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EVALUATION OF SAMPLING AND FIELD FILTRATION METHODS FOR THE ANALYSIS OF TRACE METALS IN GROUND WATER
Citation:
Pohlman, K., G. Icopini, AND C. Rosal. EVALUATION OF SAMPLING AND FIELD FILTRATION METHODS FOR THE ANALYSIS OF TRACE METALS IN GROUND WATER. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-94/119 (NTIS PB94201993), 1994.
Description:
Selected groundwater sampling and filtering methods were evaluated to determine their effects on field parameters and trace metal concentrations in samples collected under several types of field conditions. he study focused on sampling in conventional standpipe monitoring wells under conditions where traditional approaches to sampling may produce turbid samples. owever, filtration may also remove colloidal particles that are known to be mobile under certain groundwater conditions and may be important to the transport of hydrophobic organic contaminants and trace metals. he specific sampling filtration variables investigated in this study were (1) filtration with 0.45 micrometer pore size filters or 5.0 micrometer pore size filters versus no filtration; (2) sampling device, specifically bladder pump, submersible-centrifugal pump, and bailer; and (3) sampling pump discharge rate during purging and sample collection using a low rate 300 mL/min and a moderate rate of 1000 mL/min. hree field sites were visited: an active municipal solid waste landfill in Wisconsin, a closed solid waste landfill in Washington, and a site contaminated by industrial waste in Nevada. hree wells at the Wisconsin and Washington sites and two wells at the Nevada site were included in the evaluation.
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EVALUATION OF SAMPLING AND FIELD FILTRATION METHODS FOR THE ANALYSIS OF TRACE METALS IN GROUND WATER