Main Title |
Metals in Ground Water: Sampling Artifacts and Reproducibility. |
Author |
Puls, R. W. ;
Clark, D. A. ;
Bledsoe, B. ;
Powell, R. M. ;
Paul, C. J. ;
|
CORP Author |
Robert S. Kerr Environmental Research Lab., Ada, OK. ;ManTech Environmental Technology, Inc., Ada, OK. |
Publisher |
c1992 |
Year Published |
1992 |
Report Number |
EPA/600/J-92/307; |
Stock Number |
PB92-227479 |
Additional Subjects |
Metals ;
Ground water ;
Water pollution ;
Sampling ;
Colloids ;
Environmental transport ;
Turbidity ;
Flow rate ;
Water flow ;
Pumping ;
Water wells ;
Dissolved gases ;
Oxygen ;
pH ;
Temperature ;
Filtration ;
Reprints ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB92-227479 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
16p |
Abstract |
Field studies evaluated sampling procedures for determination of aqueous inorganic geochemistry and assessment of contaminant transport by colloidal mobility. Research at three different metal-contaminated sites has shown that 0.45 um filtration has not removed potentially mobile colloids, when samples have been collected using low pumping flow rates (approx. 0.2-0.3 L/min). However, when pumping velocities greatly exceed formation groundwater flow velocities, large differences between filtered and unfiltered samples are observed, and neither are representative of values obtained with the low flow-rate pumped samples. There was a strong inverse correlation between turbidity and representativeness of samples. |