SU0004688 SSNL - Laserfiche WebLink

Home Browse Search

Fslipngle AND OPERATIONAL SPECIFICATIONS Filter Beds: The second compartment of septic tank will be the pump, or dosing chamber Cd. One Orenco BioTubeg Filter Pump Vault PN: PVU572425L with Duplex Effluent : P500512, '/2 HP,50 gpm,230 Volt contained with BioTube Pump Vault. One Flowmeter(PN FM150)to be installed on the transport line. Laterals for Each Filter Bed: Sch.40 PVC 1.5" nominal diameter, 5/32" orifice directed at 12 o'clock with orifice shields,4.0 ft spacing, 88 ft long. As with the Office Building Filter Bed, 1.5 ft of drain rock must extend beyond each end of the 88 ft lateral to give a final filter bed N-S length of 91 ft(88+1.5+1.5 =91 ft). "Tum-ups"are to be at the ends of each lateral for clean-out, and contained within valve cover boxes. Orifice Discharge Rate: 5/32" with 5 ft residual head=0.68 gpm 88 ft-4.0 ft=22 orifices/lateral x 0.68 gpm/orifice= 15 gpm/lateral An anti-siphon assembly(Model HVAS125)must be used if for an unforeseen reason there must be pumping downhill. Network Discharee Rate(NDR)For Each Filter Bed=2 laterals x 15 gpm/lateral=30 gpm Manifold for Each Filter Bed= 1.5" Sch. 40 PVC, 3.3 ft length Estimated Total Dose Volume(TDV)From Each Puma: 0.092 gals/ft x 88 ft x 2 laterals= 16.2 gals x 5 times lateral void volume=81 gals 1.5" x 3.3 ft manifold=0.092 gals/ft x 3.3 ft=0.3 gals Transport line= 1.5"=0.092 gals/ft x -108 ft= 10 gals 84+ 1 + 10=95 gaWdose+30 gpm=3.2 min/dose 150 gpd ADF-=95 gals/dose= 1.6 doses/24 hr period/each pump alternating to single disposal field. Monitoring of Each Filter Bed: Monitoring of effluent with four monitoring ports or wells within the filter bed area. Two monitoring ports are to be observation tubes,with the other two monitoring ports to be soil sampling ports. Observation tubes: 4" PVC Tee at soil/effluent interface with 4" riser extending above the soil/grass surface, with a screw type cap. Tubes must be placed in low areas to check for pooling. Soil sampling tubes: 4" PVC pipe extending to soil/effluent interface with 4" riser extending above the grass surface by at least 0.5 foot,with a screw type cap. Both soil sampling tubes must be placed in proximity to a lateral orifice. IV. CONCLUSIONS AND RECOMMENDATIONS SSS§ 5.4 The soils underlying the proposed filter bed disposal area for the East Leach Field (ELF)to serve the new Office Building and the soils under the West Leach Field (WLF) disposal area to serve the Office Trailers show excellent permeability. Permeability was measured as percolation rates in the soil profiles from two feet in depth,which is the approximate soil-effluent interface, down to five feet(60 inches) in depth. 20 Chesney Consulting