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pH (s.u.) <br />8.42 H <br />9.72 <br />8.44 <br />6.5 -8.5 <br />6.5 - 8.5 <br />Elec. Conductivity (umhos /cm) <br />1,330 <br />1,610 <br />1,620 <br />Dissolved oxygen <br />5.4 H <br />7.25 <br />7.16 <br />ORP <br />NA <br />368 <br />332 <br />Hardness as CaCO <br />810 <br />NA <br />NA <br />Magnesium <br />5.2 <br />NA <br />NA <br />Phosphorus <br /><0.1 <br />NA <br />NA <br />Chloride <br />2 <br /><1. <br /><1. <br />250 <br />Fluoride <br />0.1 <br />0.2 <br />6.9 <br />4 <br />2 <br />4 <br />2.0 <br />Sulfate <br />737 D <br />992 D <br />1,010 D <br />250 <br />Nitrate +Nitrite (as N) <br />0.1 <br />0.2 <br />0.2 <br />10 <br />10 <br />100 <br />TDS <br />1,240 <br />1,540 <br />1,570 <br />500 <br />Alkalinity <br />44 B <br />38 <br />33 <br />Mineral Joe Mine Environmental Protection Plan <br />12 <br />Notes <br />4148B.120927 <br />0.22 Shaded values exceed Federal secondary MCLs (SMCLs) or Colorado Table 2 groundwater standards <br />0.12 Bolded and shaded values exceed Federal MCLs or Colorado Domestic Water Supply Human Health Standards <br />0.12 Bolded and italic values exceed Colorado Groundwater Agricultural Standards <br />(1) World shale average values from Rose et. al,. (1979) Aluminum and thallium values are average crustal abundance <br />(2) CDHPE, 2009. Colorado Department of Public Health And Environment, Water Quality Control Commission, Regulation No 41, The Basic Standards For Ground Water (5CCR1002 -41) <br />(3) All results reported in mg/L unless otherwise noted <br />(4) Lead MCL/MCLG is 0; action level is 0 015 <br />(5) EPA Action Level for gross beta particle activity in drinking water is 50 pCi/L <br />D = Laboratory- assigned flag indicating the reporting limit (RL) was increased due to sample matrix interference. <br />Whetstone Associates • <br />