Thank you for your reply and clarification. I need to provide further links if you are seeking detail regarding the EPA and storage.
Basically the Environmental Protection Agency's primary focus on storage is to enforce and prevent spills through a plan that is required of storage facilities. 40 CFR 112, the federal law requires that aboveground storage capacity of more than 1,320 gallons of any type of oil must prepare a Spill Prevention, Control and Countermeasures Plan (SPCC). The EPA enforces the requirement for this plan and inspects SPCC plan holder’s facilities.
Following is a direct link to the EPA website and the storage plan requirements:
Following are the general storage standards as described by the National Biodiesel Board at its website linked below:
"In general, the standard storage and handling procedures used for petroleum diesel can be used for biodiesel. The fuel should be stored in a clean, dry, dark environment. Acceptable storage tank materials include aluminum, steel, fluorinated polyethylene, fluorinated polypropylene and teflon. Copper, brass, lead, tin, and zinc should be avoided."
The Board further indicates: " Biodiesel that meets ASTM D6751 and is legally registered with the Environmental Protection Agency is a legal motor fuel for sale and distribution."
I hope this further detail, information and links are responsive.