2020-03-31_HYDROLOGY - M1977300 - Laserfiche WebLink

Home Browse Search

COLORADO LEGACY LAND TABLE 1B: SUMMARY OF SURFACE WATER ANALYTICAL DATA Surface Water Quality Standards Sample Location Segment 17b,Ralston Creek Parameter Units (CDPHE 2019)1 SW-ARH SW-BPL SW-FBRG SW-LLHG SW-Weir Acute Chronic 11/4/2019 10/16/2019 11/4/2019 11/4/2019 11/4/2019 Iron mg/L - 1 0.06 0.03 0.09 0.06 0.16 Lead mg/L 0.05 - <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 Manganese mg/L 0.05 - <0.01 <0.01 <0.01 <0.01 0.06 Mercury mg/L 3.513 1.941 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002 Molybdenum mg/L - 0.15 <0.02 <0.02 <0.02 <0.02 <0.02 Silver mg/L 0.0047 0.00017 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 Thallium mg/L - - <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 Uranium mg/L - - 0.0190 0.0244 0.0142 0.0201 0.0219 Zinc m /L 0.249 0.188 <0.01 <0.01 <0.01 <0.01 <0.01 .,.,., ,. .. ,. ,. . uro;.. e ,. „ 3 ., . , _s, >.....:..,.,,-, , � i z ti � a , .w �� /� „ ,.,, . , ' ,� �� e p� ,��6bror , eLa � f " i.ur . � /�L�� Gross Alpha pCi/L - - 9.8 14.0 11.0 17.0 16.0 Gross Beta pCi/L - - 8.1 8.5 11.0 8.8 6.8 Radium 226- Dissolved pCi/L - - 0.43 0.46 0.42 0.45 0.33 Radium 226-Total pCi/L - - 0.7 0.24 0.62 0.63 0.57 Radium 228-Total pCi/L - - 1.4 -0.132 1.6 2.5 2.4 Radium 226+ Radium 228-Total pCi/L - - 0.7 0.2 0.6 3.1 3.0 Notes: 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. 2Negative values are shown as less than lower limit of detection Bold and grey-shaded analytical results are greater than one or more criteria. NO3=Nitrate NO2=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 PAGE 6OF12