1) AMALGAMATED TRANSIT UNION DIVISION 788

2) INTERNATIONAL ASSOCIATION OF BRIDGE, STRUCTURAL, ORNAMENTAL AND REINFORCING IRON WORKERS, LOCAL 396

3) INTERNATIONAL ASSOCIATION OF HEAT AND FROST INSULATORS AND ALLIED WORKERS LOCAL NO. 1

4) INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS LOCAL NO 1

5) INTERNATIONAL UNION OF OPERATING ENGINEERS LOCAL UNION NO 513

6) IRON WORKERS DISTRICT COUNCIL OF ST LOUIS AND VICINITY

7) MISSOURI AFL-CIO, AND CERTAIN OF ITS AFFLIATED LOCALS

8) MISSOURI FEDERATION OF TEACHERS AND SCHOOL-RELATED PERSONNEL LOCAL 6083

9) MISSOURI STATE BUILDING AND CONSTRUCTION TRADES COUNCIL AND CERTAIN OF ITS AFFILIATED LOCALS

10) PUBLIC SCHOOL RETIREMENT SYSTEM OF THE CITY OF ST LOUIS

11) SHEET METAL WORKERS INTERNATIONAL ASSOCIATION AFL-CIO LOCAL NO 36

12) SPRINKLER FITTERS LOCAL 268

13) ST. LOUIS BUILDING AND CONSTRUCTION TRADES COUNCIL AND CERTAIN OF ITS AFFILIATED LOCALS

14) UNITED ASSOCIATION OF PLUMBERS AND PIPEFITTERS LOCAL UNION NO 562