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Cj?go 60 <br />Kaldenbach, Tom <br />01 <br />From: Barbe, Henry [HBarbe@archcoal.com] <br />Sent: Wednesday, December 10, 2008 4:27 PM <br />To: Kaldenbach, Tom <br />Subject: RE: CDPS Permit CO-0038776 Notification of Exceedances <br />Tom: I already screwed-up the percent removal is 58.75 for Outfall 007. The percent removal is calculated by the mean <br />influent concentration minus the mean effluent concentration times 100, divided by the mean effluent. I inadvertently <br />divided the mean effluent by the mean influent and came up with the 41 percent removal which of course is in error. <br />However, the 58.75 % removal by no means, meets the 85% removal required by the regulations. <br />From: Kaldenbach, Tom [mailto:Tom.Kaldenbach@state.co.us] <br />Sent: Wednesday, December 10, 2008 3:49 PM <br />To: Barbe, Henry <br />Subject: RE: CDPS Permit CO-0038776 Notification of Exceedances <br />Thanks Henry-Tom <br />From: Barbe, Henry [mailto:HBarbe@archcoal.com] <br />Sent: Wed 12/10/2008 12:52 PM <br />To: Kaldenbach, Tom <br />Cc: Nolte, Doug; Hansen, Chris; Sweetwood, Ryan <br />Subject: CDPS Permit CO-0038776 Notification of Exceedances <br />Tom: As we discussed in our telephone conversation December 10, 2008, and as required by the rules, MCC is <br />submitting the attached information to notify the Division of exceedances of MCC's CDPS/NPDES Permit No. CO- <br />0038776 for the 4th quarter 2008. The hard-copy will be sent certified return receipt U.S. Mail. <br />Henry A. Barbe <br />Environmental Engineer <br />Mountain Coal Company L.L.C. <br />West Elk Mine <br />P.O. Box 591 <br />Somerset, CO 81434 <br />(970) 929-2238 <br />********** Email Disclaimer ********** <br />The information contained in this e-mail, and in any <br />accompanying documents, may constitute confidential and/or <br />legally privileged information. The information is intended only <br />for use by the designated recipient. If you are not the intended <br />recipient (or responsible for delivery of the message to the <br />intended recipient), you are hereby notified that any dissemination, <br />distribution, copying, or other use of, or taking of any action in <br />reliance on this e-mail is strictly prohibited. If you have received <br />this e-mail communication in error, please notify the sender <br />immediately and delete the message from your system. <br />********** Email Disclaimer ********** <br />The information contained in this e-mail, and in any <br />accompanying documents, may constitute confidential and/or <br />legally privileged information. The information is intended only <br />for use by the designated recipient. If you are not the intended <br />1