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Effective April 28, 2015 Chapter Four Subsurface Sewage Treatment System Regulations <br />SECTION 16 TREATMENT AND DISPERSAL <br />16.1 General. <br />Treatment and dispersal of all sewage for new construction or replacement SSTS must in compliance with this <br />Section and Section 17 to Section 21. <br />16.2 General Technical Requirements for All Systems. <br />All new construction or replacement SSTS must be designed to meet or exceed the following provisions: <br />(1) All treatment and dispersal methods must be designed to conform to all applicable federal, state, <br />and local regulations. <br />(2) Treatment and dispersal processes must prevent sewage or sewage effluent contact with humans, <br />insects, or vermin. <br />(3) Treatment and dispersal of sewage or sewage effluent must be in a safe manner that adequately <br />protects from physical injury or harm. <br />(4) An unsaturated zone in the soil must be maintained between the bottom of the soil treatment and <br />dispersal system and the periodically saturated soil or bedrock during loading of effluent. <br />(5) Soil treatment and dispersal systems must not be designed in floodways. Soil treatment and <br />dispersal systems installed in flood fringes must meet the requirements of Section 18.2. All soil <br />treatment systems located in areas subject to excessive run-on must have a diversion constructed <br />upslope from the system. <br />(6) SSTS components must be setback in accordance with Table V. <br />(7) No component of an SSTS is allowed to be located under or within the structure or other <br />impermeable surface. <br />(8) Flow measurement must be employed for all single family dwellings and other establishments with <br />a pump tank, all single family dwellings with a Type III, IV, V systems, and all multi -family <br />dwellings. <br />60 Washington County Development Code <br />