Exhibit 99.2
JOINT FILERS' SIGNATURES
Arrow Environmental SPV, LLC
By: /s/ Mark Spender Date: February 8, 2021
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Name: Mark Spender
Title: Authorized Person
AS&M Holdings LP
By: AS&M Holdings GP LLC, its general partner
By: /s/ Chris Dillon Date: February 8, 2021
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Name: Chris Dillon
Title: Authorized Person
AS&M Holdings GP LLC
By: /s/ Chris Dillon Date: February 8, 2021
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Name: Chris Dillon
Title: Authorized Person
AS&M SPV, LLC
By: /s/ Chris Dillon Date: February 8, 2021
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Name: Chris Dillon
Title: Authorized Person
BCP Energy Services Executive 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: February 8, 2021
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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: February 8, 2021
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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: February 8, 2021
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Name: Jeffrey Jenkins
Title: Authorized Person
BCP Energy Services Fund GP, LP
By: BCP Energy Services Fund UGP, LLC, its general partner
By: /s/ Jeffrey Jenkins Date: February 8, 2021
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Name: Jeffrey Jenkins
Title: Authorized Person
BCP Energy Services Fund UGP, LLC
By: /s/ Jeffrey Jenkins Date: February 8, 2021
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Name: Jeffrey Jenkins
Title: Authorized Person
James Bernhard
By: /s/ James Bernhard Date: February 8, 2021
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Jeffrey Jenkins
By: /s/ Jeffrey Jenkins Date: February 8, 2021
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