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Q173. What is meant by "otherwise used on site" for the subpart MM equations using feedstock quantities?

A173. A product that is "otherwise used on site" includes but is not limited to a product that is combusted on site. A product that remains in the same container or vessel during the entire period from entering the facility to exiting the facility (ex refinery gate) is not considered "otherwise used on site." If, however, a product enters your facility to be blended with finished products, does not remain in the same container or vessel, and is a petroleum product or NGL, then the product must be reported as a feedstock under §98.396. Likewise, when the final, blended product exits the refinery, it must be reported under §98.396.

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