Page 60 - California Stormwater Workshop Handouts

Industrial General Permit Order

compliance with the effluent limitations of this General Permit and are
expected to eliminate future NAL exceedance(s), the Discharger
shall provide a description and analysis of all implemented BMPs;

iv. In cases where all of the Discharger’s implemented BMPs, including
additional BMPs identified in the Level 2 ERA Action Plan, achieve
compliance with the effluent limitations of this General Permit but are
not expected to eliminate future NAL exceedance(s), the Discharger
shall provide, in addition to a description and analysis of all
implemented BMPs:

1) An evaluation of any additional BMPs that would reduce or
prevent NAL exceedances;

2) Estimated costs of the additional BMPs evaluated; and,

3) An analysis describing the basis for the selection of BMPs
implemented in lieu of the additional BMPs evaluated but not
implemented.

v. The description and analysis of BMPs required in subsection a.iii
above shall specifically address the drainage areas where the NAL
exceedance(s) responsible for the Discharger’s Level 2 status
occurred, although any additional Level 2 ERA Action Plan BMPs
may be implemented for all drainage areas; and,

vi. If an alternative design storm standard for treatment control BMPs (in
lieu of the design storm standard for treatment control BMPs in
Section X.H.6 in this General Permit) will achieve compliance with
the effluent limitations of this General Permit, the Discharger shall
provide an analysis describing the basis for the selection of the
alternative design storm standard.

b. Non-Industrial Pollutant Source Demonstration

This shall include:

i. A statement that the Discharger has determined that the exceedance
of the NAL is attributable solely to the presence of non-industrial
pollutant sources. (The pollutant may also be present due to
industrial activities, in which case the Discharger must demonstrate
that the pollutant contribution from the industrial activities by itself
does not result in an NAL exceedance.) The sources shall be
identified as either run-on from adjacent properties, aerial deposition
from man-made sources, or as generated by on-site non-industrial
sources;

Order 2014-0057-DWQ 52