Page 110 - California Stormwater Workshop Handouts

Industrial General Permit Fact Sheet

Dischargers may need to implement additional monitoring for any applicable parameters
(Section XI.B.6.e). Appendix 3 of this General Permit includes the water bodies with
303(d) impairments or TMDLs for pollutants that are likely to be associated with
industrial storm water in black font, and those that are not likely to be associated with
industrial storm water in red font. This determination is based on the pollutant or
pollutants that are causing each impairment, and the State Water Board’s general
experience regarding the types of pollutants that are typically found in industrial storm
water discharges. The list of waterbodies is from the State Water Boards statewide
2010 Integrated CWA Section 303(d) List / Section 305(b) Report.

Some of the water bodies with 303(d) impairments or TMDLs listed in Appendix 3 of this
General Permit are not applicable to Dischargers covered under this General Permit.
Appendix 3 indicates these water bodies Dischargers are not required to include in their
pollutant source assessment (unless directed to do so by the Regional Water Board).

New Dischargers (as defined in Attachment C) applying for NOI coverage under this
General Permit that will be discharging to an impaired water body with a 303(d) listed
impairment are ineligible for coverage unless the Discharger submits data and/or
information, prepared by a QISP, demonstrating that the facility will not cause or
contribute to the impairment. Section VII.B of this General Permit describes the three
different options New Dischargers have for making this determination. This General
Permit requires a QISP to assist the New Discharger with this determination because
individuals making this determination will need expertise in industrial storm water
pollutant sources, BMPs and a thorough understanding of complying with U.S. EPA’s
storm water regulations and this General Permit’s requirements. Not requiring New
Dischargers to have a QISP assist in this demonstration would possibly lead to costly
retrofits or closure of a new facility that has not demonstrated that the facility will not
cause or contribute to the impairment.

G. Discharges Subject to the California Ocean Plan

1. Discharges to Ocean Waters

On October 16, 2012 the State Water Board amended the California Ocean Plan
(California Ocean Plan) to require industrial storm water Dischargers with outfalls
discharging to ocean waters to comply with the California Ocean Plan’s model
monitoring provisions. The amended California Ocean Plan requires industrial storm
water dischargers with outfalls discharging to ocean waters to comply with the
California Ocean Plan’s model monitoring provisions. These provisions require
Dischargers to: (a) monitor runoff for specific parameters at all outfalls from two
storm events per year, and collect at least one representative receiving water
sample per year, (b) conduct specified toxicity monitoring at certain types of outfalls
at a minimum of once per year, and (c) conduct marine sediment monitoring for
toxicity under specific circumstances (California Ocean Plan, Appendix III). The
California Ocean Plan provides conditions under which some of the above
monitoring provisions may be waived by the Water Boards.

This General Permit requires dischargers with outfalls that discharge to ocean
waters to comply with the California Ocean Plan’s model monitoring provisions and

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