Deicing Storm Water Control Alternatives
Anticipating changes to its National Pollutant Discharge Elimination System storm water permit, the airport authority engaged a team (including EnSafe) to study conceptual deicing storm water control alternatives. EnSafe provided local expertise on the airport’s sanitary sewer and storm water conveyance systems for the study. EnSafe reviewed current structural controls and deicing operations to qualitatively identify constraints posed by the age and design of the drainage system on the airfield and at gate areas for the airport and a tenant hub.
EnSafe developed preliminary pretreatment options for deicing runoff assuming discharge to a city treatment plant and assessed the plant's potential capacity to accommodate the deicing runoff. Also, onsite deicing storm water treatment and recycling options were reviewed.
EnSafe assisted in development of long-term deicer application and control options by reviewing conveyance, storage, treatment, and recycling alternatives. Alternatives were evaluated with respect to future permit conditions, effluent limitation guidelines, construction and operation impacts, and estimated costs.
EnSafe also deploys crews to sample storm water runoff when deicing operations are required at the airport.
- Qualitative review of storm and sanitary sewer to identify constraints due to age and design
- Developed preliminary pretreatment options for deicing storm water runoff based on discharge to city wastewater system
- Reviewed onsite treatment and recycling alternatives for deicing runoff
- In alternatives evaluation, considered anticipated future permit conditions, effluent limitation guidelines, construction and operation impacts, and capital and operating costs