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COLORADO LEGACY LAND <br /> TABLE 1B:SUMMARY OF SURFACE WATER ANALYTICAL DATA <br /> Surface Water Quality Standards Sample Location <br /> Segment 17b,Ralston Creek <br /> Parameter Units CDPHE 2018 SW-ARH SW-AWD SW-BPL SW-FBRG SW-LLHG SW-NWRP SW-Weir <br /> Acute Chronic 8/8/2019 8/7/2019 8/8/2019 8/8/2019 8/8/2019 8/8/2019 8/9/2019 <br /> Manganese -Total m L 1 0.05 N/A 0.02 <0.01 0.03 <0.01 0.02 0.05 0.04 <br /> Mercury-Total m L 3.513 1.941 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <br /> Molybdenum-Total m L N/A 0.15 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <br /> Silver-Total m L N/A 0.15 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <br /> Thallium-Total m L 0.0047 0.00017 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <br /> Uranium-Total mg/L USEPA MCL=0.030 USEPA MCL=0.030 0.0168 0.0012 0.0132 0.0137 0.0169 0.0069 0.0128 <br /> Zinc-Total m L 0.249 1 0.188 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <br /> Radionuclides <br /> Gross Alpha Ci L N/A N/A 9.00 <5.71 8.00 7.50 12.00 5.90 4.40 <br /> Gross Beta Ci L N/A N/A 4.3 2.4 6.7 6.8 5.4 4.4 2.4 <br /> Radium 226- Dissolved Ci L N/A N/A 0.5 0.27 0.61 0.58 0.45 0.34 0.51 <br /> Radium 226-Total Ci L N/A N/A 0.49 0.35 0.54 0.39 0.57 0.28 0.81 <br /> Radium 228-Total Ci L N/A N/A <1.21 11.3 0.27 1 5.3 <1.11 0.16 1.1 <br /> Radium 226+ Radium 228-Total Ci L N/A N/A 0.5 1.7 0.5 5.7 0.6 0.3 1.9 <br /> Notes: <br /> 'Negative values are shown as less than lower limit of detection <br /> Bold and grey-shaded analytical results are greater than one or more criteria. <br /> NO3=Nitrate <br /> NO2=Nitrite <br /> CaCO3=Calcium Carbonate <br /> mg/L=milligrams per Liter <br /> pCi/L=picocuries per Liter <br /> Cr31=Trivalent Chromium <br /> N/A=Standard not Defined <br /> USEPA=United States Environmental Protection Agency <br /> MCL=Maximum Contaminant Level <br /> Source:June 2018 CDPHE WQC 5-CCR-1002-38 Segment 17b Standards <br /> PAGE 6OF12 <br />