Q649. Do we include the quantity of SF6 contained in hermetically sealed equipment when determining applicability under subpart DD?

A649. No, hermetically sealed-pressure equipment is excluded when determining if you exceed the reporting threshold of 17,820 pounds according to 98.301(a).  However, the calculation parameters specified in equation DD-1 do include the quantity of SF6 contained in hermetically sealed equipment, so information on hermitically sealed equipment is included in the reporting requirements for subpart DD.