Tag: PFAS
Guidance for Investigating and Remediating PFAS Contamination in Washington State
Department of Ecology
June, 2023
A brief history of PFAS
Per- and polyfluoroalkyl substances are collectively known as PFAS. The group comprises thousands of unique synthetic organic chemicals that are extremely stable and persistent. Commercially manufactured since the 1940s, PFAS compounds have been used in manufacturing common consumer products, such as carpeting, clothing, furniture, outdoor equipment, and food packaging. Many industries have also used PFAS, including aerospace, automotive, aviation, electronics, and medical industries. One major source of PFAS contamination is Aqueous Film Forming Foam (AFFF), which is used for fire training and extinguishing petroleum fires and other flammable liquids.
Continue reading “Guidance for Investigating and Remediating PFAS Contamination in Washington State”How PFAS impact stormwater
Stormwater Solutions
David C. Richardson
April 14, 2023
A new substance found in residue from an experiment on refrigerants caught the attention of Dupont chemists nearly 100 years ago. They thought it had some interesting properties. It was resistant to water, grease, heat and decay. Soon it would be used to keep pots clean, to waterproof convertible car tops and to put out fires.
Taking on such household names as Teflon and Scotchgard, and deployed for varied uses as firefighting, and the manufacture of extruded plastics, it would eventually be applied to the glamorous world of cosmetics, and, in such workaday products as grease resistant fast-food wrappers and microwave popcorn bags.
Continue reading “How PFAS impact stormwater”Watershed Protection Plan – Olympic View Water & Sewer District
PACE Engineers, Inc.
Original 2018
Revised April 2023
Executive Summary
The Olympic View Water & Sewer District (District) is located in southwestern Snohomish County in the State of Washington and encompasses portions of the City of Edmonds, the Town of Woodway and unincorporated Snohomish County, including the communities of Esperance, Westgate, and Firdale Village.
Deer Creek, Willow Creek, Chase Lake and Chase Lake Pond, located within the District, are considered critical habitat for aquatic life and recreational use. Currently, Deer Creek is the District’s surface water source. The 228th Street SW Well Field is the District’s new aquifer water source and consists of two wells; one well was dug in 2014, and a second well was dug in 2016. Both wells are scheduled to begin treatment and use in 2019.
Continue reading “Watershed Protection Plan – Olympic View Water & Sewer District”Survey of PFAS in the Greater Lake Washington Watershed
Department of Ecology
October 2022
Introduction and problem statement
During summer 2020, the Washington State Department of Ecology’s (Ecology’s) Environmental Assessment Program initiated Phase 1 of a field study to address potential sources of per- and polyfluoroalkyl substances (PFAS) contamination in resident fish from Lake Washington, King County (Furl and Meredith 2010, Mathieu and McCall 2017, Mathieu 2022).
During Phase 1, we assessed concentrations of PFAS in Lake Washington and in potential contaminant pathways to the lake. The Phase 1 study design included characterization of PFAS concentrations in the lake and its direct tributaries, groundwater discharges, stormwater discharges, bridge runoff, and bulk atmospheric deposition (Wong and Mathieu 2021, Escobedo 2021).
Continue reading “Survey of PFAS in the Greater Lake Washington Watershed”Per- and Polyfluoroalkyl Substances Chemical Action Plan
Department of Ecology
September 2022
Executive Summary
Per- and polyfluoroalkyl substances (PFAS) are a family of more than 9,000 synthetic organic chemicals. PFAS can withstand high temperatures and survive highly corrosive environments. They are used in the manufacture of coatings, surface treatments, and specialty chemicals in cookware, carpets, food packaging, clothing, cosmetics, and other common consumer products. PFAS also have many industrial applications and are an active ingredient in certain types of fire- fighting foams (aqueous film-forming foams, or AFFF). PFAS coatings resist oil, grease, and water.
Continue reading “Per- and Polyfluoroalkyl Substances Chemical Action Plan”Per- and Polyfluoroalkyl Substances Data Gap Investigation Work Plan Lower Issaquah Valley
Farallon Consulting
July 15, 2022
Focus on: PFAS Cleanup Levels
Department of Ecology
July 2022
Groundwater Flow and PFAS Transport Modeling Report Issaquah, Washington
Geosyntec Consultants
September 13, 2021
Introduction
Geosyntec Consultants (Geosyntec) has prepared this Groundwater Flow and Per- and Poly- Fluoroalkyl Substances (PFAS) Transport Modeling Report (Report) on behalf of the City of Issaquah (City). Geosyntec performed this work on behalf of the City, Eastside Fire and Rescue (EFR), and the Washington State Department of Ecology (Ecology), collectively referred to as the Issaquah Valley PFAS Partnership (the Partnership). The Partnership is conducting additional investigation of PFAS contamination of the Issaquah Valley Aquifer, through legislative funding provided to Ecology. Farallon Consulting, LLC (Farallon), on behalf of EFR, is the leading consultant for the field investigations that support the model development.
Per- and Polyfluoroalkyl Substances (PFAS) Additional Characterization Study Summary Report
Lower Issaquah Valley
Issaquah, Washington
Farallon Consulting, L.L.C.
April 14, 2021
Executive Summary
Farallon has prepared this Summary Report on behalf of Eastside Fire and Rescue to summarize the work performed and analytical results for the Lower Issaquah Valley Per- and Polyfluoroalkyl Substances Additional Characterization Study performed from March through October 2020 (Study).
Continue reading “Per- and Polyfluoroalkyl Substances (PFAS) Additional Characterization Study Summary Report”Minimizing the environmental impact of PFAS by using specialized coagulants for the treatment of PFAS polluted waters and for the decontamination of firefighting equipment
Emerging Contaminants Journal
February 22, 2021
Abstract
Per- and poly uoroalkyl substances (PFASs) represent an increasingly global challenge for keeping water and soil“non-toxic”. 100 of millions of people are exposed to PFAS levels of concern, in particular, around PFAS production sites and sites where PFASs are/were used and released or disposed.
Continue reading “Minimizing the environmental impact of PFAS by using specialized coagulants for the treatment of PFAS polluted waters and for the decontamination of firefighting equipment”Per – and Polyfluoroalkyl Substances Characterization Study Work Plan Addendum
Lower Issaquah Valley
Issaquah, Washington
Farallon Consulting, L.L.C.
April 3, 2020
Introduction
Farallon Consulting, L.L.C. (Farallon) has prepared this addendum (Addendum) to the Per- And Poly-Fluoroalkyl Substances Characterization Study Work Plan, Lower Issaquah Valley, Issaquah, Washington dated 2018, prepared by Farallon (2018) for Eastside Fire & Rescue (EFR) (Work Plan), to present the work elements and rationale to further characterize the nature and extent of per- and poly-fluoroalkyl substances (PFAS) in soil and groundwater in a portion of the Lower Issaquah Valley in Issaquah, Washington (Figure 1).
Continue reading “Per – and Polyfluoroalkyl Substances Characterization Study Work Plan Addendum”Olympic View Water and Sewer District Wellhead Protection Area Delineation Deer Creek Springs and 228th St. Wellfield
Robinson Noble Inc.
August 2018
1.0 Introduction and Background
The Olympic View Water & Sewer District (District) provides water to an estimated 13,000 customers within an approximately two square mile service area in southwestern Snohomish County (PACE, 2009). The District currently receives about 60% of their supply water through an intertie with the City of Seattle. The remaining 40% is derived from the District’s water treatment plant at Deer Creek Springs.
Continue reading “Olympic View Water and Sewer District Wellhead Protection Area Delineation Deer Creek Springs and 228th St. Wellfield”Letter responding to PGG letter of findings
June 8, 2018
Subject: Response to Pacific Groundwater Group’s letter of findings, dated June 1, 2018, regarding the proposed use of UIC Wells at the Madrona Elementary School in Edmonds, Washington
Lynne Danielson, General Manager
Olympic View Water and Sewer District
8128 228 Street SW
Edmonds, WA 98026
Dear Lynne,
Robinson Noble has reviewed the recent report prepared by Pacific Groundwater Group (PGG), dated June 1, 2018, which was completed to provide an assessment of the Edmonds School District’s (ESD) proposed use of underground injection control (UIC) wells to manage storm water at the Madrona Elementary School in Edmonds, Washington. A copy of the PGG report is attached with this letter for reference.
Madrona School Stormwater Management System Assessment
Pacific Groundwater Group
June 1, 2018
Report from Pacific Groundwater Group to:
Mr. Edward Peters
Edmonds School District #15
20420 68th Avenue West
Lynnwood, WA 98036
PGG has been contracted by the Edmonds School District No. 15 (the District) in Edmonds, WA to perform technical evaluation of selected aspects of the Madrona School stormwater management system (the Project). ESD requested that PGG address the six questions presented below. Each question is followed by a summary of our response as presented in the rest of the document.
Continue reading “Madrona School Stormwater Management System Assessment”