06/1168 - Change a Development Approval [As Published] · 132006.1168.02

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company. The units are to be delivered and installed undamaged in accordance with the manufacturer's
recommendations and as shown on the design drawings.

§.11.2 Cast In Situ

Where necessary, localised excavations shall be carried out to allow construction of cast in situ end
structures.

Cast in situ endwalls, wingwalls and aprons shall be constructed to the dimensions and other
requirements shown on the Design Drawings.

Concrete work shall comply with the requirements specified in Section 6 - Concrete Work. Construction
of endwalls and wingwalls shall include the construction of integral cutoff walls, where required.

5.12 Gross Pollutant Traps

Gross pollutant traps are to be built according to the manufacturer’s specifications and are to meet
Australian and New Zealand Environment Conservation Council (ANZECC) guidelines.

The gross pollutant traps shall be built to accommodate pipes and pipe grades as shown on the
drawings.

Gross pollutant traps shall comply with the following technical requirements:

 

Capture of gross pollutant > 3mm 98%

 

Capture of gross pollutant > 0.211mm 98%

 

Collection of free oil and grease at design flow 97%

 

Treatable flow rate for structure E7/2 0.299m*/s (1 in 20 year event)

 

Treatable flow rate for structure E7/5 0.182m*/s (1 in 20 year event)

 

 

 

 

5.13 Geometric Tolerances

The tolerances for the construction of Stormwater Drainage Works shall comply with the following:

 

 

 

Invert Levels + 10mm - 10mm
Surface Levels + 50mm - 50mm
Structure Locations within 100mm of design on the site

within 50mm of design longitudinally along roadway

within 10mm of design at right angles to road centreline

 

Crest and Spillways of Detention Basins | shall be trimmed to + 10mm, - 10mm of design

 

 

 

41/22382/11840 Girraween Sports Precinct 34
Earthworks Package