09-24-2018 Council Packet - Laserfiche WebLink

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PROPOSAL # QN18031601-03 To: City of Orono 2700 Kelley Parkway Orono, MN 55356 Attn: Adam Edwards Re: Water Treatment Plant — Chlorine System Improvements k.,W(r5,T -R Date: May 4, 2018 From: Troy Neurauter Valid: 90 days Page: 1 of 4 Thank you for the opportunity to recommend improvements to the water treatment plants in the City of Orono. We are recommending the installation of new residual chlorine analyzers at each water plant. The presence of chlorine residual in drinking water indicates two important factors. First is that a sufficient amount of chlorine was added initially to the water to inactivate the bacteria and some viruses that cause diarrheal disease. Second is that the water is protected from recontamination during storage and distribution. A significant factor at the both water plant is the location of the chlorine injection point. The results from an analyzer at the plant effluent will provide total chlorine levels and a reasonably good historical trend. A mixer plate could be installed in the water line to increase dispersion which would improve analyzer readings. The locations of the chlorine cylinders for dispensing are within an external structure with independent heating and cooling controls. Due to the nature of the local climate and potential operational difficulties of gas dispensing system in freezing temperatures, we recommend the addition of temperature monitoring to the structure. These new reporting and alarming values will be accessed through the existing SCADA system to provide improved operational awareness of the chlorine dispensing systems. Providing the additional capabilities of control which is an additional project, coupled with searchable historical value database and event notification will increase the overall usefulness and ease of operation for city staff. Why should you select In Control as your Systems Integrator and Partner? In Control is a premier systems integrator and professional services provider serving the water and wastewater industry since 1995. Our highly reputable engineering staff has developed numerous best practices and frequently acts as consultants throughout a project's journey. The relationships earned during projects frequently grow into long term commitments to keep systems up to date with minimal downtime. Our mission is to provide the most cost effective, reliable control system in a professional manner. We keep you in control of expenses through thoughtful consulting, consistent pricing and exceptional service. In Control, Inc. 10350 Jamestown Street NE Phone: (763) 783-9500 Blaine, MN 55449 Fax: (763) 783-9502