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MOUND DESIGN WORKSI IEEE <br />(For Flows up to 1200 gpd) <br />A. FLOW :. <br />Estimated 'io o_; gpd (seepages D-7 or I-3, 4, 5) <br />or r-- •ired gpd x 1.5 = - <br />B. SEI iC TANK L1;. .t VOLUMES <br />o gai....s (see pages C-3 or C-5) <br />C. SOILS (refer to site evaluation) <br />1. Depth to restricting layer = a (. �r 1-1 inches <br />2- Depth of percolatien tests = I ' ' _ inches <br />3. Percolation rate /o, to mpi <br />4. Land slope 5 <br />F hood Sewage Flom is Galling 1- day <br />(ipd) <br />0. <br />Type 1 <br />Type 11 <br />Type 111 <br />Type <br />Retirooma <br />2 <br />300 <br />225 <br />11110 <br />3 <br />650 <br />300 <br />218 <br />6 <br />600 <br />373 <br />256 <br />•�,tl <br />5 <br />750 <br />650 <br />294 <br />r <br />6 <br />900 <br />525 <br />332 <br />Tr L <br />7 <br />1050 <br />600 <br />370 <br />l0 <br />{ 1 <br />1200 <br />6-IS <br />1606 <br />ea" <br />$or* Taak C.paeMleti r a.aw <br />Ti,w►r.r <br />kaiaiarr VV+� <br />I.r.ia e.psry rak <br />B.6,aeau <br />c p-NY <br />araw d4-A <br />a Ter <br />730 <br />1123 <br />1.4 <br />10110 <br />l500 <br />Iw6 - <br />-45W <br />7,109 <br />30W <br />D. ROCK LAYER DIMENSIONS <br />1. Multiply flow rate by 0.83 to obtain required area of rock <br />layer- Daily Flow x 0.83 = 1 <br />90 G x 0.83 sq. ft./gpd = Li sq. ft:+ju"r, - Y;), 1 ° <br />2. Select width of •t•u k layer (10 feet or less) _ _ /C ft. <br />3. Length -f rock layer = Area + Width = <br />q :� ! sq. ft. + - - f t. = ft. Rock tied <br />l <br />E. ROCK VOL: THE <br />1. Multiply rock area by rock depth to get cahic f�c cif rock; <br />LH-L sq. ft. xi:.: ft. cu. ,, <br />2. Divide cu. ft. by 27 cu. ft./cc. j: - to get cubic yards; <br />f+ + 27 = ru. yd. <br />3. M',;'i, ly cubic yi� is by 1.4 to get weight of rock in tons; <br />co- yd. x 1.4 ton/cu. yd. tons. <br />:.::: i .......:......� I <br />�•�•t {.j# ti.4••..�.�.ti.ti. IVidth s10 ft. <br />R. <br />1� F. <br />AI_ : P7ION WIGiH <br />l 1. <br />Percolation rate in to 12 iches of soi .ikoi <br />Absurytiun Width S' <br />2. <br />Select allowable soil loading rate front table ce: - -ge E-; <br />Soil Texture <br />pctdA <br />2 <br />` gpd/ft <br />agYar, 1'.., <br />3. <br />Calculate adsorption width ratio by d. fsg rock layer <br />0A • <br />Coarse Sa,d <br />loading rate of 1.20 gpd/f'2 by allowable s loading ratE, <br />0.,;n5 <br />otlos;- <br />S- J <br />FuKSaoa•- <br />1.20 <br />060 <br />1.00 <br />2.1q <br />1.20gpd/ft2+ .1 `_ gpd/ft2= _ <br />16t s <br />6 w 10 <br />sarLasni o <br />l.a.m <br />0.79 <br />0.60 <br />1.32 <br />2.110 <br />Chem this value ott paXe E-16. <br />31 •: is <br />461o60 <br />Sill loam <br />CI.y I-ovn <br />0-50 <br />0.45 <br />2.40 <br />2.67 <br />4. <br />Multiply adsorption width ratio b} rock layer widit, 1r) get <br />60 to 120 <br />Slo�lhan <br />Clay <br />clay <br />0.24 <br />5.01.1 <br />..... <br />required adsorption width; <br />