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Frntothe be given to the buoyancy potential all of the tanks, due to the potentially high table. This is particularly true for the lift station tanks since they may be placed 7er nd than the tanks located next to the filter beds. For this reason, the invert of the influent ering the lift station tanks cannot exceed 48 inches below existing grade, and should be as ssible. PRESSURIZED FILTER BED SIZING CALCULATIONS Base Tank Capacity= 1,200 gal. However, ADF=2,108 gpd, therefore Calculated Tank Capacity must be used: Calculated Tank Capacity(CTC)= 1,125 +2,108 (ADF) x 0.75 =2,706 Leachline Equivalent Requirement= 1,200 gallons BTC + 2,108 ADF x 0.25 Clay Soil Factor(SF)_ lineal feet of leachline 827 x 4 (Clay Soil - Filter Bed Soil Factor) _ 3,308 sq. ft. filter bed area require . Propo-sed-Frlter-Bed-Area(SingleBed)=31.3 ft SE-NW wide x 53.8�eet SW-NE length= 1,684 sq. ft. 1,684 sq. ft x 2 Filter Beds=3,368 sq. ft to be installed: Each Filter Bed: 5 Infiltrator Chambers wide x 6.25 ft length/chamber= 31.3 ft SE-NW 16 Infiltrator Chambers long x (2.83 ft+ 0.5 ft spacer)=3.33 ft width/chamber=53.8 ft SW-NE. Total Number of Chambers = 5 Chambers width x 16 Chambers length= 80 Chamber x 2 Filter Beds = 160 Standard Infiltrator Chambers SC (Shallow Cover) required. 100% Reserve Replacement Area: This area is denoted on the Site Plans and is situated directly to the northwest of the primary disposal field. The reserve area is triangular in shape. Transport piping / from the primary field should be stubbed-out to the southeast of this area. Reserve replacement area J dimensions: Approximately 110 ft West boundary x 80 ft North boundary x 120 ft Southeast boundary. /Area (s-N ss- ) where s = %z(W+N+ SE) =155. Therefore, Reserve Replacement Area= l\ 4,280 sq. ft/.\ 3,30.8 sq. required. OPERATIONAL SPECIFICATIONS Lilt Stations: ginning with the western and eastern lift stations: Duplex pump system encased in an )QELn oTube® filter pump vault for each lift station to pump non-pressurized effluent, on demand, to the first septic tank through a 1.00 inch PVC transport line. Two - Orenco BioTube® Filter Pump Vaults Part Number (PN): PVU68-1 191. Two - Orenco Duplex Effluent Pump Systems: PN: P100512, %: HP, 10 g m, 230 Vo .' S�epump curves in Appendix G. MVP Duplex Panel for each lift station: PN MVP D anel 30 Volt. An anti-siphon assembly(Model HVAS125) must be used if for an unforeseen reason there must-be pumping downhill. ump Chamber to Filter Bed: The second compartment of last septic tank will be the pump, or dosing chamber for the two separate filter beds. One Orenco BioTube@ Filter Pump Vault-PN: PVU68- 1819L with Duplex Effluent Pump System: PN: 500512, %z HP, 50 gpm, 230 Volt c tained with B-io' Tube Pump Vault. Flowmeters (PN FM 150) to be installed on each transport Tine. Total effluent volume can be verified by checking pump cycle times on the panel to ensure both pumps distributed effluent equally. 16 Chesney Consulting