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Municipal
 Phase II MS4 Enrollment Strategy
Phase I (1990 - March 9, 2003)
For
Region 3, Phase I includes only one individual permit. The City of Salinas holds
the only individual municipal storm water permit ( Salinas Municipal Permit ) in
the Central Coast Region.
Phase II (began March 10, 2003)
The
Phase II Final Rule was published in the Federal Register
on December 8, 1999. The SWRCB adopted general permits
for Phase II Regulated Small MS4s in 2003. On March 10, 2003, operators of Phase II Regulated
Small MS4s were required
to obtain permit coverage.
Phase II Small MS4 General
Permit
Phase
II Regulations required automatically designated small
MS4s to obtain coverage under a State Board issued
general permit by March 10, 2003. An automatically
designated small MS4 is any unpermitted Municipal
Separate Storm Sewer System (MS4) located in an Urbanized
Area (UA), as defined by the Bureau of the Census
(an area of population of 50,000 and a population
density of 1,000/square mile). These are listed in
Attachment 1 of the permit that can be found on the
Phase II Small MS4 General
Permit link listed below.
A
small MS4 could be designated to be covered by the
Phase II permit if it is located in an Urban Cluster
(UC), as defined by the Bureau of the Census, or meets
one or more of the designation criteria listed in
the permit itself. These are listed in Attachment
2 of the permit that can be found on the Phase II Small MS4 General
Permit link listed below. California urbanized area maps.
Federal
and State facilities such as universities, military bases, hospitals, and school districts (also known as non-traditional MS4s) located within a designated
MS4, or within a UA or a UC are also required to
obtain permit coverage, either individually, or as
a co-permittee with a/the contiguous municipality(s).
These are listed in Attachment 3 of the permit that
can be found on the Phase II Small MS4 General
Permit link listed
below.
Phase II Small MS4 General
Permit
Region 3 Phase II MS4 Designees
Link to SWRCB Municipal Program web page
Model
Urban Runoff Program Document
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