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LSPA December 2022 Membership Meeting: High Viscosity LNAPL Recoverability Assessment
Wednesday, December 14, 2022, 3:45 PM - 5:00 PM EST
Category: Membership Meeting

LSPA December 2022 Membership Meeting

High Viscosity LNAPL Recoverability Assessment 

The LSPA cordially invites you to our December 2022 Membership Meeting on Wednesday, December 14, 2022, which will be held virtually from 3:45 PM to 5:00 PM using the Zoom Webinar platform. This presentation was approved by the LSP Board of Registration for 1.0 Technical LSP Credit. 

When: Wednesday, December 14, 2022
Time: 3:45 PM - 5:00 PM EST (Please note: registration closes 15 minutes prior to the start of the webinar.) 
Live Webinar via Zoom
Important Registration Note: Registration for LSPA webinars requires a two-step process. 1) Complete the LSPA registration, and 2) In your LSPA confirmation email, you will receive a link to a Zoom "Webinar Registration". You must also complete this registration in order to receive the webinar link, and reminder emails with course materials.  
Price:  Credit: $50 Members | $110 Non-Members
             No Credit: $0 Members | $25 Non-Members
Presenter: Stephen S. Boynton, LSP, Subsurface Environmental Solutions (View Instructor Biography)

To ensure you receive continuing education credit for your attendance in this webinar, please read the LSPA's guidelines here.

Program 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.
3:45 PM Welcome and Announcements  
3:55 PM Speaker Introduction
4:00 PM Presentation Begins
5:00 PM Program Ends 

Looking for Meeting Sponsors!
If you are interested in becoming a meeting sponsor, click here for more information on the various sponsorship options.