Page 93 - California Stormwater Workshop Handouts

Industrial General Permit Fact Sheet

II. TECHNICAL RATIONALE FOR REQUIREMENTS IN THIS GENERAL PERMIT

A. Receiving General Permit Coverage

1. This General Permit provides regulatory coverage for new and existing industrial
storm water discharges and authorized NSWDs from:

a. Facilities required by federal regulations to obtain an NPDES permit;

b. Facilities designated by the Regional Water Boards to obtain an NPDES permit;
and,

c. Facilities directed by the Regional Water Boards to obtain coverage specifically
under this General Permit. The Regional Water Board typically directs a
Discharger to change General Permit coverage under two circumstances:

(1) switch from an individual NPDES permit to this General Permit, or

(2) switch from the NPDES General Permit for Storm Water Discharges
Associated with Construction And Land Disturbance Activities, (Order 2009-
0009-DWQ, NPDES No CAS000002 (to this General Permit for long-term
construction related activities that are similar to industrial activities (e.g. concrete
batch plants).

40 Code of Federal Regulations section 122.26(b)(14) defines "storm water
discharge associated with industrial activity" and describes the types of facilities
subject to permitting (primarily by Standard Industrial Classification (SIC) code).
This General Permit provides regulatory coverage for all facilities with industrial
activities described in Attachment A where the covered industrial activity is the
Discharger’s primary industrial activity. In some instances, a Discharger may have
more than one primary industrial activity occurring at a facility.

The 1987 SIC manual uses the term “establishment” to determine the
primary economic activity of a facility. The manual instructs that where
distinct and separate economic activities are performed at a single location,
each activity should be treated as a separate establishment (and,
therefore, separate primary activity). For example, the United States Navy
(primary SIC code 9711) may conduct industrial activities subject to
permitting under this General Permit, such as landfill operations (SIC code
4953), ship and boat building and repair (SIC code 3731, and flying field
operations (SIC code 4581).

The SIC manual also discusses “auxiliary” functions of establishments.
Auxiliary functions provide management or support services to the
establishment. Examples of auxiliary functions are warehouses and
storage facilities for the establishment’s own materials, maintenance and
repair shops of the establishment’s own machinery, automotive repair
shops or storage garages of the establishment’s own vehicles,
administrative offices, research, development, field engineering support,
and testing conducted for the establishment. When auxiliary functions are
performed at physically separate facilities from the establishment they
serve, they generally are not subject to General Permit coverage. If

Order 2014-0057-DWQ 9