Agenda - Environmental Policy Board - 01/18/2017

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Item-by-item guidance Chapter Additional Resources regarding shallow groundwater: • Site-Specific Well logs • DNR's observation well network: hiip://www.dnr.state.mn.us/waters/groundwater section/obwell/locations.html • Lake Level information: htip://www.dnr.state.mn.us/climate/waterlevels/lakes/index.html • MPCA groundwater web page: hUp://www.pca.state.mn.us/Oa xg 947 b. Effects of Project Activities and Mitigation The purpose of sub-Item I l.b. is to identify and discuss potential environmental effects on surface water and groundwater features identified in Item I l.a and mitigation of those effects. i. Wastewater For any project that generates wastewater,details of the sources,composition and amounts of these wastewater streams must be provided in the EAW.For normal domestic sewage generation such as toilet wastes or wash water from human occupancy,only the amounts need be given,calculated from the number of occupants at a rate of 100 gallons per person per day unless another figure is justified. For industrial processes,the sources of all wastewater streams should be identified and a description should be given of how the various potential pollutants enter the stream or are generated within the stream. The anticipated chemical analysis of the various waste streams should be estimated, and the basis for the estimate should be indicated, such as measurements made at an existing similar plant. Provide sufficient information about the nature of any proposed wastewater treatment system to demonstrate that it will be adequate to treat the wastewaters generated. The level of detail needed will depend on the nature of the wastewaters generated and the proposed system and the degree of treatment that must be achieved;where wastewaters or proposed treatment methods are non-routine,a higher level of detail demonstrating that the system will work will be necessary.For industrial wastewaters,it is advisable to consult with MPCA early in the EAW preparation process. 1) If wastewaters will be treated by an existing publicly owned treatment system,this response should address the adequacy of that system to handle the volume and composition of wastewaters from the project. Information about the system characteristics,existing loads and present treatment performance should be given.Anticipated improvements to handle the new wastes,including their scheduling, should be discussed.Any pretreatment of the wastewater before it is discharged into the public system should be discussed under this section,including the nature of the pre-treatment and the wastewater composition and quantity after pre-treatment.Any sludges or other materials removed from the wastewater during pre- treatment must be discussed under the appropriate sections of EAW Item 12. 2)Where the method proposed is on-site sewage treatment systems such as septic tanks and drainfields or similar soil absorption facilities,this response must address the suitability of the site conditions for the use of such systems, and should be focused on demonstrating that the systems will function adequately. Where there will be on-site systems on separate lots,the discussion should demonstrate that each system can be reasonably expected to function.Where site conditions require special methods to allow on-site systems to work properly,the proposed methods should be discussed,including information about how they will be employed. Note any local restrictions or prohibitions of certain types of on-site treatments systems, and any project details which accommodate these local restrictions. Environmental Quality Board EAW Guidelines—October 2013 25