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Effective April 28, 2015 Chapter Four Subsurface Sewage Treatment System Regulations <br />(137) Unclassified Body of Water. "Unclassified Body of Water" means any lake, pond, backwater, <br />swamp, marsh, wetland, stream, drainage way, flowage, river, floodplain or other water oriented <br />topographical features not designated as being a natural environment lake, recreational <br />development lake, general development lake, or transition river or tributary stream on the zoning <br />map. <br />(138) Uniform distribution. "Uniform distribution" means a method that distributes effluent evenly <br />over the entire absorption area of a component over both time and space. <br />(139) Valve box. "Valve box" means a watertight structure designed for alternate distribution of sewage <br />tank effluent to segments of a soil treatment system. <br />(140) Vertical separation. "Vertical separation" means the vertical measurement of unsaturated soil or <br />sand between the bottom of the distribution medium and the periodically saturated soil level or <br />bedrock. <br />(141) Watertight. "Watertight" means constructed so that no liquid can get into or out of a device except <br />through designed inlets and outlets. <br />(142) Water Resources. "Water Resources" means all wetlands, streams, rivers, lakes not defined as <br />Natural Environment, Recreational Development, or General Development Lake; Transition or <br />Tributary River/Stream; or Wild and Scenic Rivers. <br />(143) Well capture zone. "Well capture zone" means the surface and subsurface area that supplies water <br />to a water supply well. <br />(144) Wellhead protection area. "Wellhead protection area" means the surface and subsurface area <br />surrounding a well or well field that supplies a public water system, through which contaminants <br />are likely to move toward and reach the well field as regulated under Minnesota Rules, Chapter <br />4720. For the purposes of this chapter, wellhead protection area is that area bounded by the <br />drinking water supply management area as regulated under Minnesota Rules, Chapter 4720. <br />19 Washington County Development Code <br />