| Code | Description |
| NAICS 238910 | Site Preparation Contractors |
| NAICS 238990 | All Other Specialty Trade Contractors |
| NAICS 541350 | Building Inspection Services |
| NAICS 541620 | Environmental Consulting Services |
| NAICS 541690 | Other Scientific and Technical Consulting Services |
| NAICS 541990 | All Other Professional, Scientific, and Technical Services |
| NAICS 561210 | Facilities Support Services |
| NAICS 561990 | All Other Support Services |
| NAICS 562910 | Remediation Services |