SLIDE 22 Allegheny County Department of Aviation Activity Runway Maintenance: Airfield Deicing and Anti-icing
Potential Spill Potential Spill Deicing/Anti-icing Materials Purchasing Department Field Maintenance Department Field Maintenance Department The Field Maintenance Department conducts deicing
- perations with two established procedures. Deicing
- perations are initiated with anti-icing activities which are
conducted in anticipation of freezing rain. Anti-icing involves the application of potassium acetate to the entire
- airfield. Depending on conditions, potassium acetate is
distributed at a rate of 1 to 3 gals. per 1,000 sq. ft. Ramps are each sprayed with 4,000 to 6,000 gals. of potassium acetate, while approx. 8,000 gals. are used for runways and taxiways. In the event that mechanical removal methods are insufficient to remove all ice from the airfield, the Field Maintenance Department utilizes airfield deicing
- procedures. These operations involve the dispersion of
sodium acetate/sodium formate/urea over ramps. Spent and residual deicing/anti- icing materials flow overland into stormwater drains to discharge to the storm sewer system. Stormwater Contact Liquid Waste Air Emissions Stormwater impacted through contact with deicing materials flows overland into stormwater drains to discharge to the storm sewer system.
Runway Pavement
Indoor Storage Airfield deicing/anti-icing materials are stored in the Quonset Hut
- Sodium acetate (Approx. 300 to 400 tons stored)
- Sodium formate (Approx. forty 1 ton bags stored)
- Urea (Approx. 200 tons stored)
Potential Spill Deicing/Anti- icing Material Purchasing Department Field Maintenance Department Storage Tanks
- Three 20,000 gal. Potassium Acetate AST (Tank
ID No. 02-12108 009A, other Tank IDs unknown)
- 10,000 gal. Potassium Acetate AST (Tank
ID No. 02-12108 013A) Potential Leak Operations Department Monitors de-icing/anti-icing events to ensure activities are conducted safely. Potential Spill Air Emissions
Drawing No. 5
