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06/1.5/99 TUE 16:38 FAX 770 435 5997 FACILITY ENGRS j fJ010 <br /> arth <br /> 8.5 .3. <br /> The filter material shell oux`ieprotected <br /> aspha►lt-�setura'tedefelt <br /> backfill by fifteen (15) p <br /> o;r other approved material. <br /> Methods at aaleulatirk9 , leach lila reslttiremeutd and <br /> filter bed are&- SOIL FACTOR <br /> 50IL 50 <br /> 5.6. 7 . Clay and/or Feat <br /> Silt and/or Sandy Cl9by i+c+aa . 206 <br /> 8.fi. 3. <br /> Sand and/or Sandy Loam <br /> Multiply the Base TankCapacity (B7,C� Mus tlYe Average Daily <br /> -Flow (ADF) of setragge by the 'otar to determine the <br /> lineal feet of Leach luxe required <br /> Example: 1200 gal_ ETC + 1200 gal. ADF -2400 gal. CTC <br /> 2400 x 225 = 540 lineal feet of leach ls.)me two <br /> feet aide for sandy clay loam. <br /> 8.1 - Filter Beds <br /> g. , i• the <br /> The minimuo depth of the filter material under <br /> I pe,r forested pipe altall be twelve (12) inc"O <br /> There aball be a Minimum of at <br /> at last two (2) incbec of <br /> filter material over the p <br /> 9 .7 .3 , pok '4t�lter bed 211all be asphalt saturated c ofeltd oritot:h.erft <br /> poux7�l approved <br /> asp <br /> materials prior to backfill . <br /> The filter bed $Sae will be Computed on the following <br /> basis= <br /> Calculate the letsgth of Leach 11pe reQt�irement. <br /> Multiply* this by three In sasdyxedls and foufour <br /> ill <br /> Clay voila . This gi.-res r qi <br /> of filter bed. <br /> 8 . 8: Seepage pits may be used ,for final Bff�.nsnt ciispK+sal. <br /> Leexoh lines shall NO- rejuired with seepage pits <br /> installations, uuleee otbervise tepea9.ficd by the <br /> Director of Environmental Health. <br /> 8 . 3 . 5 . The filter material in <br /> the dispQ631 trench sha11, <br /> fl from the <br /> it <br /> terminate at leacst it barfive <br /> etB <br /> trieuch shad be <br /> excavation. The p <br /> undieturbed *oil below the grade line of the tight <br /> l,ir,e . On1Y soil shall be gr-cked arcunct <br /> c,.sndvit betaeeA <br /> leach line and pit. No roof: or building POPer will be <br /> aFproYed inthis five (5) jivat area . The terlainal encs <br /> of this tight Zine must: be elevated fear (4) inches <br /> above t1ie call of the leach :.ise . <br /> f 17 <br />