Many catch basins are equipped with a drain valve. This is not a water drain. It was designed to drain spilled product back into the storage tank. Water and dirt drained from catch basins will drain directly into storage tanks. Water and dirt must be removed from catch basins with a pump, mop, or sponge.
Water lying at the bottom of the storage tank can cause rust-through and leaking.
Water removed from the bottom of a storage tank is loaded with toxic substances. Please don't pump water or petroleum products onto the apron, or into a storm sewer or drainage ditch. Avoid Unloading Errors Unloading the wrong product into a storage tank is another common cause of product contamination. To help prevent these errors, state law requires that fill pipes be marked with a permanent, engraved metal or plastic identification tag. The tag must clearly show the trade name, product grade, or octane of the product in the tank.