Menu
Log in


Log in



Webinar: Predictability and Practicability of attaining Pennsylvania’s Proposed MCLs for PFOS and PFOA in Groundwater (60 mins.)

  • September 15, 2022
  • 2:00 PM - 3:00 PM
  • Webinar
  • 82

Registration


Registration is closed

Predictability and Practicability of Attaining Pennsylvania’s Proposed MCLs for PFOS and PFOA in Groundwater

Level: Intermediate

Presenter

Jeffrey R. Hale, P.G.

Senior Principal Professional

Kleinfelder

Please read:  After registering on our site you'll receive a PCPG confirmation email indicating Action Required in the subject line. Your registration is not complete until you click through the unique link in that email directing you to the GoToWebinar web site, enter your name, email address, consent to terms and conditions, and click the Register button.  Check your spam filter if you do not see the PCPG 'Action Required' email within 60 seconds of registering, here; ask IT to release the Email; if you use Gmail, our system workflow emails are received into some other Gmail folder.  Please white-list all @pcpg.org emails.

PCPG will circulate a PDH certificate documenting registrant’s participation time, not to exceed 60 minutes, within 72 hours of the conclusion of the webinar.

Level: Intermediate

Who should attend: This presentation will be of particular interest to  consultants, regulators, and environmental managers interested in PFAS and contaminant hydrogeology.

Webinar Overview (updated 24 August):   Pennsylvania has initiated rulemaking to establish maximum contaminant levels (MCLs) for the per and polyfluorinated alkyl substances PFOS (18 ng/L) and PFOA (14 ng/L).  These values are intended to be health-protective, and are less stringent than U.S. EPA’s recently revised health advisory levels (HALs) of 0.02 ng/L and 0.004 ng/L for PFOS and PFOA, respectively.  Other states (Michigan, New Hampshire, and New Jersey) have promulgate slightly more stringent criteria than those proosed for Pennsylvania.

These MCLs are intended to be health protective at the tap / point of use.  However, the practicability of attaining these criteria in groundwater and the distance from source at which these regulatory criteria are attained without intervention have received little evaluation.  The vast majority of PFAS mass in groundwater is represented by relatively few samples that are more than 10X the proposed MCLs for PFOS and PFOA.  Conversely, relatively little mass of PFAS in groundwater corresponds to many samples with PFAS concentrations between the proposed Pennsylvania MCLs and 10X those MCLs.  This results in long PFAS plumes relative to ng/L MCLs with little mass in the distal extent of the PFAS plume.  Empirical fate & transport modeling using available data sources demonstrates expected distances to attainment of Pennsylvania’s proposed MCLs for PFOS and PFOA, as well as the sensitivity of that attainment distance to other state and federal regulatory criteria and guidance values.

About our presenter:  Jeffrey R. Hale, PG is located in Pittsburgh, PA where he has been a Pennsylvania Professional Geologist since 2000.  Jeff is a Senior Principal Professional at Kleinfelder.  He provides consultation, strategy, and direction for challenging environmental and natural resources issues with emphasis on PFAS, emerging contaminants, complex sites, remediation, liability management, and environmental forensics.


 

 



 

Copyright 2021

All Rights Reserved

Pennsylvania Council of Professional Geologists
116 Forest Drive

Camp Hill, Pennsylvania 17011

(717) 730-9745