https://www.usgs.gov/publications/well-purging-criteria-sampling-purgeable-organic-compounds
Well-purging criteria for sampling purgeable organic compounds | U.S. Geological Survey
The results indicate that 1) purgeable organic compound concentrations stabilized when three casing volume were purged in only 55% of the cases evaluated in...
https://rubygems.org/gems/purgeable
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