQ) certified or approved laboratory, sample collection conducted onsite by the contractor, and monthly reporting of data to the park Contracting Officer's Representative. The contractor must provide samples at the Upper Plant on a 12-month schedule and at the Lower Plant on a 9-month schedule (March through November), with Tyler Bend requiring annual effluent and soil analysis testing. Testing parameters include water quality metrics such as pH, dissolved oxygen, biochemical oxygen demand, total suspended solids, ammonia nitrogen, E. coli, total phosphorus, and other parameters specified in the Statement of Work. Quotes are due by 12:00 PM EDT on May 5, 2026, submitted via email to colette_riegelmayer@ios.doi.gov, with questions accepted only until April 27, 2026. Award is anticipated on or before May 10, 2026, with contract performance commencing May 15, 2026.

This is a 100% total small business set-aside under NAICS code 541380 (Testing Laboratories and Services) with a size standard of $19 million; no incumbent contractor is identified in the solicitation materials. Prospective offerors must obtain a Unique Entity Identifier (UEI), register in the System for Award Management (SAM), and maintain active small business status through quote submission, award, and throughout the entire contract performance period. The contract is structured as a firm-fixed price commercial award with a base year running from May 15, 2026 through May 14, 2027, plus four optional renewal years, though specific dollar values are not provided in the pricing schedule template. A mandatory site visit is scheduled for April 21, 2026 at 1:00 PM CT at Buffalo Point Contact Station in Yellville, Arkansas, and offerors must submit required documentation including a completed price schedule, a capabilities statement or project narrative (two-page limit), SAM.gov documentation confirming small business status, and three prior experience references from similar projects completed within the past five years. Performance will take place at three wastewater treatment facilities within Buffalo National River in Yellville, Arkansas, with work conducted during standard business hours (6:30 a.m. to 5:00 p.m., Monday through Friday) unless prior approval is obtained.