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7081.0210 MIDSIZED SUBSURFACE SEWAGE TREATMENT SYSTEMS 16 C. elevations of the periodically saturated soil or bedrock; D. proposed depths of the system bottom; E. proposed soil loading rate; F. system site boundaries; G. anticipated construction -related issues; H. name, address, telephone number, and certified statement of the certified individual conducting the site evaluation; and I. a narrative explaining any difficulties encountered during the site evaluation, such as, but not limited to, identifying and interpreting soil and landform features, and how the difficulties were resolved. Statutory Authority: MS s 11 S. 03; 115.55 History: 32 SR 1400 Published Electronically: March 11, 2011 7081.0210 GROUNDWATER INVESTIGATION. Subpart 1. Necessity of investigation. A preliminary groundwater evaluation must be conducted for all proposed MSTS according to this part. Subp. 2. Preliminary investigation. The following information must be ascertained from the best available information: A. the size of the soil dispersal system, proposed loading rate, and system geometry; B. the township, range, section number, and other unique property identifiers, as required by the local unit of government, of the parcel where the proposed soil dispersal area is to be located; C. any anticipated discharges from nondomestic sources to the proposed MSTS; D. the location of the MSTS on a United States Geological Survey quadrangle topographic map, including the area within a one -mile radius of the proposed soil treatment system; E. a determination of the general geology, periodic soil saturation, regional groundwater setting, and aquifers used for water supply and a description of the general site hydrology characteristics, including, but not limited to, identification and estimated depth measurements to geologic units and aquifers, and identification of groundwater confining strata; F. a determination whether the proposed system is in a drinking water supply management area, inner wellhead management zone, source water protection area, or groundwater sensitive area; G. an assessment of all water supply wells within a 300-foot radius of the proposed soil treatment area with a minimum assessment of well locations and casing depths from well construction log records. If no records exist, the well locations and casing depths must be estimated; H. a determination or estimation of groundwater flow direction; and 1. an assessment of nitrogen impacts from the system. Subp. 3. Field or further investigation. The designer must consult with the local unit of government to determine whether the local unit of government will require a field or further groundwater investigation and, if so, the extent of the investigation. The field or further investigation must be conducted if information Copyright ©2014 by the Rev so of Statutes, State of Minnesota. All Rights Reserved.