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C. PRESSURIZED FILTER BED SIZING CALCULATIONS <br /> Base Tank Capacity (BTC)= 1,200 gal. The anticipated maximum daily flow of 300 gallons may <br /> occur on any given day of the week, 365 days per year. There will be days where no wastewater How <br /> occurs. 'Phis ADF parameter is unknown. I lowever, the calculations are based upon the 300 gals <br /> ADF occurring seven clays per week, 365 days per year. <br /> Leachtine Equivalent Requirement= 1,200 gallons BTC +300 MAX ADF x 0.250 clay Soil Factor <br /> (SF)=375 lineal feet of leachline (LFLI,) required. 375 x 4 (Clay Soil - Filter Bed Soil Factor) = <br /> 1,500 sg ft filter bed area required. Due to area constraints, a double depth filter bed will be <br /> constructed and increased in area to 14 ft wide by 57 ft long=798 sq ft(1,600 sq ft). The total depth <br /> of the filter bed will be 39 inches as illustrated on the Project Plans. <br /> I <br /> D. DESIGN AND OPERATIONAL SPECIFICATIONS OF THE PRESSURIZED <br /> DISPOSAL SYSTEM <br /> Pump Chamber to Filter Beds: The second compartment oi'the third (last) septic tank will be the <br /> pump, or dosing chamber for the filter bed. Orenco BioTube a ProPackage Filter Pump Vault PN: <br /> BPP20DD with Duplex Effluent Pump System: PN: PF200511, '/2IIP, 20 gpnr, 120 Volt <br /> contained within BioTube Pump Vault, Total effluent volume can be calculated by checking pump <br /> cycle times on the panel and also to ensure both ptunps are distributing effluent equally. <br /> Laterals for the Filler Bed: Sch. 40 PVC 1.0" nominal diameter, 1/8" orifice directed at 12 o'clock <br /> with orifice shields, 5.0 ft spacing and 57 It long. The N-S width is to be 14 ft. "Turn-ups" are to be <br /> installed at the ends of each lateral for clean-out, and contained within valve cover boxes. <br /> Monitoring of the Filter Bed: Monitoring of effluent shall be with two monitoring/inspection ports <br /> within the filter bed area, as noted on the Plan View of the Project Plans. Monitoring/Inspection <br /> tubes: 4" PVC Tee at soil/effluent interface with 4" riser extending above the soil/grass surface, <br /> with a screw type cap. <br /> 'fhc parameters and calculations for the pressurized system are found in Appendix G. <br /> Page -10- <br />