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7081.0180 MIDSIZED SUBSURFACE SEWAGE TREATMENT SYSTEMS 14 (2) Soil features that have different colors from the matrix color, including but not limited to clay films, organic stains, silt coats, nodules, and concretions. (3) Abundance, size, color, and contrast of redoximorphic features. (4) Soil texture, with modifiers. (5) Grade, size, and shape of soil structure. (6) Moist soil consistence. (7) Abundance and size of rock fragments. (8) Abundance and size of roots. (9) Horizon boundary conditions. (10) Parent materials. (11) Pores, quantity and size. (12) Quantity of boulders and tree stumps affecting construction. (13) Any other characteristic or feature that affects permeability of the soil or treatment of sewage effluent. B. The depth of bedrock, if encountered, must be determined by requirements of part 7080.1100, subpart 8. C. The elevation of standing water evident in any soil pit must be identified. D. The soil must not be described when frozen, at an improper moisture content, or under poor light conditions. Subp. 7. Method. Hydraulic conductivity testing of the soil must be employed, along with a determination of the soil's texture, structure, and consistence, to determine the loading rate of effluent to the soil. The frequency of the observations and measurements must be determined by the professional judgment of the designer, dependent on the variation in soil conditions and the system size, with the frequency of the observations and measurements approved by the local unit of government. Subp. 8. Comparison with soil survey. All field soil information gathered must be compared with soil survey information. Any discrepancies shall be identified. Statutory Authority: MS s 115.03; 115.55 History: 32 SR 1400; 35 SR 1353 Published Electronically: March 11, 2011 7081.0180 SOIL INTERPRETATION FOR SYSTEM DESIGN. Subpart 1. Site and soil information. Site and soil information gathered in parts 7081.0160 and 7081.0170 must be interpreted for suitability for MSTS siting, design, and construction, with consideration of the following: A. surface features impacts from precipitation, run-on, and interflow or any other item that could have potential to adversely impact the ability of the soil to accept water; B. cultural features impacts, including, but not limited to, setbacks and easements; Copyright ©2014 by the Rev so of Statutes, State of Minnesota. All Rights Reserved.