Research & Data

Use this portal to filter and search for all of our scientific information.

Ecology provides the high-quality science that is the foundation of Washington state environmental policy. Our monitoring, assessment, and modeling services provide a data-rich understanding of our state’s land, air, and water. We provide access to that data through reports, databases, maps and user-friendly online tools.

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UST-closure-packet

Instructions for closing an Underground Storage Tank

https://ecology.wa.gov/ust-closure-packet

UST COVID-19 Stakeholder letter, March 27, 2020

This letter is to inform you of the Government Public Health and Safety Restrictions in regards to implementation of the Underground Storage Tank requirements (UST) imposed by coronavirus (COVID-19).

https://ecology.wa.gov/ust-covid-19-stakeholder-letter-march-27-2020

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

Vapor Intrusion for TCE

EPA's Region 9 memo Vapor Intrusion response action levels

https://ecology.wa.gov/vi-tce-region-9-memo

UST Service Provider list

List of approved underground storage tank service providers with contact and service-area information

https://ecology.wa.gov/ustserviceproviders

Vapor Intrusion guidance for TCE

EPA's Region 10 memo Vapor Intrusion toxicity

https://ecology.wa.gov/vi-tce-region-10-memo

Electronically completing and signing VCP documents

How to complete and sign VCP documents electronically. These are temporary instructions to be used during the Governor's Stay Home - Stay Healthy proclamation period.

https://ecology.wa.gov/vcp-electronic-signatures

Voluntary Cleanup Program cleanup opinions flow chart description

This document describes the flow chart on our Voluntary Cleanup Program types of opinions we issue page.

https://ecology.wa.gov/vcpopinionsflowchartalttext

Cleanup Rule exploratory rulemaking process & timeline (as of January 2018)

A January 2018 notice of our exploratory process and timeline for updating Washington's Cleanup Rule.

https://ecology.wa.gov/noticecleanupruleexprmjan2018

Notice to withdraw from the Voluntary Cleanup Program

This document is a form letter to complete and submit when withdrawing from the Voluntary Cleanup Program.

https://ecology.wa.gov/vcp-withdrawalnotice

PSI Cleanup Sites - Port Gardner, Sound Living Conference presentation (October 25, 2014)

Presentation about the Port Gardner cleanup and The Puget Sound Initiative, from the Sound Living conference (Oct. 25, 2014)

https://ecology.wa.gov/psi-cleanup-sites-port-gardner-sound-living-con

Slide desk for statewide scoping webinar on April 3, 2018

Slides for the Cleanup Rule's statewide scoping session on Tuesday, April 3, 2018.

https://ecology.wa.gov/scopingsessionslidedeck04-03-2018

Technical Assistance Agreement Sites

An accessible list of gas station site participating in Technical Assistance Agreements with Ecology

https://ecology.wa.gov/taagsitesaccessible

Tacoma Smelter Plume - Soil Replacement Sequence

Text document describing the sequence of soil replacement work.

https://ecology.wa.gov/tsp-soil-replacement-accessible

Draft UST Service Provider list

This is a draft list of certified underground service tanks service providers.

https://ecology.wa.gov/ust-service-provider-list-10-01-17

Package A-Natural Attenuation Tool

Package A-Natural Attenuation Tool Package (Modules 1.2 and 3)

https://ecology.wa.gov/package-a

Summary of Ecology Listening Session December 2018. Feedback on Draft Implementation Memo No. 22: Vapor Intrusion (VI) Investigations and Short-term Trichloroethene (TCE) Toxicity

This summary of the December 2018 Ecology Listening Session provides feedback on participant questions regarding Draft Implementation Memo No. 22.

https://ecology.wa.gov/summary-of-ecology-listening-session-december-2018

MTCASGL12.0: Excel workbook for individual hazardous substances

Statistical workbook for calculating cleanup levels for individual hazardous substances for sites being cleaned up under the Model Toxics Control Act.

https://ecology.wa.gov/workbook-for-calculating-cleanup-levels-for-indivi

Northeast West Plains PFAS in drinking water sampling area map

West Plains Sampling Map

https://ecology.wa.gov/west-plains-pfas-sampling-area-map

Swift Creek Construction Diagram July 2024

This diagram shows the engineered controls and construction schedule for the Swift Creek Project.

https://ecology.wa.gov/swift-creek-construction-diagram-2024