To use this template: - Clean Harbors

James M. Rutledge
Vice Chairman and
Chief Financial Officer
42 Longwater Drive 781.792.5100
P.O. Box 9149 Fax 781.792.5900
Norwell, MA 02061-9149
www.cleanharbors.com
July 23, 2012
Re: Clean Harbors’ Acquisition of Sierra Process Systems, Inc.
Attention: Accounts Payable
I am pleased to announce the acquisition of Sierra Process Systems, Inc. by Clean Harbors, Inc.
effective July 20, 2012. Through the combination of Sierra and Clean Harbors our onsite
dewatering services are significantly enhanced.
In order to assist you through this transition process, we are forwarding the attached critical
Invoice Payment Fact Sheet. Please use the information to correct your payment Remit to
Address, banking ACH/Wire detail and lockbox information currently on file.
Our objective is to provide you with comprehensive environmental, energy and industrial
services. Your business is important to us, and we look forward to a great future together.
Sincerely,
James M. Rutledge
Vice Chairman and Chief Financial Officer
“People and Technology Creating a Safer, Cleaner Environment”

Clean Harbors Industrial Services, Inc. - Invoice Payment Fact Sheet
for former Sierra Process Systems, Inc. Customers in the United
States
Please forward your electronic payment via wire transfer or ACH in support of Clean Harbors’
initiative toward paperless payment and remittance processing.
• EFT (ACH/Wire) Payment Information:
Bank Name: Bank of America
ACH ABA# (routing): 111-000-012
Wire ABA# (routing): 026-009-593
Account of: Clean Harbors Environmental Services, Inc.
Account Number: 3756420025
Bank Address:
600 Peachtree Street, NE
Atlanta, GA 30308
Type of Account: Checking
Note: please email your remittance advice to eft@cleanharbors.com.
Federal Tax ID #: 522339707
Dunn & Bradstreet #: 15-779-3639
• LOCKBOX Payment Information:
If unable to forward your payment via wire transfer or ACH, please send your
check to:
Clean Harbors Environmental Services, Inc.
P.O. Box 3442
Boston, MA 02241-3442
• To contact Clean Harbors directly regarding any support issues:
Sandy Fletcher 800.282.0058, x5218 Corporate Credit Supervisor
Linda Savini 800.282.0058, x5281 Corporate Accounts Receivable Supervisor
Sharon Furtado 800.282.0058, x5250 Corporate Credit and Collections Manager
• Please mail your correspondence to Clean Harbors’ corporate address located at:
Clean Harbors Environmental Services, Inc.
Attn: Accounts Receivable
P.O. Box 9149
42 Longwater Drive
Norwell, MA 02061-9149
“People and Technology Creating a Safer, Cleaner Environment”