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1 1 1 TA6 LE '<3 SUMMARY OF 'WATER QUALITY DATA 1983 Yampa River Alluv lum Parameter Mean St.Dev. Max. Min. Units No. Period PHYSICAL PROPERTIES Conductivity 4920 3460 8400 1520 umhos/cm 8 3/83-12/93 pH 1.6 0.2 7.9 1.2 -- 8 3/83-:2!93 Alkalinity as CaCC3 424 19 458 400 mg/L B 3/83-:2/83 Hardness as LaC03 905 2510 Sa8 myjl 8 3/83-:2/83 Solids, dissolved 4550 3510 8460 1100 mg/L 9 3/83-12/83 CATIONS, D[SSOLVEO Czlcium 239 173 429 67 mg/L 8 3/83-12/83 Magnesium ~ 114 350 90 mg/L 8 3/83-12/83 Sodium 106 !540 152 mgjL 8 3/83-12/83 Potassium 3.8 2.6 6.4 0.5 mg/L 8 3/83-12/83 ANIONS Bicarbonates as HC03 532 5B 670 488 my/L 8 3/83-22/83 Carbonates as C03 0 0 0 0 mg/L 8 3/83-12/83 Chloride Z~ 267 1'8 48 mg/L d 3/83-12/83 Sulfate ` 25x80 2210 442 5130 mg/L 8 3/83-12/83 PRIMARY DRINKING WAT ER, DISSOLVED Arsenic <2.1 0.4 3 <2 ug/L 8 3/83-12/83 Barium <200 0 <200 <200 ug/L 8 3/83-12/83 Cadmium <8.2 5.4 l9 <5 ug/L 8 3/83-12/83 Chromium <26 1B 10 <20 ug/L 8 3/83-12/83 lead <212 92 210 <20 ug/L 8 3/83-12/83 Mercury <1 0 <L <1 uy/L 8 3;83-12/93 Selenium <3.6 2.8 LO <2 uy/L 8 3;83-12/83 SECONDARY DRINKING WATER, DISSOLVED Copper <30 24 90 <20 ug/L 8 3/83-12/83 Zinc 31 12 50 14 uq/L 8 3/83-12/83 MISC. TRACE METALS, DISSOLVED Aluminum ~ <310 190 700 <200 ug/L 8 3/83-12/83 Boron 290 150 590 120 ug/L 8 3/83-12/83 Molybdenum <200 0 <200 <200 ug/L 8 3/83-12/83 N1cke1 <51 30 90 <20 ug/L 8 3!83-12/83 MINOR CONSTIT. Fluoride 0.57 0.26 0.88 0.25 mg/L 8 3/83-12/83 Iron 2.38 2.83 6.61 0.02 mg/L 8 3/83-12/83 Manganese, dissolveC <0.58 0.60 1.23 <0.02 mg/L 8 3/83-12/93 Sulphide <0.2 0 <0.2 <0.2 mg/L 8 3/83-12/83 NUTRIENTS N itrogen,N03.NOp <0.83 0.82 2.36 <0.02 mg/L 8 3/83-12/83 N itrogen,Ammonium a5 N <0.31 0.28 0.?0 <0.02 mg/L 8 3/83-12/83 Phosphate, ortho as P<0.046 0.051 O. 11 <0.02 mg/! 8 3/83-12/83 ORGANICS Cyanide <0.002 0 <0.002<0.002 mg/L 9 3hB3-12/83 u = micro All parameters total unless o ther.+7se indicated. _ No field data inc luC ed.