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<br />WHAT is being done? <br /> <br />m <br /> <br />The Gunnison Basin Selenium Task Force is taking a positive approach to address this problem, and <br />working to find answers to 4 questions: <br />1. Where is the selenium coming from, and are there areas where remediation efforts should <br />be focused? To help answer this question, we are: <br />~ reviewing data collected over the last 12 years from the Uncompahgre Project, <br />~ sampling streams in other locations throughout the lower Gunnison Basin, <br />- - - - - - <br />. c ~- " -sampling soilsirf irrlgateda-reas ana-proposing to map high -selenium soils -a-na. <br />~ examining non-agricultural sources of selenium. <br /> <br />. - <br />- - - - - <br /> <br />2. What measures can be used to solve the problem? To help answer this question, we are: <br />~ observing the effects piping irrigation ditches has on selenium in drainage water <br />~ proposing to demonstrate the local use and marketing of crops to remove selenium <br />from soils, <br /> <br />" , <br /> <br />. ......, . <br /> <br />The problem is: <br /> <br />Selenium concentrations above the state standard have been shown to <br /> <br />cause reproduction failure and deformities in fish and aquatic birds. <br /> <br />Locally, it has been shown that deep percolation from irrigation and other sources increases sele- <br />nium concentrations in streams, lakes and wetland areas. Upstream from the major irrigated ar- <br />eas in the Colorado River basin, including the Gunnison and Uncompahgre River basins, selenium <br />concentrations are generally less than 1ppb, but downstream from irrigated areas, often exceed 5 <br />ppb, the state standard. <br /> <br />The Gunnison Basin Selenium Task Force was formed to address this problem and resolve it at <br />the local level. <br /> <br />WHAT IS SELENIUM I WHY IS SELENIUM <br />A PROBLEM? <br /> <br />.," " <br />~,1 ! ',' ': \l <br />