3.3 Contribution of PM10The daily contributions of PM10 were significant and variables for each of the stations (Figure 4). The modeling showed that 13.8% of the environmental concentration recorded in Provincial station is directly influenced by activities related to the storage of coal, while, in other areas studied the influence was lower: Casitas: 3.43%, Patilla: 3.08% and Hatonuevo: 2.24%. Was not presented contribution by the activities of storage in piles of coal in the station Vivienda, indicating that in the period of study was not recorded inversion of wind. The factor wind direction, was determinant for the contribution in receptors, its frequency during the time of it modeling was NEE.