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<br />• . • <br /> iable 7-9 -Page three <br /> Chemi cal Analysts of Groundwater <br /> From Wolf Creek Coal Ov erburden <br /> Seneca Mine, Routt County , Colorado <br /> / <br /> <br />Weii No. GW-Sll S11 <br />GW GW-S11 GW-S6 GW-S6 GW-56 GW-S6 GM-S6 <br />Aquifer: Wolf Creek Overburden (Sandstone and Shale) <br />Date of Collection 11/9/79 8/7/80 12/5/80 6/16/19 11/9/79 11/9/79 8/8/80 11/13/80 <br />Analyslst USGS Peabody Peabody USGS Peabody USGS Peabody Peabody <br />FIELD PARAMETERS <br />Temperature (°C) 7.0 18.0 7.0 17.5 7,5 7.7 8.5 <br />Conductivity (umhos/cm @ 25o L) 1050.0 1050.0 1230.0 1230.0 1450,0 <br />pH (units) 8.1 8.0 8.0 8.0 <br />LABORATORY PARAMETERSI <br />Acidity (as CaC03)2 -467,0 <br />~ <br />Alkalinity (as CaC03) 640.0 670.0 653.0 1120.0 485.0 460.0 506.0 497,0 <br />Alkalinity, Bicarbonate (as CaC03) 652.0 653.0 485,0 483.0 <br />Alkalinity, Carbonate (as CaC03) 18.0 14.0 <br />Aluminum, Total 0.010 0.5 0.2 0.010 <0,2 0.030 0.7 2.0 <br />f Antimony <0.002 <0.002 <0,002 <0.002 <br />Arsenic 0.001 0.001 0.002 <0,001 0.001 0.001 0.001 <br />Barium 0.2 0.2 0.2 <0.2 <br />Boron 0.110 0.301 0.327 0.050 <0,006 0.050 0.206 0.291 <br />Cadmium <0.001 <0.002 <0.002 0.001 <0.001 <0.002 <br />Calcium 2.5 3.0 5.0 7.8 18,0 5.1 10,0 14.0 <br />~ <br />Chloride 2.6 2.0 2.0 4,0 4.1 4,0 4.0 <br />Chromium <0,02 0.02 <0.04 0,04 <0,02 <0.03 <br />COD 11.5 <br />Conductivity (umhos/cm @ 25o C) 1169.0 1120.0 1100.0 1365.0 1368.0 1350.0 1340.0 <br />Copper 0.002 , <0.02 <0.02 0.002 <0,06 0.000 <0.02 <0.02 <br />Fluoride 2.5 ~ 2.26 2.40 0.8 0.93 0.8 0.90 0.83 <br />Hardness, Total 9.0 10.0 36.0 28.0 25.0 32.0 33.0 <br />Hardness, Non-carbonate 0.0 36.0 0.0 <br />Hydroxide <br />~ <br />Iron, Total <br />I 0.410 1.OB 3.55 0.04 0.4 1,27 2.80 <br />. <br />. Table 7-9 continued on next page. <br />