Rainwater in containment system of SPCC regulated farm

What do I do with rainwater that accumulates in my containment system for a farm regulated by the Spill Prevention, Control, and Countermeasure (SPCC) rule?

Check the rainwater for any oil, and if no oil is present, this can be released. If there is oil in the water, this water will need to be removed and disposed. If this happens, check with your state extension agent or your fuel dealer to get help.