| Name | Address, Zip |
|---|
| Afge Local 0557 | Urb Villa Andalucia Calle Colmenar, 00926 |
| National Active And Retired Federal Employees Association | Po Box 363554, 00936-3554 |
| National Active And Retired Federal Employees Association | Po Box 363554, 00936-3554 |
| International Union United Auto Aerospace & Agricultural Workers | Po Box 8728, 00910-0728 |
| International Association Of Machinics And Aerospace Workers | Po Box 19888, 00910-1888 |
| Puerto Rico Federation Of Labor Afl | Po Box 19689, 00910-1689 |
| Laborers International Union Of North America | 100 Calle Amazonas, 00926-2809 |
| Laborers International Union Of North America | 1704 Ave Ponce De Leon 201, 00909 |
| Communication Workers Of America | Po Box 360076, 00936-0076 |
| Laborers International Union Of North America | Po Box 366086, 00936-6086 |
| American Federation Of Government Employees | Po Box 33150, 00933-3150 |
| American Federation Of Government Employees | 235 Federico Costa Street, 00918-1341 |
| American Federation Of State County & Municipal Employees | Urb Monte Carlo 1244 Calle 2, 00924 |
| American Postal Workers Union | Po Box 366047, 00936-6047 |
| American Federation Of State County & Municipal Employees | Po Box 13695, 00908-3695 |
| American Federation Of State County & Municipal Employees | Po Box 13695, 00908-3695 |
| American Federation Of Government Employees | Po Box 33150, 00933-3150 |
| Office And Professional Employees International Union | Po Box 364173, 00936-4173 |
| United Food And Commercial Workers International Union | Po Box 11542, 00922-1542 |
| Asociacion De Maestros De P R | Po Box 191088, 00919-1088 |
| Union De Carpinteros De Puerto Rico | Po Box 364506, 00936-4506 |
| Union Independiente De Empleados Telefonicos De P R Inc | Urb Las Lomas 753 Calle 31 So, 00921 |
| Service Employees International Union | 1018 Ave Ponce De Leon, 00925-2906 |
| National Treasury Employees Union | Po Box 37297, 00937-0297 |
| Unite Here | Po Box 13037, 00908-3037 |
| United Steelworkers | Po Box 363845, 00936-3845 |
| United Steelworkers | 243 Calle Paris Pmb 1726, 00917-3632 |
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