| PSC | Description
|
| F001 | Natural Resources/conservation- Aerial Fertilization/spraying |
| F002 | Natural Resources/conservation- Aerial Seeding |
| F003 | Natural Resources/conservation- Forest-range Fire Suppression/presuppression |
| F004 | Natural Resources/conservation- Forest/range Fire Rehabilitation (non-construction) |
| F005 | Natural Resources/conservation- Forest Tree Planting |
| F006 | Natural Resources/conservation- Land Treatment Practices |
| F007 | Natural Resources/conservation- Range Seeding (ground Equipment) |
| F008 | Natural Resources/conservation- Recreation Site Maintenance (non-construction) |
| F009 | Natural Resources/conservation- Seed Collection/production |
| F010 | Natural Resources/conservation- Seedling Production/transplanting |
| F011 | Natural Resources/conservation- Surface Mining Reclamation (non-construction) |
| F012 | Natural Resources/conservation- Survey Line Clearing |
| F013 | Natural Resources/conservation- Tree Breeding |
| F014 | Natural Resources/conservation- Tree Thinning |
| F015 | Natural Resources/conservation- Well Drilling/exploratory |
| F016 | Natural Resources/conservation- Wildhorse/burro Control |
| F018 | Natural Resources/conservation- Other Forest/range Improvements (non-construction) |
| F019 | Natural Resources/conservation- Other Wildlife Management |
| F020 | Natural Resources/conservation- Fisheries Resources Management |
| F021 | Natural Resources/conservation- Site Preparation |
| F022 | Natural Resources/conservation- Fish Hatchery |
| F099 | Natural Resources/conservation- Other |
| F101 | Environmental Systems Protection- Air Quality Support |
| F103 | Environmental Systems Protection- Water Quality Support |
| F105 | Environmental Systems Protection- Pesticides Support |
| F107 | Environmental Systems Protection- Toxic and Hazardous Substance Analysis |
| F108 | Environmental Systems Protection- Environmental Remediation |
| F109 | Environmental Systems Protection- Leaking Underground Storage Tank Support |
| F110 | Environ Sys Protect- Development Of Environ Impact Stmts/assessments, Tech Analysis/environ Audits |
| F111 | Environmental Systems Protection- Multiple Pollutant Support |
| F112 | Environmental Systems Protection- Oil Spill Response |
| F113 | Environmental Systems Protection- Wetlands Conservation and Support |
| F114 | Environmental Systems Protection- Environmental Licensing and Permitting |
| F115 | Environmental Systems Protection- Environmental Consulting and Legal Support |
| F999 | Other Environmental Services |