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<br />• <br />TABLE G-4 <br />HLSTORICAL WATER QUALITY ANALYSIS <br />October 3, 1975 <br />NSGS 79-979) <br /> CONCENTR ATION (me[l~ <br />PARAMETER SVC-1 SVC-2 <br /> St. Vrain Creek St. Vrain Creek <br /> at Lyons at E. County Line <br /> at 15°C Rd. at Longmont <br /> at 14°C <br />Silica (Dissolved), SiOZ 4.2 9.6 <br />Calcium (Dissolved), Ca 12 140 <br />Magnesium (Dissolved), Mg 2.0 81 <br />Sodium (Dissolved), Na 2.4 110 <br />Potassium (Dissolved), K 1.0 6.6 <br />Bicarbonate, HCO, 44 367 <br />Alkalinity, CaCO~ 36 301 <br />Sulfate (Dissolved), SO4 6.3 570 <br />Chloride (Dissolved), Cl .9 17 <br />Fluoride (Dissolved), F .1 1.4 <br />Nitrogen, Nitrate (Dissolved), N .O1 .O8 <br />Orthophosphorous (Dissolved), P .00 .Ol <br />Solids Constituents (Dissolved) 51 1120 <br />Hardness, CaCo, 38 680 <br />Hazdness (noncarbonated), CaCO, 2 380 <br />Sodium Adsorption Ratio .2 1.8 <br />Specific Conductance 90 micromhos 1520 micromhos <br />• <br />