STONEPEAK COMMONWEALTH HOLDINGS LLC
By: STONEPEAK COMMONWEALTH UPPER HOLDINGS LLC, its managing member
By: STONEPEAK INFRASTRUCTURE FUND II (AIV) LP, its managing member
By: STONEPEAK ASSOCIATES II LLC, its general partner
By: STONEPEAK GP HOLDINGS II LP, its sole member
By: STONEPEAK GP INVESTORS II LLC, its general partner
By: STONEPEAK GP INVESTORS MANAGER LLC, its managing member
By: /s/ Michael Dorrell
Name: Michael Dorrell
Title: Managing Member Date: 10/12/2018
STONEPEAK COMMONWEALTH UPPER HOLDINGS LLC
By: STONEPEAK INFRASTRUCTURE FUND II (AIV) LP, its managing member
By: STONEPEAK ASSOCIATES II LLC, its general partner
By: STONEPEAK GP HOLDINGS II LP, its sole member
By: STONEPEAK GP INVESTORS II LLC, its general partner
By: STONEPEAK GP INVESTORS MANAGER LLC, its managing member
By: /s/ Michael Dorrell
Name: Michael Dorrell
Title: Managing Member Date: 10/12/2018
STONEPEAK INFRASTRUCTURE FUND II (AIV) LP
By: STONEPEAK ASSOCIATES II LLC, its general partner
By: STONEPEAK GP HOLDINGS II LP, its sole member
By: STONEPEAK GP INVESTORS II LLC, its general partner
By: STONEPEAK GP INVESTORS MANAGER LLC, its managing member
By: /s/ Michael Dorrell
Name: Michael Dorrell
Title: Managing Member Date: 10/12/2018
STONEPEAK ASSOCIATES II LLC
By: STONEPEAK GP HOLDINGS II LP, its sole member
By: STONEPEAK GP INVESTORS II LLC, its general partner
By: STONEPEAK GP INVESTORS MANAGER LLC, its managing member
By: /s/ Michael Dorrell
Name: Michael Dorrell
Title: Managing Member Date: 10/12/2018
STONEPEAK GP HOLDINGS II LP
By: STONEPEAK GP INVESTORS II LLC, its general partner
By: STONEPEAK GP INVESTORS MANAGER LLC, its managing member
By: /s/ Michael Dorrell
Name: Michael Dorrell
Title: Managing Member Date: 10/12/2018
STONEPEAK GP INVESTORS II LLC
By: STONEPEAK GP INVESTORS MANAGER LLC, its managing member
By: /s/ Michael Dorrell
Name: Michael Dorrell
Title: Managing Member Date: 10/12/2018
STONEPEAK GP INVESTORS MANAGER LLC
By: /s/ Michael Dorrell
Name: Michael Dorrell
Title: Managing Member Date: 10/12/2018
