The reflected wave is recorded at the pile head and interpreted for changes in impedance along the shaft. Cross-hole sonic logging, through tubes cast into the pile, gives a more detailed picture on larger piles.
Integrity tests check the quality of the pile; static and dynamic load tests check its capacity. Specifications set how many piles must be tested of each kind.
How Civova handles it
Civova records each pile test (integrity, static load, dynamic load or cross-hole) with its date and result against the pile it was carried out on.