Search Results - Washington State Department of Ecology

Remedial Investigation Report template

This document is a suggested template to use when preparing a remedial investigation report for an environmental cleanup. It is designed to meet the requirements of the Model Toxics Control Act described in 173-340-350(7) and 173-340-840 of the Washington State Administrative Code. This suggested template is not required.

https://ecology.wa.gov/remedialinvestigationtemplate

Letter to Chairman Barrossa Senate Committee on Environment and Public Works

A letter from the Washington Department of Ecology, signed by Director Maia Bellon, to Senators John Barrsso and Tom Carpenter, Chairman and ranking member of the Senate Environment & Public Works Committee, respectively, setting the record straight on why a water quality certification was denied to Millennium Bilk Terminals - Longview.

https://ecology.wa.gov/letter-to-chairman-barrossa

Application of Water Quality Criteria to Brackish Waters

Chapter 173-201A of the Washington Administrative Code (WAC), the Surface Water Quality Standards (standards) contains the description of the designated uses associated with each waterbody in the state. Special circumstances that require further instructions to determine which numeric criteria apply to a designated use category are guided by the rules in subsection 260(3).

https://ecology.wa.gov/applicationwqcriteriabrackishwaters

Preliminary Draft - Summary - Deferred UST Compliance Dates (WAC 173-360; WAC 173-360A) 07/10/17

This table summarizes the dates by which owners and operators of previously deferred underground storage tank (UST) systems installed on or before the effective date of the UST rule would need to comply with the requirements of the preliminary draft of WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/preliminary-draft-summary-prev-deferred-compli

Water Decontaminator

Ecology finds this water decontaminator is functionally equivalent to the catch basin insert for stormwater control. While this product does not meet Washington's water quality performance criteria, it may be used in retrofit or construction situations to provide some level of TSS removal for stormwater.

https://ecology.wa.gov/invreshpaoluccio

Summary Table: Operation and Maintenance Compliance Dates (WAC 173-360; WAC 173-360A) 01/24/18

This table summarizes the dates by which owners and operators of underground storage tanks (UST) systems installed on or before the effective date of the proposed rule, Chapter 173-360A WAC, would need to comply with the new operation and maintenance requirements specified in Part 4 of the rule.

https://ecology.wa.gov/summary-table-operation-and-maintenance-complianc

Summary Table: Previously Deferred UST System Compliance Dates (WAC 173-360; WAC 173-360A) 01/24/18

This table summarizes the dates by which owners and operators of previously deferred underground storage tank (UST) systems installed on or before the effective date of the proposed rule, Chapter 173-360A WAC, would need to comply with the requirements of the rule.

https://ecology.wa.gov/summary-table-previously-deferred-ust-system-comp

Splash Boxx Functional Equivalency

Ecology finds Splash Boxx treatment system is functionally equivalent to a Bioretention Facility (rain garden) when using approved Bioretention Soil Media for stormwater management and must adhere to the guidelines for Bioretention areas found in Best Management Practice T7.30.

https://ecology.wa.gov/splash-boxx

Tigerfloc Functional Equivalency

Ecology finds Tigerfloc functionally equivalent to the flocculent chemicals identified in Best Management Practice C250 (Construction Stormwater Chemical Treatment) for stormwater management. Contractors may use Tigerfloc as a replacement for other approved chemicals such as ChitoSan Acetate when operating an enhanced sand filtration system on construction sites.

https://ecology.wa.gov/tigerflockfunctionallyequivalent

Aquatic Noxious Weed Control NPDES General Permit

The general permit covers the indirect discharge of herbicides, adjuvants, and marker dyes into estuaries, marine areas, wetlands, along lake shorelines, rivers, streams, and other wet areas to manage Spartina and freshwater noxious weeds in Washington. An indirect discharge occurs when there may be incidental overspray or dripping of a chemical from the treated plants into waters of the state.

https://ecology.wa.gov/noxiouspermitfinal050712

Skamania County Cumulative Impacts Analysis and No Net Loss Report

An analysis of the cumulative impacts that may be expected to occur over time as the comprehensively updated SMP is implemented and this report addresses whether the SMP achieves no net loss of shoreline ecological functions.

https://ecology.wa.gov/skamania-county-cumulative-impacts-analysis-and-no

Cosmopolis Cumulative Impacts and Analysis and No Net Loss Report

An analysis of the cumulative impacts that may be expected to occur over time as the comprehensively updated SMP is implemented and No Net Loss report ddresses whether the SMP achieves no net loss of shoreline ecological functions.

https://ecology.wa.gov/cosmopolis-cumulative-impacts-and-analysis-and-no

Guide to Changes in the 2016 Sand & Gravel General Permit

This guide provides information on what has changed between the 2011 and 2016 Sand & Gravel General Permit. The guide is setup by permittee categories and NAICS / Ecology Codes. Refer to the appropriate categories below for your business (more than one category may apply to your operations). This document is only intended as a guide. Refer to the permit for more information.

https://ecology.wa.gov/changesguide2016

CSWGP High Turbidity/Low Transparency Reporting

Sites covered under the Construction Stormwater General Permit (Permit) must take specific reporting and adaptive management actions in order to comply with permit requirements when obtaining high turbidity results (greater than or equal to 250 Nephelometric Turbidity Units (NTUs)) or low transparency results (less than or equal to 6 centimeters).

https://ecology.wa.gov/highturbidity

Sand and Gravel General Permit 2011 Antidegradation Plan

Tier II Antidegradation Plan. A Tier II analysis is required when new or expanded actions are expected to cause a measurable change in the quality of a receiving water that is of a higher quality than the criterion designated for that waterbody [WAC 173-201A-320(1)].

https://ecology.wa.gov/sandantideg081711

SEPA determination of nonsignificance

This document is a determination of nonsignificance (DNS) in which Ecology has determined the proposed biosolids general permit will not have a probable significant adverse impact on the environment.

https://ecology.wa.gov/sepa-determination-of-nonsignificance-26201b433614b0478c7dbc8114f0a4ba

US Army Camp Bonneville cleanup

Comment Period: Nov. 1, 2025, 5 p.m. - Dec. 31, 2025, 5 p.m.
We regularly visit and review sites that have remaining contamination to ensure the cleanup is still protecting people and the environment. We visited the Camp Bonneville cleanup site in December 2024 and May 2025.

https://ecology.wa.gov/events/tcp/camp-bonneville/us-army-camp-bonneville-cleanup-site

2025 Triennial Review Public Hearing

Public Event: April 15, 2025, 5:30 p.m., in Online Public Hearing
We invite you to attend this public workshop and hearing on the Triennial Review of Washington's surface water quality Standards.

https://ecology.wa.gov/events/wq/water-quality-standards-triennial-review/public-hearing-sept-9

Bellingham Mitigation Bank NWS-2019-998 — Public comment period

Comment Period: Oct. 16, 2025, 12 a.m. - Nov. 15, 2025, 11:59 p.m.
The City of Bellingham proposes to establish and operate a wetland bank in Whatcom County.

https://ecology.wa.gov/events/sea/wetland-banks/bellingham-mbi-pn

Naval Radio Station Jim Creek

Comment Period: Oct. 14, 2025, 12 a.m. - Nov. 14, 2025, 11:59 p.m.
We are seeking feedback on what water quality conditions we should consider for the Naval Radio Station Jim Creek 401 certification.

https://ecology.wa.gov/events/wq/401-certifications/naval-radio-station-jim-creek

Organics management, Chapter 173-350 WAC

Comment Period: Jan. 14, 2025, 12 a.m. - March 31, 2025, 11:59 p.m.
We are starting the rulemaking process to update Washington's organic materials management regulations under Chapter 173-350 WAC Solid Waste Handling Standards.

https://ecology.wa.gov/events/rulemaking/173-350-wac-organics/173-350-wac-organics

July Local Government Sounding Board

Public Event: July 21, 2025, 1 p.m., in online webinar

https://ecology.wa.gov/events/rulemaking/173-26-and-173-27-wac-shoreline-management-act/julylgsb

December Local Government Sounding Board

Public Event: Dec. 15, 2025, 1 p.m., in Online webinar

https://ecology.wa.gov/events/rulemaking/173-26-and-173-27-wac-shoreline-management-act/declgsb-805383d98247e5e39a413ead50dc4fa6

Early Public Feedback

Comment Period: Oct. 30, 2025, 9 a.m. - Nov. 14, 2025, 11:59 p.m.
Ecology invites your thoughts on the current Fresh Fruit Packing General Permit and what you’d like to see in the next version of the permit.

https://ecology.wa.gov/events/wq/fresh-fruit-packing-general-permit/ffpgp-earlyfeedback

Eastside Fire & Rescue headquarters property cleanup site

Public Event: Nov. 5, 2025, 5 p.m., in Issaquah, WA
Drop in during a two-hour open house to learn more about this cleanup site and speak with staff from the City of Issaquah, Eastside Fire & Rescue, and Ecology. While no formal presentation is planned, handouts and visuals will be available.

https://ecology.wa.gov/events/tcp/efr-hq-ives/efr-hq-ives-open-house

Chapter 173-333 WAC

This is the rulemaking page for Chapter 173-333 WAC, Chemical Action Plans.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-333-oct15

Chapter 173-201A WAC (Human Health Criteria)

This is the rulemaking page for Chapter 173-201A WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-201a-hhc

Chapter 173-305 WAC

This is the rulemaking page for Chapter 173-305 WAC

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-305

Chapter 173-331 WAC

This is the rulemaking page for Chapter 173-331 WAC, Vehicle Battery Recycling.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-331-dec15

Lincoln Rock Hydrogen Facility

Comment Period: April 29, 2025, 12:01 a.m. - June 5, 2025, 11:59 a.m.
State Waste Discharge Permit Application

https://ecology.wa.gov/events/swm/lincoln-rock-hydrogen-facility/lincoln-rock-hydrogen-facility

Informational Webinar

Public Event: Nov. 5, 2025, 10 a.m., in Online Webinar
We are hosting a webinar where we will discuss our process and provide an overview of chapters available to comment on.

https://ecology.wa.gov/events/wq/voluntary-clean-water-ag-guidance/informational-webinar

National Pollutant Discharge Elimination System (NPDES) permit renewal and fact sheet

Comment Period: Oct. 29, 2025, 12:01 a.m. - Dec. 10, 2025, 11:59 p.m.
We invite you to review and comment on the draft National Pollutant Discharge Elimination System (NPDES) permit renewal and Fact Sheet for U.S. Oil and Refining Co. in Tacoma (Pierce County) from 12:01 am, October 29 through 11:59 pm, December 10, 2025.

https://ecology.wa.gov/events/swm/u-s-oil/u-s-oil-tacoma-national-pollutant-discharge-system-and-fact-sheet

Chapter 173-224 WAC – Water Quality Permit Fees

This is the rulemaking page for Chapter 173-224 WAC

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-224

WestRock Mill, Tacoma

Comment Period: April 23, 2025, 12 a.m. - June 4, 2025, 11:59 p.m.
This is a modification of the WestRock Tacoma water quality permit.

https://ecology.wa.gov/events/swm/westrock-mill-in-tacoma/westrock-tacoma

Organics management, Chapter 173-350 WAC

Public Event: Feb. 6, 2025, 10 a.m., in Online only
We are starting the rulemaking process to update Washington's organic materials management regulations under Chapter 173-350 WAC Solid Waste Handling Standards.

https://ecology.wa.gov/events/rulemaking/173-350-wac-organics/173-350-wac-organics-feb6meeting

WestRock Mill in Tacoma

Public Event: May 28, 2025, 5:30 p.m., in Online webinar
An online public hearing to accept oral comments will be held on May 28, 2025 at 5:30 p.m.

https://ecology.wa.gov/events/swm/westrock-mill-in-tacoma/westrock-tacoma-water-quality-permit

Webinar #3: Hemmed in to Cutting Loose

Public Event: May 13, 2025, 10 a.m., in Online webinar

https://ecology.wa.gov/events/swm/textile-webinar-series/textile-webinar-may-13-2025

Organics management, Chapter 173-350 WAC

Comment Period: June 24, 2025, 12:01 a.m. - Aug. 3, 2025, 11:59 p.m.
We are starting the rulemaking process to update Washington's organic materials management regulations under Chapter 173-350 WAC Solid Waste Handling Standards.

https://ecology.wa.gov/events/rulemaking/173-350-wac-organics/173-350-wac-organics-45eba1a92773a1ec3ffcf95175218ffb

August Virtual Open House

Public Event: Aug. 19, 2025, 6 p.m., in online webinar
Join our Virtual Open House on August 19 from 6 p.m. - 7 p.m.

https://ecology.wa.gov/events/rulemaking/173-26-and-173-27-wac-shoreline-management-act/virtualopenhouseaugust19

October Virtual Open House

Public Event: Oct. 21, 2025, 6 p.m., in online webinar
Join our Virtual Open House on October 21 from 6 p.m. - 7 p.m.

https://ecology.wa.gov/events/rulemaking/173-26-and-173-27-wac-shoreline-management-act/octobervirtualopenhouse

December Virtual Open House

Public Event: Dec. 16, 2025, 6 p.m., in online webinar
Join our Virtual Open House on December 16 from 6 p.m. - 7 p.m.

https://ecology.wa.gov/events/rulemaking/173-26-and-173-27-wac-shoreline-management-act/decembervirtualopenhouse

Amendment to Instream Resources Protection Program rules for, WRIA 7, 8, 13, 14, 15

Public Event: Oct. 9, 2025, 6 p.m., in Online webinar
Ecology is holding a virtual meeting about the rulemaking for chapters 173-507, 173-508, 173-513, 173-514, and 173-515 WAC.

https://ecology.wa.gov/events/wr/rulemaking-173-507-508-513-514-515/oct-9-virtual

Amendment to Instream Resources Protection Program rules for, WRIA 7, 8, 13, 14, 15

Public Event: Oct. 8, 2025, 2 p.m., in Online webinar
Ecology is holding a virtual meeting about the rulemaking for chapters 173-507, 173-508, 173-513, 173-514, and 173-515 WAC

https://ecology.wa.gov/events/wr/rulemaking-173-507-508-513-514-515/oct-8-virtual

Amendment to Instream Resources Protection Program rules for, WRIA 7, 8, 13, 14, 15

Comment Period: Sept. 10, 2025, 12 a.m. - Oct. 17, 2025, 11:59 p.m.
Ecology is conducting rulemaking to amend five chapters of instream resource protection rules and hosting an informal comment period during the development phase of the rulemaking.

https://ecology.wa.gov/events/wr/rulemaking-173-507-508-513-514-515/informal-comment-period

Recycling Reform Act

Public Event: Oct. 7, 2025, 10 a.m., in Online webinar

https://ecology.wa.gov/events/swm/recycling-reform-act/recycling-reform-act-kickoff-webinar-10-7-25

Development Schedules for Water Right Changes and Transfers (POL-1280)

Comment Period: Oct. 21, 2025, 12 a.m. - Dec. 5, 2025, 11:59 p.m.
You are invited to review the draft update of POL-1280, Development Schedules for Water Right Changes and Transfers Policy and Interpretive Statement and share your comments with us.

https://ecology.wa.gov/events/wr/wrp-policy/pol-1280-fall-2025

Cleanup Plan Prioritization comment period

Comment Period: Oct. 23, 2025, 12 a.m. - Nov. 28, 2025, 11:59 p.m.
We want your feedback on our current and proposed water cleanup work.

https://ecology.wa.gov/events/wq/annual-public-tmdl-arp-prioritization-webinar/tmdl-arp-plan-prioritization-public-webinar-9830fd7ef7b943c90b81920fff576ac9

Microsoft EAT02-09 Data Center Campus Revised Permit Application

Comment Period: Oct. 23, 2025, 12 a.m. - Nov. 30, 2025, 11:59 p.m.
We invite you to comment on revised permit application ST0501334.

https://ecology.wa.gov/events/wq/waste-discharge-permits-2e5ab73db877bfab36ddd36a6a436930/microsoft-eat02-09-data-center-campus

November Virtual Open House

Public Event: Nov. 17, 2025, 6 p.m., in online webinar
Join our Virtual Open House on November 18 from 6 p.m. - 7 p.m.

https://ecology.wa.gov/events/rulemaking/173-26-and-173-27-wac-shoreline-management-act/novembervirtualopenhouse

Chapter 173-04 WAC

This is the rulemaking page for Chapter 173-04 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-04