2021-05-10_HYDROLOGY - M1977300 - Laserfiche WebLink

Home Browse Search

_��COLORADO LEGACY LAND TABLE 2B:SUMMARY OF SURFACE WATER ANALYTICAL DATA Surface Water Quality Standards Sample Location Segment 17b,Ralston Creek Kc. eter Units CDPHE 2019 ' SW-AWD SW-NWRP SW-BPL SW-FBRG SW-ARH SW-LLHG Acute Chronic 01/27/2021 01/27/2021 01/27/2021 01/27/"2021 2021 01/27/2021- r mg/I7 . 11.UZ 13 0.0136 <p.pl <11.01 <U.DI gl.11t <0.01 <U.t11 e 1 Iron m L 1 <0.06 0.278 0.073 B 0.061 B <0.06 <0.06 Lead m L 0.05 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 Manganese m L 0.05 <0.01 0.019 B <0.01 <0.01 0.025 B 4.01 Mercury m L 3.513 1.941 4.0002 <0.0002 4.0002 <0-0002 <0.0002 <0.0002 Molybdenum m L 0.15 0.00034 B 0.00097 0.00227 0.00273 0.00620 0.00729 Silver mx/L 0.0047 0.00017 4.0001 <0.0001 <0.000I <0.0001 4.0001 4.0001 Thallium m L 4.0001 <0.0001 <0.0001 0.0001 <0.0001 <0.0001 Uranium m L 0.0026 0.0078 0.0281 0.0342 0.0451 0.0448 Zinc m L 0.249 0.188 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Gross Alpha Ci L 2.8 4.7 13 20 34 33 Gross Beta i L 5.9 3.9 9.5 7.8 16 13 Radium226-Dissolved i L 0.29 0.30 0.40 0.62 0.67 0.57 Radium 226-Total I pCi/L 1 0.25 0.28 0.35 0.39 0.75 0.71 Radium 228-Total I pCi/L 1 0.37 -0.23 0.37 0.14 0.03 -0.36 Radium 226+Radium 228-Total I pCi/L 0.25 0.28 0.35 0.39 0.75 0.71 Notes: 'Acute and chronic standards for cadmium,chromium Ill,capper,lead,manganese,nickel,silver,uranium and zinc are calculated using an average hardness value of 163 mg/L as CaCO& Bold and grey-shaded analytical results are greater than one or more criteria. B=Estimated concentration NOi=Nitrate NOz=Nitrite CaCO3=Calcium Carbonate mg/L=milligrams per Liter pCi/L=picocuries per Liter Chromium III=Trivalent Chromium Chromium IV=Tetravalent Chromium Source: CDPHE-2019.Regulation No.38 Stream Classification and Water Quality Standards,Clear Creek Basin,Segment 17b.Mainstem of Ralston Creek Including all Tributaries and Wetlands from the Source to the Inlet of Arvada Reservoir.June PATE 9 nF IS