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Page 4 of 5 <br />16. Sampling frequency of <br />Tab 15, Table 15 -8 of <br />Ground water samples are collected from YSAL1, YSAL3, <br />ground water monitoring <br />CDRMS mining permit C- <br />YAAL14, YGAL16, YOV30, YW30 YWU30, YWC33, YWCU33, <br />wells <br />1992 -084 <br />YTM32, and SGAL70 and SFAL72 on an annual basis. <br />17. Parameters to be <br />Volume 14, p. 2.04.7 -2 <br />Parameters to be sampled are conductivity (umhos /cm), pH <br />analyzed in ground water <br />of CDRMS mining permit <br />(units), temperature (C), dissolved iron (mg /1), dissolved <br />samples <br />C- 1980 -005 <br />manganese (mg /1), dissolved fluoride (mg /1), dissolved nitrate <br />(mg /1), dissolved nitrite (mg /1), dissolved selenium (ug /1), <br />dissolved sulfate (mg /1), total suspended solids (mg /1), and <br />total dissolved solids (mg /1). All parameters were met. <br />18. Basic Standards for <br />CWQCC regulations 41.4 <br />The Yoast Mine did not generate significant amount of <br />Ground Water <br />and 41.5 <br />Ieachates in 2012. One groundwater well exceeded the <br />manganese standard (0.2 mg /1) in 2012. As mentioned in the <br />above item number 8 above, in soils with a high pH a <br />standard of 10 mg /I would be more appropriate than the .2 <br />mg /1. In 2012 neither of the Seneca II wells displayed a value <br />higher than 0.47 mg /1. <br />19. Restoration of ground <br />CDRMS regulation <br />For the 2012 water year, water levels at all wells fell within <br />water recharge to <br />4.05.12(3) <br />their historic ranges. All alluvial wells displayed seasonal <br />approximate pre- mining rate <br />water level fluctuations in response to periods of <br />precipitation recharge. <br />20. Prevention of adverse <br />CDRMS regulation <br />Compliance with the Basic Standards for ground water, as in <br />impacts to ground water <br />4.05.11(1) <br />item 10, indicates the permittee is preventing adverse <br />systems outside permit area <br />impacts to ground water quality outside the permit area. <br />Monitoring data indicate the permittee is preventing impacts <br />to water quantity outside the permit area. Hydrology reports <br />indicate that a water level at all wells fell within their historic <br />ranges. All alluvial wells showed seasonal water level <br />fluctuations in response to periods of precipitation or lack <br />thereof. Overburden and coal well water levels are <br />fluctuating in response to the precipitation recharge and <br />ground water flow from the reclaimed mine pits. <br />21. Prevention of impacts to <br />CDRMS regulation <br />No material damage has occurred, as discussed in item 20, <br />ground water that adversely <br />4.05.11(2) <br />above. <br />impact post- mining land use <br />22. Minimize disturbance to <br />CDRMS regulation <br />The disturbance to the hydrologic balance within and <br />hydrologic balance within <br />4.05.1(1) <br />adjacent to the permit area caused by mining and <br />and adjacent to the permit <br />reclamation at the Yoast Mine is the minimum that can be <br />area <br />expected from a reclaimed surface mine at this location. Use <br />of best management practices indicates minimization of <br />disturbance to the hydrologic balance. <br />23. Prevention of material <br />CDRMS regulation <br />Surface water— Predicted TDS values were exceeded at 5 of <br />damage to the hydrologic <br />4.05.1(1) <br />the 7 sites. A prediction was made as to the increase in TDS <br />balance outside the permit <br />would be observed at various stream sites during the <br />area <br />irrigation season (June- September). Average TDS at all four <br />sites was lower than predicted for the 2012 water year. <br />