Regulations & Permits - Washington State Department of Ecology

EPA Motion 063021

This is the legal motion filed.

https://ecology.wa.gov/epa-motion-063021

Error Analysis for Water Quality Policy 1-11: Pertaining to the Water Quality Assessment December 2016

Water Quality Policy 1-11 is the policy that guides listing decisions for Washington’s Water Quality Assessment to meet Clean Water Act requirements for sections 303(d) and 305(b). During updates to Policy 1-11 in 2012, several comments were received about the risk of listing errors for waters that were placed on the 303(d) list based on limited data.

https://ecology.wa.gov/erroranalysispolicy1-11

LID Briefings for Elected Officials - Eastern Washington Presentation

This is a briefing about Low Impact Development requirements of municipal stormwater permittees for elected officials in Eastern Washington.

https://ecology.wa.gov/electedbriefingsewapresentation

LID Briefings for Elected Officials - Western Washington Presentation

This is a briefing about Low Impact Development requirements of municipal stormwater permittees for elected officials in Western Washington.

https://ecology.wa.gov/electedbriefingswwapresentation

AO16-07 EPA Approval Letter

This is the letter from the EPA that states that the changes still follow the Clean Water Act and are approved.

https://ecology.wa.gov/epa-approval-letter

AO16-07 EPA Approval Tech Support Doc

This is the technical support document that goes with the EPA Approval Letter.

https://ecology.wa.gov/epa-approval-tech-support-doc

Ecology Water Quality Funded Facility Projects EPA Signage Memo

https://ecology.wa.gov/epa-signage-memo-for-cwsrf-funded-projects

Envirotac II

Letter showing Envirotac II functionally equivalent to C126 (Polyacrylamide for Soil Erosion Protection) and C140 (Dust Control) best management practices for stormwater management.

https://ecology.wa.gov/envirotac2

EarthGuard Fiber Matrix Equivalency

Ecology letter finding EarthGuard Fiber Matrix can be used as temporary erosion control mechanism.

https://ecology.wa.gov/equivalency-earthguard-bmpc120

Detalok Equivalency Letter

Letter showing Deltalok product can be used to meet Element 6 (Protect Slopes) of the Stormwater Pollution Prevention Plan for construction sites.

https://ecology.wa.gov/equivalencyletter

Ecology's Submittal Letter to EPA (WAC 173-201A) 8/01/16

This is the Ecology's Submittal Letter to EPA for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/ecology-s-submittal-letter-to-epa-wac-173-201a-8

Erosian Eel

Letter stating that Erosion EEL is equivalent to straw wattle for use in stormwater control.

https://ecology.wa.gov/erosioneel

Aquatic Noxious Weed Control NPDES General Permit Errata

Corrections and Clarifications for the Aquatic Noxious Weed Control NPDES General Permit.

https://ecology.wa.gov/erratanoxiousweedpermit

Errata for 2013-2018 Western Washington Municipal Stormwater Permits

Clarifications and corrections to Western Washington Phase II Municipal Stormwater Permit

https://ecology.wa.gov/errata2015-02

EPA letter to Washington Agencies Lower Yakima Valley

EPA letter to Washington state agencies on Lower Yakima Valley

https://ecology.wa.gov/epa-letter-to-washington-agencies-2022

Zostera japonica Management General Permit Errata and fact sheet addendum

Corrections and Clarifications on the Zostera japonica Management General Permit.

https://ecology.wa.gov/erratazjfactsheetaddendum

Errata for Draft Permits

Errata sheet for discrepencies between the blackline and redline versions of the formal draft 2019 Municipal Stormwater Permits

https://ecology.wa.gov/errata-for-redline-versions-of-the-formal-drafts

Phase I Municipal Stormwater Permit Errata

Errata issued February 2015

https://ecology.wa.gov/errata2015-02-939c377a6ff974c6559b9b0b9a3128b5