Laserfiche WebLink
Chapter IV <br /> Water released from settling ponds will not exceed an average monthly total suspended <br /> solids concentration of 30 mg/I nor a daily maximum of 70 mg/I. During wet conditions <br /> this limit is 0.5 mg/I settleable solids. The pond discharges are not required to meet the <br /> effluent limitation where it can be demonstrated to the regulatory authority that the flow <br /> results from a storm are greater than the 10 year/24 hour frequency. <br /> 8. Monitoring and Reporting. <br /> a. General. <br /> Mid-Continent monitors and reports surface and groundwater in compliance with <br /> National Pollutant Discharge Elimination System (NPDES) effluent requirements and the <br /> Colorado River Salinity Standards (CRS), 1973 as the basis for evaluating the effect the <br /> mine operations may have on surface and ground water quality and quantity. <br /> During the preceding permit term, TR-4, approved Aug. 11, 1986, allowed for <br /> modification of the water monitoring program. As approved, samples are taken during <br /> peak flow, in June, and low flow, in October. The hydrograph in Fig. IV-C-1 shows <br /> mean monthly flow. Station No. 2 Sutey-Spring Creek (refuse pile underflow) was <br /> added to the sample list for 1986-1987 to observe any possible changes in the quality <br /> or quantity associated with the expansion of the Sutey refuse pile, including the <br /> extension of the underdrain. <br /> The parameters for analysis of surface water and ground water include: <br /> Field: Lab: <br /> • Flow or water surface level Bicarbonate <br /> Temperature Sulfate <br /> pH Sodium <br /> Conductivity Calcium <br /> Chloride <br /> Magnesium <br /> SAR <br /> IRON <br /> TDS <br /> TSS* <br /> * Surface water only. <br /> Monitoring Sites <br /> Ground Water Surface Water <br /> P-1 No. 6 No. 20, Coal Creek <br /> P-2 No. 9 No. 3, Bear Creek <br /> P-3 No. 11 No. 5, Dutch Creek <br /> P-5 GE-1 No. 1, Disney Creek <br /> P-6 GS-1 No. 3, Sutey Creek & <br /> P-7 GW-1 Sutey Underdrain <br /> P-8 AT-2A <br /> 01 AT-2B <br /> 21 <br />