U.S. GEOLOGICAL SURVEY
OPEN-FILE REPORT 2005-1125—Version 2.1
The U.S. Geological Survey and the Idaho Department of Water Resources, in cooperation with the U.S. Department of Energy, sampled water from 14 sites as part of an ongoing study to monitor the water quality of the eastern Snake River Plain aquifer between the southern boundary of the Idaho National Laboratory (INL) and the Burley-Twin Falls-Hagerman area. The State of Idaho, Department of Environmental Quality, Division of INL Oversight and Radiation Control cosampled with the U.S. Geological Survey and the Idaho Department of Water Resources and their analytical results are included in this report. The samples were collected from four domestic wells, two dairy wells, two springs, four irrigation wells, one observation well, and one stock well and analyzed for selected radiochemical and chemical constituents. Two quality-assurance samples, sequential replicates, also were collected and analyzed.
None of the concentrations of radiochemical or organic-chemical constituents exceeded the maximum contaminant levels for drinking water established by the U.S. Environmental Protection Agency. However, the concentration of one inorganic-chemical constituent, nitrate (as nitrogen), in water from site MV-43 was 20 milligrams per liter which exceeded the maximum contaminant level for that constituent. Of the radiochemical and chemical concentrations analyzed for in the replicate-sample pairs, 267 of the 270 pairs (with 95 percent confidence) were statistically equivalent.
Abstract
Introduction
Geohydrologic Setting
Acknowledgments
Methods and Quality Assurance
Site Selection
Sample Containers and Preservatives
Sample Collection
Quality Assurance
Radiochemical Constituents
Tritium
Strontium-90
Gross Alpha-Particle Radioactivity
Gross Beta-Particle Radioactivity
Cesium-137 and Potassium-40
Chemical Constituents
Trace Elements
Major Cations and Dissolved Silica
Nutrients
Purgeable Organic Compounds
Insecticides
Herbicides
Statistical Equivalency of the Replicate Pair of Samples
Summary
References Cited
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