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AIR DISPERSION MODELING ECCI engineers are experienced in handling complex air dispersion modeling projects to demonstrate compliance with the Environmental Protection Agency (EPA) and state agencies’ ambient air quality requirements under the Clean Air Act and state air pollution laws. ECCI experience includes projects to integrate air dispersion modeling into human health and ecological risk assessments to address over one hundred air toxics from a single facility. ECCI engineers have developed procedures to help define enforceable permit limits to control off-site concentrations of criteria pollutants and hazardous air pollutants to allow successful air dispersion modeling demonstrations while retaining reasonable operational flexibility at the source facilities. ECCI engineers have experience with specialty models and protocols to address unique operations and the associated air emissions including using the United States Army Open Burn and Open Detonation Model at multiple facilities. ECCI engineers have combined actual ambient air monitoring results with conventional air dispersion models to demonstrate off-site compliance in complex situations. ECCI’s industry and regulatory experience allows ECCI engineers to develop modeling protocols which reflect real-world operation while retaining the client’s ability to operate cost effectively and flexibly. Example Projects: Atlantic Research Corporation - Arkansas and Virginia ECCI has completed complex air dispersion modeling projects with HAP emissions from multiple sources and risk assessment driven off-site limitations for emissions from open detonation of waste rocket propellants. These projects utilized standard EPA modeling proto-cols as well as the United States Army Open Burn and Open Detonation Model.
Reynolds Metals Company - Gum Springs, Arkansas ECCI completed complex HAP and criteria modeling for the Reynolds Metals hazardous waste aluminum potliner incinerator facility. The modeling was integrated into Baseline Risk Assessment for hazardous waste combustors.
3M Corporation - Little Rock, Arkansas ECCI completed an integrated air dispersion modeling project which combined use of ambient air monitoring data and standard EPA modeling for multiple sources. The project included development of reasonable operational assumptions concerning blasting operations at a mining facility associated with the 3M roofing granules production facility.
Weyerhaeuser – Malvern, Arkansas ECCI completed complex air dispersion modeling focusing on removal efficiencies of air pollution control equipment and exposure to air toxics. The project also involved addition of air pollution control systems and demonstration of netting offset under PSD procedures.
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