Ambient Air Quality Monitoring


TRC is one of the world’s largest providers of air measurement services and the first Air Emission Testing Body (AETB) to obtain accreditation to ASTM D7036 (Standard Practice for Competence of Air Emission Testing Bodies) from A2LA and the Stack Testing Accreditation Council (STAC). With more than 200 air quality scientists and engineers operating from a network of 19 offices, TRC’s Air Measurement Services (AMS) practice can readily support ambient air quality and meteorological monitoring programs worldwide.


TRC has been active in the meteorological and air quality monitoring arena since the 1960's. Today, we operate meteorological and air quality monitoring stations that serve the following purposes:

Compliance Demonstration - Ambient air quality monitoring can be required in connection with an operating permit, a consent decree, or voluntary compliance agreement. TRC develops ambient monitoring programs to meet compliance requirements, secures and installs the required components, operates the system, and typically provides web-based data access to the site owner, regulatory agency, and in many cases, the public.

Modeling, Permitting, & Litigation Support - Many of our clients have found they must make business decisions or respond to complaints based on ambient air quality data derived from a monitoring station that is not representative of their location. We support our clients by designing, installing, and operating meteorological and ambient air quality monitoring stations that provide the quality, defensible site-specific data they need to drive critical business decisions and operations. Importantly, we provide our clients with the ambient air quality and meteorological monitoring data they need to support Prevention of Significant Deterioration (PSD) permit applications and evaluate control technologies relative to evolving National Ambient Air Quality Standards (NAAQS).

Documentation of Remediation Site Operations - We work with the site owner, remediation contractor, and regulatory agency to develop an ambient monitoring program that cost-effectively documents the effectiveness of contaminant containment strategies at remediation sites. We have off-the-shelf solutions for coal combustion residual (CCR) and manufactured gas plant (MGP) remediation projects and can readily develop site specific programs for facility decomissioning or site remediation programs.

From the deployment of a diffusive sampler fenceline monitoring network to the design and implementation of a complex instrumental monitoring solution relying on gas chromatography or open path infrared technology that provides real-time, web-based information for multiple hazardous air pollutants, we are ready to support your next ambient air quality monitoring project.

Related Resources

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EPA Looking to Revise Official Definition of ‘Ambient Air’

Posted on Dec 18th, 2018 by ​Gale Hoffnagle, CCM, QEP

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Regulatory Update

Is MATS Moot? How the Recent Supreme Court Ruling May Not Affect Your MATS Strategy

Posted on Aug 13th, 2015 by Matthew Jones

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