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EPA to Regulate PFOA/PFOS as Hazardous Substances
On January 10, 2022, EPA submitted a proposed rule to the Office of Management and Budget (OMB) to designate perfluorooctane sulfonate...
Jan 14, 20221 min read


EPA to Regulate PFOA/PFOS as Hazardous Waste
On October 26, 2021, EPA announced that they would begin a two-step rulemaking process to list perfluorooctanoic acid (PFOA),...
Nov 2, 20211 min read


EPA Returns to 2015 SSM SIP Policy
On September 30, 2021, EPA issued a start, shutdown, and malfunction (SSM) memo withdrawing its October 9, 2020, memo and returning to...
Oct 5, 20211 min read


Practical Use of Drones for Diverse Infrastructure Projects
In September 2021 the American Society for Civil Engineers (ASCE) sponsored a half-day professional development course on using drones at...
Oct 1, 20211 min read


New Presidential Administration: Big Air & Waste Changes?
In February 2021 Stephen B. Ellingson, Ph.D. collaborated with Richard G. Glaze, Jr., Barnes & Thornburg LLP to deliver a presentation to...
Feb 6, 20211 min read


Georgia Environmental Protection Division Guidance Documents
In October 2020, Stephen B. Ellingson, Ph.D. provided a status update and examples of how to effectively use the Georgia Environmental...
Oct 14, 20201 min read


Area Averaging Approaches
In July 2020, the Georgia Brownfield Association (GBA) sponsored a virtual workshop on the Georgia Environmental Protection Division’s...
Jul 30, 20201 min read


Recap of recent Vatten presentations
Practical Use of Drones for Diverse Infrastructure Projects In April 2020 the American Society for Civil Engineers (ASCE) sponsored a...
May 6, 20201 min read


Michigan Approves Drinking Water Standards forSeven Per- and Polyfluoroalkyl Substances (PFAS)
On February 27, 2020, the Environmental Rules Review Committee of the Michigan Department of Environment, Great Lakes, and Energy (EGLE)...
Mar 3, 20204 min read


Soil-to-Groundwater Leaching Pathway Workshop
Workshop on the Georgia Division of Environmental Protection’s (Ga EPD) new soil-to-groundwater leaching guidance
Mar 3, 20201 min read


Soil-to-Groundwater Leaching Approaches
In February 2020, the Georgia Brownfield Association (GBA) sponsored a workshop on leaching assessments. Stephen B. Ellingson, Ph.D....
Feb 25, 20201 min read


California Lowers Response Levels for PFOA and PFOS
On February 6, 2020, the California Water Resources Control Board (WRCB) announced it was lowering the response levels (RLs) for...
Feb 17, 20201 min read
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