| PSC | Description
|
| Z1AA | Maintenance Of Office Buildings |
| Z1AB | Maintenance Of Conference Space and Facilities |
| Z1AZ | Maintenance Of Other Administrative Facilities and Service Buildings |
| Z1BA | Maintenance Of Air Traffic Control Towers |
| Z1BB | Maintenance Of Air Traffic Control Training Facilities |
| Z1BC | Maintenance Of Radar and Navigational Facilities |
| Z1BD | Maintenance Of Airport Runways and Taxiways |
| Z1BE | Maintenance Of Airport Terminals |
| Z1BF | Maintenance Of Missile System Facilities |
| Z1BG | Maintenance Of Electronic and Communications Facilities |
| Z1BZ | Maintenance Of Other Airfield Structures |
| Z1CA | Maintenance Of Schools |
| Z1CZ | Maintenance Of Other Educational Buildings |
| Z1DA | Maintenance Of Hospitals and Infirmaries |
| Z1DB | Maintenance Of Laboratories and Clinics |
| Z1DZ | Maintenance Of Other Hospital Buildings |
| Z1EA | Maintenance Of Ammunition Facilities |
| Z1EB | Maintenance Of Maintenance Buildings |
| Z1EC | Maintenance Of Production Buildings |
| Z1ED | Maintenance Of Ship Construction and Repair Facilities |
| Z1EE | Maintenance Of Tank Automotive Facilities |
| Z1EZ | Maintenance Of Other Industrial Buildings |
| Z1FA | Maintenance Of Family Housing Facilities |
| Z1FB | Maintenance Of Recreational Buildings |
| Z1FC | Maintenance Of Troop Housing Facilities |
| Z1FD | Maintenance Of Dining Facilities |
| Z1FE | Maintenance Of Religious Facilities |
| Z1FF | Maintenance Of Penal Facilities |
| Z1FZ | Maintenance Of Other Residential Buildings |
| Z1GA | Maintenance Of Ammunition Storage Buildings |
| Z1GB | Maintenance Of Food Or Grain Storage Buildings |
| Z1GC | Maintenance Of Fuel Storage Buildings |
| Z1GD | Maintenance Of Open Storage Facilities |
| Z1GZ | Maintenance Of Other Warehouse Buildings |
| Z1HA | Maintenance Of Government-owned Contractor-operated (goco) R&d Facilities |
| Z1HB | Maintenance Of Government-owned Government-operated (gogo) R&d Facilities |
| Z1HC | Maintenance Of Government-owned Contractor-operated (goco) Environmental Laboratories |
| Z1HZ | Maintenance Of Government-owned Government-operated (gogo) Environmental Laboratories |
| Z1JA | Maintenance Of Museums and Exhibition Buildings |
| Z1JB | Maintenance Of Testing and Measurement Buildings |
| Z1JZ | Maintenance Of Miscellaneous Buildings |
| Z1KA | Maintenance Of Dams |
| Z1KB | Maintenance Of Canals |
| Z1KC | Maintenance Of Mine Fire Control Facilities |
| Z1KD | Maintenance Of Mine Subsidence Control Facilities |
| Z1KE | Maintenance Of Surface Mine Reclamation Facilities |
| Z1KF | Maintenance Of Dredging Facilities |
| Z1KZ | Maintenance Of Other Conservation and Development Facilities |
| Z1LA | Maintenance Of Airport Service Roads |
| Z1LB | Maintenance Of Highways/roads/streets/bridges/railways |
| Z1LC | Maintenance Of Tunnels and Subsurface Structures |
| Z1LZ | Maintenance Of Parking Facilities |
| Z1MA | Maintenance Of Epg Facilities - Coal |
| Z1MB | Maintenance Of Epg Facilities - Gas |
| Z1MC | Maintenance Of Epg Facilities - Geothermal |
| Z1MD | Maintenance Of Epg Facilities - Hydro |
| Z1ME | Maintenance Of Epg Facilities - Nuclear |
| Z1MF | Maintenance Of Epg Facilities - Petroleum |
| Z1MG | Maintenance Of Epg Facilities - Solar |
| Z1MH | Maintenance Of Epg Facilities - Wind |
| Z1MZ | Maintenance Of Epg Facilities - Other, Including Transmission |
| Z1NA | Maintenance Of Fuel Supply Facilities |
| Z1NB | Maintenance Of Heating and Cooling Plants |
| Z1NC | Maintenance Of Pollution Abatement and Control Facilities |
| Z1ND | Maintenance Of Sewage and Waste Facilities |
| Z1NE | Maintenance Of Water Supply Facilities |
| Z1NZ | Maintenance Of Other Utilities |
| Z1PA | Maintenance Of Recreation Facilities (non-building) |
| Z1PB | Maintenance Of Exhibit Design (non-building) |
| Z1PC | Maintenance Of Unimproved Real Property (land) |
| Z1PD | Maintenance Of Waste Treatment and Storage Facilities |
| Z1PZ | Maintenance Of Other Non-building Facilities |
| Z1QA | Maintenance Of Restoration Of Real Property (public Or Private) |
| Z2AA | Repair Or Alteration Of Office Buildings |
| Z2AB | Repair Or Alteration Of Conference Space and Facilities |
| Z2AZ | Repair Or Alteration Of Other Administrative Facilities and Service Buildings |
| Z2BA | Repair Or Alteration Of Air Traffic Control Towers |
| Z2BB | Repair Or Alteration Of Air Traffic Control Training Facilities |
| Z2BC | Repair Or Alteration Of Radar and Navigational Facilities |
| Z2BD | Repair Or Alteration Of Airport Runways and Taxiways |
| Z2BE | Repair Or Alteration Of Airport Terminals |
| Z2BF | Repair Or Alteration Of Missile System Facilities |
| Z2BG | Repair Or Alteration Of Electronic and Communications Facilities |
| Z2BZ | Repair Or Alteration Of Other Airfield Structures |
| Z2CA | Repair Or Alteration Of Schools |
| Z2CZ | Repair Or Alteration Of Other Educational Buildings |
| Z2DA | Repair Or Alteration Of Hospitals and Infirmaries |
| Z2DB | Repair Or Alteration Of Laboratories and Clinics |
| Z2DZ | Repair Or Alteration Of Other Hospital Buildings |
| Z2EA | Repair Or Alteration Of Ammunition Facilities |
| Z2EB | Repair Or Alteration Of Maintenance Buildings |
| Z2EC | Repair Or Alteration Of Production Buildings |
| Z2ED | Repair Or Alteration Of Ship Construction and Repair Facilities |
| Z2EE | Repair Or Alteration Of Tank Automotive Facilities |
| Z2EZ | Repair Or Alteration Of Other Industrial Buildings |
| Z2FA | Repair Or Alteration Of Family Housing Facilities |
| Z2FB | Repair Or Alteration Of Recreational Buildings |
| Z2FC | Repair Or Alteration Of Troop Housing Facilities |
| Z2FD | Repair Or Alteration Of Dining Facilities |
| Z2FE | Repair Or Alteration Of Religious Facilities |
| Z2FF | Repair Or Alteration Of Penal Facilities |
| Z2FZ | Repair Or Alteration Of Other Residential Buildings |
| Z2GA | Repair Or Alteration Of Ammunition Storage Buildings |
| Z2GB | Repair Or Alteration Of Food Or Grain Storage Buildings |
| Z2GC | Repair Or Alteration Of Fuel Storage Buildings |
| Z2GD | Repair Or Alteration Of Open Storage Facilities |
| Z2GZ | Repair Or Alteration Of Other Warehouse Buildings |
| Z2HA | Repair Or Alteration Of Government-owned Contractor-operated (goco) R&d Facilities |
| Z2HB | Repair Or Alteration Of Government-owned Government-operated (gogo) R&d Facilities |
| Z2HC | Repair Or Alteration Of Government-owned Contractor-operated (goco) Environmental Laboratories |
| Z2HZ | Repair Or Alteration Of Government-owned Government-operated (gogo) Environmental Laboratories |
| Z2JA | Repair Or Alteration Of Museums and Exhibition Buildings |
| Z2JB | Repair Or Alteration Of Testing and Measurement Buildings |
| Z2JZ | Repair Or Alteration Of Miscellaneous Buildings |
| Z2KA | Repair Or Alteration Of Dams |
| Z2KB | Repair Or Alteration Of Canals |
| Z2KC | Repair Or Alteration Of Mine Fire Control Facilities |
| Z2KD | Repair Or Alteration Of Mine Subsidence Control Facilities |
| Z2KE | Repair Or Alteration Of Surface Mine Reclamation Facilities |
| Z2KF | Repair Or Alteration Of Dredging Facilities |
| Z2KZ | Repair Or Alteration Of Other Conservation and Development Facilities |
| Z2LA | Repair Or Alteration Of Airport Service Roads |
| Z2LB | Repair Or Alteration Of Highways/roads/streets/bridges/railways |
| Z2LC | Repair Or Alteration Of Tunnels and Subsurface Structures |
| Z2LZ | Repair Or Alteration Of Parking Facilities |
| Z2MA | Repair Or Alteration Of Epg Facilities - Coal |
| Z2MB | Repair Or Alteration Of Epg Facilities - Gas |
| Z2MC | Repair Or Alteration Of Epg Facilities - Geothermal |
| Z2MD | Repair Or Alteration Of Epg Facilities - Hydro |
| Z2ME | Repair Or Alteration Of Epg Facilities - Nuclear |
| Z2MF | Repair Or Alteration Of Epg Facilities - Petroleum |
| Z2MG | Repair Or Alteration Of Epg Facilities - Solar |
| Z2MH | Repair Or Alteration Of Epg Facilities - Wind |
| Z2MZ | Repair Or Alteration Of Epg Facilities - Other, Including Transmission |
| Z2NA | Repair Or Alteration Of Fuel Supply Facilities |
| Z2NB | Repair Or Alteration Of Heating and Cooling Plants |
| Z2NC | Repair Or Alteration Of Pollution Abatement and Control Facilities |
| Z2ND | Repair Or Alteration Of Sewage and Waste Facilities |
| Z2NE | Repair Or Alteration Of Water Supply Facilities |
| Z2NZ | Repair Or Alteration Of Other Utilities |
| Z2PA | Repair Or Alteration Of Recreation Facilities (non-building) |
| Z2PB | Repair Or Alteration Of Exhibit Design (non-building) |
| Z2PC | Repair Or Alteration Of Unimproved Real Property (land) |
| Z2PD | Repair Or Alteration Of Waste Treatment and Storage Facilities |
| Z2PZ | Repair Or Alteration Of Other Non-building Facilities |
| Z2QA | Repair Or Alteration Of Restoration Of Real Property (public Or Private) |