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• (c) Permit applications may comply with the requirements of <br />2.06.8(4)(b)(iii) and (iv) with data collected over a shorter period of <br />time or extrapolated by an expert in the field from documented data on <br />water quality and quantity of similar areas, provided that the information <br />provided is sufficient to make the determinations required under 2.06.8(5) <br />and that the data used by the expert is included within the permit <br />application, the expert opinion is approved by the Division, and all such <br />data are made available to the public for review and comment. <br />(d) The surveys required by 2.06.8(3) should identify those <br />geologic, hydrologic, and biologic characteristics of the alluvial valley <br />floor necessary to support the essential hydrologic functions of any <br />alluvial valley floor. Such characteristics which must be evaluated in a <br />complete application, include, but are not limited to: <br />(A) The amount and rate of runoff and a water balance <br />analysis, with respect to rainfall, evapotranspiration, infiltration and <br />• ground water recharge; <br />(B) The relief, slope, and density of the network of <br />drainage channels; <br />(C) The infiltration, permeability, porosity, and <br />transmissivity of unconsolidated deposits of the valley floor that either <br />constitute the aquifer associated with the stream or lie between the <br />aquifer and the stream; and <br />(D) Other factors that affect the interchange of water <br />between surface and ground water systems, including the depth to ground <br />water, the direction of ground water flow, the extent to which the stream <br />and associated alluvial ground water aquifers provide recharge to, or are <br />recharged by, bedrock aquifers. <br />iii) Characteristics supporting the function of storing <br />water which include, but are not limited to: <br />(A) Surface roughness, and vegetation of the channel, <br />flood plain, and low terraces that retard the flow of surface waters; <br />• <br />2.06-23 <br />