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<br /> <br />35 <br />have the same texture and density as the <br />adjacent soil. <br /> <br /> 15. The minimum depth of cover over the <br />distribution pipes shall be at least 8 inches. <br />The maximum depth of cover over the <br />distribution pipes shall be no more than 36 <br />inches and preferably no more than 24 <br />inches. <br /> <br /> 16. A grass cover shall be established by the <br />owner or his agent over the soil treatment <br />system. <br /> <br />C. ALTERNATIVE SYSTEMS <br /> <br />1. General – the intent of this portion of the regulation is to <br />provide guidelines for the design, location, installation, use and <br />maintenance of alternative sewage treatment systems in areas <br />of limiting soil characteristics, or where a standard system <br />cannot be installed or is not the most suitable treatment. <br /> <br />2. Modified Standard Systems <br /> <br />a. Extreme caution and careful planning shall be employed <br />wherever limiting characteristics including, but not limited <br />to water table or bedrock, exist within 2 ft of the original <br />ground surface. <br /> <br /> b. Fluctuating ground water: <br /> <br /> 1. Where natural drainage will not provide 30 inches of <br />separation between the bottom of the soil treatment <br />area and the highest known or calculated level of the <br />water table, agricultural drain tile may be used to <br />intercept or lower the seasonal high water table, <br />except within shore-lands of public waters. There shall <br />be at least 10 feet of undisturbed soil between the <br />sidewall of the soil treatment unit and the agricultural <br />drain tile. <br />Commented [bas1]: Should this be 24 inches per the Richland <br />code…also see the Richland code page 33, that refers to 30 inches as well? (see Design and Construction, page 32 section C.1. of this document)