| Samples | Coarse sand (%) | Sand (%) | Fine sand (%) |
| BW-SM-01 | 8 | 35 | 57 |
| BW-SM-02 | 8 | 30 | 62 |
| BW-SM-03 | 7 | 28 | 65 |
| BW-SM-04 | 8 | 25 | 67 |
| BW-SM-05 | 7 | 26 | 68 |
| BW-SM-06 | 7 | 30 | 63 |
| BW-SM-07 | 6 | 25 | 69 |
| BW-SM-08 | 7 | 28 | 65 |
| BW-SM-09 | 8 | 26 | 66 |
| BW-SM-10 | 6 | 27 | 67 |
| BW-SM-11 | 6 | 28 | 66 |
| BW-SM-12 | 8 | 32 | 60 |