R98-71 APPROVING DECATUR PUBLIC WATER SUPPLY NITRATE MANAGEMENT PLAN

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DECATUR PUBLIC WATER SUPPLY NITRATE MANAGEMENT PLAN JUNE, 1998 Assuming that the severe nitrate eacursion condition is acceptable to IEPA: 1. Subject to increased cooperation, leadership and funding from other interested watershed II parties, implement expanded watershed management nitrate reduction efforts($1.4 million I total present worth). 2. Complete DeWitt County and Cisco Well Fields Capacity Study. o If Capacity Study is favorable, conduct a detailed feasibility and alignment study for the DeWitt County well field pipeline. o If feasibility and alignment study is favorable, then construct the DeWitt County well field pipeline to North Water Treatment Plant ($14.9 million total present worth). o If capacity or feasibility and alignment study is not favorable (and ADM does not operate the North Water Treatment Plant), install ion exchange equipment at North Water Treatment Plant ($3.5 million to $5.3 million total present worth, depending on watershed management effectiveness). 3. Conduct Vulcan gravel pit storage water quantity and quality study. o If study is favorable, install blending equipment at South Water Treatment Plant ($445,000 to $4.2 million total present worth, depending on watershed management effectiveness). o If study is not favorable, install ion exchange equipment at South Water Treatment Plant ($5.1 million to $7.2 million total present worth, depending on watershed management effectiveness).