Metro - ECCV Zero Liquid Discharge Pilot Study_Application

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Metro Basin Roundtable July 18, 2007 Mr. Rick Brown Section Chief, Intrastate Water Management & Development Colorado Water Conservation Board 1580 Logan Street, Suite 600 Denver, CO 80203 Dear Mr. Brown: The Metro Basin Roundtable (BRT) has determined that the issue of waste stream discharge from reverse osmosis water treatment is an important issue facing not only the Metro Basin, but many Front Range water providers in the South Platte and Arkansas Basins. In addition, the discharge of waste streams from coal-bed methane wells is an issue of concern throughout the state. Zero liquid discharge of these waste streams will be necessary to meet not only the water supply gap as identified in the Statewide Water Supply Initiative (SWSI), but many of the identified projects and processes that involve the reuse of legally consumable return flows. However, while zero liquid discharge has been used in certain industrial processes, it has never been demonstrated on a significant scale for use by water providers. This study will provide information on the technical feasibility, costs, operational considerations, and energy consumption of several zero liquid discharge processes for the treatment of reverse osmosis water treatment concentrate waste steams. At the July 11, 2007 Metro BRT meeting, the membership voted to recommend funding for the East Cherry Creek Valley Water and Sanitation District (ECCV) Zero Liquid Discharge Pilot Study. The BRT recommended that $200,000 of the project cost be allocated from the Metro Basin Water Supply Reserve Account and $200,000 from the Statewide Water Supply Reserve Account. Since this project is of statewide benefit, the Metro BRT thought that a significant amount of funding should also be provided from the statewide account. The remaining project costs are to be funded by a $55,000 match from ECCV and a $20,000 from the South Metro Water Supply Authority. A summary of the funding request is noted in the table below. ECCV Zero Li uid Oischar e Pilot Stud ECCV Contribution South Metro Water Su I Authorit Contribution Water Su I Reserve Account Metro Basin Allocation Water Su I Reserve Account Statewide Com etitive Account Total Source $55,000 $20,000 $200,000 $200,000 $475,000 The By-Laws of Metro BRT require a simple majority vote of those Members present for any action to be taken by the Roundtable. There was a quorum present at the July meeting and the vote was unanimous in favor of the funding request for the ECCV Zero Liquid Discharge Pilot Study. The application and supporting materials for this project will be provided directly to you by ECCV. If you require additional information, please notify me accordingly. v<. l' / \/V , Page 1 of 2