The Town of Orangeville, Ontario has experienced tremendous growth and continues to be subject to growth pressures due to its close proximity to the Greater Toronto Area (GTA). This pressure has created the need for the Town to review is sewage treatment strategies and consider options for greater capacity in the future.
The Town of Orangeville Water Pollution Control Plant (WPCP) provides advanced treatment for sanitary wastewater generated by the Town. Burnside was retained to complete the Air Section of the Environmental Compliance Approval (ECA) Application and the supporting Emission Summary and Dispersion Modeling (ESDM) Report, which address potential odour impact on the surrounding area.
To complete this ECA, Burnside consulted with the client to evaluate their individual needs and to determine the approval that would best suit their requirements. To eliminate the need for the Town to undergo an additional amendment process in 2020, Schedule 3 standards (more stringent) were applied in advance of when they would normally apply.
Odour emissions from various sources at the site, had been measured previously. Burnside modelled the odour impacts at the site using AERMOD (a three module atmospheric dispersion modeling system) to determine the odour impact. Current and future odour impacts were modeled allowing for the impact of the new equipment to the facility to be compared to the current situation.
The model results were compared to the Ministry of the Environment and Climate Change (MOECC) standards, Ambient Air Quality Standards and Jurisdictional Screening Level List (JSL), and it was determined that the addition of the new process tanks had very low impact.
Burnside prepared the ESDM report and supplementary documents required for the submission of an Environmental Compliance Approval (Air) to the MOECC.
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