2019.02.04 CC Packet - Laserfiche WebLink

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Effective April 28, 2015 Chapter Four Subsurface Sewage Treatment System Regulations Site and soil information gathered in Section 10.2 through Section 10.6 must be interpreted for suitability for MSTS siting, design, and construction, with consideration of the following: (1) 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. (2) Cultural features, including, but not limited to, setbacks and easements. (3) Site conditions affecting system layout, distribution system requirements, and constructability. (4) Layers of coarse soil textures that affect treatment. (5) Disturbed, compacted, cut -filled, or other unnatural condition, if present. (6) The uniformity of the soil over the site. (7) Future surrounding land use changes. (8) Soil sizing factor or loading rate. (9) An approximation of the rise in groundwater from system operations as determined by groundwater mounding calculations. A narrative evaluation of the accuracy of the approximation must be provided. The approximation must be related to the requirements in Section 16.5 (7). 10.8 Flood Fringe. Systems proposed to be located in flood fringes must determine feasibility of relocating the system outside the floodplain. 10.9 Depth. The limiting layer in the soil shall be determined based on the depth of bedrock or periodically saturated soil if encountered. The depth of periodically saturated soil shall be determined according to Section 9.6 (5), and the depth to bedrock shall be as defined in Section 2.2 (9). 10.10 Site Protection. The proposed soil treatment and dispersal areas shall be protected from disturbance, compaction, or other damage by use of stakes and silt fence or snow fence. 10.11 Soil and Site Report. All information required in Section 10.2 through Section 10.10 must be submitted for review by the Department prior to final design. The submittal must also contain: (1) A map of the proposed soil dispersal area, drawn to scale, showing: (A) Features with a setback within 150 feet of the system; (B) Easements within 50 feet of the system; (C) Floodplains, wetlands, and surface waters, within 100 feet of the system; (D) Location and elevation of all soil pits, borings, and hydraulic tests; (E) Two -foot contour lines; (2) Dates and weather conditions during the field evaluation; (3) Elevations of the periodically saturated soil or bedrock; (4) Proposed depths of the system bottom; (5) Proposed soil loading rate; (6) System site boundaries; (7) Anticipated construction related issues; (8) The name, address, telephone number, and certified statement of the individual conducting the site evaluation; and (9) 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. 41 Washington County Development Code