The U.S. Geological Survey requires water quality sampling services to support environmental permitting in Bayron, Puerto Rico. The contract has a one-year period of performance from the award date, with no option periods, and the anticipated award date is September 1, 2026. This is a small business set-aside under the testing laboratories NAICS code, with a $19 million size standard. Offerors must be registered in SAM under the applicable NAICS code at the time of award. All responsible sources may submit a quotation for consideration.