Log in


Courses & Events

Upcoming PCPG events

    • June 22, 2022
    • 1:00 PM - 2:00 PM
    • Webinar
    • 119
    Register

    In-situ Remediation of Sulfate Contamination

    Level: Intermediate

    Presenter

    Alex Krichevsky, PhD, MBA

    Director of R&D

    Phoenix Environmental Research


    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 scientists and engineers working on the remediation of coal combustion residuals (CCR) where elevated sulfates in soil and groundwater may be a concern. Those that can benefit from this talk include project managers, hydrogeologists, geochemists, geologists, and engineers.

    Webinar Overview:  Elevated levels of sulfates in soil and groundwater can pose an environmental challenge. Many locations in the world have elevated sulfates concentration as a result of human activity or natural processes, such as presence of certain naturally occurring minerals and soil types. While at high concentrations sulfates are not toxic per se, they can cause unappealing aesthetic effects in drinking water as well as to induce laxative effects in humans and animals. In this work we demonstrate an environmentally friendly technology for remediation of sulfate contamination from soil and groundwater using food-grade organic materials and naturally occurring sulfate reducing bacteria (SRB). Our results demonstrate essential elimination of sulfates from contaminated samples using low molecular weight organic compounds. In one set of experiments, a combination of sodium lactate and sodium acetate caused reduction of >90% in sulfates concentrations in two month, with final recorded concentration being below naturally occurring sulfate levels. In another experiment, we used a combination of ethanol and butanol to treat contaminated soil and groundwater, resulting in sulfate levels reductions >98% within two months. In addition, a highly unexpected observation has been made. While widely accepted view of sulfate remediation suggests that it should decrease the concentration of soluble metal, our results demonstrated a surprising opposite effect where sulfate remediation has lead to increases in soluble metals concentrations. We further demonstrate a successful use of oxidizers to reduce concentrations of these metals to their original background levels.

    About our Presenter:  Dr. Alex Krichevsky is a biotechnology professional, who several years ago refocused his interests in the field of environmental remediation. His professional work has been featured in numerous mainstream media outlets in the United States including Bloomberg Businessweek, NBC News, Discover magazine, the Huffington Post and Slate magazine, as well as in Germany, the United Kingdom, Portugal, and China.

    • September 15, 2022
    • 2:00 PM - 3:00 PM
    • Webinar
    • 150
    Register

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

    Level: Intermediate

    Presenter

    Jeffrey R. Hale, P.G.

    Emerging Contaminants Practice Leader

    Woodard & Curran 

    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:  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 more stringent than U.S. EPA’s health advisory level (HAL) of 70 ng/L for PFOS and PFOA, individually or combined. However, these criteria are slightly less stringent than those promulgated by some other states, such as Michigan, New Hampshire, and New Jersey.

    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 the Emerging Contaminants Practice Leader at Woodard & Curran. 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.

     

     

     

    • September 30, 2023
    • See order form
    Register
    To order a replacement certificate for a previously attended PCPG event, please complete the order form and remit payment.

    Replacement will occur only if attendee initialed the sign-in/sign-out sheet.

    During busy periods, certificate replacement may take 7-10 days.

    Questions? Contact Rose Jeffries by phoning (717) 730-9745.





 

Copyright 2021

All Rights Reserved

Pennsylvania Council of Professional Geologists
116 Forest Drive

Camp Hill, Pennsylvania 17011

(717) 730-9745