This means that you'll be able to search for NAICS codes directly (if that's your jam). We'll do the math; let's make better data on public procurement together.
Possible NAICS Codes
541620 – Environmental Consulting Services
562910 – Remediation Services
562211 – Hazardous Waste Treatment and Disposal
541330 – Engineering Services
541310 – Architectural Services
115310 – Support Activities for Forestry