1) Advocates for Responsible Disposal in Texas (ARDT)

2) AGC of Texas

3) C&D Waste LTD

4) Dallas-Fort Worth International Airport

5) Hyde Regulatory Consulting, LLC

6) RGI Materials

7) Second Nature Compost LLC

1) AGC of Texas

2) Arcosa LWS, LLC

3) Arcosa Materials, Inc.

4) BFI Waste Services of Texas, LP

5) C&D Waste, Ltd

6) Caliza Development LLC

7) Colorado Materials, Ltd.

8) Commercial Metals Company

9) D1 Real Estate LLC

10) Dallas/Fort Worth International Airport

11) Ector County Generation LLC

12) FA Victoria 1 LLC

13) First Ammonia LLC

14) Flying W Properties, Ltd.

15) Fox Tank Company

16) Freedom Boats USA, LLC

17) HC Mining, LLC

18) HillCo Partners, LLC

19) Hunter Industries Ltd.

20) Indorama Ventures Oxides LLC

21) Jewett Mine LLC

22) Jimmy Evans Company, LTD.

23) Lion Elastomers LLC

24) Muldoon Minerals, Inc.

25) NRG Texas Power, LLC

26) PHR Holdings LLC

27) Pioneer Natural Resources USA, Inc.

28) Republic EES, LLC

29) Republic Services, Inc.

30) Republic Waste Services of Texas, Ltd.

31) RGI Materials Inc.

32) Rio Perla Properties, L.P.

33) Second Nature Compost LLC

34) Southwest Shipyards L.P.

35) Structural Metals, Inc.

36) Summit Next Gen, LLC

37) US Ecology Texas, Inc.

38) US Ecology, Inc.

39) Weisman Equipment Company, Ltd.

40) Wharton County Generation, LLC

41) Zinc Resources LLC