A&B Environmental
AC Power
Avery Dennison
AWT Environmental
Bemis Company
Borden Chemical
Duphil, Inc.
ECCO III
Expansion Seal Tech.
Marisol
Martins Creek
Montenay Inc.
Montour
National Starch and Chemical
Newpark Environmental Services
Northeast Power
Osram Sylvania
P2S Plant Performance Services, Valero/Krotz Springs
P2S Plant Performance Services/BASF/Fina
Panther Creek (Constellation Operating Service)
Scheck Industries
Shaw E&I
TDC, ConocoPhillips
Temple Island
Testex Inc.

Merrick's is also a member of ARIPPA , An Association of Independent Power Producers in the Anthracite and Bituminous Regions of Pennsylvania, which enables it to perform services such as nuclear water-cooling tower maintenance for ARIPPA members.

Pennsylvania Power and Light Steam Electric Stations:
Susquehanna SES (Nuclear)
Montour SES
Martins Creek SES
Brunner Island SES
Sunbury SES

ARIPPA association plant members:
(Edison Mission Energy)
A&C Environmental
American Bituminous Power Partners
American Power Services
Associated Plants
Cambria Cogen Co.
Chiller Inspection Services
Dominion Generation North Branch Power Station
Ebensbury Power Co.
Foster Wheeler Power
Gilberton Power Company
Hazleton Oil Salvage LTD.
Hazleton Painting Co.
Hennigan Engineering
Inter-Power
Koppers Industries, Inc.
Mobile Dredging & Pumping Co.
Morgantown Energy Associates
NLB Corp.
Northeastern Power Company
Panther Creek Partners
PG&E National Energy Group
Pillsbury Company
Piney Creek LP
Sunbury Generation LLC.
Viking Energy of Northumberland
Westwood Operating LLC
Wheelabrater Frackville Energy Co.
WPS Westwood Generation LLC
Yanuzzi Inc.