Exhibit 99.1
JOINT FILERS' NAMES AND ADDRESSES
1. Name: BCP Energy Services Fund GP, LP
Address: 400 Convention Street, Suite 1010
Baton Rouge, LA 70802
2. Name: BCP Energy Services Fund-A, LP
Address: 400 Convention Street, Suite 1010
Baton Rouge, LA 70802
3. Name: BCP Energy Services Fund, LP
Address: 400 Convention Street, Suite 1010
Baton Rouge, LA 70802
4. Name: Charah Holdings GP LLC
Address: 400 Convention Street, Suite 1010
Baton Rouge, LA 70802
5. Name: Charah Holdings LP
Address: 400 Convention Street, Suite 1010
Baton Rouge, LA 70802
6. Name: James Bernhard
Address: 400 Convention Street, Suite 1010
Baton Rouge, LA 70802
7. Name: Jeffrey Jenkins
Address: 400 Convention Street, Suite 1010
Baton Rouge, LA 7080
Exhibit 99.2
JOINT FILERS' SIGNATURES
BCP Energy Services Fund GP, LP
By: BCP Energy Services Fund UGP, LLC, its general partner
By: /s/ Jeffrey Jenkins Date: June 20, 2018
------------------------------
Name: Jeffrey Jenkins
Title: Authorized Person
BCP Energy Services Fund-A, LP
By: BCP Energy Services Fund GP, LP, its general partner
By: BCP Energy Services Fund UGP, LLC, its general partner
By: /s/ Jeffrey Jenkins Date: June 20, 2018
------------------------------
Name: Jeffrey Jenkins
Title: Authorized Person
BCP Energy Services Fund, LP
By: BCP Energy Services Fund GP, LP, its general partner
By: BCP Energy Services Fund UGP, LLC, its general partner
By: /s/ Jeffrey Jenkins Date: June 20, 2018
------------------------------
Name: Jeffrey Jenkins
Title: Authorized Person
Charah Holdings GP LLC
By: /s/ Mark Spender Date: June 20, 2018
------------------------------
Name: Mark Spender
Title: Authorized Person
Charah Holdings LP
By: Charah Holdings GP LLC, its general partner
By: /s/ Mark Spender Date: June 20, 2018
------------------------------
Name: Mark Spender
Title: Authorized Person
James Bernhard
By: /s/ James Bernhard Date: June 20, 2018
------------------------------
Jeffrey Jenkins
By: /s/ Jeffrey Jenkins Date: June 20, 2018
------------------------------