ATL is starting our fall PDH seminar schedule this Thursday with the presentation listed below:

  • Thursday, October 12th, 2023 at 2:00PM EDT
    Pyrite and Pyrrhotite in Shale, Fill Material, and Aggregate: A Potential Geotechnical Concern
    Presenter: Chris Kelson, PhD, PG
    This presentation provides an overview of the mineralogy and geological occurrences of pyrite and pyrrhotite and the geochemical and environmental factors that contribute to the deleterious effects sometimes associated with these minerals. (1PDH)
  • Cost: Free
  • Register at:
    Each attendee must register individually to obtain credit.
  • For more information on this topic, click on the following lick to read a short technical paper:
    Expansive Pyritic Shale – A Geotechnical Concern

ATL has provided continuing education seminars for PDH credit for over 15 years, and we are excited to announce that the following seminars have been approved for online presentation. The seminars are intended to provide participants with an understanding of technical topics that will assist with their project needs. ATL courses are recognized by most U.S. states including New York to receive PDH credits for various professional licensure (ATL is a NYS approved sponsor organization).