Nov 14, 2016
Humans can be exposed to hazardous air pollutants (HAPs) either directly through inhalation or indirectly through ingestion or dermal contact, which can result in acute or chronic health effects. The risk of exposure varies depending on a number of variables, including the following:
To evaluate and quantify the potential health impacts that may result from specific exposure scenarios, human health risk assessments (HHRAs) are conducted.
There are a number of steps involved with conducting a HHRA. Modelers must first identify the chemicals of potential concern (COPC) as well as the emission rates and sources. The U.S. EPA Human Health Risk Assessment Protocol (HHRAP) can be used to identify the COPCs as this protocol provides methodology guidance, fate and transport, exposure and health risk algorithms for predicting the impacts of COPC released into the atmosphere from emission sources. The next step is to select the exposure scenarios, for which recommendations can also be found in the HHRAP, and then estimate the media concentrations, exposure, and risk. The movement of COPCs in the environment can be a complex process so modelers can use the AERMOD model to conduct the air dispersion modeling. Then, the AERMOD input and output files from the air dispersion modeling analysis, along with chemical-specific fate and transport variables, can be used as the necessary inputs for the media and exposure equations in the HHRAP which account for the movement of chemicals within and between media including air, soil, water, and sediment.
To streamline the HHRA process, BREEZE Software offers BREEZE AERMOD and BREEZE Risk Analyst, which modelers may use in combination to conduct their air dispersion modeling analyses and then seamlessly complete the risk assessment. BREEZE Risk Analyst is an add-in for Esri ArcGIS that is designed to perform human health risk assessment modeling by implementing the fate and transport equations from the HHRAP within the software and allowing for the seamless visualization of results. Additionally, Risk Analyst provides modelers with the ability to import source data from AERMOD input (.inp) files as well as modeled impacts from AERMOD plot (.plt) files, thereby streamlining and simplifying the HHRA process.
Follow these steps to import AERMOD input and output files into BREEZE Risk Analyst for your human health risk assessments.
In a few simple steps, you can import your AERMOD input and output files into BREEZE Risk Analyst for use in your human health risk assessments. Please contact the BREEZE Team at firstname.lastname@example.org or +1 (972) 661-8881 if you have any questions when conducting your human health risk assessment or to purchase a license of BREEZE AERMOD and/or Risk Analyst.