(512)4808962
823 Congress Avenue, Ste. 900, Austin, TX, 78701, 
1) Air Products and Chemicals, Inc.
3) BLUEBONNET ELECTRIC COOPERATIVE, INC.
6) Celanese International Corporation
7) Chisholm Trail Disposal, LLC
8) Covestro
10) Eastman Chemical - Texas Operations
11) El Paso and Hudspeth Counties Regional Water Supply Corporation
12) El Paso Water
13) Flint Hills Resources, LLC
16) GEXA Energy
18) Guadalupe-Blanco River Authority
19) Guardian Industries Holdings, LLC
20) Infor(US), LLC
21) INV Nylon Chemicals Americas, LLC
22) Koch Ag & Energy Solutions, LLC
23) Koch Engineered Solutions, LLC
25) Lone Star Transmission LLC
28) NextEra Energy Resources LLC
29) North Texas Municipal Water District