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Page 20 pads, pavements, utilities, and oversize areas and replaced with suitable competed engineered fill, as need, to attain design graded” (Appendix D). The underlying native alluvial soils were determined to be suitable for foundation, pavements, and utility support. “However, the upper portions of the soil strata had a very loose relative density and prior to placing additional fill or foundations we recommended compacting any loose soils and any soils disturbed during the excavation and grading activities” (Appendix D). All low-floor buildings will have the required separation from the water table. Groundwater was encountered in the soil borings while drilling and sampling at depths of about 12.5 feet or deeper below the ground surface. Per the Geotechnical Exploration Report, “we generally do not anticipate that groundwater will be encountered during construction and do not anticipate that dewatering will be required” (Appendix D). Subsequent piezometer readings from February and April 2025 are discussed in Question 12. Approximately 200 acres of soil will be disturbed for project development. Therefore, the National Pollutant Discharge Elimination System/State Disposal System (NPDES/SDS) General Permit will need to be filled with the Minnesota Pollution Control Agency (MPCA) prior to initial earthwork. The proposer will then be required to implement Best Management Practices (BMPs) to reduce erosion and sedimentation and stabilize exposed soils during and after construction. i) NOTE: For silica sand projects, the EAW must include a hydrogeologic investigation assessing the potential groundwater and surface water effects and geologic conditions that could create an increased risk of potentially significant effects on groundwater and surface water. Descriptions of water resources and potential effects from the project in EAW Item 12 must be consistent with the geology, soils and topography/landforms and potential effects described in EAW Item 11. Not applicable. 18 University of Minnesota’s Digital Conservancy. C-32 Geologic Atlas of Sherburne County, Minnesota. Lusardi, Barbara A. (2013). Accessed December 4th, 2024. Retrieved from: https://hdl.handle.net/11299/159393 19 Natural Resources Research Institute. Minnesota Natural Resource Atlas. Accessed December 19 th, 2024. Retrieved from: https://mnatlas.org/gis-tool/ 20 United States Department of Agriculture’s Natural Resources Conservation Service. Web Soil Survey. Accessed December 19th, 2024. Retrieved From: https://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm