A SWPPP sign — also searched as SW3P — is the stormwater contact board your plan calls for: project name, permit number, after-hours phone. Not a land use sign. Not an OSHA header.
Ecology and city inspectors look for the SWPPP sign at the entrance. A paper printout in a sheet protector is how that board disappears in the first storm. We print a durable face and set it where the plan shows.
Tree protection signs and limits-of-disturbance faces mark save-trees so a sub does not stage lumber in the root zone. Same visit as the SWPPP sign when the dates line up.
GCs and the consultant who wrote the plan. Often paired with a land use sign.
