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r? <br />k: <br />if- <br />m <br />:tE-r:;-.*.• <br />4?vV <br />m <br />IW <br />•r <br />fc-v <br />[%-'■■>ir <br />.'t*. <br />.f- . <br />K -V y • <br />>/• <br />jtiiiiiiii <br />A.% m ^J) /« 4-* • /rt ' oMOUI.T) EtSICm PROCEDURE <br />(For FlouaLup \o 120C gpci) <br />A. Sewage Flow Race <br />See D-7 or I»3, 4, or 5, or use <br />metered value; Flow Rate «^ <br />^rc _S?d <br />B. Septic Tank Liquid Volume <br />(see C-3 or C-5) gallons / <br />C. Soil Cheracccrlscics <br />1. Depth to restricting layer <br />such as seasonally saturated <br />soil, bedrock, coarse soil, y <br />2 inches ^etc. ; _ <br />2. Depth of percolation tests; <br />/ff inches ^ <br />3. Number or p<^rcoiacion test <br />holes;holeb <br />4. Ave. percolation race; <br />/2 .4 npi <br />5. Landslope <br />D. Rocl-; Laver Dimensions <br />1. Multiply gpd by 0.S3 to <br />obtain require! area of <br />rock layer; <br />gpd X 0.83 ■ 7SO sq ft / <br />2. Select width of rock layer <br />(10 feet cr less) • /C’ feet <br />3. Length of rock layer • Area <br />- Width 7SO sq ft - ft <br />• 7S.O ft ‘ / <br />E. Rock V '.ume <br />1. Multiply rock area by rock dept!; <br />CO get cubic fe^ of rocl^ <br />7 sq f t X £t f c <br />2. Divide cu ItfiY 27 ciHATcu yd <br />to gee cubic yards; J‘ <br />3. Multiply cubic yards by 1.4 to <br />get weight of rock in tons; <br />2CS-2c \i yds X 1.4 ■ ??. /7tons <br />/ <br />?rccsurc Dislribulion Svstc:.’ <br />Saiccc number o; periorcLC/ <br />Inccrais ^ <br />Sclecr perforatioiv <br />4 4.7 <br />3. Select perforated lateral <br />length; Note if manifold it <br />at end of rock layer, loccr.il <br />length is rock layer Icn;?::; <br />less half a perforation <br />spacing. If manifold is <br />center of rock laver, lateral <br />lc;igch is ono-iial: roc%.r» <br />length less half a perfor.::iar. <br />snacinp. <br />length •* <br />Perf ora ccc! <br />f <br />Ccc! latur.y^ <br />W • w <br />Divide laceral lengih by <br />n • c o ^ •" <br />nerforaiions per later;:! <br />■ ' r feet r 2 -cut - <br />h'ctc: last perforation mu^it bt <br />y <br />e^ > <br />in end cap. see page K-l!' <br />Multiply perforations per <br />lateral by number o <br />to get cocai number of <br />perforations; <br />' r>cr:s/lat ;</ ^- i a c r - y <br />6. Determine required flow <br />by multiplying number <br />perforations by flow per' <br />perforation (see page <br />7 -• perfs x Q. ^Vgpm/perf gp::; V <br />IV r^Ku <br />7.7T3>e«s^i > * VVc. <br />Select minimum required* laicr.'i! <br />diameter from table on Page E-17; <br />enter table with perforation <br />spacing, perforation diameter, <br />and number of perforations pur <br />lateral. Select miniimm <br />diameter for perf ora ^e<nate?\l <br />■ inches <br />G. Basal V.’idth <br />(IV <br />fb ''/•‘(■"ICH. <br />I. Parcolacion race in cop *.2 <br />inches of soil is 7 mpi <br />Select allowable soil loadlnn <br />rate from table on page E-le; <br />*. "y_spd/ft2