Stormwater Pollution Prevention Plan - Phoenix Sky Harbor ...

leaks or spills of these materials are common during maintenance activities. Copermittees
are required to report spills and respond using spill response materials or
COPAD’s street sweeper. All co-permittees except private GA tenants (i.e., private
aircraft owners) collect and dispose of their own waste materials. COPAD provides
accumulation points for the GA tenants use only. The accumulation points are for the
collection and recycling of used oils, transmission fluids, and disposal of spent solvents.
Maintenance activities represent a low potential for significant pollutant discharge at
PHX.
Some co-permittees have floor drains in maintenance areas and most have certified that
there were no illicit connections from these floor drains to the storm drain system at
their leasehold. However, illicit connections are documented at the following locations:
(1) City Hangar (which houses City of Phoenix Police Department and COPAD
Electrical Maintenance operations) ,(2) the Arizona Department of Public Safety
(AZDPS) and Salt River Project (SRP) building, and (3) the trench drains which drain the
parking lot and loading docks at West Air Cargo (WAC). The drain from the
AZPDES/SRP building discharges to an interceptor before discharging to the storm
drain system. The drains for the WAC loading dock and parking lot discharge to a
Stormceptor before entering the storm drain system. Additionally, an illicit connection
was discovered during the previous year at the Southwest Provisions hangar.
Southwest Airlines is installing a tank to withstand a 100 year flood, after the first flush
will go to an OWS. The tank installation should be complete by June 2014. Most of
these facilities are unoccupied or do not conduct maintenance or other activities that
could cause a discharge to the stormwater system. AZDPS conducts maintenance but
follows all the control measures required for AVE maintenance. There is a low potential
for pollutant discharge to the storm drain system from the floor drains at these facilities.
4.1.2 Aircraft, Ground Vehicle & Equipment Cleaning
Many co-permittees at PHX conduct aircraft washing. Wash service providers (WSPs)
are required to submit a written wash plan to PECM identifying the washing areas,
location of nearby storm drains, water retrieval/reclamation process, water
disposal/elimination method, and wash products. Most co-permittees conducting this
activity at COPAD do so at designated wash racks. Washing at designated outside areas
equipped with oil/water separators (OWSs) is only allowed with the approval of
PECM. The OWSs located at the wash areas discharge to the City of Phoenix sanitary
sewer system. Where washing must be performed outside of such facilities for large
aircraft, nearby storm drains are covered to prevent discharge and wash water is
recovered using a vacuum truck or other method. The collected wash water is
discharged to the City of Phoenix sanitary sewer via an OWS.
To minimize potential for pollutant discharges from washing activities, many copermittees
use dry-washing methods. Companies using dry wash methods are still
required to submit a wash plan and protect storm drain inlets during washing activities.
In addition to aircraft washing, many co-permittees at PHX also conduct vehicle and
equipment washing. Co-permittees conducting these activities must request and receive
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