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§ 8.30 <br /> <br />Page 254~ <br /> <br />Subc% 7. <br /> <br />C · <br /> <br /> 3. Drainfield rock must not be placed in contact with original <br /> soil having a percolation rate slower than 60 minutes per <br /> inch. <br /> <br />4. V~here the percolation rate of the orig~n~) soil is slower thin <br /> 60 minutes per inch, at least 12 iuches of f0J ~n~terial having <br /> a texture defined as sand must be placed between the <br /> drainiSeld rock and the original soil along tlde excavation <br /> bottom. <br /> <br /> 8. Construc~on equipment wheels or tracks must not be placed <br /> in contact v~th the bottom of the excavation dur~nf the <br /> con£:truction of a soil treatment system in soils havinf a <br /> percolation rate slower than 18 nziuutes per inch. <br /> <br /> The size of the soil treatment system must be based on an <br /> acceptance rate of 0.B4 gallons per. sq~ara foot~ v~hich is <br /> equivalent to a sizing factor of zt.£ square feet per gallons per <br /> day. <br /> l~] ~rea~r-ent And H~posal - albarnadve sys~r-~ <br />General The conten~s of this section apply to the ~nal treatment <br />mud disposal of the effluent of a system constructed in accordance <br />v~th §8.$0.4. The intent of this section is to provide sewage <br />treatment solutions for those s~te or soil conditions where a <br />standard system cannot be installed or is not the most soJtab]e <br />~pe of sewage treatment system. <br /> <br />1. V~nere natural drm{uage will not provide 4 feet of separation <br /> between the bottom of the soil treatment area and the highest <br /> known or calculated level of the water table, agricultural <br /> drain tile may be used to intercept or lower the seasonal lmigh <br /> water table, except with shorelanda of. pubic watera. There <br /> shall be at leaat 10 feet of ~ndisturbed soil between the <br /> sidewall of the soil treatment ~n{t and the agricultural drain <br /> tile. <br /> <br /> V~ithin shorelands of public ~vaters, agricultural drain tile <br /> may be used 'to intercept the seasonal high water table, <br /> provided the groundwater table has a slope of at least B feet <br /> per 100 feet toward the public v~ater, and provdded the drain <br /> tile are installed upslope of the soil treatment systezn~ There <br /> shall be at least 20 feet of undisturbed soil between the <br /> sidewall of the soil treatment ~n{t and the agricultural drain <br /> tile. <br /> <br /> In all cases, the greatest practicable vertical separation <br /> distance from the water table shall be pro~dded. <br /> <br />Rapidly penneable soils. <br /> <br />Printed 12/28/90 <br /> <br /> <br />