2015.11.10 CC and WS Combined - Laserfiche WebLink

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0* Of ,-� � OPMGHTON flit° 01 1� tlol works for you AGENDA SECTION: Consent REPORT DATE: 11/5/2015 MEETING DATE: 11/10/2015 REQUEST FOR CITY COUNCIL CONSIDERATION ITEM DESCRIPTION: CONSIDERATION OF PROFESSIONAL SERVICE AGREEMENT WITH STANTEC AND AUTHORIZATION OF CITY PROJECT 15-13, WTP 3 AND 4 BACKWASH RECLAMATION AND VESSEL 3A REHABILITATION. DEPARTMENT HEAD'S APPROVAL: CITY MANAGER APPROVAL: No comments to supplement this report Comments attached Recommendation: 1. Authorize City Project 15-13, WTP 3 and 4 Backwash Reclamation and Vessel 3A Rehabilitation. 2. Authorize the Community Assets and Development Director to enter into Professional Services Agreement with Stantec to Prepare Plans and Specifications. Legislative History: This work was included in the 2015 Utility Rate Analysis. Explanation: The three iron removal plants were built in the mid 1980's to supply water to the City during negotiations with the Army. These plants and their respective wells draw water out of the deeper Mount Simon / Hinckley aquifer. Well House 8 was also modified and drilled deeper at this time. The City entered into a water remediation agreement with the Army in 1990 and built a separate facility, the PGAC Plant, which has supplied over 95% of the City's water since then. The facilities needing attention supply water during the hot, dry summer months and are capable of supplying all of the city's water if a catastrophic failure should occur at the PGAC Water Treatment Plant (WTP 1). With the discovery of 1,4 Dioxane, New Brighton has pumped water from Mount Simon Hinckley. The increased operation of these wells changes the amount of water that we discharge as backwash from Water Treatment 3 and Water Treatment Plant 4. Backwash Reclamation New Brighton WTP's 3, 4, and 5 are very similar in design and function. One of the key differences between WTP 3 and 4 compared to WTP 5 is that WTP 5 is equipped with a backwash reclamation system. Filters 3 and 3A share a common backwash pit in WTP 3. It is proposed to install a water reclamation system in WTP's 3 & 4. This reclamation system will ultimately save the City money, and not waste as much water to the environment and eliminate the permit requirements for discharge monitoring. Water Treatment Plant 3's filter treatment residuals are discharged after 24 hours detention in an open holding tank. The top clean water is currently discharged to county ditch #2.