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DTSTART;TZID=America/New_York:20260408T123000
DTEND;TZID=America/New_York:20260408T133000
DTSTAMP:20260418T174037
CREATED:20260327T221819Z
LAST-MODIFIED:20260327T221819Z
UID:10000826-1775651400-1775655000@www.parsons.com
SUMMARY:Webinar | Complex Remedial Action For Impacted Soil And Sediment At A New York State Superfund Site
DESCRIPTION:Join us on April 8\, 2026 for a technical webinar regarding Complex Remedial Action For Impacted Soil And Sediment At A New York State Superfund Site \nBackground/Objectives\nUnder the New York State Department of Environmental Conservation State Superfund Program\, the C&D Power Systems site was investigated and remediated in accordance with the New York State Hazardous Management Program requirements and Toxic Substance Control Act (TSCA) regulations for polychlorinated biphenyls (PCB) containing materials. The objective was to implement a protective\, compliant remedy that reduced risk while limiting impacts to surrounding wetlands and tributary areas. \n\nApproach/Activities\nThe remedy integrated excavation\, stabilization\, and off-site disposal of PCB-\, lead-\, and cadmium-impacted lagoon soils; in-situ solidification of subsurface lagoon soils; excavation and stabilization of surface soils and tributary sediment; placement of treated soils and sediment within the lagoon; installation of a paved cover system; and restoration of upland and tributary work areas. \n\nResults/Lessons Learned\nThis remedial action addressed over one acre of wetlands\, 2500 cubic yards (CY) of impacted tributary sediment\, 14\,000 tons of TSCA-level PCB-impacted material\, and 4\,000 CY of additional PCB-\, lead-\, and/or cadmium-impacted material. Using both in-situ and ex-situ methods improved constructability and compliance. Detailed oversight\, proactive coordination\, and adaptability helped maintain progress across tightly regulated multi-media activities. \nPresenters\nMichael (Mike) Broschart Mike holds a Bachelor of Science in Environmental Engineering from Syracuse University and has worked for Parsons for more than 21 years. He has extensive practical engineering experience in large-scale civil and\nenvironmental engineering design and construction projects. \nJessica Scheler\, EIT Jessica holds a Bachelor of Engineering in Environmental Engineering from the University of Pittsburgh and has been working as an engineer at Parsons for four years. She has worked on a variety of environmental investigation and remediation projects \nMicrosoft Teams Meeting\nJoin on your computer\, mobile app or room device: Click here to join the meeting.\nPhone Conference ID: 246 026 916 142 17\nPasscode: KS67HE66 \nPlease visit the Parsons YouTube channel where video recordings of our previous\ntechnical webinars are available for viewing.
URL:/event/webinar-complex-remedial-action-for-impacted-soil-and-sediment-at-a-new-york-state-superfund-site/
LOCATION:Online
CATEGORIES:Environmental
ATTACH;FMTTYPE=image/jpeg:/wp-content/uploads/2022/02/events_category_images_webinar24.jpg
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20260311T123000
DTEND;TZID=America/New_York:20260311T133000
DTSTAMP:20260418T174037
CREATED:20260302T221109Z
LAST-MODIFIED:20260302T233703Z
UID:10000821-1773232200-1773235800@www.parsons.com
SUMMARY:Webinar | Residual NAPL And PAH Remediation
DESCRIPTION:Join us on March 11\, 2026 for a technical webinar regarding Residual NAPL And PAH Remediation: The Critical Role of Pre-Design Investigations\, Treatability Testing\, and Pilot Testing \nBackground/Objectives\nPre-design investigations (PDIs)\, bench-scale treatability testing\, and pilot testing are critical for reducing uncertainty prior to remedial design. At a former creosoting facility Superfund site\, in situ chemical oxidation (ISCO) was identified as the primary selected remedy. The objective of the presented work was to refine the conceptual site model (CSM) and evaluate cost-effective\, feasible solutions through pre-design investigation and treatability testing to inform future pilot testing and full-scale design. \nApproach/Activities\nThe 2025 PDI integrated TarGOSTВ® laser-induced fluorescence\, hydraulic profiling\, soil borings\, and groundwater sampling to characterize non-aqueous phase liquid\, soil\, and groundwater impacts at the site. Bench-scale treatability testing was used to evaluate persulfate-based ISCO within two distinct lithologies\, silty clays and weathered limestone\, to assess oxidant demand\, treatment effectiveness\, and zone-specific delivery feasibility. \nResults/Lessons Learned\nThe PDI results refined the CSM\, identifying more significant impacts in a weathered carbonate bedrock than previously understood. Treatability testing of ISCO demonstrated substantial reductions in polycyclic aromatic hydrocarbons (PAHs) in mixed silty clays\, whereas limited PAH destruction and a high natural persulfate oxidant demand were measured in weathered limestone. A second testing phase is evaluating enhanced anaerobic bioremediation for the limestone. The second phase was informed by a successful application of sulfate at a different Superfund site treating PAHs. These findings highlight that PDI and bench-scale testing can prevent high-cost errors\, leading to data-driven\nremediation designs. \nPresenters\nClaire Harris\, PG\, Claire is a Senior Hydrogeologist with more than seven years of experience supporting site characterization and risk-based remediation. \nGlenn Ulrich\, PhD\, Glenn is a technical director specializing in contaminant fate and transport\, the sustainable remediation of contaminants and methane\, and technology development. \nTo Join The Webinar\nJoin on your computer\, mobile app or room device: Click here to join the meeting. \nPhone Conference ID: 279 843 247 079 51\nPasscode: st7N4sW7 \nPlease visit the Parsons YouTube channel where video recordings of our previous\ntechnical webinars are available for viewing.
URL:/event/webinar-residual-napl-and-pah-remediation/
LOCATION:Online
CATEGORIES:Environmental
ATTACH;FMTTYPE=image/jpeg:/wp-content/uploads/2022/02/events_category_images_webinar24.jpg
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DTSTART;TZID=America/New_York:20260211T123000
DTEND;TZID=America/New_York:20260211T133000
DTSTAMP:20260418T174037
CREATED:20260203T215424Z
LAST-MODIFIED:20260203T215657Z
UID:10000817-1770813000-1770816600@www.parsons.com
SUMMARY:WEBINAR: PFAS In Stormwater Control Measures: Removal\, Distribution\, and Long-Term Fate
DESCRIPTION:Overview\nJoin us for our next technical webinar discussing “PFAS in Stormwater Control Measures” on February 11th at 12:30 EST. \nBackground/Objectives\nPer-and polyfluoroalkyl substances (PFAS) in stormwater pose emerging risks to surface waters and sediments\, particularly at aqueous film-forming foam (AFFF) impacted sites. Stormwater control measures (SCMs) are widely used to manage stormwater volumes and pollutant loads\, yet their PFAS performance is not well understood. This work evaluates PFAS concentrations\, distribution\, and long‑term behavior across multiple SCMs to clarify their treatment role and inform improved stormwater management. \nApproach/Activities\nThis study monitored 21 storm events at multiple SCMs (including biofilters\, media filters\, and a retention pond) to evaluate PFAS in inlet and outlet samples\, quantify dissolved and particulate phases\, and estimate PFAS removal efficiency. In an AFFF‑impacted pond\, monthly monitoring and a hydrologic model simulated pond volume and PFAS concentration dynamics over one year to identify key controlling processes. \nResults/Lessons Learned\nSCMs showed limited PFAS removal\, particularly in the dissolved phase\, which dominated concentrations. Chain length influenced PFAS association with solids\, but particulate removal was inconsistent\, resulting in low overall reduction. In the AFFF‑impacted pond\, PFAS accumulated over time\, with precursor transformation and evaporation driving concentration increases. These results illustrate how long‑residence‑time SCMs can act as long‑term PFAS sinks and even secondary sources. \nThis webinar has been approved for 1 professional development hour (PDH) credit for New York Professional Geologists and New York/New Jersey Professional Engineers. For other states\, please refer to your licensing board guidance for eligibility. \nAbout the Presenter\nCÉSAR GÓMEZ-AVILA\, PHD\nCésar is an environmental engineer with a PhD in Chemical Engineering\, specializing in stormwater management\, sediment recontamination\, and contaminant fate and transport. He has extensive experience with PFAS\, hydrophobic organic compounds (HOCs)\, microplastics\, and trace metals in\nenvironmental systems. \nTo Join The Meeting\nMicrosoft Teams Meeting\nJoin on your computer\, mobile app or room device: Click here to join the meeting.\nPhone Conference ID: 234 254 983 072 44\nPasscode: q4fB2pY9\nPlease visit the Parsons YouTube channel where video recordings of our previous\ntechnical webinars are available for viewing.
URL:/event/webinar-pfas-in-stormwater-control-measures-removal-distribution-and-long-term-fate/
CATEGORIES:Environmental,PFAS,Water and Wastewater
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20260121T123000
DTEND;TZID=America/New_York:20260121T133000
DTSTAMP:20260418T174037
CREATED:20260112T153933Z
LAST-MODIFIED:20260116T183706Z
UID:10000815-1768998600-1769002200@www.parsons.com
SUMMARY:Webinar | Firefighting Foam Transition: PFAS Cleanout Challenges and Solutions
DESCRIPTION:Join us on January 21\, 2026 for a technical webinar regarding Firefighting Foam Transition: PFAS Cleanout Challenges And Solutions. \nBackground/Objectives\nFluorine-free foams (F3) are replacing per- and polyfluoroalkyl substance (PFAS) containing aqueous film-forming foams (AFFF) for fire suppression to reduce environmental\, health\, and liability risks related to PFAS. Transitioning to F3 requires effective cleanout solutions to prevent residual PFAS impacts and ensure system compatibility. This presentation aims to address these challenges and showcase sustainable\, cost-effective technologies for PFAS remediation. \nApproach/Activities\nThe flocculant technology PerfluorAdв„ў\, developed by Cornelson\,В effectively removes PFAS that accumulate on internal surface areas of fixed and mobile fire suppression systems. Flocs are isolated\, generating a low volume of PFAS-impacted solids for minimized waste disposal. Rinsate is treated on-site and typically compliant with sewer discharge requirements\, further reducing waste disposal costs. Effectiveness is documented through real-world applications and data from airports and other facilities. \nResults/Lessons Learned\nApplying flocculant technology can effectively remove PFAS from fire suppression systems\, reduce waste generation\, and minimize rebound risks. Cleanout projects using this technology have demonstrated cost savings\, operational efficiency\, and environmental benefits compared to traditional methods. Lessons learned highlight the importance of tailored solutions\, ongoing process optimization\, and data-driven improvements using advanced analytical techniques to address diverse fire suppression systems. \nPresenters\nGREG KNIGHT Greg is the PerfluorAdв„ў Operations Manager for TRS Group\, a Parsons company\, working exclusively on AFFF cleanouts since 2021. Greg oversees implementation of all TRS Group AFFF cleanouts. \nLAUREN TURNER\, PhD Lauren is an environmental engineer supporting client projects and research objectives for contaminated sites. Lauren leverages research experiences and PFAS knowledge to advance treatment options. \nTo Join The Webinar\nJoin on your computer\, mobile app or room device:\nJoin the meeting now\nMeeting ID: 254 973 769 066 59\nPasscode: qb7zw9RA \nPlease visit the Parsons YouTube channel where video recordings of our\nprevious technical webinars are available for viewing.
URL:/event/webinar-firefighting-foam-transition/
LOCATION:Virtual Event
CATEGORIES:Environmental,PFAS,Water and Wastewater
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20251119T123000
DTEND;TZID=America/New_York:20251119T133000
DTSTAMP:20260418T174037
CREATED:20251110T190038Z
LAST-MODIFIED:20251110T190038Z
UID:10000780-1763555400-1763559000@www.parsons.com
SUMMARY:Webinar | Soil-Bentonite Slurry Walls: What We Have Learned From The Last 50 Years Of Practice And Research
DESCRIPTION:Background/Objectives\nSoil-bentonite (SB) slurry trench cutoff walls have been utilized for over five decades\, gaining widespread adoption in the late 1970s for groundwater control at excavation sites and in the early 1980s for control of contaminant migration at contaminated sites. This presentation aims to review advancements in our understanding of soil-bentonite properties and to demonstrate how these insights have contributed to improved design practices for environmental containment systems. \nApproach/Activities\nThrough case studies and research\, significant progress has been made in understanding the key performance characteristics of SB slurry walls. This presentation will explore critical aspects of SB behavior\, including the state of stress within the wall\, consolidation and time dependent behavior\, hydraulic conductivity\, durability\, wet/dry cycles\, diffusion\, compatibility of SB with contaminants in the environment\, and osmotic (membrane) behavior. These findings will be discussed in the context of their implications for design optimization and long-term performance. \nResults/Lessons Learned\nSB cutoff walls have been in place as successful environmental containment measures since the early 1980s. Our understanding of properties and behavior has improved our ability to design vertical barriers for environmental containment. Vertical barriers\, as a component of site remediation\, can achieve long-term protection of the public health and the environment in a more sustainable manner as compared to more active remediation measures. \nPresenter\nJEFFREY C. EVANS\, PHD\, PE\, BC.GE\, F.ASCE: Jeffrey is Professor Emeritus at Bucknell University and a Principal Geotechnical Engineer at Parsons. Jeffery has extensive teaching\, research\, and consulting experience with a wide variety of geotechnical and environmental projects. \nMicrosoft Teams Meeting\nJoin on your computer\, mobile app or room device: Click here to join the meeting.\nMeeting ID: 297 876 453 374\nPasscode: Z4Lz34QL \nPlease visit the Parsons YouTube channel where video recordings of our previous\ntechnical webinars are available for viewing
URL:/event/webinar-soil-bentonite-slurry-walls-what-we-have-learned-from-the-last-50-years-of-practice-and-research/
LOCATION:Online
CATEGORIES:Environmental
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