Don't leave open containers of wastes or other materials outside.​ ​Dumpster lids should be kept closed when not in use to keep rain out and uncontained liquids should never be placed in a dumpster — they will leak out.

All wastes should be contained and managed in a responsible manner that prevents exposure to rainfall or discharge to the storm drainage system.  

Shop and restaurant floors should never be hosed out so that the wash water can run outdoors or into a storm drain. Dry cleanup methods should be used as often as possible.

Spills, leaks and other messes that occur should be immediately cleaned, preferably using dry methods such as ​absorbent materials which must be properly disposed of.

Dirty, oily, or rusty junk items should not be left outdoors. Consider properly disposing of these items or placing them in covered locations to prevent stormwater contact. At a minimum, these items should be covered with weighted or fastened tarps and stored off the ground (e.g., on pallets). Fluids from engine crank cases, differentials, and radiators should be drained and properly disposed of prior to storage.

Sweep indoor and outdoors areas as often as necessary to prevent sediment or other pollutants that may be generated, from being tracked outdoors or offsite.​