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Environmental Assessment (3574 publications 1957-2024)

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Title (link to summary)NumberDate (released or updated)
Addendum 3 to Quality Assurance Monitoring Plan: Long-Term Marine Waters Monitoring, Water Column Program 23-03-118December 2023
Better Brakes Enforcement Study, 2022 23-03-028December 2023
Quality Assurance Project Plan: Monitoring of Tire Contaminants in Coho Salmon Watersheds 23-03-113November 2023
Prevalence and Persistence of Cyanotoxins in Lakes of the Puget Sound Basin: Cyanotoxin production in Spanaway Lake (Pierce County, Washington) during the summer of 2021 23-03-027November 2023
School Supplies 2023: Addendum 1 to Quality Assurance Project Plan: Lead and Cadmium in School Supplies, 2021 23-03-117September 2023
Quality Assurance Project Plan: Per- and Polyfluoroalkyl Substances in Freshwater Fish of Ten Lakes, 2023 23-03-116September 2023
Final Regulatory Analyses for Chapter 173-50 WAC, Accreditation of Environmental Labs 23-03-026September 2023
Rule Implementation Plan Chapter 173-50 WAC, Accreditation of Environmental Laboratories 23-03-025September 2023
Concise Explanatory Statement for Chapter 173-50 WAC, Accreditation of Environmental Laboratories 23-03-024September 2023
Puget Sound Dissolved Oxygen Model Nutrient Load Summary for 1999-2008 11-03-057September 2023
South Puget Sound Dissolved Oxygen Study: Interim Nutrient Load Summary for 2006-2007 11-03-001September 2023
Quality Assurance Project Plan: Soos Creek Temperature, Dissolved Oxygen, and Bacteria TMDL Study 23-03-105August 2023
Addendum: Puget Sound Nutrient Monitoring Project to Quality Assurance Monitoring Plan: Statewide River and Stream Ambient Water Quality Monitoring 23-03-102August 2023
Standard Operating Procedure EAP099, Version 1.2: Collecting Groundwater Samples: Purging and Sampling Monitoring Wells for General Chemistry Parameters 23-03-209July 2023
Standard Operating Procedure EAP038, Version 1.4, Collection of Freshwater Sediment Core Samples Using a Box or KB Corer 23-03-208July 2023
Assessment of Toxic Chemicals in Children’s Products, 2019 23-03-016July 2023
Flame Retardants in Electric and Electronic Casings, 2021 23-03-015July 2023
Methylmercury in Freshwater Fish, 2020 Comparison Study 23-03-011July 2023
Standard Operating Procedures EAP025, Version 2.4, Seawater Sampling 23-03-207June 2023
Standard Operating Procedure EAP052, Version 1.4, Manual Well-Depth and Depth-to-Water Measurements 23-03-204June 2023
Quality Assurance Project Plan: Hylebos Waterway Crab Tissue Study, Occidental Chemical Corporation 23-03-115June 2023
Quality Assurance Project Plan: Monitoring Persistent, Bioaccumulative, and Toxic Chemicals (PBTs) Using Age-Dated Lake Sediment Cores: 2023-2027 23-03-114June 2023
Quality Assurance Project Plan: Aquatic Plant Monitoring in Washington State Lakes, Rivers, and Streams 23-03-112June 2023
Laboratory Accreditation: Prepare for the Next Renewal 23-03-019June 2023
Measuring Mercury Trends in Freshwater Fish in Washington State: 2017-2019 Sampling Results 23-03-014June 2023
Okanogan River Watershed: Freshwater Fish Contaminant Monitoring Program, 2017 Results 23-03-013June 2023
Black Lake Grocery Groundwater Monitoring Results, October 2021: Data Summary Report 23-03-023May 2023
Shelton Laundry and Cleaners Groundwater Monitoring Results, October 2021: Data Summary Report 23-03-022May 2023
Focus on: Soos Creek Temperature, Dissolved Oxygen, and Bacteria Study 23-03-018May 2023
Yakima Railroad Area PCE Contamination: Groundwater Quality Monitoring, 2021 23-03-012May 2023
Standard Operating Procedure EAP070, Version 2.3, Minimize the Spread of Invasive Species 23-03-225April 2023
Standard Operating Procedure EAP039, Version 1.4, Obtaining Marine Sediment Samples 23-03-205April 2023
Quality Assurance Monitoring Plan: Statewide River and Stream Ambient Water Quality Monitoring, 2023 revision 23-03-106April 2023
Eyes Over Puget Sound: Decade in Review — 2023 23-03-070April 2023
Focus on: Monitoring 6PPD-q in the environment 23-03-017April 2023
Preliminary Regulatory Analyses for Chapter 173-50 WAC, Accreditation of Environmental Labs 23-03-010April 2023
Addendum to Quality Assurance Project Plan: Assessing Sources of Toxic Chemicals Impacting Juvenile Chinook Salmon 23-03-111March 2023
Addendum 3 to Quality Assurance Project Plan: Freshwater Fish Contaminant Monitoring Program 2023, Spokane River 23-03-110March 2023
Quality Assurance Monitoring Plan: The 2023-2028 Puget Sound Sediment Monitoring Program 23-03-104March 2023
Results of Validation Exercise for Marine Benthic Index 23-03-009March 2023
PCBs in State Purchased Products – Vehicle and Ferry Lubricants 2017 23-03-006March 2023
Standard Operating Procedure EAP009, Version 1.3, Field Collection, Processing, and Preservation of Finfish Samples at the Time of Collection in the Field 23-03-202February 2023
Standard Operating Procedure PTP005, Version 1.1, Thermo Scientific Nicolet iS5 FTIR Spectrometer 23-03-201February 2023
Addendum 2 to Quality Assurance Monitoring Plan: Long-Term Marine Waters Monitoring, Water Column Program 23-03-109February 2023
Addendum to Quality Assurance Monitoring Plan: Statewide River and Stream Ambient Water Quality Monitoring, Selected Toxics in the Upper Green River Watershed 23-03-101February 2023
Focus on: Watershed Health Monitoring 2023 23-03-008February 2023
PFAS in Washington State Products, 2018 23-03-007February 2023
Standard Operating Procedure EAP088, Version 1.1 Marine Waters Data Quality Assurance and Quality Control 23-03-233January 2023
Standard Operating Procedure EAP043, Version 1.4 Marine Macrobenthic Sample Analysis 23-03-232January 2023
Writing Standard Operating Procedures, A Guide for Small Waste Water Treatment Plant Operators 23-03-203January 2023
Addendum to Quality Assurance Project Plan: Toxic Chemicals in Cosmetics: Phthalates and Asbestos 23-03-108January 2023
Quality Assurance Project Plan: Flame Retardants in Fabrics of Children’s Play Tents and Other Products 23-03-107January 2023
Quality Assurance Project Plan: White Salmon Watershed Bacteria Assessment 23-03-103January 2023
Cadmium and Other Metals in Children’s Jewelry 2018, Follow-up Study 23-03-004January 2023
PCBs in State Purchased Products, Fabrics 2017 23-03-001January 2023