LSP Association Continuing Education Seminar

LNAPL Natural Source Zone Depletion (NSZD) 

When: Wednesday, April 15, 2020  
Time: 11:15 AM - 12:30 PM (Program begins at 11:30am)
Live Webinar on Zoom
Course Instructor: Steven Gaito, NAPL Technical Specialist, AECOM (View Instructor Biography)
 Pricing: Member $50 | Non-Member $110

This course has been submitted for 1.0 Technical Credit. Please be aware that, due to the COVID-19 pandemic, CEU forms are not available at this time.  The LSPA will make every effort to obtain and issue CEU forms from the LSP Board as we receive them. Additional information is explained here.

Course Description:

NSZD is the combination of natural processes that decrease the mass of non-aqueous phase liquid (NAPL) in the subsurface over time. The mechanisms responsible for NAPL depletion include volatilization, dissolution, and biodegradation. The observation of NSZD rates on the order of hundreds to thousands of gallons per acre, per year (Garg et al. 2017) has elevated the role of NSZD in LNAPL conceptual site model (LCSM) development and site management decision making. NSZD measurements are more frequently utilized to achieve a variety of objectives. For the LSP, NSZD can be an additional line of evidence to support a permanent solution. The increased reliance on NSZD data reflects the importance for accurate measurements to support informed management decisions.

This 1-hour webinar will include:

  • Introduction to NSZD 
  • Scientific Basis for NSZD
  • NSZD Implementation, specifically data acquisition and analytical requirements
  • Data Interpretation
  • Regulatory Implications


Please click here to review the LSPA Course Cancellation Policy.