1) ACC Houston, LLC
2) AGC of Texas
3) Aquality Solutions, Inc.
4) Arcosa Aggregates Texas, LLC
5) Arcosa LWS, LLC
6) Arcosa Materials, Inc.
7) BFI Waste Services of Texas, LP
8) Colorado Materials, Ltd.
9) Dallas/Fort Worth International Airport
10) Ector County Generation LLC
11) Elgin 104 Holdings LLC
12) FA Victoria 1 LLC
13) First Ammonia LLC
14) Florence 160 Dev LLC
15) Florence FM 970 Ventures, LLC
16) Flying W Properties, Ltd.
17) Fort Bend County Municipal Utility District No. 292
18) Greens Bayou 6 LLC
19) Heartland Quarries LLC
20) HillCo Partners, LLC
21) HTX Utility Solutions LLC
22) Hunter Industries Ltd.
23) Jewett Mine LLC
24) Jimmy Evans Company Inc.
25) Jimmy Evans Company, LTD.
26) JTX Land Holdings LLC
27) Lion Elastomers LLC
28) Macon Enterprises, L.L.C. DBA AgriRock, L.L.C.
29) Northwest Williamson County Municipal Utility District No. 3
30) NRG Texas Power, LLC
31) PHR Holdings LLC
32) Pleak 54 Holdings, LLC
33) Power Infrastructure Partners, Inc.
34) Republic EES, LLC
35) Republic Services, Inc.
36) Republic Waste Services of Texas, Ltd.
37) RGI Materials Inc.
38) Second Nature Compost LLC
39) SL Energy Power Plant I, LLC
40) SLR Property I, LP
41) Southwest Shipyards L.P.
42) Tidal PWR, LLC
43) US Ecology Texas, Inc.
44) US Ecology, Inc.
45) Weisman Equipment Company, Ltd.
46) Williamson County Municipal Utility District No. 42
47) Zinc Resources LLC