Stormwater Pollution Prevention Plan - Phoenix Sky Harbor ...

Section 5 - Description of Control Measures
Stormwater pollution prevention CMs include processes, procedures, schedules of
activities, prohibitions on practices, and other management practices that prevent or
reduce the discharge of pollutants to Waters of the United States (MSGP-2010).
5.1 Selection of Control Measures
MSGP-2010 Part 2.1.1 requires that COPAD and co-permittees assess the type and
quantity of pollutants likely to be discharged in stormwater or allowable nonstormwater
from the facility when designing and implementing CMs. The CMs are
required to incorporate one or more of the following principles:
• Preventing stormwater from coming into contact with polluting materials is generally
more effective, and less costly, than trying to remove pollutants from stormwater.
• Using CMs in combination is more effective than using CMs in isolation for
minimizing pollutants in the facility’s stormwater discharge.
• Minimizing impervious areas at the facility and infiltrating stormwater at the facility
can reduce runoff and improve groundwater recharge and stream base flows in local
streams, although care must be taken to avoid groundwater contamination.
• Attenuating flow using open vegetated swales and natural depressions can reduce instream
impacts of erosive flows.
• Conserving and/or restoring of riparian buffers help protect streams from
stormwater runoff and improve water quality.
• Using treatment interceptors may be appropriate in some instances to minimize the
discharge of pollutants.
COPAD has developed CMs based on the requirements and guidelines of the MSGP-
2010 (Part 2.1) and specific operational requirements that address pollutants originating
from regulated activities. COPAD has taken into consideration the quantity and nature
of the pollutants and their potential to impact the water quality of the receiving waters
in selection of CMs.
5.2 Control Measures
MSGP-2010 lists specific structural and non-structural types of CMs that must be
considered for implementation. This section describes how each is or will be
implemented. The specific CMs identified in the MSGP-2010 were determined to be
appropriate for COPAD facilities. This section of the SWPPP includes a description of
the CMs listed in MSGP-2010, Part 2.1. COPAD has further identified some of these CMs
with the specific activities that have potential to degrade stormwater, as described in
Section 4 above. The MSGP-2010 requires that COPAD consider and implement CMs in
the following general categories:
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