The drain is not a disposal site
Storm drains move water off pavement. They do not go to a landfill, and they do not clean what you put in them. Pressure-washing a rental box in a lot pushes dirt, paint chips, oil, and whatever else was in the load toward that drain or into the street. That is true even when the water looks clear after a minute. The first minute is the dirty one. Dry-sweep ordinary debris while you are still at the disposal site and put it in the bay. A broom and a dustpan do the job a hose only relocates. If you are tempted to wash the truck because the rental lot has a spigot, do not. The spigot is not permission. Neither is an empty parking space at the edge of the lot.
Hazardous leftovers do not get diluted
Paint, oil, gasoline, solvents, and unknown liquids are not a washing problem. Do not hose them into the lot, the street, or a drain. Do not dilute them and hope. Absorb and bag rags the way your household hazardous-waste program describes, and tell the rental counter what spilled. Gasoline, solvents, and pool chemicals belong at that program in the first place. Do not dump, burn, or evaporate them to avoid a spill talk. A pressure washer also drives liquid into the plywood seams, which hides the stain until the next renter smells it. Blot. Do not soak the floor to improve a photo. If you do not know what the liquid is, treat it as unknown and stop. Unknown is a reason to ask, not a reason to rinse.
What a real cleanup looks like instead
Sweep, vacuum ordinary dry grit, magnet-sweep fasteners, and brush the ramp and the steps. Empty those tools at the disposal site. Brush mud off the step treads. Mud from soil is not the same as a chemical sheen, and you still do not wash a sheen into the lot. The engine bay is not part of this cleanup. Do not pressure-wash the engine. Water there is damage, and dirt on a step needs a brush. Photograph the empty box. If a stain remains, say so at the counter and show the photo. The contract handles charges. Do not invent one, and do not invent a wash fee you avoided. A dry, empty, honest return is the cleanup. A wet parking lot with a rainbow sheen is the opposite.
Before you go
- Dry-sweep ordinary debris into a bag at the disposal site.
- Do not pressure-wash the box, the ramp, or the engine.
- Absorb paint, oil, gasoline, solvents, and unknown liquids. Do not rinse them.
- Tell the rental desk about a spill instead of sending it toward a drain.
Pressure-washing the box in the rental lot so the dirty water runs to the storm drain.
Questions people ask
What if the site has a wash rack?
Use it only if that disposal site tells you the rack is for your kind of cleanup and where the water goes. Do not assume a hose bib is a wash rack. If they did not point you to it, dry-sweep and leave. A random hose is how waste reaches the street.
The floor is only dusty. Is a light rinse harmless?
No. Dust from a junk load is still the load. It can include grit you did not identify. Sweep it into a bag and put the bag in the disposal bay. A light rinse is still a rinse, and the drain does not sort harmless from not.
Search Dumpmapper by ZIP code or city, then call the site before you load the truck. Hours and accepted materials change.