Excavation for Three Trenches. Inactive Total Small Business Set-Aside (FAR 19.5) Notice ID:140G0320Q0167 Excavation for Three Trenches. Department/Ind.Agency Subtier Office INTERIOR, DEPARTMENT OF THE US GEOLOGICAL SURVEY OFFICE OF ACQUISITON GRANTS NAICS 238910 - Site Preparation Contractors PSC SITE PREPARATION Data sourced from SAM.gov. View Official Posting »