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F7(both e Replacement Area: The area directly adjacent to the south of the primary filter enoted as the replacement/reserve area. This area consists of the primary filter bed j r beds) of 3,330 sq. ft, as illustrated on the Site Plans. Piping maybe stubbed-outary filter bed to this reserve area in the event this area must be activated before City r arrives to the project site. FILTER BED DESIGN AND OPERATIONAL SPECIFICATIONS Pump Chamber to Filter Bed(Subject to Change): The third(northernmost tank), 2,000 gallon septic tank northwest of the restrooms is the pump chamber for pressurizing the filter beds. A Duplex Pump System is encased in an Orenco BioTube® filter pump vault to pump the effluent through a 2.00 inch PVC transport line. One Orenco BioTube® Filter Pump Vault PN: PVU68-2425L with Duplex Effluent Pump's System: PN: 501012, 1 HP, 50 gpm, single phase 230 Volt contained with BioTube Pump Vault. Total effluent volume can be verified by checking pump cycle times on the panel to ensure both pumps distributed effluent equally. See pump curves in Appendix E. MVP Duplex Panel PN: MVPDAX2ROCSSA,with current sensor An anti-siphon assembly(Model HVAS 125) must be used if pumping proceeds downhill. Laterals for Each Filter Bed: Sch C 1.5"nominal diameter, 1/8" orifice directed at 12 o'clock,4.0 ft spacing, 100 ft long. "Tum-ups he ends of each lateral for clean-out contained within valve cover boxes. Orifice Discharge Rate: 1/8" with 5 ft residual head=0.43 gpm 100 ft=4.0 ft=25 orifices/lateral x 0.43 gpm/orifice= 10.75 gpm/lateral Network Diso�arge Rate (NDR)For Each Filter Bed= 5 laterals x 10.75 gpm/lateral= 53.7 gpm Transport Line Size=2.0" Sch. 40 PVC Manifold for Each Filth Bed= 1.5" Sch. 40 PVC Total Dose Volume (TDV)From Each Pump: 0.092 gals/ft x 100.0 ft x 5 laterals=46 gals x 5 times lateral void volume=230 gals 1.5" x 17 ft manifold=0.092 gals/ft x 17 ft=2 gals Transport line= 2" =0.163 gals/ft x -50 ft= 8 gals 230+2+ 8=240 gals/dose-53.7 gpm=4.5 min/dose 1,775 gpd ADF-240 gals/dose=7.4 doses/24 hr period/each pump Infiltrator Specifications: / See Appendix F. Quick 4TM Standard Infiltrator Chamber. Due to clayey/silty soil structure at soil-effluent interface, a 2.5 inch layer of!2J washed sand must be laid down over a !p owed soil surface before installation of chambers. This will prevent"silt-over"or siltation of the interface that may be caused by a portion of the pressurized effluent splashing down onto the native soil surface. Siltation would cause a significant reduction in infiltration and percolation. Volume of sand required: 3,330 sq. ft of filter bed x(2.5inches x(1+12))=694 ft',or 26 yds' g / Monitorinof Each Filter 13ed: Monitoring of effluent with four monitoring ports or wells within,or on the perimeter of each filter bed area. Observation tubes: 4"PVC Tee at soil/effluent interface with 4" riser extending above the soil/grass surface by at least 0.5 foot, with a screw type cap. Page -14- Chesney Consulting