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wastewater design · MCU22/0192
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*Note — AS/NZS 1547-2012 (Appendix H, Table H1) lists the typical wastewater design flow allowance for households with an on-site roof water tank supply as 120litres/person/day (all wastes). With the installation of standard water reduction fixtures the design flow can be reduced substantially. Where the design flow ‘Q’, nominated above, is exceeded the area (Ai) will need to be increased accordingly. On-site sewerage systems are not suitable for accepting waste from garbage grinders. In this instance and specifically for the future shed we have used the maximum DLR rate of 8 mm/day due to the likely intermittent use and with the recommended use of a septic tank with outlet filtration. Unearthed Geotechnical P/L. 4 Design Report 022-164
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