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Mr. Whitehead <br />Page I 2 <br />February 10, 2016 <br />2. The Operator has indicated that trials have been conducted at the Lyons Plant using powder <br />activated carbon injection and hydrated lime injection. Please indicate what, if any, analyses <br />were performed on the CKD from these trials. Specify the analyses which were performed <br />and provide the results to the Division. <br />3. The Operator has indicated the activated carbon and hydrated lime will be injected directly <br />into the effluent gas streams of the kiln. Will the activated carbon and hydrated lime be <br />bound with the CKD, or will it produce a separate waste stream? Please detail how the <br />addition of carbon and lime will alter the composition of the current CKD waste stream. <br />4. Please provide a detailed description of how the CKD, activated carbon and hydrated lime <br />will be recovered and disposed of in C -Pit. Also, provide a schematic illustration detailing <br />the cement kiln process to accompany the above requested description. <br />5. Please provide a detailed sampling plan for how the CKD will be collected to perform the <br />requested analyses. The sampling plan should address the following: <br />a) Specify number of samples to be collected (samples should include both composite <br />and grab) <br />b) Specify how the samples will be collected <br />c) Specify the sample collection points <br />d) Describe how samples will be collected to account for the variability in operating <br />temperatures of the kiln <br />This concludes the Division's preliminary adequacy review of this Technical Revision. Please <br />remember that the decision date for this Technical Revision is February 22, 2016. As previously <br />mentioned, if you are unable to provide satisfactory responses to any inadequacies prior to this <br />date, it will be your responsibility to request an extension of time to allow for continued <br />review of this Technical Revision. If there are still unresolved issues when the decision date <br />arrives and no extension has been requested, the Technical Revision will be denied. <br />If you have any questions, please contact me at (303)866-3567 x8116. <br />Sincerely, <br />Michael A. Cu Ingham <br />Environmental Protection Specialist <br />CC: Wally Erickson, DRMS <br />