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COLORADO LEGACY ? AND <br /> TABLE 213:SUMMARY OF SURFACE WATER ANALYTICAL DATA <br /> Surface Water Quality Standards <br /> Sample Location <br /> Segment 17b,Ralston Creek <br /> Parameter Units <br /> (CDPHE 2021)' SW-AWD SW-NWRP SW-BPL SW-ARH SW-LLHG SW-Weir <br /> Acute Chronic 03/02/2022 03/02/2022 03/02/2022 03/02/2022 03/02/2022 03/02/2022 <br /> Thallium mg/L - <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <br /> Uranium mg/L - - 0.002235 0.00508 0,00821 0.0148 0.0167 0.0178 <br /> Zinc mg/L 0.249 0.188 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <br /> Metals-Total <br /> Aluminum mg/L - <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <br /> Antimony mg/L - - <0.0004 <0.0004 <0.0012 <0.0008 <0.0004 <0.002 <br /> Arsenic mg/L - 0.00002 <0.0002 <0.0002 <0.0002 <0.00027 <0.00023 <0.0002 <br /> Boron mg/L - 0.75 0.045 <0.03 <0.03 <0.03 <0.03 0.043 <br /> Chromium III= 0.005 - <br /> Chromium mg/L <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <br /> Chromium VI=0.016 Chromium VI=0.011 <br /> Copper mg/L 0.0213 0.0136 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <br /> Iron mg/L - 1 <0.06 0.175 0.229 0.072 0.078 0.16 <br /> Lead mg/L 0.05 - <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <br /> Manganese mg/L 0.05 - <0.01 <0.01 0.012 0.013 0.018 <br /> Mercury mg/L 3.513 1.941 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <br /> Molybdenum mg/L - 0.15 0.02028 <0.00087 <0.010585 <0.00246 <0.00318 <0.00564 <br /> Silver mg/L 0.0047 0.00017 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <br /> Thallium mg/L - - <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <br /> Uranium mg/L - - 0.002045 0.0044 0.007885 0.0142 0.0157 0.0167 <br /> Zinc mg/L 0.249 0.188 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <br /> Radionuclides <br /> Gross Alpha pCi/L - 3.8 6 14.1 9 13 9.6 <br /> Gross Beta pCi/L - - 3.19 4.6 8.8 6.4 8.8 11 <br /> Radium 226-Dissolved pCi/L - - 0.25 0.1 0.13 0.23 0.24 0.47 <br /> Radium 226-Total pCi/L - - 0.1 0.2 0.28 0.22 0.23 0.32 <br /> Radium 228-Total pCi/L - - -0.29 0.82 -0.51 0.73 -0.13 0.6 <br /> Radium 226+Radium 228-Total pCi/L - - 0 0 0 0 0 0 <br /> Notes: <br /> 1 Acute and chronic standards for cadmium,chromium III,copper,lead,manganese,nickel,silver,uranium,and zinc are calculated using an average hardness value of 163 mg/L as CaCO3. <br /> Bold and grey-shaded analytical results are detected above the criteria. <br /> B=Estimated concentration <br /> NO3=Nitrate <br /> NO2=Nitrite <br /> CaCO3=Calcium Carbonate <br /> mg/L=Milligrams per Liter <br /> pCi/L=PicoCuries per Liter <br /> PAGE 9 OF 17 <br />