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COLORADO LEGACY LAND <br /> $CHWARTZWALDER MINE <br /> -- <br /> TABLE E-5.COMPLIANCE ORDER ON CONSENT,NUMBER IC- 50123-1,MONTHLY SURFACE WATER SAMPLING REQUIREMENTS <br /> Surface Water Quality Standards (CDPHE,2018)A CDPHE Stream Standards,Segment <br /> 17b,Ralston Creek' (CDPHE,2019) <br /> Human Health Aquatic Life Aquatic Life Sample Analytical Detection Sample Suite <br /> Analyte CAS No. Units (Total Concentrations) (Dissolved Concentrations) (Dissolved Concentrations) Tyle Method(s) Limit Name <br /> Domestic Agriculture Water Acute 1- Chronic 30- <br /> Day Acute 1-Day Chronic 30-Day <br /> Water Supply +Fish Day Average <br /> Average <br /> Thallium 7440-28-0 mg/L - Grab M200.8 ICP- Sal>>ple Suite <br /> 0.0005 0.24 - 0.015 MS 0.0001 #2 <br /> Uranium 7440-61-1 mg/L - - Grab M200.8 ICP- 0.0001 Sample Suite <br /> 0.03 4.12 2.57 MS #2 <br /> Zinc, Dissolved 7440-66-6 mg/L 0.25 0.19 Grab Sample Suite <br /> 5 z 7400 0.25 0.19 M200.7ICP 0.01 #2 <br /> Notes: <br /> 'Acute and chronic standards for chromium III/VI,copper,lead,manganese,nickel,selenium,silver,and zinc are calculated using an average hardness value of 163 mg/L as CaCO3 perCDPHE,2019. <br /> 2 Metals standards for aquatic life are stated as disolved unless otherwise specified <br /> µg/L=micrograms per liter <br /> CAS No.=Chemical Abstract Registry Number <br /> CaCO3= Calcium carbonate <br /> CDPHE=Colorado Department of Public Health and Environment <br /> ICP= Inductively Coupled Plasma <br /> ICP-MS= Inductively Coupled Plasma Mass Spectrometry <br /> mg/L= milligrams per liter <br /> N/A= Not applicable <br /> pCi/L=picocuries per liter <br /> WAD=Weak Acid Dissociable <br /> Standard calculated per Reg-31 using an average hardness value of 163 mg/L as CaCO3 <br /> Standard calculated per CDPHE,2019 <br /> Standard provided per CDPHE,2019 u =A ��tffi •- " <br /> Citation: <br /> A=CDPHE,2018.5 CCR 1002,Regulation 31-The Basic Standards and Methodologies for Surface Water, Part 31.11: Radionuclide Standards and Basic Standards for Organic Chemicals,Table II- Inorganic Parameters,and Table III-Metal Parameters, <br /> January. <br /> B=CDPHE. 2019. Regulation 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. <br /> C= CDPHE,2016.5 CCR 1002,Regulation 41-The Basic Standards for Ground Water(Radioactive Materials Standards,Table A Ground Water Organic Chemical Standards,Table 1 Domestic Water Supply-Human Health <br /> Standards,Table 2 Domestic Water Supply-Drinking Water Standards,and Table 4 TDS Water Quality Standards),December.(https://www.colorado.gov/pacific/sites/default/files/41-2016%2812%29.pdo <br /> Note:Whenever CDPHE provided a range of values(i.e.,first number is health-based value,second number is the EPA maximum contaminant level),the value listed In this table is the EPA maximum contaminant level. <br /> JULY 2020 32 AMENDMENT 5 <br />