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EXPERIENCE & QUALIFICATIONS Cips <br />"The staff at AE2S are extremely knowledgeable in all aspects of water treatment, storage, and <br />distribution. They coordinate and communicate well with all members of the design and construction <br />team. Throughout design and construction, they provide a thorough review of all options and evaluate <br />multiple scenarios at each point in the process. I am very impressed with their organization and have <br />been pleased with the work they have completed in the City of Fairmont." <br />TROY NEMMERS, PE, Public Works Director <br />tnemmers©fairmont.org <br />507-238-9461 <br />Fairmont, Vinnesota <br />WATER SYSTEM PLANNING AND NEW WTP <br />Facing Multiple Challenges <br />The Fairmont Water Treatment <br />Plant (WTP) was experiencing <br />treatment capacity limitations, as well as <br />challenges related to aging infrastructure, <br />including operational difficulties <br />related to deteriorating and outdated <br />treatment processes. Proposed drinking <br />water regulations would likely require <br />improvements or advanced treatment <br />processes to be implemented in the future <br />at the WTP. <br />To address these challenges, the <br />City retained AE2S to complete a <br />Facility Master Plan, designed to include <br />population and water demand projections, <br />evaluation of current and future drinking <br />water regulations, establishment of <br />treatment target goals, completion of a <br />source water evaluation, a WTP condition <br />assessment and risk analysis, a treatment <br />technology evaluation, and development <br />of preferred project alternatives for <br />evaluation. <br />Confirmation of Recommendations <br />Following completion of the Master <br />Plan, AE2S initiated an onsite pilot <br />treatment operation that was designed <br />specifically to comparatively analyze <br />the Taste and Odor (T&O) mitigation <br />performance of Ultraviolet light (UV) <br />and Hydrogen Peroxide (H202), ozone, <br />and Granular Activated Carbon (GAC). <br />Analysis included "spiking" pilot water <br />with increased concentrations of T&O <br />compounds to evaluate performance <br />under worst case conditions. <br />In addition to analytical evaluation, <br />performance of the alternative <br />technologies was evaluated by an <br />"Odor Panel" consisting of WTP staff, <br />City officials, residents, and engineers. <br />Participation not only assisted in process <br />selection, but also improved public <br />support for the project. <br />Full Speed Ahead <br />The 5.4 million gallon per day <br />(MGD) facility includes the following <br />treatment processes: raw water aeration, <br />conventional lime and soda ash softening, <br />a filter press solids handling process, <br />conventional sand filtration, GAC <br />filtration, onsite generation of sodium <br />hypochlorite for chlorine disinfection, <br />and eight additional chemical feed <br />systems. Interesting project components <br />include demolishing an existing school <br />to make way for the new facility location, <br />rehabilitating and reusing the existing <br />raw water intake station, intermediate <br />pumping station, high service pumping <br />station, and demolishing the existing <br />facility and restoring the adjacent lake <br />shoreline. <br />WHY THIS PROJECT? <br />Educational Gallery Included for <br />Public Tours <br />Taste and Odor Complaint <br />Mitigation <br />Collaborative Workshop <br />Approach <br />AE2S CITY OF RAMSEY DESIGN & CONSTRUCTION - MUNICIPAL WATER SUPPLY TREATMENT PROPOSAL 2.5 <br />