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Table 1. Regional System Wastewater Treatment Plants <br />Treatment <br />Plant <br />Avg. Current <br />Design Flow <br />Flow (mgd) <br />(mgd) <br />Location <br />Receiving Liquid Solids <br />Water Treatment Processing <br />Blue Lake <br />32 27 Shakopee Minnesota NH3, P AD, Drying, <br />River Land <br />Eagles Point 10 4.4 Cottage Mississippi NH3, P To Metro <br />Grove River <br />East Bethel <br />0.4 New East Bethel Ground <br />Water <br />TN, P To Metro <br />Empire <br />24 10 Empire Mississippi NH3, P AD, Land <br />River <br />Hastings <br />2.3 1.6 Hastings Mississippi Secondary To Metro <br />River <br />Metropolitan 251 180 St. Paul Mississippi NH3, P Inc./Energy <br />River <br />St. Croix 4.5 3.0 Oak Park St. Croix P To Metro <br />Valley Hts. River <br />Seneca <br />34 24 Eagan Minnesota NH3, P Inc. <br />River <br />Total <br />358 250 <br />Notes: NH3 = ammonia removal <br />P = phosphorus removal <br />TN = total nitrogen removal <br />AD = anaerobic digestion <br />Land = application to agricultural land <br />Inc. = incineration <br />Energy = energy recovery as steam and electricity for in -plant use <br />Secondary = biological treatment to remove organics and suspended solids (used by <br />all plants at a minimum) <br />There are approximately 200 metering stations used to measure wastewater flow from the <br />communities served by the Council. The flow meters are regularly calibrated and maintained to <br />provide accurate measurements of wastewater flow rates and volumes from each community. <br />Wastewater volume is used to allocate the primary wastewater service charges among the <br />communities served. <br />32 <br />