| Length | Drilled hole interval | Initial point | Final point |
| 0.25 | 0.04 | 0.04 | 0.20 |
| 0.50 | 0.08 | 0.08 | 0.40 |
| 1.00 | 0.16 | 0.16 | 0.80 |
| 2.00 | 0.32 | 0.32 | 1.60 |
| 3.00 | 0.48 | 0.48 | 2.40 |