Low-Flow Purging and Sampling and No-Purge Sampling

Topic: Low-Flow Purging and Sampling and No-Purge Sampling

Traditional ground-water sample collection methods, including well-volume purging and sampling and purging a well to dryness, are subject to significant sources of  bias and error that commonly result in either over- or under-estimation of actual sample concentrations and poor precision and accuracy.  It is thus exceedingly important to use more up-to-date methods, like low-flow purging and sampling and no-purge sampling, that have been demonstrated by many field research studies to produce higher quality samples so all stakeholders can have much higher confidence in sample analytical results.  This series of two modules comprehensively covers the topics of low-flow purging and sampling and the newer methodology referred to as no-purge sampling, and explains why and how low-flow purging and sampling and no-purge sampling always produce dramatically improved and more consistent sampling results and significant cost savings.  Field videos are included within these modules to help explain the practices and procedures required to implement low-flow purging and sampling and no-purge sampling.  While you may opt to take just one of these modules, it is strongly recommended that you take both modules in the prescribed order if you want comprehensive coverage of the subject.

Module GWM–23 (Total Length: 58 Minutes) Price: $159.00 Sign in to Your E-School Account to Register

Practices and Procedures for Low-Flow Purging and Sampling

  • Fundamental Concepts – What it is, How it Works
  • Discussion of ASTM Standard D 6771 on Low-Flow Purging and Sampling
  • Requirements for Equipment and Flow Rates
  • Well Hydraulics During Low-Flow Purging and Sampling
  • Procedures Used and Avoiding Common Errors in the Field
  • Dedicated vs. Portable Equipment Considerations
  • Advantages and Limitations of Low-Flow Purging and Sampling

Total CEUs for Module GWM-23: 1.0 CEU

Module GWM–24 (Total Length: 40 minutes) Price: $159.00  Sign in to Your E-School Account to Register

Practices and Procedures for No-Purge Sampling

  • Fundamental Concepts – What it is, How it Works
  • Understanding the Concept of Equilibrated Grab Samplers
  • Equipment Used for No-Purge Sampling
  • Procedures Used for No-Purge Sampling
  • Advantages and Limitations of No-Purge Sampling

Total CEUs for Module GWM-24: 1.0 CEU