Stormwater Pollution Prevention Plan - Phoenix Sky Harbor ...

Non-mining MSGP 2010 General Permit
6.2.2 Effluent Limitations Monitoring.
6.2.2.1 Monitoring Based on Effluent Limitations Guidelines.
Table 6-1 identifies the stormwater discharges subject to effluent limitation guidelines that are
authorized for coverage under this permit. Commencing with the first wet season of permit
coverage (in accordance with Section 6.1.2.1), the permittee shall monitor once per year at
each outfall containing the discharges identified in Table 6-1 for the parameters specified in
the sector-specific section of Part 8.
Table 6-1. Required Monitoring for Effluent Limitations Based on Effluent Limitations Guidelines
Regulated Activity
Effluent Limit
Monitoring
Frequency
Sample
Type
Discharges resulting from spray down or
intentional wetting of logs at wet deck storage See Part 8.A.7 1/year Grab
areas
Runoff from phosphate fertilizer manufacturing
facilities that comes into contact with any raw
materials, finished product, by-products or
See Part 8.C.4 1/year Grab
waste products (SIC 2874)
Runoff from asphalt emulsion facilities See Part 8.D.4 1/year Grab
Runoff from material storage piles at cement
manufacturing facilities
See Part 8.E.5 1/year Grab
Runoff from hazardous waste landfills See Part 8.K.6 1/year Grab
Runoff from non-hazardous waste landfills See Part 8.L.10 1/year Grab
Runoff from coal storage piles at steam electric
generating facilities
See Part 8.O.8 1/year Grab
6.2.2.2 Substantially Identical Outfalls.
The permittee shall monitor each outfall discharging runoff from any regulated activity
identified in Table 6-1. The substantially identical outfall monitoring provisions are not
available for numeric effluent limitations monitoring.
6.2.3 Impaired Waters Monitoring.
6.2.3.1 Permittees Required to Monitor Discharges to Impaired Waters.
If a facility discharges to an impaired water, the permittee shall develop a monitoring program
in accordance with Part 6.1.3 and monitor for all pollutants for which the waterbody is
impaired (except as provided in Part 6.2.3.2) and for which a standard analytical method
exists (see 40 CFR Part 136).
If the waterbody is impaired for suspended solids, turbidity or sediment/ sedimentation and
the discharge occurs for more than 48 hours after the storm event, the permittee shall
monitor for SSC. If the pollutant for which the waterbody is impaired is expressed in the form
of an indicator or surrogate pollutant, the permittee shall monitor for that indicator or
surrogate pollutant. No monitoring is required when a waterbody’s biological communities are
impaired but no pollutant, including indicator or surrogate pollutants, is specified as causing
the impairment, or when a waterbody’s impairment is related to hydrologic modifications,
impaired hydrology, or temperature.
Stormwater Discharges Associated with Industrial Activity 29