LSPA Continuing Education Online Course

High Viscosity LNAPL Recoverability Assessment 

Registration: Registration must take place during business hours (8 am to 6 pm Mon. - Fri.). Within 24 hours of registration, the LSPA will provide your registration information via email.  
Availability: Once you have your login information, the course may be accessed at any time for 30 days through a web browser. At the end of 30 days, your access is terminated. No extensions will be offered. 
Technology: The course may be accessed using a computer, tablet or mobile device. All you need is a web browser and access to the Internet. Preferred browsers include: Google Chrome, Safari, Edge and Firefox. Please note: Internet Explorer 11 (IE11) is not a supported browser. 
Pricing: Members $75 | Non-Members $225
Credit: 1.0 Technical LSP Credit (#1794); 1.0 NY PE/PG Credit (#20239469) 
Presenter: Stephen S. Boynton, LSP, Subsurface Environmental Solutions (View Instructor Biography)

This course, approved for 1.0 Technical LSP Credit (#1794), is a repeat presentation that was last offered in December 2022. This course was also approved for 1.0 NY PE/PG credit (#20239469). Depending on your LSP renewal date, if you received 1.0 Technical credit then, you may be unable to receive credit for taking this course. Refer to 309 CMR 3.09(2)(c).

Course Description: 

In 2014 the MCP was amended to better reflect the actual behavior of Light Non-Aqueous Phase Liquid (LNAPL) in the subsurface. These changes included the requirement to evaluate LNAPL recovery “if and to the extent feasible.” The subsequent 2016 LNAPL Guidance document (Policy #WSC-16-450) clarified that LNAPL recoverability does not correlate with LNAPL thickness, and it identified LNAPL Transmissivity (Tn) as a key element of the recoverability evaluation.

LNAPL Transmissivity testing has proven to be a valuable approach for evaluating LNAPL recoverability at a majority of LNAPL release Sites. However, high viscosity LNAPLs, (eg. No. 6 oil and some machine oils) can be challenging as these oils can coat instrumentation used to measure LNAPL thickness during the tests. This assessment was designed to determine the viscosity above which typical transmissivity testing equipment (oil/water interface probes and peristaltic pumps) cannot be reliably used.

This effort was partially funded by a 2022 LSPA WES Professional Practice Grant; the presentation will address study findings including:

  • The viscosity above which LNAPL cannot be pumped from a well using common equipment (peristaltic pumps);
  • The performance of field viscosity measurement devices;
  • The viscosity above which LNAPL thickness is not readily measurable; and
  • A proposed equation for calculating a conservative estimate for transmissivity.

Registration Process:
Once you complete your registration form for the course, you will receive three emails from the LSPA:

  1. Your registration confirmation.
  2. A copy of your invoice which acts as a paid receipt.
  3. An email containing your log-in information and link to directly access the online course. Once this email is sent, you will have 30 days to complete the course. Access to the course and the quiz will automatically expire in 30 days. There will be no extensions or exceptions. 

Please note: To receive your CEU, you must successfully complete the quiz and log out of the Learning Management System. All CEU certificates are included in the same PDF. 

If you have any questions, please email Kristi Lefebvre.  

 Please click here to review the LSPA Course Cancellation Policy.