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'� ' . . <br /> � • <br /> monitoring ha.s been recommended by several federal, state, and county agencies (USEPA, IEPA, <br /> county Soil & Water Conservation Districts (SWCD) and farm bureaus) as well as local <br /> watershed planning committees such as the Lake Decatur Watershed Planning Committee and <br /> Champaign County Soil & Water Conservation District Water Quality Committee. <br /> PROJECT OBJECTIVES <br /> The main goal of this project is to continue to assist the City of Decatur comply with the <br /> Letter of Commitment (LOC) agreed upon with the Illinois Environmental Protection Agency <br /> (IEPA) by continuing to monitor the watershed for nitrates from May 1996 through April 1997. <br /> To accomplish this goal, we outline the following objectives. <br /> 1. Continue to maintain and operate the watershed monitoring network at a <br /> reduced level. Table 1 lists the present monitoring stations and the sampling schedule <br /> proposed. The Illinois State Water Survey will maintain the continuous stream recording <br /> equipment and the data records will be processed to determine continuous stream flows. Nitrate- <br /> N will continue to be sampled at all sites and visited weekly. This reduced sampling schedule <br /> will still allow for the monitoring of nitrates being contributed by the watershed. <br /> Table 1. Monitoring Stations and Sampling Frequency in the Lake Decatur Watershed. <br /> Drainage <br /> Station area Sampling <br /> number Location (sq mi) Frequency* <br /> 101 Long/Big Creek at Twin Bridge Road 46.2 W <br /> 102 Friends Creek at Rte 48 near Argenta 111.9 W <br /> 103 Goose Creek near DeLand 45.1 W <br /> 104 Camp Creek near White Heath 47.2 W <br /> 105 Sangamon River near Mahomet 368.2 W <br /> 106 Big Ditch near Fisher 38�.2 W <br /> 111 Sangamon River at Monticello 543.4 W <br /> 112 Sangamon River at Fisher 245.6 W <br /> * W - weekly sampling visits and collect only nitrate samples <br /> 2. Process and analyze fourth year of data collection. The fourth year of data will be <br /> processed for water discharge (flow), nitrate concentrations, and nitrate loading for all eight <br /> stations in the monitoring network. All four years will be appended and analyzed to determine <br /> any changes in flow and nitrates over time. <br /> 3. Public education. Assist the City of Decatur in public education by presenting the <br /> results of the data collection efforts at public and community meetings throughout the watershed. <br /> 3 <br />