Coastline LTD.

Coastline LTD., a for-profit Subchapter S corporation headquartered in Alexandria, Virginia, delivers industrial water treatment chemicals, HVAC chemical services, and facility infrastructure maintenance to federal installations as a prime contractor (99% of recent awards) across defense and civilian agencies, predominantly under total small business set-asides. The vendor competes across 37 distinct federal agencies with a customer base anchored by Army Installation Management Command Southwest and Northeast Regions, General Services Administration, the Smithsonian Institution, and Air Education and Training Command.

The top five customers by combined potential value account for 79% of recent awards. Army Southwest Region leads with 31 awards valued at $18.8 million, followed closely by Army Northeast Region at 15 awards for $18.2 million; GSA Federal Acquisition Service places 39 awards worth $18 million; Air Education and Training Command issued 11 awards totaling $11.6 million; and United States Marine Corps awarded 20 orders for $4.9 million combined potential value. The Smithsonian Institution represents the highest award count at 49 orders but carries only $3.8 million in combined potential value—a concentration skew toward small individual task orders. Coastline's work splits between defense installations (Army, Navy, Air Force, Marine Corps) and civilian-customer facility maintenance (Smithsonian, National Institute of Standards and Technology, Bureau of Engraving and Printing, Justice Department).

Capability footprint centers on water treatment chemicals, cooling tower maintenance and cleaning, boiler and closed-loop system chemical treatment, HVAC water testing, water softener installation and repair, reverse osmosis system replacement, and legionella testing at federal facilities. Recent representative prime work includes a $10.58 million definitive contract with Army Southwest Region for HVAC chemical water treatment services at Fort Hood, Texas, running through August 2027; a $9.6 million definitive contract with Army Northeast Region for five years of chemical supplies at Fort Detrick, Maryland through October 2028; a $1.187 million definitive contract with Air Mobility Command for industrial water treatment chemicals and technical services at Joint Base McGuire-Dix-Lakehurst, New Jersey through November 2030; and a $419.353 million delivery order with the Smithsonian Institution for institution-wide water treatment repairs across Washington, D.C. and Suitland, Maryland through December 2027.

Vehicle position includes standing seats on GSA Federal Acquisition Service contracts (22 task orders, $3.1 million combined potential value under the Multiple Award Schedule) and agency-specific indefinite delivery contracts. Coastline holds a single-award IDC with the Smithsonian Institution (ceiling $1.003 million, ultimate completion January 2027) and a single-award Naval Facilities Engineering Command IDC for HVAC chemical services at Dahlgren Naval Support Facility (ceiling $1.245 million, completion April 2027). Additional active IDCs with Army Installation Management Command Southwest and Northeast Regions and Defense Logistics Agency Land and Maritime drive recurring task-order volume.

Activity trajectory shows volatility: nine awards in 2022, thirteen in 2023, four in 2024, eleven in 2025, and three awards through mid-2026 (as of the source date). Six awards with ultimate completion dates in the next twenty-four months carry combined potential value of $12.1 million and face recompete exposure. SCI-reported invoiced revenue totals $71 thousand across FY2024, derived from a single contract with 24 contractor hours self-performed at a derived rate of $2,947.25 per hour; FY2025 SCI records show no invoiced amount. This minimal SCI footprint reflects Coastline's business model as a chemicals and small-scale maintenance services vendor rather than a labor-hour intensive prime, and the SCI dataset captures only contracts above the $150,000 threshold. The vendor operates as a 99% prime footprint with negligible subcontractor engagement across documented awards. Recent sub-award activity includes a November 2025 task order under Rivanna Station Base Operations Support Services IDIQ as a subcontractor; this represents a departure from Coastline's established prime-only posture. NAICS concentration clusters around chemical manufacturing (129 awards under NAICS 325998) and water supply systems (54 awards), with PSC codes predominantly in chemicals and miscellaneous chemical specialties.