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MAY. 04 '2004 14:33 651 644 9446 H R GREEN CO #6344 P. 002/004 <br /> PP:// <br /> Howard R. Green Company <br /> May 4, 2004 <br /> Re: 821480J <br /> Mr. Bryan Adams <br /> Elk River Municipal Utilities <br /> 13065 Orono Parkway <br /> Elk River, MN 55330 <br /> RE: PROPOSAL FOR ENGINEERING SERVICES <br /> AQUIFER STORAGE AND RECOVERY <br /> Dear Bryan: <br /> We propose to provide analysis and regulatory approval assistance for utilizing the aquifer <br /> storage and recovery (ASS) process per the attached scope of services dated March 17, 2004. <br /> This letter serves to provide a brief background of the ASR process and summarizes the work <br /> effort that we have proposed in our Phase 1A Scope of Services, Aquifer Storage and Recovery <br /> Testing Plan and Permitting along with an outline of future work necessary to complete the <br /> analysis and approval process, <br /> Background <br /> ASR is a process of storing filtered water underground for long periods of time for later use. Its <br /> application in Elk River would be to store excess filtered water during fall, winter and spring for <br /> use during summer peak demands. In this way, the existing treatment facilities are utilized <br /> more efficiently year-round, and additional treatment plant construction can be delayed or <br /> eliminated. <br /> ASR has been used in other states for several years. The process Is most common in Florida <br /> and California, where is has been used for over 20 years. There are two installations in Iowa <br /> that have been in use for over 5 years. The process has not yet been used in Minnesota. <br /> Gaining approval for using the ASR process involves several steps and coordination and <br /> approvals from several agencies. The proposal we have provided begins these steps and <br /> agency approvals. ovidd <br /> Our Proposal <br /> The proposal details a preliminary assessment of the ASR process, its suitability for Elk River, <br /> and forming a testing plan to be used to gain regulatory agency approval to begin pilot scale <br /> testing of Well #8. The services we are proposing include: <br /> 1. Perform a brief desktop analysis of the suitability of the ASR process for Elk River <br /> using the Mt. Simon aquifer <br /> a. Analyze geochemistry of aquifer <br /> opeo.15827460J ERMIJ No,13 Valve Sta1ASRVir-05 4 04-Adams-proposal.doc <br /> 2650 University Avenue West • Suite 400N • St. Paul, MN 55114 • 651/644-4389 fax 651/644.9446 toll free 868/368.4389 <br />