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3. City of Lon7 T.nVe Wgt Dg^ent ’on Bj^ins/Wetlands: <br />The drainage ditch running through the site, drains approxim^ely 613 awes and rans through an <br />existing segmentation basin pnor to discharging to Long Lake. An addition^ 20 ac^ or drainage .s <br />routed to a second existing sedimenution basin prior to dischargmg to Long Lake. TTie project <br />involves enlar^^ and deepening the two existing basins and routing the larger drainage area through <br />both basins pnor m discharge to Long Lake. TTie projea is designed for the pu^ose of improving <br />water aualitv in Long Lake. The design report prepared tor the projea is May 1995 estimates that the <br />phosphorus VemovaJ efficiency of the basins are approximately *0 percent. <br />4. Lon? Lake Alum Treanrenr <br />TTie projea wUl not change the quantity or quality of surface water runoff. <br />19. Water Quality - Wastewaters <br />a. Describe sources, quannries. and composition (except for normal domestic sewage) of all sanUary and <br />industrial wastewaters produced or treated at the site. <br />Not applicable. <br />h. Describe am y«sste matment methods to be used and five estimates t^amposition t^r tre^nt or <br />if the projea involves on-site treatment sy stems, discuss the suitability of the sue condinoru for sue <br />systems. Identify receiving waters (including ground water) andestimme the ! <br />on the quality of the receiving waters. (If the discharge may affea a .ake consult EAW Guidelines <br />about whether nutrient budget analysis is needed.) <br />Not applicable. <br />c. If wastes will be discharged into a sewer system or pretreatment system, identify the system and discuss <br />the ability of the system to accept the volume and composition of the wastes. Identify any <br />improvements which will be necessary. <br />Not applicable. <br />20. Ground Water - Potential for Contanunation <br />a. Approximate depth (in feet) to groundwater: -----minimum^ <br />1. rniintv Road No 6 Wet Detention Basin/Wetland: <br />average. <br />minimum;1 ft. average. <br />2. ppgr Hill Rnad Wet Detention Basin/Wetland: <br />minimum;1 ft. average. <br />3_ ritv of Long Lake Wet Detention Basins/Wetland: <br />minimum;4 ft.average. <br />HtM)! t5>0*-aWVLaneUi»XA W.A£S-0»Page 16 of 24 5/24/95