Q507. How do we report emissions from separate facilities that inject or withdraw gas from the same underground storage reservoir?

A507. The underground natural gas storage industry segment uses the definition of “facility” in 40 CFR 98.6 (subpart A).  For each facility as defined in 40 CFR 98.6, you must determine if it contains any of the industry segments listed in subpart W and compare the total facility emissions against the 25,000 mtCO2e threshold defined in 40 CFR 98.2(a)(2) to determine applicability.  If an underground natural gas storage facility has multiple owners or operators, one designated representative must be appointed for reporting purposes.