The Department of Defense, through the U.S. Army Corps of Engineers, is soliciting proposals for swimming beach water quality testing at Hop Brook Lake in Middlebury, CT. The project requires contractors to provide all necessary labor, equipment, and materials for weekly sampling of beach water, specifically testing for E. coli and cyanobacteria, including cyanotoxins Microcystins-LR and Anatoxin-a, with strict adherence to safety and health regulations. This procurement is set aside for small businesses under NAICS code 541380, with a performance period extending through April 30, 2026, and the possibility of two option years. Interested vendors must have an active registration in SAM.gov and submit their proposals by April 24, 2025, at 2:00 PM Eastern Time; inquiries can be directed to Jennifer M. Samela at jennifer.m.samela@usace.army.mil or by phone at 978-318-8324.