Quaries | Dust emission (PM 2.5) between processes but same day | |||
Sunny day | Rainy day | |||
Crushing | Drilling | Crushing | Drilling | |
Stirling | 28 | 23 | 28 | 17 |
Ntake | 48 | 28 | 30 | 20 |
Seyani | 40 | 26 | 34 | 27 |
Halai | 43 | 30 | 27 | 21 |
Min | 28 | 23 | 27 | 17 |
Max | 48 | 30 | 34 | 27 |
Mean | 39.75 | 26.75 | 29.75 | 21.25 |
Stdev | 9 | 3 | 3 | 4 |
COV | 21 | 11 | 10 | 20 |
P-value | 0.028 | 0.017 |