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RECORD NUMBER: 32 OF 120

Main Title Passive Sampling of Groundwater Monitoring Wells without Purging: Multilevel Well Chemistry and Tracer Disappearance.
Author Powell, R. M. ; Puls, R. W. ;
CORP Author ManTech Environmental Technology, Inc., Ada, OK.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-93/129;
Stock Number PB93-181170
Additional Subjects Ground water ; Water pollution sampling ; Water quality ; Aquifers ; Observation wells ; Tracer techniques ; Water flow ; Environmental transport ; Concentration(Composition) ; Water chemistry ; Colloids ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB93-181170 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 28p
Abstract
It is essential that the sampling techniques utilized in groundwater monitoring provide data that accurately depicts the water quality of the sampled aquifer in the vicinity of the well. Due to the large amount of monitoring activity currently underway in the U.S.A. it is also important that the techniques be efficient. The study examines the differences in water chemistry between the casing and screened interval volumes of four wells at a field site, then compares the results to purged values for the same wells. Tracer experiments, utilizing both colloidal particles and dissolved species as tracers, are presented to illustrate differences in natural flushing between the screened and cased intervals. The data from the tracer removal were then utilized to estimate groundwater flow velocities in the vicinities of the boreholes. The possibility exists that such passive sampling techniques would be useful at many of the sites currently undergoing routine monitoring.