Air Quality Assessment Services

tonopah-headframeAir quality impact assessments have become the primary method used to evaluate the effect of new or modified air emission sources on air quality since the enactment of the Federal Clean Air Act of 1977.

An integral part of air quality impact studies for new or expanding facilities is the use of emission inventories and dispersion modeling. Agencies grant new permits based on the results of air quality impact studies and have adopted strict guidelines concerning the selection of models and assessment techniques.

EM Strategies’ technical and support staff facilitate permit acquisition or compliance activities through:

  • regulatory analysis and permit acquisition services;
  • emission inventories and assessments;
  • dispersion, visibility, and off-site consequence analysis modeling services;
  • ambient monitoring services; and
  • emission control technology evaluations and assessments.

The specific types of air quality assessments in which EM Strategies can assist natural resource development and industrial clients are summarized below.

Regulatory Analysis and Permit Acquisition Services

Complete and technically competent permit applications are essential to the timely acquisition of required permits. This is especially important in the development of the Federal Title V Operating Permit program and the implementation of delegated programs by most states.

At EM Strategies, we pride ourselves on the strong knowledge of federal, state and local regulatory programs and individual agency guidelines and protocols. Our understanding of industrial processes, which require an air quality permit, assures that our staff can meet the requirements to complete applications in a prompt manner.

Once a facility has obtained an air quality permit (particularly if the permit is a non-Title V or non-Prevention of Significant Deterioration [PSD] permit), the status of that permit
needs to be managed to ensure that as the facility develops and modifies, a valid permit is maintained and additional regulatory programs are not required.

EM Strategies can anticipate potential permit modifications or identify ways to minimize the need to modify the permit.

Emission Inventories and Assessments

The amount dome-hill-prospectof emissions from a facility affects the status of that facility relative to various regulatory programs, such as New Source Review (NSR), Title V, Title III, or a PSD.

EM Strategies’ knowledge of industrial processes and the potential sources of emissions allow us to provide timely and accurate emission inventories. These inventories can be used to manage the development of the facility to maintain existing regulatory requirements or actively address future requirements.

Our emission inventories and assessment services include general facility emission inventories or more specific criteria in regard to air pollutant inventories or hazardous air pollutant inventories (this includes fugitive emissions from mobile sources).

EM Strategies uses these inventories to complete assessments of the facility’s permit and regulatory status and requirements.


Dispersion, Visibility, and Off-Site Consequence Analysis Modeling Servicesp1070306

A wide selection of dispersion, visibility, and off-site consequence analysis models are available to evaluate multiple emission sources, these include the following:

  • EPA Air Quality Models: ISC3 (Short Term, Long Term), AERMOD, IGM, SCREEN3, INPUFF II
  • Offsite Consequence Analysis Models: SLAB, DEGADIS, AFTOX, SPILLS
  • Visibility Analysis Models: VISCREEN, PLUVUEII
  • Long Range Transport Modeling: MESOPUFF II, CALPUFF
  • Coastal Boundary, Flare, and Fumigation Models: SCREEN3, OCD
  • Transportation Source Models: CALINE3

Ambient Monitoring Services

Many regulated industries are required to operate ambient monitors as a result of permit conditions, PSD regulations, or acid rain monitoring requirements. In addition, many industries are pro-active, and independently monitor other pollutants and/or climatological parameters to ensure that sufficient information is available to make informed decisions regarding future projects and monitoring requirements.

EM Strategies can assist industry by providing quality ambient monitoring and reporting services for ambient monitoring networks, which include:

  • Auditing and Calibration Services at Ambient Monitoring Sites
  • Quality Assurance/Quality Control on Ambient Monitoring Data
  • Meteorological
  • Climatological
  • PM10
  • 5
  • Gaseous
  • Ambient Air Monitoring Station Design, Setup, and Operation
  • Monitoring Data Archiving on EM Strategies’ Database
  • Opacity Certification Services
  • Initial opacity certifications for required equipment
  • Visual opacity auditing services

Emission Control Technology Evaluations and Analysis

Many regulatory programs require that an emission control technology analysis must be performed for permit modifications or new sources. EM Strategies is able to assist clients with these analyses by providing the following types of control technology evaluations.

  • Conventional Emission Control Technology
  • Best Available Control Technology (BACT)
  • Lowest Achievable Emission Rate (LAER)
  • Best Available Retrofit Technology (BART)
  • Maximum Achievable Control Technology (MACT)
  • Reasonably Available Control Measures (RACM)charcoal-kilns