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13 MIDSIZED SUBSURFACE SEWAGE TREATMENT SYSTEMS 7081.0170 Statutory Authority: MS s 115.03; 115.55 History: 32 SR 1400; 35 SR 1353 Published Electronically: March 11, 2011 7081.0170 FIELD EVALUATION. Subpart 1. Generally. Before conducting a field evaluation, the designer shall confer with the local unit of government to determine the requirements and scope of the evaluation, dependent upon system size, soil conditions, and other applicable factors. At a minimum, the requirements in this part must be met. Subp. 2. Property marks. Property lines must be identified as acceptable to the owner. Site improvements, required setbacks, and easements must be identified, located, and marked. Subp. 3. Site area. A general evaluation and description of the proposed soil dispersal area, including a general geomorphic description, current land use, and past land use, if known, must be provided. Subp. 4. Surface features. The following surface features must be identified and described: A. the dominant vegetation; B. evidence of disturbed or compacted soil or flooding or run-on potential; and C. landscape position, including landform, slope gradient, slope direction, and surface morphometry as described in the Field Book for Describing and Sampling Soils Version 2.0, September 2002, developed by the National Soil Survey Center and Natural Resources Conservation Service of the United States Department of Agriculture. The field book is incorporated by reference, is not subject to frequent change, and is available through the Minitex interlibrary loan system. Subp. 5. Soil pits. A. Soil pits are required to investigate the soil for MSTS design. The required number of soil pits to adequately define the limiting layer and soil dispersal system sizing must be determined by professional judgment based on the size of the area and consistency of the soil and must be approved by the local unit of government. B. The qualifying soil pits or borings to be used for the MSTS design must be located on or near the borders of the proposed soil treatment and dispersal area. Soil pits must be dug outside the soil dispersal area if possible. The soil must be observed and described to a depth of at least three feet below the proposed depth of the system. Other soil observations are allowed to be made to supplement the required soil pit information. C. Underground utilities must be located before soil observations are undertaken. Required safety precautions must be taken before entering soil pits. Subp. 6. Soil description. A. The soil properties and features in subitems (1) to (13) must be described according to Field Book for Describing and Sampling Soil, version 2, Natural Resources Conservation Service, United States Department of Agriculture (September 2002), for each soil horizon at each qualifying soil pit. The field book is incorporated by reference under subpart 4, item C. (1) Matrix soil color. Copyright ©2014 by the Rev so of Statutes, State of Minnesota. All Rights Reserved.