Page 123 - California Stormwater Workshop Handouts

Industrial General Permit Fact Sheet

to reduce or prevent the presence of pollutants in their industrial storm water
discharge. In addition, due to the wide variety of facilities conducting numerous
and differing industrial activities throughout the state, this General Permit retains
the requirement from the previous permit that Dischargers establish and
implement additional BMPs beyond the minimum. Implementation of this
General Permit’s minimum BMPs, together with any necessary advanced BMPs,
will result in compliance with the effluent limitations of this General Permit
(Section V.A). All Dischargers must evaluate their facilities and determine the
best practices within their industry considering technological availability and
economic practicability and achievability to implement these minimum BMPs and
any advanced BMPs.

The State Water Board has selected minimum BMPs that are generally
applicable at all facilities. The minimum BMPs are consistent with the types of
BMPs normally found in properly developed SWPPPs and, in most cases, should
represent a significant portion of the effort required for a Discharger to achieve
compliance. Due to the diverse industries covered by this General Permit, the
development of a more comprehensive list of minimum BMPs is not currently
feasible. The selection, applicability, and effectiveness of a given BMP is often
related to industrial activity type and to facility-specific facts and circumstances.
Advanced BMPs must be selected and implemented by Dischargers, based on
the type of industry and facility-specific conditions, to the extent necessary to
comply with the technology-based effluent limitation requirements of this General
Permit.

Failure to implement all of the minimum BMPs to the extent feasible is a violation
of this General Permit. (Section X.H.1.) Dischargers must justify any
determination that it is infeasible to implement a minimum BMP in the SWPPP
(Section X.H.4.b). Failure to implement advanced BMPs necessary to achieve
compliance with either the technology or water quality standards requirements in
this General Permit is a violation of this General Permit.

p. Temporary Suspension of Industrial Activities

The exception for inactive and unstaffed sites in section 6.2.1.3 of the 2008
MSGP does not require a Discharger with a facility that is inactive and unstaffed
with no industrial materials or activities exposed to storm water (in accordance
with the substantive requirements in 40 Code of Federal Regulations section
122.26(g)) to complete benchmark monitoring. The Discharger is required to
sign and certify a statement in the SWPPP verifying that the site is inactive and
unstaffed. If circumstances change and industrial materials or activities become
exposed to storm water or the facility becomes active and/or staffed, this
exception no longer applies and the Discharger is required to begin complying
immediately with the applicable benchmark monitoring requirements under part
6.2 of the 2008 MSGP.

This General Permit allows Dischargers to temporarily suspend monitoring at
facilities where industrial activities have been suspended in accordance with
Section X.H.3. This is only intended for Dischargers with facilities where it is

Order 2014-0057-DWQ 39