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.
TPA PI Calendar 2017-2018
TRI-PARTY AGREEMENT AGENCIES - PUBLIC INVOLVEMENT CALENDAR – Fall/Winter 2017-2018
https://ecology.wa.gov/tpa-pi-calendar-2017-2018
TMDL Surrogates White Paper
This is a white paper that discusses the use of surrogates in Total Maximum Daily Load (TMDL) water cleanup plans.
https://ecology.wa.gov/tmdl-surrogates-white-paper
Fire Mountain Farms topographical map
Topographical map for Fire Mountain Farms' proposed biosolids land application site
https://ecology.wa.gov/topographical-map
Total suspended solids benchsheet
is a quality-control tool for environmental laboratories.
https://ecology.wa.gov/total-suspended-solids-benchsheet
TMDL Prioritizaiton Issue Paper for WQ Assessment Policy 1-11
Policy 1-11 Public Dialogue TMDL Prioritization Issues Paper
https://ecology.wa.gov/tmdlprioritizaitonissuepaperpolicy1-11
TotalCompostedProduced-AltChart
This spreadsheet contains data on the amount of material composted in Washington, as well as the amount of compost produced in the state.
https://ecology.wa.gov/totalcompostedproduced-altchart
Transmittal Letter
Letter transmitting Ecology's proposed permit modification for the WTP Analytical Laboratory operations.
https://ecology.wa.gov/transmittal-letter
Transmittal Letter
Start of Public Comment Period for the Draft Hanford Site Air Operating Permit (AOP) Renewal 3
https://ecology.wa.gov/transmittal-letter-d05b7b46ed7eb953d4597627837c8259
ToriShell Equivalent letter
Ecology finds ToriShell functionally equivalent to C126 Polyacrylamide for soil erosion and dust control.
https://ecology.wa.gov/tortishell
Track Clean™ Construction Entrance Plates Functional Equivalency
Ecology finds Track Clean™ Construction Entrance Plates can be used as a temporary erosion control mechanism. These plates must adhere to the guidelines of Best Management Practice C105 (Stabilized Construction Entrance) for stormwater control.
https://ecology.wa.gov/trackclean
T-Plant Settlement Agreement
Settlement between Ecology and CHPRC regarding T-Plant penalty
https://ecology.wa.gov/t-plant-settlement-agreement
Total Reclaim Audit Report
This document includes information about direct processor, Total Reclaim, and includes their annual environmental audit report. This audit verifies compliance with the performance standards for direct processors in the E-Cycle WA program.
https://ecology.wa.gov/totalreclaim2017
Toxic Substances in Industry Reduction Data
Excel file showing amounts of toxic substances used by Washington industries, 2007 - 2012.
https://ecology.wa.gov/toxicsubsreddata
Track change preliminary draft of the Sand and Gravel General Permit.
Edits to the preliminary draft of the Sand and Gravel General Permit.
https://ecology.wa.gov/track-changes-preliminary-draf
Toppenish Approved SMP - Yakima County Regional SMP January 2010
Shoreline Master Program that has been adopted by the local jurisdiction and Approved by Ecology
https://ecology.wa.gov/toppenish-approved-smp-yakima-county-regional-sm
Preliminary Draft with track changes for 2016 Sand & Gravel General Permit
Sand & Gravel General Permit Preliminary draft with track changes
https://ecology.wa.gov/trackchangepreliminarydraft
TrackingBoardCommissionersAndBoardEligibility
Water Conservancy Boards - TRACKING OF BOARD COMMISSIONERS AND BOARD ELIGIBILITY
https://ecology.wa.gov/tracking-of-board-commissioners-and-board-eligibility
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