Page 117 - California Stormwater Workshop Handouts

Industrial General Permit Fact Sheet

The 2008 MSGP requires Dischargers to comply with 12 non-numeric technology-
based effluent limits in Section 2.1.2 of the permit through the implementation of
“control measures.” This requirement is an expansion of the general considerations
outlined in the MSGP adopted in 2000. The control measures specified by the U.S.
EPA in the 2008 MSGP are as follows (in order as listed in the 2008 MSGP):

1. Minimize Exposure
2. Good Housekeeping
3. Maintenance
4. Spill Prevention and Response Procedures
5. Erosion and Sediment Controls
6. Management of Runoff
7. Salt Storage Piles or Piles Containing Salt
8. Sector Specific Non-Numeric Effluent Limits
9. Employee Training
10. Non-Storm Water Discharges (NSWDs)
11. Waste, Garbage and Floatable Debris
12. Dust Generation and Vehicle Tracking of

Industrial Materials

This General Permit addresses eleven of the above twelve control measures from
the 2008 MSGP Section 2.1.2 Non-Numeric Technology-Based Effluent Limits
(BPT/BAT/BCT). Eleven of the control measures are addressed as minimum BMPs
that the State Water Board has determined to be most applicable to California’s
Dischargers. Two of those eleven control measures (1- Minimize Exposure, 6 –
Management of Runoff) are also identified as advanced BMPs (Section X.H.2 of this
General Permit). This General Permit is not a sector-specific permit and therefore
does not contain limitations to address control measure number 8 (Sector Specific
Non-Numeric Effluent Limits).

The non-structural elements of the control measure to minimize exposure are
addressed in the minimum BMP Section X.H.1 of this General Permit while structural
control elements are addressed in the advanced BMP Section X.H.2 of this General
Permit. The on-site diversion elements of the control measure to minimize exposure
are addressed as minimum BMPs.

The runoff reduction elements of the control measure to minimize exposure are
included as advanced BMPs. Advanced BMPs that are required to be implemented
when a Discharger has implemented the minimum BMPs to the extent feasible and
they are not adequate to comply with the TBELs. The advanced BMP categories
are: (1) exposure minimization BMPs, (2) storm water containment and discharge
reduction BMPs, (3) treatment control BMPs, and (4) additional advanced BMPs
needed to meet the effluent limitations of this General Permit. Advanced BMPs are
generally structural control measures and can include any BMPs that exceed the
minimum BMPs. The control measure for Non-Storm Water Discharges (NSWDs) is
addressed in both the discharge prohibitions (Section III) and authorized non-storm
water discharges (Section IV) of this General Permit and essentially represents a
minimum BMP.

Order 2014-0057-DWQ 33