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Abbreviations <br />gpm = gallons per minute <br />cfs = cubic feet per second <br />mg/L = milligrams per liter <br />pCi/L = picoCuries per liter <br />SU = standard units <br />pmhos/c = micromhos per centimeter <br />TSS = total suspended solids <br />TDS = total dissolved solids <br />Hard = Hardness <br />Alk = Alkalinity, total as CaCO3 <br />dis - dissolved <br />tot = total <br />EFRC = Energy Fuels Resources Corporation <br />BLM = U.S. Bureau of Land Management <br />EPA = U.S. Environmental Protection Agency <br />Umetco = Umetco Minerals Corporation <br />Cotter = Cotter Corporation <br />WWE = Wright Water Engineers, Inc. <br />Peel = Peel Environmental Services <br />BC = Burro Canyon <br />UBB = Upper Brushy Basin <br />MBB = Middle Brushy Basin <br />LBB = Lower Brushy Basin <br />USW - Upper Salt Wash <br />Notes: <br />(a) The gross alpha activity standard excludes alpha activity due to radon and uranium. The majority of <br />the gross alpha count in these samples is attributable to uranium and radon. <br />(b) The gross beta standard is 4 millirems per year and is based on the sum of beta emitters present <br />and a risk-based analysis with 2-liters per day drinking water intake. <br />(c) The standard of 5 pCi/L is for combined Radium-226 and Radium-228. <br />(d) Uranium levels in the Lower Dolores River Basin cannot be increased above 30 ug/L or background, <br />whichever is greater. <br />(e) Numeric table values for Segment 3a of the Lower Dolores River water quality standards. <br />(f) Stream standards are in total concentrations unless indicated otherwise. <br />(g) The Colorado Water Quality Control Commission has calculated a health-based standard of 0.02 <br />ug/L for arsenic. <br />(h) The EPA Standards are from Subpart C - uranium, radium, and vanadium ores subcategory of Title <br />40, Part 440 of the Code of Federal Regulations. <br />(i) The analytical data includes results for both total and dissolved concentrations. The data has not <br />been differentiated because the water contains very low levels of suspended solids and the dissolved <br />and total concentrations are typically within 10% of each other. <br />Shading of a constituent concentration or activity level indicates that the value exceeds one or more <br />water quality standards. These standards may not be applicable to the water source and use; however, <br />they do provide a means for assessing whether a value is higher than the norm. <br />"<° indicates not detected at the analyte reporting limit shown <br />Uranium values are presented in both mg/L and pCi/L. The units mg/L are converted to pCi/L by <br />multiplying by 670 pCi/mg.