1990 National Water Quality Laboratory Services Catalog

Abstract

Catalog. Please use 1t with your existing binder and dividers. If additional copies are needed, you may request them by EDOC to DENSUPPLY. Reasonable numbers are available at no charge. Several changes will be evident in this catalog. The Method Codes have been added to the WATSTORE Codes, so that you can determine the methodology used for each analysis. The biological parameters have been combined with the organic parameters on Tables 4 and 5, eliminating Tables 4.3 and 5.3. Further modifications to clarify and simplify are anticipated for next year. We would be happy to receive your suggestions for Improvement.

Detailed study of water quality, bottom sediment, and biota associated with irrigation drainage in the Salton Sea area, California, 1988-90

“…Reporting limit (reporting level) The lowest measured concentration of a constituent that can be reliably reported using a given analytical method. Because of unpredictable matrix effects on detection limits, the reporting limit is set somewhat higher than the detection limit (Pritt and Jones, 1989 Results of the study indicate that factors controlling contaminant concentrations in subsurface drainwater in the Imperial Valley are soil characteristics, hydrology, and agricultural practices. Higher contaminant concentrations commonly were associated with clayey soils, which retard the movement of irrigation water and thus increase concentration by evaporation.…”

“…For example, the elimination of contaminant burdens in clams through flushing. Detection limit The minimum concentration of a substance that can be identified, measured, and reported with 99-percent confidence that the analyte concentration is greater than zero (Pritt and Jones, 1989). Reference site As used in this report, a site that is not significantly affected by agricultural drainwater.…”

Geochemistry of the Little Lost River drainage basin, Idaho

“…Samples analyzed by the NWQL were placed in containers and preserved according to laboratory requirements specified by Pritt and Jones (1989). Containers and preservatives, supplied by the NWQL, had undergone a rigorous quality control procedure (Pritt, 1989, p. 75) to minimize potential for sample contamination.…”

Interaction of surface water and ground water in the Dutch Flats area, western Nebraska, 1995-99

“…In the latter part of August and the beginning of September 1998, when more detailed analysis of water was done along transect B-B', alkalinity also was measured. Samples to be analyzed for organic carbon, major ions, nitrogen, dissolved gases, uranium concentrations, radon activities, and uranium activity ratios were collected, preserved, and transported in accordance with the methods described by Pritt and Jones (1990), Wells and others (1990), and others (1995, 1999). Legal description Well registration number1 The sampling schemes were created on the basis of location and depth of wells constructed, the timing of water present in the canals, and perceived gaps in previously collected information.…”