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
562910 – Remediation Services
562111 – Solid Waste Collection
541620 – Environmental Consulting Services
423840 – Industrial Supplies Merchant Wholesalers
325120 – Industrial Gas Manufacturing
238220 – Plumbing, Heating, and Air-Conditioning Contractors