Attachment J - Sewage Treatment Assessment

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O09 Oct 2006 9:34AM GKS Maintenance P¢L 0755762055 P

   

Rept No. Assess050614 Page 2of 2

 

LAND APPLICATION METHOD: -
it is proposed that disposal be by shallow sub surface drip irrigation in the defined area..see site

plan & cross section... ( pressure compensating drippers ).
CALCULATION OF DISPOSAL AREA:
For 8 permeability 0.14 m/day. DIR = 25 mm/week. (AS1547-2000...Table 4.244)

Hydrantic loading = 4000 Vday = 28, 000 lAweek (Qw)
Are of irrigation required Ai= =
. = 12128000...
25 4 .
Area of irrigation required = 1120.m2 ( 44.8 mx 25 m area ).

SCOPE OF WORK: Réwards and Associates have been commissioned to design an appropriate effluent disposal aysiem for tis
property and for the nominated use. Insta ond ongoing maintenance of the system is (ha responsipiisty of olners

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lation EON

  

Soil Category Indicative Drainage Soil Texture Indicative Permeability

 

 

1 Rapid draining Gravels & sands >3.0
2 Free Draining Sandy Loams >3.0
Good. to Moderate 1.4—3.0

 

 

3 . Good to Moderate . Loams 16-3.
‘ laderate to slow B.5—-15

  

 

 

 

Moderate to slow 0.5—1.5

4 Slow to poor Clay Loams 0.12 -0.5
Poor. 9.06812
Slow to poor 012-05 .

5 Poor Light Clays 0.06 — 0.12
Very Poor <0,06
Poor. . . 0.06 ~ 0.5

6 Very poor Medium to heavy clays < 0.06

: Very poor : < 0.06

 

’ Note: This report fs to be read in conjunction with the standard conditions of permit as
Issued by the Local Authority,

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