Certificate of RegistrationThis certifies that the Quality Management System of

Waste Management Sustainability Services720 E. Butterfield Rd.

Lombard, Illinois, 60148, United States

has been assessed by NSF-ISR and found to be in conformance to the following standard(s):

ISO 9001:2008

Scope of Registration:Environmental management services associated with all activities related to the U.S. and Canadian Operations Groups,

under the Sustainability Services line of business of Waste Management.

Carl Blazik,Director, Technical Operations & Business Units,NSF-ISR, Ltd.

Certificate Number: 3Y251-IS7Certificate Issue Date: 21-JUL-2015Registration Date: 21-SEP-2015Expiration Date *: 20-SEP-2018