Certification runs at two levels, supervisory and operational, across categories including agricultural, forest, ornamental and turf, aquatic, right of way, structural and health, government public health, regulatory, research and aerial. Structural operators live in the structural and health category, and adding aquatic, right of way or aerial work means adding a category rather than simply adding a customer.
The application rules in Pes 500 are stricter than most states and they shape daily work rather than paperwork. Turf applications require written notification to private property customers before the application and at least annually. Multifamily dwellings require notification between seventy two hours and two weeks beforehand. Public and recreational areas require posted signs or written notices that stay visible for forty eight hours after the application. The sign itself is specified: eight and a half by eleven inches, yellow background, black lettering, showing the common chemical names of the pesticides, the treatment date, the treated areas and contact information.
Setbacks are the other operational constraint. No applications within waterfront buffers, meaning fifty feet of water reference lines, or within wetlands, without a special permit for controlling forest insects, mosquitoes or biting arthropods. Applications within two hundred fifty feet of public water supply surface waters require special permits. Wells are stricter still, at four hundred feet from gravel packed wells and two hundred fifty feet from other public water supply wells. Aerial application requires a special permit with environmental impact assessment, and residential aerial work requires public hearings and cannot occur during school transportation times or near schools and daycare facilities.