Page 118 - California Stormwater Workshop Handouts

Industrial General Permit Fact Sheet

This General Permit encourages Dischargers to utilize BMPs that infiltrate or reuse
storm water where feasible. The State Water Board expects that these types of
BMPs will not be appropriate for all industrial facilities, but recognizes the many
possible benefits (e.g. increased aquifer recharge, reduces flooding, improvements
to water quality) associated with the infiltration and reuse of storm water.
Encouraging the use of storm water infiltration and reuse BMPs is consistent with
the statewide approach to managing storm water with lower impact methods.

The BMPs in this General Permit that coincide with the control measures in the 2008
MSGP are as follows (in order as listed in the 2008 MSGP):

a. Minimization of Exposure to Storm Water

Section 2.1.2.1 of the 2008 MSGP requires Dischargers to minimize the
exposure of industrial materials and areas of industrial activity to rain, snow,
snowmelt, and runoff. The 2008 MSGP mixes both structural and nonstructural
BMPs and specifies particular BMPs to consider when minimizing exposure such
as grading/berming areas to minimize runoff, locating materials indoors, spill
clean up, contain vehicle fluid leaks or drain fluids before storing vehicles on-site,
secondary containment of materials, conduct cleaning activities undercover,
indoors or in bermed areas, and drain all wash water to a proper collection
system.

This General Permit requires the evaluation of BMPs in the potential pollutant
source assessment in the SWPPP (Section X.G.2). When the minimum BMPs
are not adequate to comply with the TBELs, Dischargers are required to
implement advanced BMPs (Section X.H.2.a). These advanced BMPs may
include additional exposure minimization BMPs (Section X.H.2.b.1).

b. Good Housekeeping

Section 2.1.2.2 of the 2008 MSGP requires that Dischargers keep all exposed
areas that may be a potential source of pollutants clean and orderly. This
General Permit (Section X.H.1.a) seeks to define “clean and orderly” by
specifying a required set of nine (9) minimum good housekeeping BMPs, which
include: observations of outdoor/exposed areas, BMPs for controlling material
tracking, BMPs for dust generated from industrial materials or activities, BMPs for
rinse/wash water activities, covering stored industrial materials/waste, containing
all stored non-solid industrial materials, preventing discharge of rinse/wash
waters/industrial materials, prevent non-industrial area discharges from contact
with industrial areas of the facility, and prevent authorized NSWDs from non-
industrial areas from contact with industrial areas of the facility.

c. Preventative Maintenance

Section 2.1.2.3 of the 2008 MSGP requires that Dischargers regularly inspect,
test, maintain, and repair all industrial equipment to prevent leaks, spills and
releases of pollutants that may be exposed to storm water discharged to
receiving waters. This General Permit (Section X.H.1.b) incorporates this

Order 2014-0057-DWQ 34