• Solar Decathlon Latin America and Caribbean
    June 14, 2018
    My name is Jhonatan Escobar and I joined O’Reilly, Talbot & Okun Associates, Inc. (OTO) after obtaining my BS in Civil Engineering in 2017.  Working as a full time field engineer represents a lifetime …
  • The New England Trail: Hike 50 Challenge
    May 31, 2018
    New England Trail: Hike 50 Challenge As an avid hiker and lover of the outdoors, I often head to the breathtaking White Mountains of New Hampshire, Vermont’s Green Mountains, and the Adirondacks of Ne …
  • Manifest Destiny –
    May 17, 2018
    Tom Speight, CHMM, and Paul Tanner, PG, LEP For a one-page document, EPA’s humble Form 8700-22, commonly known as the Uniform Hazardous Waste Manifest, carries a lot of very important information, is …
  • Preloading of Varved Clay Soils
    May 3, 2018
    This part of our ongoing series about building settlement and geotechnical engineering strategies to mitigate settlement. Mike Talbot is OTO’s geotechnical engineering practice lead. I recently had th …
  • Vapor Intrusion as a Major Cleanup Driver
    April 19, 2018
    Vapor Intrusion Emerges as a Major Cleanup Driver When I started work as an environmental professional in 1986, I do not recall thinking about or even being aware of the risks posed by vapor intrusion …
  • Settlement of Structures Part 2 – “The Fix”
    April 2, 2018
    In Part I of this topic, we discussed the assessment and the identification of the cause of settlement of existing structures.  Once the causes have been identified, we can then provide alternatives t …
  • What is Connecticut Valley Varved Clay?
    March 20, 2018
    Large areas of the Connecticut River Valley are underlain by a type of soft soil deposit known as Connecticut Valley Varved Clay (CVVC).  This deposit formed at the bottom of a large glacial lake, com …
  • New Book! – Manufactured Gas Plant Remediation: A Case Study
    March 16, 2018
    Well, it’s done.   I’m proud and distinctly relieved to announce the publication of my book, Manufactured Gas Plant Remediation: A Case Study (2018, CRC Press).  Like any proud parent, I can’t fight t …
  • PCB Regulations: Why the 50 ppm cut-off?
    February 15, 2018
    The other day I got an email asking a good, basic question about the federal PCB regulations: “Where did the 50 ppm regulatory cut-off for PCBs come from?”  Is it a science based number? Or did the 50 …
  • Geotechnical Engineering Series: Building Settlement issues in Western New England
    January 9, 2018
      The OTO geotechnical group will feature a series of blogs discussing soil settlement concerns and mitigation.  Topics will include forensic studies and remediation alternatives for existing building …