This is how a hole for a memorial park using an excavator is done. We need at least PC 30 to reach 2.2 meters (7 ft). A PC 20 while cheaper can only dig 1.90 meters (6 ft) a one ft difference.
A good combination would be an excavator and mini dump truck. An excavator can fit into the dumptruck using a ramp or by excavator action only. The whole content of the dumpable materials can be loaded into the dump truck. And the excess into dumped into a certain section.
Or retain the trailers (4 for a small mp) and 8 for a abig mp..
Total volume to be escavatred; 2.4 x 2.2 x.0.9 = 4.752
Back fill volume.... 4.752 - Volume of vault - (1 meter x 2.4 x .0.8 ) 1.92 = 2.79 (less than 3 cubic meters
Thus we need at least a 3.0 cu meters mini dump truck for the backfill, with excess of almost 2 cubic meters for dumping elsewhere in the memorial park.
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