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Health Risk Assessments

Air Toxics

There are numerous local, state, and federal environmental, health and safety (EHS) regulations which regulate airborne toxic releases from industrial operations and other sources. Trinity has assisted industrial clients across the United States with various air toxic projects, including emission inventories, Air Toxics Inventory Reports (ATIRs), Health Risk Assessments (HRAs), and Risk Reduction Plans (RRPs). In addition, Trinity has conducted numerous air dispersion modeling studies, population exposure assessments, health risk characterizations, ambient monitoring and related air toxics work, which specifically include: 

  • Preparing ATIRs using the California Air Resources Board's (CARB's) HARP 2.0 / Emissions Inventory Module (EIM) format
  • Preparing HRAs using the CARB's HARP 2.0 / Air Dispersion Modeling and Risk Tool (ADMRT) software
  • Preparing multi-pathway HRAs in accordance with the U.S. EPA's Human Health Risk Assessment Protocol for Hazardous Waste Combustion Facilities (HHRAP)
  • Dispersion modeling with U.S. EPA air quality model AERMOD
  • Reporting of Air Toxics Emissions Inventories consistent with California Air District specific regulations
  • Preparation of Toxic Emission Inventory Plans and Reports (TEIP/TEIR) for various California Air Districts
  • Compliance with South Coast (CA)Air Quality Management District (SCAQMD)'s Guidelines for Participating in the Rule 1402 Voluntary Risk Reduction Program
  • Submission meeting the CARB Emission Inventory Criteria and Guidelines
  • Emission estimation techniques using emission factors, source test data, and other methods of emission quantification used to estimate air toxics emissions
  • Preparation of public notification packages and participation in public notification meetings for facilities with elevated risk levels

Why are Health Risk Assessments (HRAs) required?

Many air pollution and other EHS regulations specify human health risk standards for stationary source permitting, community protection, and accidental release planning. These include California Proposition 65, U.S. EPA Maximum Achievable Control Technology (MACT) standards, California Environmental Quality Act (CEQA), environmental justice, and other regulatory programs. HRAs are required to determine the extent of health risk impacts from existing and new industrial operations which emit Hazardous Air Pollutants (HAPs) and other air toxics. Exposure to air toxics can result in carcinogenic, acute and/or other chronic health effects. Humans can be exposed to toxics either directly, through inhalation, or indirectly, through ingestion or dermal contact. The magnitude of the risk varies as a function of the characteristics of the substance, duration and frequency of the exposure, meteorological conditions, geographical characteristics of the surrounding area, the emission characteristics of the facility, and the age of the individuals exposed. 

Software Modeling Expertise

Trinity's staff has intimate working knowledge of numerous air dispersion modeling and health risk assessment tools, including BREEZE Risk Analyst, California's Hot Spots and Assessment Program (HARP) model, AERMOD, AERMET, HARP 2.0, CALPUFF, and CalEEMod. Our clientele spans multiple industrial sectors which reflects the diverse industrial base of major source facilities including cement plants, incinerators, power generation, aerospace, electronics, chemical plants, biomedical, oil & gas, transportation, marine, light manufacturing, agricultural processors, and numerous others.

ArcGIS based-BREEZE Risk Analyst is designed to perform human health assessment modeling. It incorporates equations provided in the HHRAP and is well refined in its selection and use of coordinate systems, data handling, calculations, and management of georeferenced data systems. This highly flexible GIS-based analysis platform seamlessly combines the necessary tools, databases, GIS functionality, and modeling equations into one easy-to-use package that is designed to support the evolving requirements and challenges of today's health assessment applications.

Trinity Can Help - Contact Us

Trinity's extensive expertise in air quality related issues and understanding of the applicable air toxic regulations and HRAs, including California AB 2588, other California air district health risk guidelines and relevant rules, National Emission Standards for Hazardous Air Pollutants (NESHAPs), and Office of Environmental Health Hazard Assessment (OEHHA) Health Risk Assessment Guidelines. 
For assistance with health risk assessments, Trinity offers unmatched expertise and service quality. Call Trinity at +1 (800) 229-6655 or Contact Us online.

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