BEGIN:VCALENDAR VERSION:2.0 METHOD:PUBLISH PRODID:-//Tendenci - The Open Source AMS for Associations//Tendenci Codeba se MIMEDIR//EN BEGIN:VEVENT DESCRIPTION:--- This iCal file does *NOT* confirm registration.\r\nEvent d etails subject to change. ---\r\nhttps://www.grac.org/events/120/\r\n\r\nE vent Title: GRACast: Fate of AFFF-Derived PFAS in a Wastewater Treatment P lant\r\nStart Date / Time: Aug 02, 2017 12:00 PM US/Pacific\r\nLocation: \ r\nPresented by:\r\nErika Houtz, PhD, PFAS Analytical LeadArcadis\r\n \r\n Recently, poly- and perfluoroalkyl substances (PFAS) derived from aqueous film forming foams (AFFF) were measured at relatively high levels in efflu ent in some San Francisco Bay Area wastewater treatment plants. One treatm ent plant was impacted by sewage from an Air Force Base and the other was located at an airport, where AFFF is introduced mainly after annual perfor mance testing. A follow-up study was commissioned to investigate the fate of PFAS at the airport wastewater treatment plant before, during, and afte r a major AFFF introduction event. In addition to targeted analysis of PFA S by LC-MS/MS, AFFF transformation products were identified using high res olution time of flight mass spectrometry and the total oxidizable precurso r (TOP) assay was used to measure total PFAS. This study provides insight into the rate at which polyfluorinated ingredients in AFFF are transformed during treatment processes and form terminal, measurable perfluoroalkyl a cid products such as PFOS and PFOA. The overall loading of PFAS to the Bay from the AFFF testing as well as its clearance through the treatment plan t were also investigated. This work has practical importance for the manag ement of effluent after accidental or intentional AFFF introduction to a t reatment plant, particularly when PFAS exposure to downstream users is of concern.\r\n \r\n*Early Registration (July 27) is $75 for Members* and $10 0 for Non-Members**Registration after July 27 is $100 for Members* and $12 5 for Non-Members* \r\nSPEAKER BIO:\r\n\r\nDr. Erika Houtz has eight years of academic and professional experience investigating the environmental i mpacts of PFAS. She has extensive experience in developing analytical and experimental methods for the measurement of PFAS in environmental and huma n samples. She has also investigated and published on the fate and transpo rt of PFAS in natural and engineered systems, with a particular emphasis o n the fate of PFAS found in aqueous film forming foams. Since joining Arca dis in 2016, she has been engaged in numerous PFAS projects, including dev eloping guidance for site characterization, developing conceptual site mod els at contaminated sites, evaluating the efficacy of treatment technologi es, working with laboratories to commercialize new PFAS analysis technique s, and tracking of the evolving PFAS regulatory landscape in the U.S. and globally.\r\n \r\nMODERATOR BIO:\r\n\r\nKatharine North is a Senior Hydrog eologist with Haley &\; Aldrich in Houston, Texas. She has over 10 year s of experience with site assessment and applied research. Her primary are a of expertise involves developing and using molecular biological tools, s pecifically compound-specific isotope analysis (CSIA), to understand conta minant biodegradation. Ms. North has used CSIA at a variety of sites in Ca lifornia to evaluate the potential for monitored natural attenuation of fu el oxygenates and, most recently, 1,4-dioxane. Her work has helped design more targeted and efficient sampling at sites impacted with petroleum hydr ocarbons and chlorinated solvents. Ms. North holds a B.A. in geology from Middlebury College and a M.S. in Hydrologic Sciences from the University o f California, Davis.\r\n --- This iCal file does *NOT* confirm registratio n.Event details subject to change. ---\r\n\r\n--- By Tendenci - The Open S ource AMS for Associations ---\r\n UID:uid120@grac.org SUMMARY:GRACast: Fate of AFFF-Derived PFAS in a Wastewater Treatment Plant DTSTART:20170802T190000Z DTEND:20170802T200000Z CLASS:PUBLIC PRIORITY:5 DTSTAMP:20240329T063021Z TRANSP:OPAQUE SEQUENCE:0 X-ALT-DESC;FMTTYPE=text/html:
Presented by:
Erika Houtz, PhD, PFAS Analytica
l Lead
Arcadis
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Recently, poly- and perfluoroalkyl substances (PFAS) derived from aq ueous film forming foams (AFFF) were measured at relatively high levels in effluent in some San Francisco Bay Area wastewater treatment plants. One treatment plant was impacted by sewage from an Air Force Base and the othe r was located at an airport, where AFFF is introduced mainly after annual performance testing. A follow-up study was commissioned to investigate the fate of PFAS at the airport wastewater treatment plant before, during, an d after a major AFFF introduction event. In addition to targeted analysis of PFAS by LC-MS/MS, AFFF transformation products were identified using hi gh resolution time of flight mass spectrometry and the total oxidizable pr ecursor (TOP) assay was used to measure total PFAS. This study provides in sight into the rate at which polyfluorinated ingredients in AFFF are trans formed during treatment processes and form terminal, measurable perfluoroa lkyl acid products such as PFOS and PFOA. The overall loading of PFAS to t he Bay from the AFFF testing as well as its clearance through the treatmen t plant were also investigated. This work has practical importance for the management of effluent after accidental or intentional AFFF introduction to a treatment plant, particularly when PFAS exposure to downstream users is of concern.
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*E arly Registration (July 27) is $75 for Members* and $100 for Non-Members*< br />*Registration after July 27 is $100 for Members* and $125 for Non-Mem bers*
Dr. Erika Houtz has eight years of academi c and professional experience investigating the environmental impacts of P FAS. She has extensive experience in developing analytical and experimenta l methods for the measurement of PFAS in environmental and human samples. She has also investigated and published on the fate and transport of PFAS in natural and engineered systems, with a particular emphasis on the fate of PFAS found in aqueous film forming foams. Since joining Arcadis in 2016 , she has been engaged in numerous PFAS projects, including developing gui dance for site characterization, developing conceptual site models at cont aminated sites, evaluating the efficacy of treatment technologies, working with laboratories to commercialize new PFAS analysis techniques, and trac king of the evolving PFAS regulatory landscape in the U.S. and globally. p>
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Katharine North \;is a Senior Hydrogeologist wit h Haley &\; Aldrich in Houston, Texas. She has over 10 years of experie nce with site assessment and applied research. Her primary area of experti se involves developing and using molecular biological tools, specifically compound-specific isotope analysis (CSIA), to understand contaminant biode gradation. Ms. North has used CSIA at a variety of sites in California to evaluate the potential for monitored natural attenuation of fuel oxygenate s and, most recently, 1,4-dioxane. Her work has helped design more targete d and efficient sampling at sites impacted with petroleum hydrocarbons and chlorinated solvents. Ms. North holds a B.A. in geology from Middlebury C ollege and a M.S. in Hydrologic Sciences from the University of California , Davis.
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