PFAS in landfill sludge

Landfill PFAS Study: Concentrations After Leachate Treatment

September 20, 2022

SCS Engineers Environmental Consulting and Contracting PFAS Landfill
PFAS landfill study by a collaboration of the schools in Florida and the EPA; supported by a technical advisory group.

 

The objective of this study was to evaluate a cross-section of full-scale on-site landfill treatment systems to measure changes in PFAS concentrations. Leachate samples were collected before and after treatment from 15 facilities and were evaluated for 26 PFAS, including 11 perfluoroalkyl carboxylic acids (PFCAs), 7 perfluoroalkyl sulfonic acids (PFSAs), and 8 perfluoroalkyl acid precursors (PFAA-precursors). The transformation of precursors was evaluated by the total oxidizable precursor (TOP) assay. Results showed no obvious reductions in total measured PFAS (∑26PFAS) for on-site treatment systems including ponds, aeration tanks, powdered activated carbon (PAC), and sand filtration. Among evaluated on-site treatment systems, only systems fitted with reverse osmosis (RO) showed significant reductions (98-99 %) of ∑26PFAS in the permeate. Results from the TOP assay showed that untargeted PFAA-precursors converted into targeted short-chain PFCAs increasing ∑26PFAS in oxidized samples by 30 %, on average.

Overall, the results of this study confirm the efficacy of RO systems and suggest the presence of additional precursors beyond those measured in this study. SCS is part of the technical advisory group for this collaboration of the schools in Florida and the EPA. SCS’s Liquid Management Practice is helping the group with on-site work at landfills.

 

The study is publishing here: Concentrations of perfluoroalkyl and polyfluoroalkyl substances before and after full-scale landfill leachate treatment.

Chen Y, Zhang H, Liu Y, Bowden JA, Tolaymat TM, Townsend TG, Solo-Gabriele HM.
Waste Manag. 2022 Sep 6;153:110-120. doi: 10.1016/j.wasman.2022.08.024. Online ahead of print.
PMID: 36084369

 

The following universities with EPA are affiliated with the study:

  1. Department of Civil, Architectural, and Environmental Engineering, College of Engineering, University of Miami, Coral Gables, FL.
  2. Department of Environmental Engineering Sciences, College of Engineering, University of Florida, Gainesville, FL.
  3. Department of Environmental Engineering Sciences, College of Engineering, University of Florida, Gainesville, FL; Center for Environmental and Human Toxicology & Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL.
  4. Center for Environmental Solutions and Emergency Response, Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, OH.
  5. Department of Civil, Architectural, and Environmental Engineering, College of Engineering, University of Miami, Coral Gables, FL.

 

 

 

 

Posted by Diane Samuels at 6:00 am

Managing PFAS in Landfill Leachate and Sludge In a Changing Regulatory Climate

July 21, 2022

Managing PFAS in Landfill Leachate and Sludge In a Changing Regulatory Climate 

Did you miss the free client webinar? No problem; it’s now available for you on-demand.  Feel free to share this link with others who may be interested too.

 

 

Landfill operators must contend with incoming PFAS-laden waste streams while managing leachate and sludges potentially contaminated with concentrated levels of PFAS. Sifting through incoming waste, C&D, and special wastes is not feasible. Staying abreast of the rapidly changing regulatory climate and treatment options will help you plan for the ultimate outcomes.

In July’s client webinar, our panelists aim to clarify the flurry of recent plans, health advisories, and announcements while discussing where the analytical methods fall short. We’ll cut through the intimidating headlines in the media and focus on the EPA Action Plan and recent regulatory and proposed changes that are worth monitoring.

Following trends across North American landfills, we will discuss available and promising leachate treatment options. SCS’s engineers, scientists, and landfill operations experts will be at your service throughout the forum and afterward.

                                                              

This educational, non-commercial webinar with a Q&A forum throughout is free and open to all who want to learn more about landfill PFAS regulations and leachate treatments. We recommend this month’s discussion for landfill owners/operators, solid waste planners, environmental engineers, municipalities, and environmental agency staff.

Certificates of Attendance are available for attendees who register on Zoom and attend the live session. Sharing another person’s link to join the live session does not register your name. SCS does not sell or share any data collected at Zoom registration.

 

 

 

 

Posted by Diane Samuels at 2:00 pm

SCS Webinar: Untangling the Proposed PFAS Regulations

July 11, 2022

proposed PFAS regulation impacts some landfill leachate and sludge

 

SCS Engineers is hosting a panel on proposed PFAS regulations as EPA continues to work on its goal of adding PFOA and PFOS as hazardous constituents under CERCLA – aka Superfund. EPA is also considering adding certain PFAS as hazardous constituents under Appendix VIII of the Resource Conservation and Recovery Act or RCRA, giving EPA authority to require RCRA corrective action for PFAS at RCRA sites. With data for about 14 PFAS constituents, including some of the newer ones commonly known as GenX, and based on toxicity data, the EPA supports the development of standards for risk-based concentration levels and risk screening levels for ingesting PFAS.

In July’s client webinar, our panelists aim to bring clarity and advice to those operating landfills that may become subject to regulations. The free webinar features a panel of speakers clarifying the recent plans, headlines and health advisories surrounding PFAS, as well as sharing some promising leachate treatment options. SCS’s engineers, scientists and landfill operations experts will speak during the forum and answer your questions. They are also available for follow-up after the 2 p.m. July 21 webinar.

Landfill operators who manage waste streams, leachate and sludges possibly laden with PFAS can attend this event and learn about the latest regulatory changes and proposals surrounding PFAS.

 

Reserve your spot, or learn more about proposed PFAS regulations

Managing PFAS in Landfill Leachate and Sludge In a Changing Regulatory Climate.

 

 

 

 

 

Posted by Diane Samuels at 6:00 am

Untangling the Proposed PFAS Regulations – SCS Webinar

July 6, 2022

SCS Engineers Environmental Consulting and Contracting
Landfill operators must contend with incoming PFAS-laden waste streams while managing leachate and sludges potentially contaminated with concentrated levels of PFAS.

 

Reprint from a Recycling Today article by Managing Editor Bob Gaetjens.

SCS Engineers to host panel on proposed PFAS regulations

As the EPA considers regulating PFAS, SCS Engineers helps bring clarity and advice to those operating landfills that may become subject to regulations.

Per- and polyfluoroalkyl substances (PFAS) are under the sharp gaze of the U.S. Environmental Protection Agency (EPA), which plans to determine how toxic the substance is.

There now is data for about 14 PFAS constituents, including some of the newer ones commonly known as GenX. Based on toxicity data, the EPA supports the development of standards for risk-based concentration levels and risk screening levels for ingesting PFAS. The state of Maine announced earlier this year a ban on PFAS in landfill leachate.

The EPA is considering whether to propose that perfluorooctanoic acid (PFOA) and perfluorooctanicsulfonic acid (PFOS) be classified as hazardous PFAS constituents under Appendix VIII of the Resource Conservation and Recovery Act (RCRA), giving the federal agency the authority to require corrective action for PFAS and RCRA sites.

It is with this background that SCS Engineers is hosting a webinar featuring a panel of speakers clarifying the recent plans, headlines and health advisories surrounding PFAS, as well as sharing some promising leachate treatment options. SCS’s engineers, scientists and landfill operations experts will be featured during the forum and can be available for follow-up after the 2 p.m. July 21 webinar.

Landfill operators who manage waste streams, leachate and sludges possibly laden with PFAS can attend this event and learn about the latest regulatory changes and proposals surrounding PFAS.

Certificates of attendance are available for attendees who registered on Zoom and attended the live session.

 

Reserve your spot, or learn more about Managing PFAS in Landfill Leachate and Sludge In a Changing Regulatory Climate here.

 

 

 

 

 

Posted by Diane Samuels at 6:00 am