1) ALCOA

2) American Electric Power

3) American Electric Power

4) Central Arkansas Recycling and Disposal Services

5) City of Fayetteville, AR

6) City of Harrison

7) City of Springdale Water Utilities

8) City of Springdale Water Utilities

9) City of Yellville

10) Domtar A.W. LLC

11) Dow Chemical Company

12) Northwest Arkansas Nutrient Trading Research and Advisory Group (NANTRAG)

13) Remington Arms, LLC

14) Rineco Chemical Industries, Inc.

15) Tyson Foods Inc.

16) Vulcan Materials Company, Inc.