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.
Other Quality Control, Testing and Inspection Services: Ores, Minerals, and Their Primary Products
Possible NAICS Codes
541380 – Testing Laboratories
561320 – Temporary Help Services
541620 – Environmental Consulting Services
561990 – All Other Support Services