Stormwater Pollution Prevention Plan - Phoenix Sky Harbor ...

Non-mining MSGP 2010 General Permit
8.F.5
Inactive and Unstaffed Sites – Conditional Exemption from No Exposure Requirements.
Permit holders of inactive and unstaffed Sector F facilities (SIC 3312 – 3399) may qualify for
reduced inspections and monitoring provisions of the no exposure provisions of Parts 4.1.3,
4.2.3 and 6.2.1.4, without certifying “there are no industrial materials or activities exposed to
stormwater”. This exemption is conditioned on the following:
At a minimum, the permittee shall implement the following control measures to meet the no
exposure requirements:
o Ensure that all process and material handling equipment (e.g., conveyors, cranes,
and vehicles) are safeguarded against leaks, drips, or the potential loss of material;
and that material storage areas (e.g., piles, bins, or hoppers for storing coke, coal,
scrap, or slag, as well as chemicals stored in tanks and drums) are kept in
appropriate containers and within containment if applicable to ensure against
material losses due to wind or stormwater runoff;
o Ensure valves are closed and secured;
o Good housekeeping measures as outlined in the facility’s SWPPP, and in
accordance with Part 2.1.1.2, such as: ensure materials are properly labeled, clean
up trash, debris and other materials;
o Ensure the site is secured, such as locking entrance gates;
o Material stockpiles shall be protected from erosion and/ or downstream catchments
are installed and maintained.
If circumstances change and the facility becomes active and/or staffed, this exemption no
longer applies and the permittee shall immediately begin complying with the applicable
benchmark monitoring requirements as if the facility were in the first year of permit
coverage, including the wet season visual assessment requirements; and
ADEQ retains the authority to revoke this exemption and/or the monitoring waiver where it
is determined that the discharge causes, has a reasonable potential to cause, or contribute
to an exceedance of an applicable water quality standard, including designated uses.
Subject to the two conditions above, if the facility is inactive and unstaffed, the permittee is
waived from the requirement to conduct wet season visual assessments and benchmark
monitoring. The quarterly routine facility inspections are reduced to one routine facility
inspection and one CFI each calendar year. These inspections shall be conducted in the
opposing wet seasons and at least three months apart. The permittee shall also inspect the site
whenever there is a reasonable expectation that severe weather or natural disasters may have
damaged control measures or increased discharges.
8.F.6 Sector-Specific Benchmarks. (See also Part 6.)
Subsector
(Facility discharges may be subject to
requirements for more than one
sector/subsector)
Subsector F1. Steel Works, Blast Furnaces,
and Rolling and Finishing Mills
(SIC 3312-3317)
Subsector F2. Iron and Steel Foundries
(SIC 3321-3325)
Table 8.F-1
Parameter
Total Aluminum
Total Zinc 1
Total Aluminum
Total Suspended Solids (TSS)
Total Copper 1
Total Iron
Total Zinc 1
Benchmark Monitoring
Concentration
0.75 mg/L
Hardness Dependent
0.75 mg/L
100 mg/L
Hardness Dependent
1.0 mg/L
Hardness Dependent
Stormwater Discharges Associated with Industrial Activity – Sector F 47