This amendment clarifies the air compressor specifications for USCG MAT Portsmouth: required power is 220V AC, 3-phase, 60 Hz; the 10-minute cylinder fill time is a design guideline rather than a mandatory requirement; operating pressure is defined by the need to fill 3,000 PSI cylinders; and no breathing-air purification system is required. The procurement is a total small business set-aside for commercial products, with award intended as a firm-fixed-price purchase order on an all-or-none basis using best value criteria including specification, price, past performance, and quality. Delivery is FOB Destination to USCG Base Portsmouth, 4000 Coast Guard Blvd, Portsmouth, VA 23703, with required delivery no later than December 31, 2026; earlier delivery is acceptable. Interested vendors must have an active SAM.gov registration and provide