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Summary of recommended installation methods
Link to this table.
Jurisdiction | Guideline on lifts | Guideline on compaction |
---|---|---|
Prince George’s County, (2007) | 200 to 300 mm lifts | Natural compaction with light watering |
ARC TP10 (2003) | 300 to 400 mm lifts | Loose compaction by light tamping with backhoe bucket |
North Shore City Council (2009) | 300 mm lifts | Natural compaction with wetting of soil |
Melbourne (FAWB 2009b) | Two lifts if depth is over 500 mm | Light compaction; single pass with vibrating plate for small systems; single pass with roller for large systems |
Seattle Public Utilities (2008) | Loose lifts | Compact to 85 to 90% of modified maximum dry density |
California Stormwater (CASQA 2003) | 460 mm or greater lifts | Light compaction |