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RESIDENTIAL PRESSURE DISTRIBUTION DESIGN <br /> TRENCH TYPE DISPERSAL CELL <br /> Complete information in red framed boxes. 1000 <br /> gpd maximum design flow. <br /> In-pounds Metric <br /> Residential or commercial r (r or c) <br /> Slope 3 % HOLE DIAMETER <br /> CONVERSIONS <br /> Depth to limiting factr , a in 134.6 cm 1/8 =0.125 <br /> Wastewater flow rate r 450 gpd 1703.3 Lpd 5/32=0.158 <br /> In situ soil infiltration rate 0.8 3/16=0.188 <br /> gpd/ft2 32.6 Lpd/m2 7/32=0.219 <br /> System elevation 95.32 ft 29.05 m 1/4=0.25 <br /> 9/32=0.281 <br /> Number of trenches 2 5/16=0.313 <br /> Center or end manifold c (c or e) <br /> Distance between laterals 10.00 ft I 3.05 Im <br /> Hole diameter 0.250 0 .128,0.158,0.188,0.218,0.25, <br /> 0.281,or 0.313 inch only. <br /> Forcemain length 1 120.0 ft Estimated hole space 4.00 ft Not a final calculation <br /> Forcemain diameter 2.0 in Minimum dose > 10 times void volume <br /> Forcemain actual I.D. 2.067 in Pump tank elevation 85.00 ft outside bottom. <br /> SYSTEM SOLUTIONS <br /> In-pounds Metric <br /> Estimated daily flow 450 gpd I 1703 ILpd <br /> Observation <br /> Pipe Detail Absorption cell <br /> i I Design area 562.5 ft2 52.26 m2 <br /> typ.obs.pipe Linear load rate 6.34 gpd/ft 78.6 Lpd/m <br /> (anchored Design width 4.00 ft 1.22 m <br /> securely) Cell length 71 ft 21.64 m <br /> Depth of cell 9.5 in24.1 cm <br /> ilis"(152 mm) Lateral top elev. 95.95 ft 129.25 m <br /> T <br /> TYPICAL TRENCH CROSS SECTION DETAIL finished grade <br /> has min.20"(51 cm) <br /> fill over lateral. <br /> original grade:min.6" code compliant cover material- <br /> (15.2 cm)above lateral. 2 in <br /> :Drench design <br /> 5 <br /> cm <br /> 1.5 <br /> In <br /> la <br /> t. <br /> dia. <br /> 95.82 2ft <br /> lateral <br /> invert <br /> rt <br /> 29.11 m elevation <br /> 6i <br /> ns (15.2cm)aggregate laid <br /> below <br /> lateral .. <br /> and ... <br /> 2' a 5 , . <br /> above <br /> cm .. <br /> lateral. lateral(s). .�'� <br /> ": F 95.32 _ ft <br /> I <br /> 28.96 m <br /> 4.O0Ift ( 1.22Im system elevation <br /> Project: New 3 Bedroom Home <br /> Transaction Number: Page 2 of 7 <br />