Stormwater Pollution Prevention Plan - Phoenix Sky Harbor ...

Non-mining MSGP 2010 General Permit
An unauthorized discharge (e.g., discharge of non-stormwater not authorized by this or
another AZPDES permit) to a water of the U.S. or to a regulated MS4 occurs at the facility
(Part 2.1);
A discharge violates a numeric effluent limitation guideline (Table 1-1);
The permittee becomes aware, or ADEQ determines, that the facility’s discharge causes or
contributes to an exceedance of applicable water quality standard(s) (Part 2.2.2) or an
adopted waste load allocation (WLA) (Part 2.2.3); or
ADEQ, or an operator of a regulated MS4, determines that modifications to the control
measures are necessary to meet the requirements of Part 2.2.
3.1.2 Substantially Identical Outfalls
If the event triggering corrective action is linked to an outfall that represents other substantially
identical outfalls, the facility’s review must assess the need for corrective action for each outfall
represented by the outfall that triggered the review.
3.2 Corrective Action Deadlines
The permittee shall document the discovery of any of the conditions listed in Part 3.1 within 72
hours of making such discovery. Within 14 calendar days of such discovery, the permittee shall document
any corrective action(s) taken or to be taken to eliminate or further investigate the condition, or if no
corrective action is needed, the basis for that determination. The specific documentation required within
72 hours and 14 calendar days is detailed in Part 3.3. When actions are determined necessary, the
permittee shall make any necessary changes within 14 calendar days following discovery, or before the
next measurable storm event (see Part 6.1.2.2), whichever is sooner, to ensure compliance with the
applicable numeric effluent limitations in Part 2.2.1 and water quality-based requirements in Parts 2.2.2
and 2.2.3 of this permit. If necessary changes cannot be implemented within the specified timeframe(s),
the permittee shall document with the SWPPP the reasons for the delay, a schedule for completing the
necessary changes, date completed and any back-up practices in place to ensure compliance with the
applicable numeric effluent limitations in Part 2.2.1 and water quality-based requirements in Parts 2.2.2
and 2.2.3 of this permit should a runoff event occur while a control measure is off-line.
3.3 Corrective Action Report
1. Within 72 hours of discovery of any condition listed in Part 3.1, the permittee shall document
the following information, which shall be maintained with the SWPPP:
a. Identification of the condition triggering the need for corrective action review;
b. Description of the problem identified; and
c. Date the problem was identified.
2. Within 14 calendar days of discovery of any condition listed in Part 3.1, the permittee shall
document and maintain with the SWPPP the following information:
a. Summary of corrective action taken or to be taken;
b. Whether SWPPP modifications are required as a result of this discovery or corrective
action;
c. Date corrective action initiated or will be initiated; and
d. Date corrective action completed or expected to be completed.
3. When any condition listed in Part 3.1 occurs, a permittee that operates a facility that
discharges to an impaired water or OAW shall submit this documentation in an annual report
as required in Part 7.2 and retain a copy of the corrective action report onsite with the
SWPPP as required in Part 5.4.
Stormwater Discharges Associated with Industrial Activity 13