36 0 10 20 30 DCP Blow Count ...... ...... I .... ...i.... b 0 10 20 30 40 50 60 70 0 5 10 15 20 25 30 DCP Blow Count DCP Blow Count 0 10 20 30 40 50 60 70 0 10 20 30 40 50 DCP Blow Count DCP Blow Count Fig. 4. DCP sounding data.