Ecology's Index of interpretive and policy statements and Declaratory and Final Orders.
We maintain an index of declaratory orders, final orders, interpretive statements, and policy statements (see below) as required in RCW 42.56.070.
For other records, state agency records retention schedules provide a master list of the types of records we create and receive, their retention period, and disposition. The Office of the Secretary of State's Washington State Archives lists the state government General Records Retention Schedule and record retention schedules for specific state agencies, including us. Please check back for changes as items on this page are added, updated, or rescinded.
Declaratory and final orders
We don't issue declaratory orders or final orders. See RCW 43.21B.240. Declaratory orders and final orders pertaining to Ecology actions are issued by the Pollution Control Hearings Board, the Shoreline Hearings Board, and the Growth Management Hearings Board. These orders may be found on the Environmental and Land Use Hearings Office website.
To obtain copies of any of the items listed below, please click on the links below to download or to submit a request for records, including the ones listed below, visit our Public Records Requests.
- AQP-POL-2022 Data Center Permitting
- AQP-GUI-2019 AERMOD APP Review
- AQP-GUI-2020 Simplified approach to AERSCREEN
- AQP-POL-2020 How to Apply 460 Standards
- AQP-POL-2019 Cancer Risk
- AQP-POL-2019 60-day preliminary determination
- AQP-POL-2023 Evaluating Equipment Replacement
- AQP-POL-2019 Evaluating Modification
- Fugitive Dust Control Plan and Best Management Practices for Cattle Feeding Operations (Oct. 2018)
- Guidance Document: First, Second, and Third Tier Review of Toxic Air Pollution Sources (Aug. 2015)
- Guidance on Washington State's Prevention of Significant Deterioration Permitting Program (Nov. 2017)
- Focus On New Source Review: Requirements for New Sources of Air Pollution (June 2011)
- Air Quality Program: Program Specific Guidelines
- Memorandum: Determination of Application of MTCA Permit Exemption, RCW 70.105D.090 to Air Quality Program Permits
- Guidance on Permitting Emergency Generators (>500 – 2000bhp)
- Guidelines for Grain Elevators and Grain Terminals Eastern Washington Location
- Memorandum: Implementation of the Determination of Application of MTCA Permit Exemption, RCW 70.105D.090 to Air Quality Program Permits
- Better Brakes Law Policy Statement on Reporting Requirements for OESC friction material
- Marking of Original Equipment Service Contract Brakes (Jan. 8, 2018)
The Dam Safety program has statements related to the following topics:
- Dam Safety Program
- Dam construction permit process
- Dam construction inspection policies
- Dam safety compliance and enforcement
- Dam safety project operation
- Dam safety response to emergencies
- Inspection of existing dams
Dam Safety program
- Policy 5101 - Designation of state dam safety office (July 21, 1999)
- Policy 5102 - Applicability of dam safety policies and procedures (July 21, 1999)
- Policy 5103 - Applicability of policies to dams which are federally owned (July 21, 1999)
- Policy 5104 - Applicability of policies to non-federal dams which are licensed or exempted for hydropower by the Federal Energy Regulatory Commission (FERC) (July 21, 1999)
- Policy 5105 - Exemption of dams which are six feet or less in height (July 21, 1999)
- Policy 5106 - Multiple small dams in series (July 21, 1999)
Dam construction permit process
- Policy 5201 - Issuance of construction permit (July 21, 1999)
- Policy 5202 - Engineering approval of construction plans and specifications (July 21, 1999)
- Policy 5203 - Assessment and collection of fees for engineering review of construction plans and specifications and for construction inspections (July 21, 1999)
- Policy 5204 - Plan review requirements for construction change orders (July 21, 1999)
- Policy 5205 - Review of construction plans and specifications received after project construction (July 21, 1999)
- Policy 5206 - SEPA compliance as related to issuance of construction permit (July 21, 1999)
Dam construction inspection policies
- Policy 5301 - Inspection of construction work (July 21, 1999)
- Policy 5302 - Construction inspection plans by dam owners (July 21, 1999)
Dam safety compliance and enforcement
- Policy 5502 - Use of enforcement action when voluntary compliance is not forthcoming (July 21, 1999)
Dam safety project operation
- Policy 5601 - Operation and maintenance manuals and emergency action plans (July 21, 1999)
- Policy 5602 - Emergency spillway requirements at off-channel storage facilities (July 21, 1999)
Dam safety response to emergencies
- Policy 5701 - Emergency response procedures by dam safety section (July 21, 1999)
- Policy 5702 - Discretionary actions during emergency or exigency situations (July 21, 1999)
Inspection of existing dams
- Policy 5401 - Periodic inspection of existing dams - Federal Dams (July 21, 1999)
- Policy 5402 - Periodic inspection of existing dams - hydropower dams licensed or exempted by FERC (July 21, 1999)
- Policy 5403 - Periodic inspection of existing dams - Ecology sole regulatory agency (July 21, 1999)
- Policy 5404 - Frequency of periodic inspections July 21, 1999)
- Policy 5405 - Dams constructed without prior DSO approval of plans and specifications (recent construction) (July 21, 1999)
- Policy 5406 - "Older" dams which were constructed many years ago without DSO approval of plans and specifications (July 21, 1991)
- Policy 5407 - Periodic inspections of metals mining tailings impoundments (July 21, 1999)
- Interim Policy for Prepreg Waste (Dec. 31, 2018 – Dec. 31, 2025)
- Guidelines for Developing and Updating Local Hazardous Waste Plans (Feb. 2010)
- Policy 3-11 – Dangerous Waste Management Facilities: Late and/or Inadequate Applications for a Final Status Permit (Dec. 1996)
- Implementation Guidelines for Local Hazardous Waste Plans (July 1992)
- Household Hazardous Waste: Guidelines for Conducting Collection Events (Feb. 1989)
- Zoning Guidelines for Hazardous Waste Treatment and Storage Facilities (July 1987)
- Compliance Assurance Manual
- Standards and Practices for Economic Analysis
- Pilot Competitive Drought Planning and Preparedness Grants, 2024 (December 2023)
- Aquatic Invasive Plant Funding Grant Guidelines (October 2023)
- Clean Diesel Electric School Bus Grant Application Instructions (October 2023)
- Freshwater Algae Grant Funding Guidelines (October 2023)
- Funding Program Guidelines - Local Solid Waste - Financial Assistance - 2023-25 (October 2023)
- Ecology's DERA FY 2023-2024: Fuel Cell Transit Buses and Electric Yard Trucks Grans Announcement and Grant Guidelines (September 2023)
- Equipment Grant Funding Guidelines: 2023 - 2025 (September 2023)
- 2023 Clean Water State Revolving Fund Emergency Funding Program Guidelines (September 2023)
- Washington State Volkswagen Federal Settlement Grant Program: Air Quality VW Electric Vehicle Charging Level 2: Charge Where You Are Grant Announcement and Grant Guidelines (September 2023)
- Water Banking Pilot Grants, 2023-25 Funding Guidelines (August 2023)
- Air Quality VW Diesel to Zero Emission Refuse Vehicle, Street Sweeper, PCHE, and Freight Switcher (AQVWZEV) Grant Application Instructions 2023-25 (August 2023)
- Washington State Volkswagen Federal Settlement Grant Program: Grant Announcement and Grant Guidelines (August 2023)
- Washington Clean Diesel Program Ecology's Zero Emission School Bus Grant Program 2023-25 (August 2023)
- State Fiscal Year 2025 Funding Guidelines Water Quality Combined Funding Program (July 2023)
- Air Quality Local Partner Woodsmoke Reduction Grant Funding Guidelines 2023-25 (June 2023)
- Air Quality Prevent Nonattainment Grants: 2023-2025 Funding Guidelines (June 2023)
- EAGL Application Instructions - Local Solid Waste Financial Assistance Grants - 2023-25 (April 2023)
- EAGL Application Instructions - Public Participation Grants - 2023-25 (April 2023)
- Funding Program Guidelines - Public Participation Grants - 2023-2025 Biennium (April 2023)
- Spills Coastal Protection Fund (CPF) Grant Program – 2023 Funding Guidelines (March 2023)
- Direct Implementation Fund 2023 Funding Guidelines (February 2023)
- Washington State Clean Diesel Program and Volkswagen Settlement Grant Program: Ecology’s Electric Fire Apparatus Grant Program FY 2022-2023 Grants Announcement and Grant Guidelines (November 2022)
- 2022-23 SFY NEP Stormwater Strategic Initiative Funding Guidelines (September 2022)
- 2024 Freshwater Algae Grant Funding Guidelines (September 2022)
- 2024 Aquatic Invasive Plant Grant Funding Guidelines (September 2022)
- State Fiscal Year 2024 Funding Guidelines Water Quality Combined Funding Program (August 2022)
- Washington State Clean Diesel Program: Ecology’s Clean Diesel Grant Program 2022-2023 Grants Announcement and Grant Guidelines (July 2022)
- Remedial Action Grant and Loan Guidance for the 2023–25 Biennium: Oversight Remedial Action Grants and Loans, Area-wide Groundwater Investigation Grants, and Safe Drinking Water Action Grants (Revised June 2022)
- Remedial Action Grant and Loan Guidance for the 2021–23 Biennium: Oversight Remedial Action Grants and Loans, Area-wide Groundwater Investigation Grants, Safe Drinking Water Action Grants (June 2022)
- EAGL Instructions for 2023–25 Remedial Action Grant & Loan Applications: Toxics Cleanup Program’s guidance for using Ecology’s Administration of Grants & Loans System (EAGL) to apply for Oversight Remedial Action Grants & Loans, Area-wide Groundwater Investigation Grants, Safe Drinking Water Action Grants (January 2022)
- Washington State Clean Diesel Program: Ecology’s Electric School Bus Grant Program 2022-2023 (December 2021)
- Rehabilitation of High Hazard Potential Dams Grant Program: Fiscal Year 2021 Funding Program Guidelines (October 2021)
- Water Banking Pilot Grants: 2021-2023 Funding Guidelines (October 2021)
- SFY 2023 Aquatic Invasive Plants Grant Guidlines (October 2021)
- Floodplains by Design Grants Funding Guidelines 2023-25 (October 2021)
- Clean Diesel Program, EPA DERA 2021: Funding Program Guidelines (October 2021)
- 2021-2023 Puget Sound Nutrient Reduction Grant Program Funding Guidelines (September 2021)
- Streamflow Restoration Competitive Grants, 2022: Guidance for project applicants (September 2021)
- State Fiscal Year 2023 Funding Guidelines—Water Quality Combined Funding Program (August 2021)
- 2021-23 Municipal Stormwater Capacity-Building Grant Funding Guidelines (July 2021)
- Funding Guidelines 2021–2023 Biennium: Oil Spill and Hazardous Materials Response and Firefighting Equipment Grants (May 2021)
- Municipal Stormwater Grants of Regional or Statewide Significance 2021-23 Funding Guidance (May 2021)
- Rehabilitation of High Hazard Potential Dams Grant Program Fiscal Year 2020, Funding Program Guidelines (April 2021)
- 2021 Clean Water State Revolving Fund Emergency Funding Program Guidelines (November 2020)
- Water Quality Program Aquatic Invasive Plant Grant Funding Guidelines (September 2020)
- Water Quality Program Freshwater Algae Grant Funding Guidelines (September 2020)
- Water Quality Program State Fiscal Year 2022 Funding Guidelines (August 2020)
- Remedial Action Grants for Local Governments 2018-2021 Guidance (Revised April 2020)
- 2019-2023 NEP Funding Guidelines (March 2020)
- Washington State Volkswagen Settlement: Grants Announcement of Funds Available and Grant Guidelines to Purchase and Install Shore Power for Ocean Going Vessels in Washington, 2020-2023 (March 2020)
- 2020 Clean Water State Revolving Fund Emergency Funding Program Guidelines (January 2020)
- Grants Announcement of Funds Available and Grant Guidelines to Purchase and Install Electric Vehicle Charging Infrastructure along High-Traffic Transportation Corridors in Washington (January 2020)
- Streamflow Restoration Competitive Grants, 2020: Guidance for project applicants (December 2019)
- Washington Volkswagen Settlement: Grants Announcement of Funds Available and Grant Guidelines to Replace Fossil Fuel Powered School Buses with All-Electric School Buses in Washington ( November 2019)
- Floodplains by Design Grant Funding Guidelines 2021-23 (October 2019)
- Funding Guidelines State Fiscal Year 2021 Water Quality Financial Assistance (August 2019)
- Streamflow Restoration Competitive Grants Guidance for Project Applicants - Draft for Public Comment (August 2019)
- 2019-21 Municipal Stormwater Capacity-Building Grants (July 2019)
- Volkswagen Repowering/Replacing Transit Buses with All-Electric Transit Buses (March 2019)
- Washington State Volkswagen Settlement Grants Announcement of Funds Available and Grant Guidelines to Replace/Repower Fossil Fuel Powered Transit Buses with All-Electric Transit Buses (February 2019)
- Funding Guidelines 2020–2021 Biennium: Oil Spill and Hazardous Materials Response and Firefighting Equipment Grants (December 2018)
- Streamflow Restoration Grants State Fiscal Year 2019 Interim Funding Guidelines (June 2018)
- Funding guidelines Floodplains by Design 2019-2021 Biennium (October 2017)
- Administrative Requirements for Recipients of Ecology Grants and Loans (Yellow Book) (August 2017)
- Municipal Stormwater Grants of Regional or Statewide Significance Funding Guidelines (July 2017)
- FY2017-19 Municipal Stormwater Capacity-Building Grants Funding Guidelines (July 2017)
- Funding Guidelines FY 2017-2019 Floodplains by Design (October 2015)
- Administrative Requirements for Recipients of Ecology Grants and Loans Managed in EAGL (March 2014)
- Administrative Requirements for Recipients of Ecology Grants and Loans — "The Yellow Book" (September 2005)
- Toxics Cleanup Program Interim Policy 730: Taking into Account Federal Human Health Surface Water Quality Criteria under MTCA ( Jan. 2021)
- Toxics Cleanup Program Policy 120A: Independent Remedial Actions (Dec. 2016)
- Toxics Cleanup Program Policy 130A: Coordination of MTCA and SEPA (Revised July 2004)
- Toxics Cleanup Program Policy 300: Site Discovery – Reporting Releases (Revised June 2004)
- Toxics Cleanup Program Policy 310A: Initial Investigations (Revised Dec. 2009)
- Toxics Cleanup Program Policy 310B: Creating or Changing the Name, Address, or Identification Number for a Facility or Site (Revised Oct. 2011)
- Toxics Cleanup Program Policy 330A: Listing of Sites on the Hazardous Sites List (Revised Oct. 2004)
- Toxics Cleanup Program Policy 330B: Removal of Sites from the Hazardous Sites List (Revised Oct. 2004)
- Toxics Cleanup Program Policy 340B: Managing TCP's Program Plan (Oct. 2008)
- Toxics Cleanup Program Policy 500A: Identification of Potentially Liable Persons (Revised May 2016)
- Toxics Cleanup Program Policy 520A: Consent Decrees (Revised April 2018)
- Toxics Cleanup Program Policy 520B: Interim Policy – Prospective Purchaser Agreements (Aug. 1994)
- Toxics Cleanup Program Policy 520C: De Minimis Consent Decrees (Revised Dec. 2016)
- Toxics Cleanup Program Policy 530A: Agreed Orders (Revised April 2018)
- Toxics Cleanup Program Policy 540A: Enforcement Orders (Revised April 2018)
- Toxics Cleanup Program Policy 550A: Cost Recovery (Revised Dec. 2017)
- Toxics Cleanup Program Policy 550C: Prepaid Cleanup Oversight (June 2006)
- Toxics Cleanup Program Policy 560B: Granting Mixed Funding for LUST Cleanups (Oct. 2017)
- Toxics Cleanup Program Policy 600A: Site Register Publication (Revised April 2008)
- Toxics Cleanup Program Policy 710A: Permit Exemptions for Remedial Actions under MTCA (Revised Nov. 2015)
- Toxics Cleanup Program Policy 800A: Property Access (Feb. 1991)
- Toxics Cleanup Program Policy 800B: Information Access (Feb. 1991)
- Toxics Cleanup Program Policy 840: Data Submittal Requirements (Revised April 2016)
- Toxics Cleanup Program Procedure 320: Site Hazard Assessment and Ranking of MTCA Sites by Ecology Staff (Revised June 2004)
- Toxics Cleanup Program Procedure 321: Site Hazard Assessment of MTCA Sites by Local Health Districts/Departments (Revised June 2004)
- Toxics Cleanup Program Procedure 440A: Establishing Environmental Covenants under the Model Toxics Control Act (Revised Dec. 2016)
- Toxics Cleanup Program Procedure 440C: Releasing Environmental Covenants under the Model Toxics Control Act (Revised Dec. 2016)
- Toxics Cleanup Program Procedure 500A: Identification of Potentially Liable Persons (Revised May 2016)
- Toxics Cleanup Program Procedure 550A: Cost Recovery under a MTCA Order or Decree (Revised Feb. 2015)
- Toxics Cleanup Program Procedure 550B: Property Liens under RCW 70.105D.055 (July 2012)
- Toxics Cleanup Program Implementation Memo No. 2: Applicability of WAC 173-340-706 (Revised Sept. 2018)
- Implementation Memorandum #4: Determining Compliance with Method A Cleanup Levels for Diesel and Heavy Oil (June 2004)
- Implementation Memorandum #5: Collecting and Preparing Soil Samples for VOC Analysis (June 2004)
- Nematode Bioassay Protocol for Soil Toxicity Screening (Aug. 2004)
- Implementation Memorandum #7: Soil Moisture Corrected Reporting by EPA Method 8000C (Feb. 2008)
- Technical Memorandum #8: Natural Background for Dioxins/Furans in WA Soils (Aug. 2010)
- Technical Memorandum #9: Building Code Compliance for Factory Built Commercial Structures (May 2011)
- Implementation Memorandum #10: Evaluating the Human Health Toxicity of Carcinogenic PAHs (cPAHs) using Toxicity Equivalency Factors (TEFs) (April 2015)
- Implementation Memorandum #11: Dioxins, Furans, and Dioxin-Like PCB Congeners: Addressing Non-Detects and Establishing PQLs for Ecological Risk Assessments in Upland Soil (July 2015)
- Implementation Memorandum #12: When to Use EPA Method 1668 for PCB Congener Analyses (July 2015)
- Implementation Memorandum No. 13: Dioxins, Furans, and Dioxin-Like PCB Congeners: Ecological Risk Calculation Methodology for Upland Soil (July 2016)
- Implementation Memorandum No. 14: Updated Process for Initially Assessing the Potential for Petroleum Vapor Intrusion (March 2016)
- Implementation Memorandum No. 15: Frequently Asked Questions (FAQs)Regarding Empirical Demonstrations and Related Issues (June 2016)
- Implementation Memorandum No. 16: Developing Conditional Points of Compliance at MTCA Sites Where Groundwater Discharges to Surface Water (Revised Dec. 2017)
- Implementation Memorandum No. 18: Petroleum Vapor Intrusion (VI): Updated Screening Levels, Cleanup Levels,and Assessing PVI Threats to Future Buildings (Revised Jan. 2018)
- Implementation Memorandum No. 19: Gasoline and DieselSoil Concentrations Predicted to be Protective of UplandEcological Receptors (Aug. 2017)
- Implementation Memorandum No. 20: Frequently Asked Questions (FAQs) Regarding Model Remedy Implementation (March 2017)
- Implementation Memorandum No. 21: Frequently Asked Questions (FAQs) Regarding Vapor Intrusion (VI) andEcology's 2009 Draft VI Guidance (Revised Nov. 2018)
- Implementation Memorandum No. 22: Vapor Intrusion (VI) Investigations and Short-Term Trichloroethene (TCE)Toxicity (Revised Oct. 2019)
- Interprogram Policy: Area of Contamination
- Focus on Model Toxic Control Act Cleanup Regulation:Process for Cleanup of Hazardous Waste Sites (Revised Nov. 2007)
- Focus on: Washington’s Environmental Cleanup Law (Revised Nov. 2018)
- Focus on Site Register (Revised Sept. 2009)
- Private Right of Action (Revised Dec. 2002)
- Remedial Investigation Checklist (May 2016)
- Feasibility Study Checklist (May 2016)
- Cleanup Action Plan Checklist (May 2016)
- Adaptation Strategies for Resilient Cleanup Remedies: A Guide for Cleanup Project Managers to Increase the Resilience of Toxic Cleanup Sites to the Impacts from Climate Change (Nov. 2017)
- Focus on Hazardous Sites List (Revised Aug. 2009)
- Focus on Washington Ranking Method (Revised Aug. 2009)
- Focus on Site Hazard Assessment (Revised Aug. 2009)
- Washington Ranking Method Scoring Manual (Revised April 1992)
- Site Hazard Assessment Guidance and Procedures for Washington Ranking Method (Revised April 1992)
- Toxicology Database for Use in Washington Ranking Method Scoring (Revised Nov. 2008)
- Focus on Developing Soil Cleanup Standards under the Model Toxics Control Act (Revised April 2005)
- Focus on Developing Ground Water Cleanup Standards under the Model Toxics Control Act (Revised April 2005)
- Focus on Developing Surface Water Cleanup Standards under the Model Toxics Control Act (Revised April 2005)
- Cleanup Levels and Risk Calculations (CLARC) under theModel Toxics Control Act
- Workbook Tools for Calculating Soil and Ground Water Cleanup Levels Under the Model Toxics Control Act Cleanup Regulation: Users Guide for MTCATPH 11.1 and MTCASGL 11.0 (Revised Dec. 2007)
- MTCASGL 11.0: Workbook for Calculating Cleanup Levels for Individual Hazardous Substances
- MTCATPH 11.1: Workbook for Calculating Cleanup Levels for Petroleum Contaminated Sites
- Statistical Guidance for Ecology Site Managers (Revised Aug. 1993)
- Guidance on Sampling and Data Analysis Methods (Revised Jan. 1995)
- MTCAStat 97: Site Module
- MTCAStat 97: Background Module
- Natural Background Soil Metals Concentrations in Washington State (Oct. 1994)
- Draft Technical Document: Terrestrial Ecological Evaluations under the Model Toxics Control Act (Feb. 2019)
- Draft Guidance for Evaluating Soil Vapor Intrusion in Washington State: Investigation and Remedial Action (April 2018)
- Guidance for Remediation of Petroleum Contaminated Sites (Revised June 2016)
- Analytical Methods for Petroleum Hydrocarbons (Revised June 2013)
- Model Remedies for Sites with Petroleum Contaminated Soils (Revised Dec. 2017)
- Model Remedies for Sites with Petroleum Impacts to Groundwater (Revised Dec. 2017)
- Guidance on Remediation of Petroleum-Contaminated Ground Water by Natural Attenuation (July 2005)
- User’s Manual: Natural Attenuation Analysis Tool Package for Petroleum-Contaminated Ground Water (July 2005)
- Natural Attenuation Analysis Tool for Petroleum-Contaminated Ground Water –Package A: Workboo kwithout Groundwater Flow Model
- Natural Attenuation Analysis Tool for Petroleum-Contaminated Ground Water –Package B: Workbook with Groundwater Flow Model
- Sediment Cleanup User's Manual II (SCUM II) (Revised Dec. 2019)
- Wood Waste Cleanup: Identifying, Assessing, and Remediating Wood Waste in Marine and Freshwater Environments (Sept. 2013)
- Bellingham Bay Regional Background Sediment Characterization: Final Data Evaluation and Summary Report (Feb. 2015)
- Port Gardner Bay Regional Background Sediment Characterization: Final Data Evaluation and Summary Report (Dec. 2014)
- Lake Washington Area Regional Background: Data Evaluation and Summary Report (Feb. 2017)
- North Olympic Peninsula Regional Background Sedimen tCharacterization: Data and Evaluation Report (Feb. 2016)
- South Puget Sound Regional Background: Final Data Evaluation and Summary Report (May 2018)
- Agency Determination Checklist (Dec. 2017)
- Guidelines for Property Cleanups under the Voluntary Cleanup Program (Revised July 2015)
- Voluntary Cleanup Program (VCP): Guidance for the Expedited VCP Process (July 2020)
- Toxics Cleanup Program Policy 900: Underground StorageTank (UST) Enforcement (Sept. 1992)
- Toxics Cleanup Program Policy 920: Providing Public Participation in Underground Storage Tank (UST) Settlements (Sept. 1992)
- Toxics Cleanup Program Policy 930: Investigation of and Responses to Complaints of Underground Storage Tank (UST) Violations (Sept. 1992)
- Focus on Check Your Farm Tank … It May be Regulated (Revised Nov. 2004)
- Focus on Waste Oil Tanks (Revised Sept. 2003)
- Focus on Spent Antifreeze USTs (Dec. 2015)
- UST Tank Fee Increase in 2018 (March 2017)
- Focus on UST Fee Increase in 2020 (Feb. 2019)
- Focus on Preparing for an UST Inspection English (Revised Oct. 2018) Korean (Revised Sept. 2013)
- Focus on UST Technical Assistance Program (Revised Jan 2012)
- Focus on Delivery Prohibition or “Red Tagging” (Revised Nov. 2012)
- Focus on the New UST Secondary Containment Requirement (Aug. 2012)
- Frequently Asked Questions about Biodiesel in Underground Storage Tanks (Oct. 2003)
- Focus on UST Operator Training English (Revised July 2013); Korean (Revised April 2012)
- Focus on Emergency Signage Required for UST Sites (Revised June 2013)
- Focus on Automatic Tank Gauges for Underground StorageTanks (March 2005)
- Focus on UST Spills or Releases (Revised May 2016)
- Guidance for Site Checks and Site Assessments for Underground Storage Tanks (Revised April 2003)
- What to do if You Find a Leak or Spill from Your Underground Storage Tank (Nov. 2007)
- Focus on: Temporary Closure of USTs (Oct. 2018)
- Permanent Closure of USTs
- Frequently Asked Questions about Financial Responsibility for Underground Storage Tanks (Revised Sept. 2015)
Title and description
- Interpretive Statement on Subdivision SEPA Exemptions (2023)
- Shoreline Master Program Periodic Reviews (2023)
- Shoreline Master Program Periodic Review deadlines (Aug. 2019)
- Shoreline Master Programs Handbook (Revised Dec. 2017)
- Reimbursement of permit decision legal expenses under RCW 43.21A.690 and 90.03.265 (Dec. 2000)
- Ground Water Monitoring Guidance for Solid Waste Facilities (July 1987)
- Guidelines for Reporting Imported Solid Waste (Jan. 1994)
- Moderate Risk Waste Fixed Facility Guidelines (Dec. 1995)
- Frequently Asked Questions about Moderate-Risk WasteCollection Facilities; Implementation of Chapter 173-350-360 WAC (Nov. 2003)
- On-Farm Composting of Livestock Mortalities (July 2005)
- Environmentally Sound Management and Performance Standards for Direct Processors (Nov. 2007)
- Guidelines for Developing and Updating Local Hazardous Waste Plans (Feb. 2010)
- Guidelines for Development of Local Comprehensive Solid Waste Management Plans and Plan Revisions (Feb. 2010)
- Acceptable Uses for Recycled Asphalt Roofing in Washington State (Revised Jan. 2011)
- Frequently Asked Questions about Assessment Monitoring for Chapter 173-351 WAC Landfills (Revised March 2012)
- Odor Prevention, Management/Mitigation Plan Requirements (Aug. 2013)
- Preparing for Termination of Post-Closure Activities at Landfills Closed Under Chapter 173-304 WAC (Revised April 2014)
- Guidelines for Operating an Anaerobic Digester Exempted From Solid Waste Handling Permit (Revised Feb. 2014)
- Guidance for Monitoring at Landfills and Other Facilities Regulated Under Chapters 173-304, 173-306, 173-350, and 173-351 WAC (Revised Dec. 2018)
- Manufacturer Plan Guidance for the Photovoltaic Module Stewardship Program (July 2019)
- Managing Nitrogen from Biosolids (June 1999)
- Biosolids Management Guidelines for Washington State (Revised July 2000)
- Organics Job Alike Group Decision Record: Septic Tank Effluent Pump (STEP) Systems
- Organics Job Alike Group Decision Record: Peshastin-do they need to submit and annual report?
- Organics Job Alike Group Decision Record: What Constitutes Storage Versus Disposal?
- Organics Job Alike Group Decision Record: Agronomic Rates on Rangeland
- Biosolids Job Alike Group Decision Record: Regulation of Compost Containing Biosolids.
- Biosolids Job Alike Group Decision Record: Permitting Compost Operations in Washington
- Biosolids Job Alike Group Decision Record: Large Onsite Septic Systems and Applicability to WAC 173-308
- Organics Job Alike Group Decision Record: Achieving Class B for Pathogens Status via the Seven Samples Alternative
- Organics Job Alike Group Decision Record: Adding Persons to a Biosolids Interested Parties List and Notifying Persons on the List
- Organics Job Alike Group Decision Record: Out of State Biosolids-Should they be held to the same beneficial use standards?
- Organics Job Alike Group Decision Record: Biosolids Beneficial Use Facilities Proposing Sites in Different Regions
- Organics Job Alike Group Decision Record: Policy on One Biosolids Permit Per Land Application Site
- Organics Job Alike Group Decision Record: Soil Sampling at Septage Sites
- Organics Job Alike Group Decision Record: Using WAC 173-308-310(22) to Approve Transfers of Biosolids on Land
- Organics Job Alike Group Decision Record: Policy on Mixing Exceptional Quality Biosolids
- Organics Job Alike Group Decision Record: Application of Biosolids/Septage to Frozen or Snow Covered Ground
- Waste 2 Resources Program Facilities Implementation Team **Discussion Thread/Decision Record**: Biodiesel Filtercake as an Acceptable Feedstock for Permit Exempted Anaerobic Digesters.
- Waste 2 Resources Program Facilities Implementation Team (FIT)**Discussion Record**: Are anaerobic digesters subject to permitting, design and operating standards as a tank or surface impoundment under WAC 173-350-330 or are they conditionally exempt as recyclers under WAC 173- 350-210?
- Waste 2 Resources Program Facilities Implementation Team (FIT) **Discussion Thread**: Are facilities handling liquids squeezed from food waste, but not otherwise handling the food waste, subject to WAC 173-350?
- Equipment Grant Funding Guidelines (2023-25)
- Spills Coastal Protection Fund (CPF) Grant Program - 2023 Funding Guidelines
- Chapter 173-180 WAC Implemenation Guidance for Class 1 Facilities
- Ecology Spill Drill Evaluation Checklist
- Ecology Self Certified Spill Drill and Exercise Evaluation Checklist
- Ecology Out of State Credit Spill Drill and Exercise Evaluation Checklist
- Spills Program CORE Procedure - CORE 10E: Covered Vessel Incidents and Managing Captain of the Port Orders
- Guidance on covered vessels/facilities needing contingency plans
- Focus on Pre-Booming Requirements, Alternative Measures and Equivalent Compliance for Vessels Delivering Oil
- Focus on Pre-Booming Requirements, Alternatives Measures and Equivalent Compliance for Oil Handling Facilities
- Fishing Vessel Boarding Checklist
- Washington State Accepted Industry Standards for Cargo & Passenger Vessels
- Cargo and Passenger Vessel Boarding Checklist - Full Version
- Cargo and Passenger Vessel Boarding Checklist - Short Form
- Washington State Accepted Industry Standards for Fishing Vessels
- Spills Program Prevention/Policy Procedure - PREV 1: Inspections
- Development of the WA State Oil Spill Compensation Schedule
- Guidelines for Determining Oil Spill Volume in the Field - Terminology, Ranges, Estimates and Experts
- Spills Program Cost Recovery - General Guidelines and Criteria
- RDA/CPF Executive Director Desk Manual
- Credit for Oil Recovery - Washington Oil Spill Compensation Schedule
- 2017 - 2019 Biennium Final Equipment Cache Funding Offer List
- State Fiscal Year 2017 Final Equipment Cache Funding Offer List
- Options for Responding to an Order for Reimbursement of Expenses (ORE)
- Spills Program CORE Procedure - CORE 12: Enforcement
- Revised Accepted Industry Standards, 1998-1999 C&P Vessel Inspection Advisory Committee
- Notice of Adoption, 1998-1999 Accepted Industry Standards for Cargo and Passenger Vessel Inspections (AIS)
- Dispute Resolution Related to Total Maximum Daily Loads (TMDLs) or Water Cleanup Plans – Water Quality Program Policy 1-25
- Stormwater Management Manual for Eastern Washington (Revised Aug. 2019)
- Criteria for Sewage Works Design (Orange Book) (Revised Feb. 2019)
- Reclaimed Water Facilities Manual: The Purple Book (Revised Feb. 2019)
- Water Quality Policy 1-11 Chapter 1: Washington's Water Quality Assessment Listing Methodology to Meet Clean Water Act Requirements (Revised Nov. 15, 2018)
- Washington State’s Marine Dissolved Oxygen Criteria: Application to Nutrients – Understanding the Purpose and Application of the Criteria in the Surface Water Quality Standards (Revised Aug. 2018)
- Water Quality Permit Writer’s Manual (Revised July 2018)
- Whole Effluent Toxicity Testing Guidance and Test Review Criteria (Revised June 2016)
- Application of Water Quality Criteria in Brackish Waters (June 2015)
- Washington's Water Quality Management Plan to Control Nonpoint Sources of Pollution (Revised July 2015)
- Stormwater Management Manual for Western Washington, as amended in December 2014 (The 2014 SWMMWW) (Dec. 2014)
- Vehicle and Equipment Washwater Discharges/Best Management Practices Manual (Revised Nov. 2012)
- Water Quality Program Guidance Manual: Supplemental Guidance on Implementing Tier II Antidegradation (Sept. 2011)
- Water Quality Program Guidance Manual: Procedures to Implement the State’s Temperature Standards through NPDES Permits (Revised Oct. 2010)
- Water Quality Program Policy 1-11, Chapter 2: Ensuring Credible Data for Water Qualit Management (Revised July 2021)
- Implementation Guidance for Ground Water Quality Standards (Revised Oct. 2005)
- Water Quality Certifications for Existing Hydropower Dams: Guidance Manual (Revised April 2005)
- State Requirements for Submission of Engineering Reports and Plans for Industrial Wastewater Treatment Facilities (Jan. 2005)
- Guidance on Land Treatment of Nutrients in Wastewater, with Emphasis on Nitrogen (Nov. 2004)
- Information Manual for Treatment Plant Operators (Feb. 2004)
- Guidelines for the Preparation of Engineering Reports for Industrial Wastewater Land Application Systems (May 1993)
- Municipal Water Law Policy and Interpretive Statement (POL-2030) (Nov. 2024)
- Administration of the Statewide Trust Water Rights Program Policy and Interpretive Statement (POL-1010) (Nov. 2024)
- Water Resources Program Policy: Defining and Delineation of Water Sources – Policy 2010 (Feb. 2007)
- Water Resources Program Policy: Policy for the Diversion or Withdrawal of Saltwater – Policy 1015 (Dec. 1994)
- Water Resources Program Policy: Policy for Conveying Stockwater Away from Streams To Protect Water Quality– Policy 1025 (Dec. 1994)
- Water Resources Program Policy: Permits for Short-Term Water Use – Policy 1037 (Sept. 1992)
- Water Resources Program Policy: Emergency Water Source Authorization – Policy 1045 (Sept. 2006)
- Water Resources Program Policy: Water Right Permits for Fire Fighting or Protection – Policy 2015 (March 2008)
- Water Right Procedure: Procedure for Notification of Water Right Actions to the Department of Revenue – Procedure 1130 (Oct. 2004)
- Water Resources Program Policy and Interpretive Statement: The Relinquishment, Rescission, and Abandonment of Water Rights – Policy 1060 (Dec. 2019)
- Interim Guidance for Determining Net Ecological Benefit for streamflow restoration planning and mitigation pilots (June 2018)
- ESSB 6091 Recommendations for Water Use Estimates (Revised June 2018)
- ESSB 6091 Initial Policy Interpretations (March 2018)
Administration of water rights
- Policy 1000 - Water Rights Processing Policy (March 2015)
- Procedure 1000 - Water Rights Processing Procedures (Revised March 2015)
- Policy 1017 - Policy Regarding Collection of Rainwater for Beneficial Use (Oct. 2009)
- Policy 2025 - Policy/Interpretive Statement on When to Perform a Maximum Net Benefits Analysis (Jan. 2005)
- POL 2050 - Policy and Interpretive Statement on Reservations of Water for Future Uses of the John Day-McNary Pools Reach of The Columbia River (Aug. 2019)
- POL 2094 - Streamflow Restoration Policy and Interpretive Statement (July 2019)
- Final Guidance for Determining Net Ecological Benefit (July 2019)
Water right changes or transfers
- Policy 1200 - Evaluation of Changes or Transfers to Water Rights (Revised Nov. 2014)
- Policy 1210 - Policy for the Evaluation of Changes to Enable Irrigation of Additional Acreage or the Additon of New Purposes of Use to Existing Water Rights (Revised April 2018)
- Policy 1280 - Development Schedules for Water Right Changes and Transfers (April 2015)
- 2003 Municipal Water Law Interpretive and Policy Statement (May 2012)
Water use associated with heat pumps
- Policy 2020 - Priority Processing of Heat Pump Applications (April 20, 2018)
Related links
Contact information
Public Records Officer
PublicRecordsOfficer@ecy.wa.gov
360-407-6040