Earthwork Quality Control

Earthwork quality control guidelines are provided in Australian Standard AS 3798 “Guidelines on earthworks for commercial and residential developments”. The standard provides for two levels of commission of the Geotechnical Inspection and Testing  Authority (GITA).

Level 1 full supervision and testing and fill certification
Level 2 limited supervision (as specified) and testing

Civil Quality Assurance has a vast experience base in earthwork quality control and our quality system has well defined procedures in all aspects of AS 3798 requirements. Our Level 1 procedures include:

Pre-start Administration

• Acquisition of working documents
• Details of earthworks and works programming
• Contact details of relevant parties
• Confirmation of responsibilities

Fill Foundation Approvals

• Proof rolling and testing
• Sufficient removal of “root zone” material
• Defining and treatment of any soft/unsound/unsuitable areas

Supervision of Fill Placement

• Moisture control
• Material quality control
• Placement and layering requirements
• Compaction monitoring

Field and Laboratory Testing

• Field density testing (nuclear meter or sand replacement)
• Laboratory reference density

Documentation

• All test locations are three dimensional (all of our field staff are equipped and trained to take AHD levels on all test locations)
• All parties are kept informed on a daily basis with our “Daily Site Visit Reports”
• Photographic documentation
• Final report detailing all factual data and providing Level 1 (controlled fill) certification
• A summary (one page) report on each allotment for marketing and site re-classification purposes.