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February 2914 Page 1 -6 <br />All (sediment ponds and direct discharge points are permitted under NPDES Permits <br />)0906. Sampling stations for this permit are described below. <br />NE- 01 is a grab sample station from the New Elk Mine water discharge V -notch flume <br />located on the Purgatoire River for NPDES Discharge Permit CO- 0000906(Flow meter was <br />installed in 2012). The station monitors the quality and quantity of mine water discharge from <br />the New Elk Mine. During the third quarter of 1989, the mine was sealed and the discharge of <br />mine inflo water was terminated until pumping resumed in December of 2008. <br />able 1 -2. Water Quality Parameter Sample Suites for New Elk Mine <br />Field Measurements NPDES Biomonitorin <br />Flow rate/water <br />level depth <br />Frequency and parameters in accordance with NPDES Permit <br />H (S.U.) <br />Conductivity <br />umhos <br />Temperature <br />Sediment Pond NPDES List <br />Frequency and parameters in accordance with NPDES Permit <br />Short List <br />Sodium Adso <br />ption Ratio (SAR) <br />Total Sus en <br />ed Solids (TSS) (mg/l)Z <br />Sewage Treatment <br />Total Dissolves <br />Solids (TDS) (mg/1) <br />Frequency and parameters in accordance with NPDES Permit <br />Carbonate (m <br />) <br />Bicarbonate (mg/1) <br />Chloride (mg/ <br />NE -080 RS-4 <br />Sulfate (mg/1) <br />Frequency and parameters in accordance with NPDES Permit <br />Manganese ( <br />) (mg/1) total, dissolved <br />Calcium (Ca) <br />(mg/1) <br />Magnesium <br />ft) (mg/1) <br />Potassium (K ) <br />(mg/1) <br />Sodium (Na) <br />mg/1) <br />Iron (Fe) (mg/1) <br />total, dissolved, total recoverable2 <br />Hardness (calculated) <br />' From Table <br />8, New Elk Permit C -1981 -012 <br />2 Surface water <br />only <br />1 -G: NE -001 -G is a site under NPDES Permit No. COG - 310069. This site was <br />used to discharge water from remedial activities at the UST facilities area. NE -001 -G was <br />sampled at its outfall prior to discharging into ditch D -16, which flows into Pond NE007, a site <br />monitored under NPDES CO- 0000906. This site was eliminated during 1999 with reclamation <br />of the reme iation systems and termination of Permit COG - 310069 was approved by CDPHE. <br />NE- 04: A grab sample station of the discharge from the primary spillway of sediment <br />Pond 004. This site predominantly handles stormwater runoff from the New Elk underground <br />development waste pile. <br />