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vlaDVlVeu Duffus <br />70295 <br />mg/I <br />NA <br />NA <br />Report <br />Monthly <br />Grab <br />Arsenic, Dissolved <br />00978 <br />ugh <br />Report <br />NA <br />Report <br />Monthly <br />Grab <br />Boron, Total <br />01232 <br />mg/I <br />Report <br />NA <br />Report <br />Monthly <br />Grab <br />Cadmium, Dissolved <br />01311 <br />ug /I <br />Report <br />NA <br />Report <br />Monthly <br />Grab <br />Cooper, Dissolved <br />01306 <br />ugh' <br />Report <br />NA <br />Report <br />Monthly <br />Grab <br />Iron, TREC <br />00980 <br />mg/i <br />Report <br />NA <br />Report <br />Monthly <br />Grab <br />Lead, Dissolved <br />01318 <br />ugh! <br />Report <br />NA <br />Report <br />Monthly <br />Grab <br />Mercury, Total (Low Level) <br />71900 <br />ugh( <br />Report <br />NA <br />Report <br />Monthly <br />Grab <br />Zinc,'DIssolved <br />1303 uel <br />Report <br />NA <br />Report . <br />Monthly <br />Grab <br />Colorado Department <br />of Public Health <br />and Environment <br />CERTIFICATION TO DISCHARGE <br />UNDER <br />CDPS GENERAL PERMIT COG603000 <br />SUBTERRANEAN DEWATERING /WELLS OPERATIONS <br />Certification Number: COG603192 <br />This Certification to Discharge specifically authorizes: <br />Peabody Sage Creek Mining LLC <br />to discharge from the facility identified as <br />Peabody Sage Creek Mine <br />to: <br />Grassy Creek <br />Facility Located at: <br />Facility Location Latitude 40.449444, Longitude - 107.146667 (See Figure 1) <br />New well (CCU069WT) cased into old underground coal mine workings. 1-day pump test <br />'Ail discharges must comply with the lawful requirements of federal for draw -down of water level. Expected flow is 1 -25 GPM. <br />drain systems, conveyances, or other watercourses under their jurisdiction. <br />es municipalities, counties; drainage districts and other local agencies regarding any discharges to storm <br />36600 Routt County Road 27,Routt County, Hayden, CO 81639 <br />Discharge Number 001 -A <br />External Outfall <br />Permit Limitations and Monitoring Requirements apply as outlined in the Permit for Continuous Discharges (i.e. Subsurface <br />Structure or Foundation Dewatering) <br />Parameter <br />Discharge Limitations <br />Maximum Concentrations <br />Units 30-Day 7- Day.•. - <br />Average . I Average - : I Daily Max. <br />Monitoring <br />Frequency* <br />APPLICABLE TO ALL DISCHARGES AS LISTED IN GENERAL PERMIT <br />pH, (Minimum- Maximum) <br />00400 <br />Total Suspended Solids, <br />00530 <br />Oil and Grease, <br />03582 <br />Flow, <br />50050 <br />Oil and Grease Visual <br />84066 <br />S.U. <br />mg/I <br />mg/1 <br />NA <br />30 <br />NA <br />MGD <br />Report <br />NA <br />NA <br />NA <br />45 <br />NA <br />NA <br />NA <br />SITE SPECIFIC PARAMETERS <br />6.5 -9.0 <br />NA <br />10* <br />Report <br />NA <br />Monthly <br />Monthly <br />Monthly <br />Monthly <br />Monthly <br />Sample Type <br />In -situ <br />Grab <br />Grab ** <br />Instantaneous or <br />Continuous <br />Visual ** <br />• <br />Certification is issued 9/26/2011 <br />e no visibl sheen. If a visual sheen is detected a grab sample must be taken for analysis <br />Effective 09/26/2011 <br />Page 1 of 15 <br />Certification Expires: 12/31/2012 <br />