Entity

  ​ ​ ​

State of Formation

1960 Well Services, LLC

​

Ohio

Affirm Oilfield Services, LLC

​

Texas

Badlands Power Fuels, LLC

​

Delaware

Badlands Power Fuels, LLC

​

North Dakota

Big Spring Recycling System, LLC

​

Delaware

Blackjack Mineral Investments, LLC

​

Texas

Bobcat North Lima, LLC

​

Ohio

Breakwater Energy Partners, LLC

​

Texas

Breakwater Energy Services, LLC

​

Texas

Breakwater Midstream, LLC

​

Texas

Buckhorn Disposal ND, LLC

​

Delaware

Buckhorn Energy Oaks Disposal Services, LLC

​

Delaware

Clearwater Five, LLC

​

Ohio

Clearwater Solutions, LLC

​

Ohio

Clearwater Three, LLC

​

Ohio

Complete Energy Services, Inc.

​

Delaware

Crescent Companies, LLC

​

Delaware

Dishon Disposal, LLC

​

North Dakota

EnerMAX Services G.P. ULC

​

Alberta

EnerMAX Services Holdings, LLC

​

Delaware

EnerMAX Services Limited Partnership

​

Alberta

EnerMAX Services (U.S.) Inc.

​

Delaware

EWS #1 DJ Basin LLC

​

Delaware

EWS #8 DJ Basin LLC

​

Delaware

Guard Drilling Mud Disposal, LLC

​

Delaware

Heckmann Water Resources (CVR), Inc.

​

Delaware

Heckmann Water Resources (CVR), LLC

​

Delaware

Heckmann Water Resources, LLC

​

Delaware

Ideal Oilfield Disposal, LLC

​

North Dakota

Landtech Enterprises, L.L.C.

​

North Dakota

Mallard Midstream, LLC

​

Delaware

Navy Holdings, Inc.

​

Delaware

Navy Holdco, LLC

​

Delaware

New Heckmann Water Resources Corporation

​

Delaware

Nuverra Ohio Disposal LLC

​

Delaware

Nuverra Total Solutions, LLC

​

Delaware

Oaks’ Disposal Services, LLC

​

Montana

Peak Rentals, LLC

Texas

Quail Run Services, LLC

​

Texas

Rockwater Energy Solutions North Dakota, Inc.

​

Delaware

Rockwater Energy Solutions Water Management, LLC

​

Delaware

Rockwater Production Testing Ltd.

​

Alberta

Rockwater West TX, LLC

​

Delaware

Select Agua Libre Midstream, LLC

​

Delaware

Select Chemistry, LLC

Delaware

Select Energy Services, LLC

​

Texas

Select Energy Solutions (RW), Inc.

​

Delaware

Select Water Reuse, LLC

​

Delaware

Select Water Solutions, LLC

Delaware

SES Holdings, LLC

Delaware

SES Intermediate Holdings, LLC

​

Delaware

SES Sub A, LLC

​

Delaware

SES Sub B, LLC

​

Delaware

SES Sub C, LLC

​

Delaware

SWS ND, Inc.

​

Delaware

Trinity Acquisition, LLC

​

Delaware

Trinity Environmental Brokerage, L.L.C.

​

Delaware

Trinity Environmental Management, LLC

​

Delaware

Trinity Environmental Services I, L.L.C.

​

Delaware

Trinity Environmental SWD I, L.L.C.

​

Delaware