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V ..i F SSURIZED FII TER BED SIZING CALCULATIONS apacity= 1,200 gal. ADF= 1,586 gpd,therefore Calculated Tank Capacity must be used: ank Capacity(CTC)= 1,125 + 1,586(ADF)x 0.75 =2,315 galsquivalent Requirement= 1,200 gallons BTC+ 1,586 ADF x 0.225 Sandy Loam(Silt) Soil Factor (SF)at soil-effluent interface=627 lineal feet of leachline(LFLL). 627 x 3 (Silty Sandy Soil-Filter Bed Soil Factor)= 1.881 sa.ft. filter bed area required. RECIE- E10 Proposed:Two separate Filter Bed Areas to alternate pumping between duplex pump system: � v Single Filter Bed Size=95 ft N-S Long x 10 feet E-W width= JUN 1 2 2006 950 sq. ft. x 2 Filter Beds= 1,900 sq. ft.Filter Bed to be constructed. ENVIRONMEN i HEALTH 100% Reserve Replacement Area: The reserve area is divided into two separate filter bed? 1Td primary filter beds. The reserve area is denoted on the Site Plans and is situated directly to the east and to the south of the primary disposal field. Transport piping to the primary field should be stubbed-out to these two reserve areas. Reserve replacement area dimensions are equivalent to the primary filter bed areas: Two cells 95 ft long and 10 ft wide. E.L.F. DESIGN AND OPERATIONAL SPECIFICATIONS Pump Chamber to Filter Beds: The second compartment of the third(last) septic tank will be the pump,or dosing chamber for the two separate filter beds. One Orenco BioTube®Filter Pump Vault PN: PVU57- 2425L with Duplex Effluent Pump System: PN: P500512, Y211P,50 gpm,230 Volt contained within BioTube Pump Vault. Flowmeters(PN FM150)to be installed on one transport and multiplied by two. Total effluent volume can be verified by checking pump cycle times on the panel to ensure both pumps distributed effluent equally. 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, 92 ft long. This lateral length allows for 1.5 ft of drain rock extending beyond each end of the 92 ft lateral to give the final filter bed a N-S length of 95 ft(92+1.5+1.5 =95 ft). "Turn-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 92 ft . 4.0 ft=23 orifices/lateral x 0.68 gpm/orifice= 15.6 gpm/lateral An anti-siphon assembly(Model IIVAS 125)must be used if for an unforeseen reason there must be pumping downhill. Network Discharge Rate(NDR)For Each Filter Bed=2 laterals x 15.6 gpm/lateral=33 gpm Manifold for Each Filter Bed= 1.5" Sch.40 PVC, 3.3 ft length Estimated Total Dose Volume(TDV)From Each Pum): 0.092 gals/ft x 92 ft x 2 laterals= 17 gals x 5 times lateral void volume=85 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-25 ft=2 gals 85+0.3+2=88 gals/dose=29.4 gpm=3 min/dose 1,586 gpd ADF=88 gals/dose= 18 doses/24 hr period/each pump Monitoring of Each Filter Bed: Monitoring of effluent shall be with four monitoring ports 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. 18 Chesney Consulting