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

Colin Pywell Pty Ltd
Consulting Engineers
6 Castle Court
Tugun Qid, 4224

11 March 2007
Effluent Disposal Report

Proposed Subdivision of Lot 8 SP191680 (previously part of Lot 21 RP839106)
Laguna Street Boreen Point

1. Introduction

Bowler Geotechnical Report 3436 C Dated 22/5/04, Annexure C, investigated
the suitability of the above site for subdivision into 7 residential lots and ‘one balance
area’ being Lot 8, with respect to on site domestic waste water disposal; in accordance
with the requirements of the AS/NZ, 1547-2000 Standard. A current subdivision proposal
is.to subdivide Lot 8 into 2 lots of 2740m2 and 1660m2.

On 12/6/06 two additional permeability tests were carried out at positions
nominated as ‘effluent disposal’ areas on Murray & Associates Plan # 38411-le (see
Annexure A). The soil type and permeability are noted in Bowler Geotechnical
correspondence of 16/6/06 and 20/3/07 (see Annexure B).

2. Background and Site Description

Bowler Geotechnical carried out previous investigations and issued three
previous reports for the same site, which detailed the soil permeability and soil profile
for the proposed lots.

November 2002 - Job Report # 3436. Subdivision consisted of 8 proposed residential

lots and one proposed shopping village. Field investigations 13/11/02 comprised
permeability tests and bore logs.

December 2003- Job Report # 3436B. Subdivision consisting of 7 proposed residential
lots and one proposed shopping village. Field investigations 20/11/03 comprised
permeability tests. : . a - i ,
May 2004- Job Report # 3436C. Subdivision consisting of 7 proposed residential lots and
‘one balance area’.

All site and soil conditions relevant to this report have been assumed to be the
same as cited in the previous investigation reports, in which the homes were assumed to
have four bedrooms (6 occupants), and the water supply was from above ground rain
water tanks; no water saving fixture were allowed for.