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6/7/2016 State.co.us Executive Branch Mail - Re: Chemical Addition and Discharge Permit <br />Any need for Twentymile to revise their CDPS discharge permit regarding the use of the floc will be <br />between WQCD and the company. We won't need proof that the company has complied with WQCD's <br />requirements for us to approve this MR application. The MR application submitted to us is basically to <br />update the section of their DRMS permit pertaining to their operations, to indicate the use of the <br />flocculant. <br />Us not needing WQCD approval to approve this MR is similar to a company submitting to us a request to <br />build a sediment pond: while the company will eventually need to obtain WQCD approval for a CDPS <br />outfall for the pond prior to using the pond, the company not having WQCD's approval for the CDPS <br />permit for the outfall doesn't stop us from approving the designs for that pond. <br />If you have any questions, Erin, feel free to contact me. My phone is 303-866-3567 ext 8126. <br />On Thu, Jun 2, 2016 at 4:40 PM, Scott - CDPHE, Erin <erin.scott@state.co.us> wrote: <br />Hey Dan, <br />Thanks for the heads up on twentymile and the flocculant addition. Yes, chemical addition to any water <br />which may be discharged (changes in discharge) should be submitted to the division on a <br />permit modification request form. They can contact us for further instruction if needed. The description <br />of the chemical and amounts to be used should be included in the request along with MSDS for the <br />proposed chemical to be used. Once the form is received it will be assigned to a permit writer to review <br />the proposed changes in operation to determine if any changes to the terms and conditions of your permit <br />are needed. If changes are needed we prepare a draft of those changes for review. If changes are not <br />needed we will notify the permittee of such via a memo and the status of the modification request can be <br />closed. <br />The mod form is on line under "permit forms" and as a link under significant change in discharge <br />notification. <br />Thanks and let me know if I can assist further. <br />Erin <br />Erin Scott <br />Unit Manager <br />Permits Unit 3 <br />AXI. COLORADO <br />JOA1Water Quality Control Division <br />" Department of Public Health & Environment <br />P 303-692-3506 1 <br />4300 Cherry Creek Drive South, Denver, CO 80246 <br />erin.scott@state.co.us I www.colorado.gov/cdphe/wqcd <br />24 -hr Environmental Release/Incident Report Line: 1.877.518.5608 <br />Daniel I. Hernandez <br />Senior Environmental Protection Specialist <br />hftps:Hmail.googl e.com/m ai I/u/0/?ui=2&i k=e29129fcb5&view=pt&search=i nbox&th=1552bef6cf6dl e9d&si m l=1552bef6cf6dl e9d 2/3 <br />