GEOLOGIC QUESTIONS ABOUT:

CAVITY OR VOID DETECTION

Where is the cave? Is the fill washed out behind the concrete? Is the floor slab supported by the engineered fill under it? Why did my building fall down? How do I detect karst?

Geophysical Solution:

GOOD METHOD: DC Resistivity (M-3)

BETTER METHOD:Cross Hole Seismic(M-7)

BEST METHOD: Ground Penetrating Radar(M-12)
Honorable Mention: Self Potential, Gravity