Reinforced Plastic Composites Plant. LMG used Aeromod complex and simple terrain modeling to determine off-site odor impacts from a reinforced plastic composites manufacturing plant. As part of this project we meet with senior Ohio EPA agency personnel to negotiate corrective actions for ongoing exceedances of PTO emission limits. Using facility-specific emission factor inputs and operational designs, we determined alternative air pollution control options that allowed the plant to keep off-site odor impact concentrations below odor threshold levels and discontinue use of carbon-absorption odor control systems which were required by a previous compliance directive. This allowed the facility to save an estimated $40,000 in O&M costs.

Rubber Parts Extruding Plant. LMG used Aeromod complex terrian modeling to optimize the minimum increased stack heights required for existing sources at a rubber parts extruding plant to comply with offsite air toxics standards without requiring additional air pollution control (APC) equipment. The modeling required incorporation and analysis of a wide range of stack scenarios that varied the number of stacks, location, air flow, and air pollutant emission rates. Based on the modeling results the plant was not required to install APC equipment and stack configurations were optimized to reduce ongoing O&M costs and reduce inital capital costs.

Medical Bandages Adhesive Coating Operation. LMG developed a compliance assurance plan for off-site nuisance odors for an adhesive coating operation manufacturing medical bandages in response to a regulatory agency. As part of the project, we conducted air emission dispersion modeling under varying operating scenarios to develop fence line odor concentrations. This baseline data was then used to evaluate various control options including exhaust stack height and velocity modifications, thermal oxidizer temperature and retention time modifications, and operating modifications. Based on this evaluation the facility was able to demonstrate to the agency that an odor control system was not necessary and that a combination of product substitutions and a modest stack height increase was appropriate to address the off-site odor impacts.