Runoff from glycol deicing operations at airports is detrimental to aquatic life in rivers and streams as the decomposition of glycol occurs. At the Pittsburgh International Airport a widebody deicing facility was built in 2001. Driving the decision to construct a new facility was a consent order issued by the Pennsylvania Department of Environmental Protection, requiring the Allegheny County Airport Authority to provide an environmentally friendly deicing facility. Design objectives included: A deicing pad to accommodate two widebody aircrafts positioned side-by-side; containment and recovery of the propylene glycol used for deicing; and incorporation of Best Available Technology (BAT). The facility's concrete pad was designed to collect all surface runoff from the deicing process into a trench-drain system. Underlying the collection system is a high-density polyethylene (HDPE) smooth liner which prevents propylene glycol from migrating into subsurface soils and groundwater. The deicing facility pad design incorporates a polypropylene 16 oz./yd.2 needlepunched nonwoven placed directly above a compacted base layer of recycled crushed concrete. Above the nonwoven layer, a 60-mil HDPE smooth liner was installed. To protect the liner from being damaged by the recycled crushed concrete subbase material, a polypropylene 60 oz./yd.2 needlepunched nonwoven was placed above the Iiner. The deicing pad section above this nonwoven consists of a 14-in. recycled crushed concrete subbase, a 7-in. bituminous concrete base course, and 16 in. of Portland cement.
Airports: Preventing pollution during deicing
Umweltverträgliche Enteisung von Flugzeugen
GFR - Engineering Solutions for Roads, Soil, Water and Waste ; 21 , 1 ; 40-41
2003
2 Seiten, 3 Bilder, 2 Tabellen
Aufsatz (Zeitschrift)
Englisch
DSpace@MIT | 2001
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