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Water quantity and quality will not change due to the project. Water from the Elk River <br /> will be directed away from work areas during construction to safeguard its quality, but it <br /> will continue to pass through the lake. <br /> b. Identify the route(s)and receiving water bodies for runoff from the site. Estimate the impacts of the <br /> runoff an the quality of the receiving waters. (if the runoff may affect a lake consult"EAW Guidelines" <br /> about whether a nutrient budget analysis is needed.) <br /> Lake Orono drains via the Elk River to the Mississippi River, which is approximately one <br /> mile away. A negligible increase in water quality may result from the project due to an <br /> increase in the lake's volume. <br /> 19. Water Quality - Wastewaters <br /> a. Describe sources,quantities,and composition (except for normal domestic sewage)of all sanitary and <br /> industrial wastewaters produced or treated at the site. <br /> N/A <br /> b. Describe any waste treatment methods to be used and give estimates of the composition after <br /> treatment,or if the project involves on-site sewage systems,discuss the suitability of the site conditions for <br /> such systems. Identify receiving waters(including ground water)and estimate the impact of the discharge <br /> on the quality of the receiving waters. (if the discharge may affect a lake consult"EAW Guidelines" about <br /> whether a nutrient budget analysis is needed.) • <br /> N/A <br /> C. If wastes will be discharged into a sewer system or pretreatment system, identify the system and <br /> discuss the ability of the system to accept the volume and composition of the wastes. Identify any <br /> improvements which will be necessary. <br /> N/A <br /> 20. Ground Water- Potential for Contamination <br /> a. Approximate depth(in feet)to ground water: minimum; average. <br /> The minimum and average depth to groundwater at the disposal sites is greater than 6 <br /> feet. The depth to ground water for the lake is hard to ascertain because it is an <br /> impoundment of surface waters. No ground water seepage back into the lake has been <br /> observed during past draw downs so it can be assumed that the natural depth to ground <br /> water is the elevation of the Elk River or lower. <br /> b. Describe any of the following site hazards to ground water and also identify them on the site map: <br /> sinkholes;shallow limestone formations/karst conditions; soils with high infiltration rates; abandoned or <br /> unused wells. Describe measures to avoid or minimize environmental problems due to any of these <br /> hazards. <br /> None of the hazards described are of concern with this project. • <br />