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Review of 2020 Annual Hydrology Report <br /> Mine: New Elk Date of review: October 2021 <br /> Permit No.: C1981012 DRMS reviewer: R.Reilley <br /> Report Years: 2019 and 2020 Submitted by: New Elk Mine <br /> Date received by Division: 28 February 2020 and 24 February 2021 respectively <br /> Requirement Regulation Comment <br /> A. Filing frequency CDRMS <br /> of hydrology regulation Annual Filing. <br /> report 4.05.13(4)(c) <br /> March 15 <br /> according to <br /> B. Timely filing of Sections The 2019 report was filed on 28 February 2020. <br /> hydrology report 4.8.5.1 and The 2020 report was filed on 24 February 2021. <br /> 4.8.5.2 permit <br /> C-81-010 <br /> C. Filing frequency CDRMS <br /> of pond reports regulation Filing frequency was met for both years 2019 and for 2020 <br /> 4.05.9(17) <br /> D. Timely filing of CDRMS Filing of the 2019 reports were received all at once in January of <br /> pond reports regulation 2020. 2020 reports were received monthly and in a timely <br /> 4.05. 9(17) manner. <br /> E. Content of pond CDRMS <br /> regulation Adequate <br /> reports 4.05. 9(17) <br /> F. Filing frequency <br /> of NPDES NPDES permit Filing frequency was met for monthly, semiannual and <br /> Discharge CO-0032115 quarterly requirements in 2019 and 2020. <br /> Monitoring <br /> Reports <br /> G. Timely filing of <br /> Discharge NPDES permit Filing of reports was timely. <br /> Monitoring CO-0032115 <br /> Reports <br /> New Elk monitors 5 drainage systems. None of the ponds <br /> H. NPDES NPDES permit discharged in 2019 or 2020. <br /> discharge CO-0032115 <br /> limitations The Permit CO-0000906 was issued in 2015 and expired in May <br /> of 2020. <br /> I. Sampling Table 4.8-11 of New Elk conducted surface monitoring in accordance with the <br /> frequency at CDRMS approved monitoring plan and frequency for sites PRS 1 and <br /> surface water mining permit pRS 4 in 2019 and 2020. <br /> monitoring sites C-81-010 <br /> Required field parameters for sampling comprise temperature <br /> (°C),flow(gpm),pH(std units),conductivity(µmhos),and <br /> constituent parameters comprise TSS(mg/1),TDS(mg/1),Fe <br /> J. Parameters to be sampled at Table 4.8-12 of (m total Fe (mg/1),total Al(mg/1). <br /> g/1)� <br /> surface water CDRMS Extended parameters requires sampling for As(mg/1),HCO3 <br /> sites mining permit (mg/1),total B(mg/1),dissolved Ca(mg/1),dissolved Cd <br /> C-81-010 (mg/1),Cl(mg/1),total Cr(mg/1),dissolved Cu(mg/1), total <br /> Hg(mg/1),K(mg/1),Mg(mg/1),Mn(mg/1),dissolved Na <br /> (mg/1),dissolved Se(mg/1),dissolved Zn(mg/1). <br /> Page 1 <br />