ECO-3 Protecting Our Soil, Water & Air
Erosion & Sediment Control Training & Site Supervision
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ECO-3 Protecting Our Soil, Water & Air Erosion & Sediment Control Training & Site Supervision
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EPA Stormwater
Requirements in the State of Washington
EPA Construction
General Permit (CGP) Section 9
4. WAR10000F:
Federal Facilities in the State of Washington, except those located on Indian
Country
b)
You must apply all known available and reasonable methods of prevention,
control and treatment (AKART), including the preparation and implementation of
an adequate Stormwater Pollution Prevention Plan (SWPPP), with all appropriate
BMPs installed and maintained in accordance with the SWPPP and the terms and
conditions of this permit.
c)
Stormwater BMPs must be properly designed, constructed, maintained and
operated to:
i)
Prevent pollution of state waters and protect water quality, including
compliance with applicable state water quality standards;
ii)
Satisfy state requirements for all known available and reasonable methods
of prevention, control and treatment (AKART) of wastes (including construction
stormwater runoff) prior to discharge to waters of the state; and
iii)
Satisfy the federal technology-based treatment requirements under 40 CFR
part 125.3.
d)
You must document the technical
basis for the design criteria used to select and design your stormwater
management BMPs. You must document within your Stormwater Pollution Prevention
Plan (SWPPP) how stormwater BMPs were selected, the pollutant removal
performance expected from the BMP being selected, the technical basis
(scientific, technical studies, and/or modeling) which support the performance
claims for the BMPs being selected, and an assessment of how the selected BMP
will comply with state water quality standards,
satisfy the state AKART requirements, and satisfy the federal technology-based
treatment requirements.
If you choose to follow the stormwater
management practices contained in stormwater technical manuals approved by
Washington State, including the proper selection, implementation and maintenance
of appropriate BMPs, you are presumed to have satisfied this demonstration
requirement and do not need to include within the SWPPP the technical basis
which support the performance claims for the BMPs being used. The SWPPP must
include a reference to the manual used. Approved stormwater technical manuals
include:
i)
Stormwater Management Manual for Western Washington, August
2001, for sites west of the crest of the Cascade Mountains;
ii)
Stormwater Management Manual for Eastern Washington,
(completion expected in the fall of 2003) for sites east of the crest of the
Cascade Mountains; or
iii)
Other equivalent stormwater management guidance documents
approved by Ecology.
e)
Stormwater discharges from construction sites which disturb 5
acres or more (40 CFR part 122.26(b)(14)(x)) and which discharge to surface
waters listed as impaired by the state under Section 303(d) of the Clean Water
Act for turbidity, fine sediment, high pH, and/or phosphorus are subject to an
effluent limitation that is equal to the applicable water quality standards at
the point of discharge. If impairment is due to turbidity and/or fine sediment,
the turbidity at the point of discharge shall not exceed the background
(upstream) turbidity of the receiving water.
i)
Effluent limitations apply to direct discharges to listed
waterbodies as well as indirect discharges via a stormwater conveyance system.
ii)
All references and requirements associated with Section
303(d) of the Clean Water Act shall use the most current listing by Ecology of
impaired waters that exists at the time of application for coverage under this
permit
f)
Stormwater discharges from construction sites which disturb 5
acres or more (40 CFR part 122.26(b)(14)(x)) and which discharge to surface
waters for which there is a total maximum daily load (TMDL) allocation or other
control plan that addresses sediment (including turbidity, fine sediment, total
suspended solids or siltation), high pH, or phosphorus must be consistent with
the requirements in the approved TMDL or applicable control plan. Control plans
may be total maximum daily load (TMDL) determinations, restrictions for the
protection of endangered species, ground water management plans, or other
limitations that regulate or set limits on discharges to a specific waterbody or
groundwater recharge area.
Information on impaired waterways is available from the Department
of Ecology web site at:
http://www.ecy.wa.gov/programs/wq/stormwater.
You may also contact the Department of Ecology for more information about
impaired waterways at:
Mailing Address:
Department of Ecology
Stormwater Unit
PO Box 47600
Olympia, WA 98504-7600
Department of Ecology
300 Desmond Drive
Lacey, WA 98503
Phone: 360-407-6000
5.
WAR10000I: Indian country within the State of Washington
a)
Puyallup
Tribe of Indians. The following conditions apply only for projects on the Puyallup
Reservation:
i)
Each operator shall be responsible for achieving compliance
with the Puyallup Tribe’s Water Quality Standards.
ii)
Each operator shall submit all Pollution Prevention Plans to the Puyallup
Tribe Environmental Department for review and approval prior to beginning any
discharge activities.
iii)
Each operator shall submit a copy of the Notice of Intent to the Puyallup
Tribal Environmental Department at the same time it is submitted to EPA.
Storm Water Pollution Prevention Plans and Notices of Intent shall be
submitted to:
Puyallup Tribe Natural Resources, Environmental Department
1850 Alexander Avenue
Tacoma, WA 98421
b)
Confederated Tribes of
the Chehalis Reservation. The following conditions apply only for projects on the Chehalis
Reservation:
i)
The operator shall be responsible for achieving compliance with the
Chehalis Tribe’s Water Quality Standards.
ii)
The operator shall submit a Storm Water Pollution Prevention Plan to the
Chehalis Tribe Department of Natural Resources for review and approval at least
thirty (30) days prior to beginning any discharge activities.
iii)
The operator shall submit a copy of the Notice of Intent to the Chehalis
Tribe Department of Natural Resources at the same time it is submitted to EPA.
iv)
Storm Water Pollution Prevention Plans and Notices of Intent shall be
submitted to:
Chehalis Tribe Department of Natural Resources
420 Howanut Road
Oakville, WA 98568
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