1) CLEAN HARBORS ENVIRONMENTAL SERVICES, INC. d/b/a CLEAN HARBORS

2) DOWNTOWN OKLAHOMA CITY, INCORPORATED d/b/a DOWNTOWN OKLAHOMA CITY,INC.

3) ENABLE MIDSTREAM PARTNERS, LP d/b/a ENABLE

4) ENVIRONMENTAL FEDERATION OF OKLAHOMA INC. d/b/a EFO

5) NEWVIEW OKLAHOMA, INC. d/b/a NEWVIEW OKLAHOMA

6) OPEN FOR BUSINESS OKLAHOMA, LLC d/b/a OPEN FOR BUSINESS OKLAHOMA

7) PUBLIC SERVICE COMPANY OF OKLAHOMA d/b/a AEP-PSO

8) THE EMPIRE DISTRICT ELECTRIC COMPANY d/b/a LIBERTY UTILITIES CO.

9) THE PETROLEUM ALLIANCE OF OKLAHOMA, INC. d/b/a OIPA