| Sampling career | Naming of samples | Fineness module (FM) | Proportions of sand collected (%) | Proportion of corrective sand (%) | Fineness module, aimed |
| Bandjoun-Djione | B1 | 3.55 | 44.76 | 55.24 |
2.6 |
| B2 | 1.83 | / | / | ||
| Djengou | D1 | 3.93 | 36.66 | 63.34 | |
| D2 | 3.08 | 61.60 | 38.4 | ||
| Hiala | H1 | 2.8 | 79.38 | 20.62 | |
| H2 | 3.33 | 51.3 | 48.7 | ||
| La’gou I | L1 | 3.80 | 39.0 | 61.0 | |
| L2 | 2.50 | / | / |