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6/10/2013 14:0914:09 <br />Jones, Dennis D. <br />From: Jones, Dennis D. <br />Sent: Thursday, May 16, 2013 14:39 <br />To: 'Morgan - CDPHE, Kelly' <br />Cc: Cochran, John N. <br />Subject: FW: CO- 0000221 possible iron excursion at outfall 016 <br />May 16, 2013 <br />Kelly Morgan, <br />On May 13, 2013, 1 reviewed recently received lab data for a sample collected on 4/30 at Outfall 016 at the Seneca II -W <br />Mine, CDPS CO- 0000221. The total recoverable iron (TR Fe) value was 3.61 mg /I. This sample was collected as part of <br />our selenium Sampling and Analysis Plan, which included TR Fe as part of the parameter list we committed to. <br />The sample collected on 4/18 at this outfall had a TR Fe value of 0.07 mg /I. We collected this sample for NPDES <br />compliance on that date, as we were unsure (due to weather conditions) as to when we were going to be able to do our <br />selenium program monitoring. <br />The monthly average TR Fe limit in the NPDES permit is 1 mg /I as a monthly average. There is no daily maximum limit. <br />Our monthly average for April is 1.84 mg /I, which is above the limit. However, in December 2010, Peabody Energy was <br />successful in getting an ambient -based seasonal standard for TR Fe (Reg. 33 for the Yampa River, Section 33.47, Segment <br />13d, Dry Creek). That seasonal standard is 3.04 mg /I for the months of March and April. This standard is not in our <br />current NPDES permit, as it is currently under administrative extension. <br />The facility and outfall are being properly operated and maintained. This possible exceedance occurred as a result of <br />spring snowmelt and runoff. In addition, we did get about 2 inches (melted water equivalent) of late, heavy snow in April <br />prior to the sampling event. Therefore, we consider this to be an upset condition. <br />I talked to Kelly Morgan with the WQCD about this on May 13th at 3 PM MDT. PSCM considers these to be our CDPS <br />permit required 24 hour notification. The permit requires that we also submit within 5 days a written report. If this email <br />does NOT fulfill that requirement, please let me know, and I will follow up with a mail letter. <br />Thank you, <br />Dennis Jones <br />Hydrologist - Seneca Coal Co. <br />970- 276 -5209 <br />diones(@peabodyenergy.com <br />Peabodq <br />37796 County Rd. 53 <br />PO Box 670 <br />Hayden, CO 89639 -0670 <br />