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<br />~ SELENIUM <br />G'? <br />C\l <br />~ <br /> <br />1. Question <br /> <br />Is excessive selenium a water-quality problem? <br /> <br />Answer <br /> <br />- Selenium is reported as "0" in the USGS water-quality <br />records from project streams, The records are for samples <br />collected April through August, 1975, Records from USGS <br />Lily gaging station show 22 samples taken with only 2 <br />showing measurable amounts of selenium, 0,011 and 0,006 <br />mg/l, The recommended limit for selenium is 0,01 mg/l, <br /> <br />2, Question - Is excessive selenium a soils problem? <br /> <br />Answer <br /> <br />The Bureau studies have shown selenium is not expected <br />to be a problem in the project area, <br /> <br />The Bureau contracted in 1965 for a study by Dr, 0, A, <br />Beath, selenium authority from the University of Wyoming, <br />His report stated none of the usual selenium indicator <br />plants were found, but those soils derived from the <br />Browns Park Formation might possibly carry selenium even <br />in the absence of indicator plants. Recent (1976) Bureau <br />studies of 30 soil samples from 10 different locations in <br />the project area showed 6 samples with soluble selenium, <br />ranging from 0,002 mg/kg to 0,033 mg/kg!/ Concentrations <br />less than 0,1 mg/kg are considered low.- <br /> <br />l/ Fine, L. O. Methods of Soil Analysis. American Society of <br />Agronomy, 1965, <br />