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<br />.'~' <br /> <br />Description of Area: <br /> <br />Virdn Valley Sub.valuation Unit, Arizona, Nevada, Utah <br /> <br />Parameters <br /> <br />ASSESSMENT SHEET <br /> <br />WATER QUALITY LEVELS <br /> <br />Unit <br /> <br />Future Conditions <br />Pl_mll Alternatives <br />Present Future I I <br />Conditions Without 1 2 <br /> <br />Littlefield Stream Gage - Surface Flow (5-year average) <br /> <br />Physical properties <br /> <br />Discharge - Average Annual cfs <br />~ 00. <br />Suspended solids mg/l <br />Water temperature .C <br />Air temperature-July Mean .C <br />Electrical Conductance mmho/cm <br /> <br />Chemical properties <br /> <br />Major catious <br />Ca++ (calcium) <br />Mg++ (magnesium) <br />Na+ (sodium) <br />SAR (sodium absorption <br />ratio) <br /> <br />Maj or an10IlS <br />Cl- (chloride) <br />a <br />504 (sulfate) <br />BCD; (bicarbonate) <br />DO (dissolved oxygen) <br /> <br />Dissolved solids (total) <br /> <br />Nitrogen compounds <br />(nitrate) <br />(ammonia) <br /> <br />Phosphorus <br />(total <br />(ortho) <br /> <br />Coliforms, fecal <br /> <br />BOD (biological oxygen <br />demand) <br /> <br />mg/l <br />mg/l <br />mg/l <br /> <br />no. <br /> <br />mg/l <br />mg/l <br />mg/l <br />mg/l <br /> <br />mg/l <br /> <br />mg/l <br />mg/l <br /> <br />mg/l <br />mg/l <br /> <br />MPN/100ml <br /> <br />mg/l <br /> <br />305 <br />8.0 <br />668 <br />19.5. <br />31.9 <br />3,480 <br /> <br />425 <br />80 <br />115 <br /> <br />2.4 <br /> <br />120 <br />420 <br />100 <br />9 <br /> <br />1,282 <br /> <br />0.34 <br />-0- <br /> <br />0.03 <br />o <br /> <br />100 <br /> <br />1.8 <br /> <br />A-9 <br /> <br />305 <br />8.0 <br />668 <br />19.5 <br />31.9 <br />3,480 <br /> <br />425 <br />80 <br />115 <br /> <br />2.4 <br /> <br />120 <br />420 <br />100 <br />9 <br /> <br />1,281 <br /> <br />0.34 <br />-0- <br /> <br />0.03 <br />o <br /> <br />100 <br /> <br />1.8 <br /> <br />305 <br />8.0 <br />668 <br />19.5 <br />31.9 <br />3,480 <br /> <br />305 <br />8.0 <br />668 <br />19.5 <br />31.9 <br />3,480 <br /> <br />420 <br />75 <br />115 <br /> <br />420 <br />75 <br />115 <br /> <br />2.4 <br /> <br />2.4 <br /> <br />120 <br />410 <br />100 <br />9 <br /> <br />120 <br />410 <br />100 <br />9 <br /> <br />1,261 <br /> <br />1,257 <br /> <br />0.34 <br />-0- <br /> <br />0.34 <br />-0- <br /> <br />0.03 <br />o <br /> <br />0.03 <br />o <br /> <br />100 <br /> <br />100 <br /> <br />1.8 <br /> <br />1.8 <br /> <br />OiJC:>:::O <br />