2016-01-13_REPORT - C2009087 - Laserfiche WebLink

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Peabody Sage Creek Mining, LLC Page 7 12/14/2015 • Water levels were not reported for well SW19 for this water monitoring year. -Water Quality: • Temperature was not reported for Well COV 1 I from the September, 2014 sampling event. • Temperature was not reported for Well CW23 from the September, 2014 sampling event. Please provide the missing data or explain why the required water level or water quality parameter was not measured or reported. 17. Parameters to be Volume 1, p. 2.04-105 All required parameters were analyzed with the analyzed in ground of CDRMS mining exceptions noted in Item No. 16 above. water samples permit C-2009-087 18. Basic Standards for CWQCC regulations Seven groundwater wells exceeded the pH standard (8.5) Ground Water 41.4 and 41.5 in 2014. The baseline water quality for pH associated with the seven groundwater wells exceeded the 8.5 standard. Seven groundwater wells exceeded the manganese standard (0.2 mg/1) in 2014. As mentioned in the above item number 8 above, in soils with a high pH a standard of 10 mg/1 would be more appropriate than the 0.2 mg/1. In 2014 no PSCM wells displayed a value higher than 8.0 mg/1. Three wells exceeded the fluoride standard (2.0 mg/1). The iron standard was exceeded at alluvial well 71. The baseline conditions for all of the above mentioned wells exceeded the basic standards for groundwater prior to the issuance of C-2009-087. 19. Restoration of CDRMS regulation For the 2014 water year, water levels at all wells fell ground recharge to 4.05.12(3) within their historic ranges with no exceptions. All approximate pre -mining alluvial wells displayed seasonal water level fluctuations rate in response to periods of precipitation recharge. Overburden and coal well water are fluctuating in response to the precipitation recharge, induced ground water flow to the reclaimed mine pits, and in some cases, changes in reservoir water levels.