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Table 1. Regional System Wastewater Treatment Plants <br /> Avg. Current Receiving Liquid Solids <br /> Location <br /> Treatment <br /> Design Flow Water Treatment Processing <br /> Plant Flow (mgd) <br /> (mgd) <br /> Blue Lake 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 0.4 New East Bethel Ground TN, P To Metro <br /> Water <br /> Empire 24 10 Empire Mississippi NH3, P AD, Land <br /> River <br /> Hastings 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 34 24 Eagan Minnesota NH3, P Inc. <br /> River <br /> Total 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 />