Certified onsite supervision for compliant backfilling
Level 1 Supervision provides continuous onsite oversight by a Sydney Water Certified technician during all backfilling activities. Required under specific conditions in the Sydney Water Technical Specification and Section 73 compliance process, this service ensures material is installed to the highest standards of compaction and structural integrity.
Our NATA-certified technicians verify material types, moisture content, and layer thicknesses before performing in-situ nuclear density compaction testing on each lift. Results are checked against project benchmarks (typically >98% Standard), and any inconsistencies are corrected immediately onsite.
All supervision is documented in a detailed Level 1 Compaction Report for submission to geotechnical engineers, builders, or Sydney Water. This process safeguards against future settlement, pipe movement, or infrastructure damage and meets stringent council and utility requirements.
Scope of Level 1 Supervision
- Continuous backfill monitoring above sewer and stormwater pipelines
- Verification of moisture content, material type, and lift thickness
- Compaction testing on every layer using approved methods
- Immediate remediation of non-compliant compaction results
Key Benefits
- Meets Sydney Water Section 73 and technical specification requirements
- Supports long-term structural performance and asset protection
- Provides NATA-certified reporting for compliance and handovers [Click here to view our certification.]
- Ensures quality from manhole to mainline
