The Dual Pumping Technique (DPT) for level determined sampling in open groundwater wells ― application and comparison with the Separation Pumping Technique (SPT) and multilevel wells (MLW) well sampling

摘要

We have carried out a comparison study between DPT, SPT and MLW measurements at a test well in Skrydstrup, Denmark (38 m filter screen in a 44,5 m borehole). Measured dissolved compounds are trichloroethane (TCA) and trichloroethylene (TCE). A simple method to measure the position of the water divide with an uncalibrated impeller flowmeter was applied and results were compared with measurements from a heat pulse flowmeter. Results of the measurements are discussed here.