Montrose Environmental Group, Inc. Acquires Emission Testing Services, Inc.

MEETSApril 30, 2014 (Baton Rouge, LA) – Montrose Environmental Group, Inc. is pleased to announce that it has acquired Emission Testing Services, Inc. Terms of the transaction were not disclosed.

Emission Testing Services, Inc. is an air emissions consulting company providing stack testing and related environmental services to industrial clients, primarily refineries and chemical plants. The Emissions Testing Services team will join Montrose as part of this transaction.

“We are excited to be joining the Montrose team. With Montrose’s geographic footprint and technical expertise, we are expanding our operations and the ability to serve our customers will be greatly enhanced,” said Fred Dowling, President of Emission Testing Services.

Jeremiah Yu, Co-Chief Executive Officer of Montrose Environmental Group, added, “We are pleased to welcome the Emission Testing Services team to Montrose. The southeastern United States market is one we are committed to, and this acquisition provides an opportunity to partner with an experienced team and deepen our resources in this region.”

About Emission Testing Services, Inc.

Emission Testing Services, Inc. (“ETS”), founded in 1986 and located in Baton Rouge, provides stack testing and environmental related services to industrial clients. ETS performs all Appendix A EPA reference methods, NESHAPS, incinerator trial burns, BACT testing, and hot zone characterizations. In addition to state and EPA reference methods, ETS performs numerous non-routine studies such as fence-line monitoring for specific pollutants, efficiency studies for product recovery and combustion as well as SARAH title III, BIF and air toxic studies. ETS also certifies continuous emission monitor systems by Performance Specification Testing, maintains certifications on CEMS, and performs BIF certifications. ETS is accredited by the Louisiana Environmental Laboratory Accreditation Program (LELAP). For more information, visit www.emissiontesting.com.

About Montrose Environmental Group, Inc.

Montrose Environmental Group, Inc. is a national, high-growth environmental company offering Air Quality and Environmental Laboratory services to a diverse range of clients in industry and government. Headquartered in Orange County, California, Montrose Environmental Group, Inc. has 16 offices and approximately 225 employees nationwide. For more information, visit www.montrose-env.com.