Determine which city, county, owner, and drainage requirements apply to the actual parcel. The contractor should explain how sweepings, oil residue, treatment products, and wash liquid will be kept from storm inlets, public streets, landscaped areas, and neighboring properties and identify the accepted handling route.
Closures should maintain required accessible, fire, emergency, guest, and delivery access unless the authorized property contact approves another arrangement. Unknown liquids, sharps, hazardous material, and unstable pavement should be isolated and documented rather than included automatically in routine sweeping or washing.