Air quality regulations in the U.S., which have reduced pollution and improved health conditions, have also resulted in increasing costs for industries as they retrofit, redesign or install new equipment to meet requirements. Collection of the right data and application of sound science are crucial steps in the engineering process that ensures a facility will meet air permit requirements in a protective and cost-effective manner.

McLane Environmental offers support services in the following areas:

• Air Modeling
• Permitting & Compliance
• Air Quality Impact Analyses
• Vapor Intrusion Modeling

By designing a program of efficient data collection and strategic analyses for each air quality project, we provide a cost-effective solution to meet our clients’ objectives. McLane Environmental analysts are experienced in performing air dispersion modeling using AERMOD, ISC3, BLP and TSCREEN to determine air concentrations at a point of compliance or receptor location of interest. We also perform air quality and vapor intrusion impact analyses using state-of-the-art modeling techniques.

Representative Experience

Our staff has directed or participated in numerous air quality projects including:

• Provided air modeling, using AERMOD and ISC3, to update Title V federal operating permits for two sites in California.
• Performed air dispersion modeling and analyses to determine the impact of sources of emissions on the air quality at a site in Arkansas.
• Compared concentration results obtained from AERMOD with previous ISC3 and BLP air dispersion modeling analyses for an industrial site in Oregon to evaluate the potential impact of the newer regulatory modeling approach.
• Collected and synthesized extensive meteorological data for a regional air model of the Powder River Basin for Wyoming DEQ.
• Performed vapor intrusion modeling using the Johnson and Ettinger model to estimate the transport of contaminant vapors from subsurface soils and groundwater into indoor spaces located directly above the source of contamination for a Brownfields redevelopment site in northern NJ.

In these and other air quality projects, a successful outcome was achieved through our selection and application of the appropriate data analysis and dispersion modeling techniques.