2019.02.04 CC Packet - Laserfiche WebLink

Home

Effective April 28, 2015 Chapter Four Subsurface Sewage Treatment System Regulations SECTION 10 MSTS SITE EVALUATION AND SOIL TESTING 10.1 Necessity of Soil and Site Evaluations. Soil and site evaluations must be conducted for MSTS design. The evaluations must be conducted according to this Section and Section 9 of this Chapter. Evaluations must identify and delineate an initial and replacement soil treatment and dispersal area with appropriate system boundaries. 10.2 Preliminary Evaluation. A preliminary evaluation for midsized subsurface sewage treatment systems shall consist of determining: (1) The design flow, anticipated effluent concentrations of biochemical oxygen demand, total suspended solids, and oil and grease, and anticipated presence of nondomestic strength waste from the dwelling, dwellings, or other establishments. (2) Whether the location of water supply wells impacts the location of the system due to setback constraints. (3) Whether building improvements will be within 50 feet of the proposed soil treatment and dispersal area. (4) Whether buried water supply pipes will be within 50 feet of the proposed system. (5) Whether easements will be within 50 feet of the proposed system. (6) Whether the ordinary high water level of public waters will be within 500 feet of the proposed soil treatment and dispersal area and if so, a preliminary assessment of phosphorus impacts to the surface water. (7) Whether the system will be located in a floodplain and the system location in relation to the 100- year flooding elevation from published data if available or data that is acceptable to the Department or local unit of government. (8) The required setbacks from the proposed soil treatment and dispersal system. (9) The soil survey information on the proposed soil dispersal area, including the soil map, map units, landscape position, parent material, flooding potential, slope range, periodically saturated soil level, depth to bedrock, texture, color, and structure of soil horizons, and permeability of soil horizons. (10) A geocode or property identification number. (11) The names of the property owners; and (12) The location of the system on a United States Geological Survey quadrangle map of the proposed soil treatment and dispersal area and the area within one mile. 10.3 Field Evaluation. Before conducting a field evaluation, the designer shall confer with the Department 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 Section must be met: (1) Property Lines. Verifying property line location and soil test locations is the responsibility of the property owner. Site improvements, required setbacks, and easements must be identified, located, and marked. (2) 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. (3) 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. (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. (4) Soil Pits. 39 Washington County Development Code