06/1354 - Response to Information Request [As Published] · 132006.1354

6. Effluent Disposal Area Design Type and Size

From Clause 4.2A7.3.2 of ASNZ1547-2000, disposal area size is determined from

The formula:
L= QADLRxW) or Area = Q/DLR

Where: L= length in metres
Q daily design rate in I/day
DLR= design load rate in mm/day

W= width in metres
If a daily design flow (Q) OF 840 I/day is adopted and given that the DLR is insert
30mm/day, as stated above, the reduired disposal area is as follows;
Area = 840/20
= 42.0 m2

Therefore it is considered that a maximum area of 42m2 of conventional absorption bed,
disposing of secondary treated effluent, will be required for effective effluent disposal of

Lots 8 and 9.

6.1 Effluent Disposal Bed Layout

Refer to Annexure B for the recommended effluent disposal bed layout over an
area of 3.25m wide and 13.0m length.

7, Conclusion

For Lots 8 and 9 the maximum disposal area that will 42 m2 per lot.

COLIN PYWELL
RPEQ 1003