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TABLE 783-15 . 4 <br /> GROUND WATER QUALITY DATA, COAL CREEK ALLUVIUM <br /> Well location : SC010089I1CC3 <br /> Geologic unit : alluviam <br /> Date of sample : 4/25175 <br /> Dissolved silica (S10',) mg;l 5 . 9 <br /> Dissolved iror. (Fe) mg/I 340* <br /> Dissolved manganese (`fr.) mg/1 140 <br /> Dissolved calcium (Ca) mg/l 59 <br /> Dissolved magnesium ('M-) mg/l 20- <br /> Dissolved sodium (Na) mg/1 37 <br /> Dissol-ied potassium (k) mg/1 <br /> Bicarbonate (:iCO3) M. 309 <br /> Alkalinity as CaCO3 mg/I 253 <br /> Dissolved sulfate (SO4) mg/1 66 <br /> Dissolved chloride (Cl) ng/1 4 . 1 <br /> Dissolved flucride (F) mg/l . 2 <br /> Dissolved nitrite plus nitrate (N) mg/ I . 05 <br /> Dissol-ved orthophosphate (?04) mg/l . 09 <br /> Dissolved solids (s,,:m, of const_tuents) n7/l 347 <br /> Hardness (Ca,Mg) mg/l 230 <br /> Sodium adsorption ratio i . 1 <br /> Spec_=,c conductance mlicrctihcs 550 <br /> pH units 7 . 6 <br /> 0 Temperart�re IC70 <br /> Dissolved arsenic (ns) mg/I 0 <br /> C ► Dissolved selenium (Se) mg/1 0 <br /> -These levels of iron and magnesium are unusually high <br /> and are believed to be in error . No such levels were identified <br /> in water samples tested in 1980 and 1981 . <br />