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] <br />] <br /> <br />§ 8.30 <br /> <br />The portions of any buried sewer more than 50 feet from a well <br />shall be constructed of material as approved by the State <br />Pl~mb~ug Code. <br /> <br />All joints between pipes and fittings in the bu/lding sewer shall <br />have watertight and root-tight joints. Portland cement mortar <br />joints shall not be al]owed. LLues shall provide a grade of not ]ess <br />than.lZ5-inch per foot~ Where building sewers exceed 50 feet in <br />]&ngth, ]~nes sb~]] provide a gTade wlLich will allow a flow velocity <br />of not less than 2 feet per second. In no case shall the grade <br />exceed 2%. All changes of grade shall be by means of long sweep <br />e11s. V~here long sweep ells are not used and where the direction <br />changes by more than 20.5 degrees, accessible watertight clean- <br />outs sh~]l be provided. <br /> <br />SubcL 2. Septic mnk~ <br /> <br />a. General. Ail tanks, regardless of mater/a] or method of <br /> construction, sh~]] be: <br /> <br /> One piece, precast; <br /> <br />V~ratert[ght; <br /> <br />So designed and constructed as to withstand all lateral earth <br />pressures ~nder saturated soil conditions v~ith the tank <br />empty;, <br /> <br />So designed and constructed as to withstand a rn~nimum of 7 <br />feet of saturated earth cover above the t~nk top; <br /> <br />Not subject to excessive corrosion or decay. <br /> <br />b. DesiKn. A/1 tan~s, regardless of material or method of <br /> construction, st/ail confoz:m to the following design criteria. <br /> <br />The liquid depth of any septic tank or compartment thereof <br />shall be not less than 30 inches. A liquid depth greater than <br />6.5 feet sha]l not be considered ha determining t~n~ capacity. <br /> <br />No .tank or compartment thereof shall have an inside <br />horizontal d;rnension less than 24 inches. <br /> <br />Inlet and outlet connections of the t~nk shall be submerged <br />by means of barf1 es. <br /> <br />The volt,me in the' tank between the liquid surface and the <br />top of the Lu]et and outlet bar[les shall be not ]ess than 20% of <br />the total requ/red liqu3d capacity, except that in horizontal <br />cylindrical t~nks, *.B~s space shall be not ]ess than 15% of the <br />total required Liquid capacity. <br /> <br />Inlet and outlet baffles shall be constructed of acid resistant <br />concrete, acid resistant fiberglass, or plastic. <br /> <br />Printed 12/28/90 <br /> <br />Pa~e 9_41 <br /> <br /> <br />