Stormwater Pollution Prevention Plan - Phoenix Sky Harbor ...

of stormwater pollution for the storage and during the transport of aircraft and vehicle
fuel.
4.1.6 Building and Grounds Maintenance
COPAD Maintenance performs apron cleaning with a mechanical street sweeper in most
areas of PHX. Wastewater from this activity is disposed of through oil/water separators
routed to the sanitary sewer system. Many co-permittees conduct floor washing at their
facilities and report that wash water is discharged to oil/water separators or directly to
the City of Phoenix sanitary sewer system. Outdoor apron and floor washing activities
do not appear to represent a significant source of non-stormwater discharges to the
storm drain system.
COPAD Park Maintenance and Airfield Maintenance personnel, licensed by the Arizona
Office of Pest Management (OPM), perform herbicide application at COPAD facilities.
Their chemicals are stored at the facility in a designated storage area. COPAD and a
small number of co-permittees contract to a service provider for application of pesticides
(service providers must be approved by the OPM). These products are generally used in
small quantities and are not stored at the facility.
The use of pesticides and herbicides at the airport does not result in significant
discharges to the land surface. During rainfall events, pesticide and herbicide residuals
at application sites may be washed into the storm drain system. However, based on the
small quantities used at the airport and the short half-life of most herbicides and
pesticides, this activity represents a low potential to impact stormwater discharges.
4.1.7 Aircraft Deicing
The deicing season at PHX is from November through February. This past deicing
season lasted from October 2012 through March 2013 at PHX (MSGP-2010, Part 8.S.5.2).
Glycol-based deicing fluids are used on aircraft to eliminate or prevent ice build-up on
the wings and fuselage of aircraft during rare cold weather conditions at PHX. In
general, this activity is performed by only a few airlines.
Due to the relatively mild and dry winter weather conditions, aircraft icing is infrequent
and generally minimal. Anti-icing to prevent icing at higher altitudes is more common
than de-icing. Deicing and anti-icing activities are limited to a few of the larger airlines
and minimal deicing fluid is used. Some airlines use hot water to deice aircraft when
the ambient air temperature is above 32 degrees Fahrenheit. Once the ambient air
temperature is below 32 degrees, airlines use diluted glycol-based deicing fluids.
Southwest Airlines uses a 50/50 mix and ServisAir uses a 55/45 mix. Some airlines,
such as Delta Airlines, push their planes back from the gates into the sun for frost to
thaw. During the last deicing season Southwest conducted deicing on their own aircraft
and ServisAir conducted deicing for the following co-permittees: US Airways, American
Airlines, Hawaiian Airlines, and SkyWest Airlines.
The primary deicing fluid used by co-permittees at PHX is propylene glycol. The
deicing fluids are typically stored in drums or totes. Deicing activities are conducted in
17