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<br />'"" it 1 <br />?d ~ <br /> <br />6-115 All seepage pits constructed shall be not less than seventy-five <br />(75) feet from any water supply, twentJr (20) feet from any building and <br />ten (10) feet from any property line. <br /> <br />6-116 The effective absor~tion area of a seepage pit shall be calcula- <br />ted as the side area, below the inlet, "exclusive of any hardpan, <br />rock or clay formation. <br />There shall be a minimum of four (4) feet of porous formation for <br />each installation. This four (4) feet depth may be provided in <br />one (1) or more pits. <br />Where soil porosit:.c is questionable, at least twenty (20) feet <br />vertical depth below inlets shall be provided in one (1) or more pits. <br /> <br />RE QUI RENE?J TS <br /> <br />FOR SEEPAGE PIT DESIGN <br />Effective absorption area requirements <br />in sq. ft. of wall area of pit exclu- <br />sive of curbing, per bedroom. <br />20 <br />30 <br />50 <br />60 <br />160 <br /> <br />Eharacter of soil <br />~oarse sand or gravel <br />Fine sand <br />Sandy Loam or Sandy Clay <br />Clay with considerable sand or gravel <br />Clay with small amount of sand or gravel <br />Heavy tight clay, hardpan, rock, or other <br />impervious formations <br /> <br />Unsuitable <br /> <br />6-117 All disposal fields shall be constructed in an open unshaded area. <br />All parts of a drainage field shall be not less than fifty (50) feet <br />from any water supply, twenty five (25) feet from any streams and <br />ten (10) feet from dwellings or property lines. <br /> <br />6-118 All trenches in a disposal field shall bEt of the same width and length <br />and the following standards shall be required: <br />}finimum number of lines per field-- 2 <br />Maximum length of individual lines 100 feet <br />Minimum bottom width of trench 18 inches <br />}~mum depth of cover for tile lines 36 inches <br />Preferred depth of cover for tile lines 18 inches <br />~onstruction of disposal trenches in filled ground will not be per- <br />mitted. <br /> <br />6~ Field tile used in a disposal field shall be hot lessthan four (4) <br />inches in diameter and shall be laid with one-fourth (1/4) inch <br />open joints. All open joints shall be protected on top by strips of <br />asphalt treated building paper. All bends used in the disposal field <br />shall have one (1) tight joint at each end of the bend. <br /> <br />6-119 The maximum grade permitted in the installation of tile in drainAge <br />fields shall be six (6) inches :per one hundred (100) feet. The 3inimum <br />grade permitted shall be two (2) inches per one hundred (100) feet. <br /> <br />6-121 The filter material to be used in disposal fields' shall be crushed <br />stone, gravel, slag, clean cinder or similar material having sufficient <br />voids. Such material may vary from one-half eJ,/2) to two and one-half <br />(2-1/2) inches in sizt and it shall be free of excessive fine material. <br /> <br />-38- <br />