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TDS Ratio .96 TDS Ratio .91 <br /> (gray./calc.) (gray./calc.) <br /> Solids, total dissolved 228 mg/1 Solids, total dissolved 1018 mg/1 642 238 <br /> Iron, total recov. 2.12 mg/1 Iron, total recov. 8.66 mg/1 37.4 0 <br /> #11 Tunnel <br /> 6/8/93 11/4/93 Hist. Max. Hist. Min. <br /> Depth (Ft.) 18 Depth (Ft.) 30 33 17 <br /> Temperature (OF) 54 Temperature (OF) 46 69 33 <br /> pH 8.1 pH 8 9 6.8 <br /> Conductivity 300 Conductivity 450 900 220 <br /> Alkalinity as Ca CO3 182 mg/1 Alkalinity as Ca CO3 224 mg/1 258 90 <br /> Bicarbonate at CaCO3 182 mg/1 Bicarbonate at 224 mg/1 454 90 <br /> CaCO3 <br /> Carbonate as CaCO3 0 mg/1 Carbonate as CaCO3 0 mg/1 24 0 <br /> Calcium, dissolved 15 mg/1 Calcium, dissolved 32 mg/1 121 5 <br /> Chloride 3 mg/1 Chloride 3 mg/1 12 1 <br /> Magnesium, dissolved 8 mg/1 Magnesium, 10 mg/1 28 1 <br /> dissolved <br /> Hardness as CaCO3 70 mg/1 Hardness as CaCO3 121 mg/1 <br /> SAR in water 3.46 SAR in water 2.48 6.37 .81 <br /> Sodium, dissolved 66 mg/1 Sodium, dissolved 62 mg/1 65 21 <br /> Sulfate 4 mg11 Sulfate 19 mg/1 109 -2 <br /> Anions (sum) 3.81 meq/1 Anions (sum) 4.96 meq/1 <br /> TDS Ratio 89 TDS Ratio .86 <br /> (gray.Ycalc.) (gray./calc.) <br /> Solids, total dissolved 182 mg/1 Solids, total dissolved 224 mg/1 630 102 <br /> Iron, total recov. 0.82 mg/1 Iron, total recov. 12.3 mg/1 53.3 0 <br /> GS-1' <br /> 12 <br /> 1993 Hydrology Report <br /> Coal Basin <br />