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16. A vegetative cover shall be established over the soil treatment area. <br /> <br />q.07 Final Treatment and Disposal - Alternative Systems. <br /> <br />a. General. <br /> <br /> The contents of this section apply to the final treatment and disposal of <br />the effluent of a system constructed in accordance with Section 4.0. The intent <br />of this section is to provide sewage treatment solutions for those site or soil <br />conditions where a standard system cannot be installed or is not the most suitable <br />type of sewage treatment system. The contents of this section do not approve of <br />locating systems in such marginal sites but rather offer procedures for ~p§rading <br />existing systems so located. <br /> <br />b. Fluctuating Groundwater. <br /> <br /> I. Where natural drainage will not provide four feet of separation between <br />the bottom of the soil treatment area and the highest known or calculated level of <br />the water table, agricultural drain tile may be used to intercept or lower the <br />seasonal high water table, except within shorelands of public waters. There shall <br />be at least ten feet of undisturbed soil between the sidewall of the soil treatment <br />unit and the agricultural drain tile. <br /> <br /> 2. Within shorelands of public waters, agricultural drain tile ma~ be used <br />to intercept the seasonal high water table provided the groundwater table nas a <br />slope of at least two feet per hundred feet toward the public water and provided <br />the drain tile are installed upslope of the soil treatment system. There shall be <br />at least 20 feet of undisturbed soil between the sidewall of the soil treatment <br />unit and the agricultural drain tile. <br /> <br /> 3. In all cases the greatest practicable vertical separation distance from <br />the water table shall be provided. <br /> <br />c. Slowly Permeable Soils. <br /> <br /> I. In no case shall filter material be placed in contact with original soil <br />having a percolation rate slower than 60 minutes per inch. <br /> <br /> 2. In no case shall construction equipment, wheels or tracks be placed in <br />contact with the bottom of the excavation during the construction of a soil treatment <br />system in soils having a percolation rate slower than 15 minutes per inch. <br /> <br /> 3. The size of soil treatment system shall be based on the required treatment <br />area for a soil having a percolation rate of 60 minutes per inch as specified in <br />Table 4-1. <br /> <br />17 <br /> <br /> <br />