This is not a correct concept. If there is only non-toxic particles in your working environment, you should not use the active carbon masks. A active carbon mask is as same as a particulate mask except the addition of the active carbon pre-filter. However, active carbon pre-filter is used to adsorb the organic vapors or bad odors and has nothing to do with the particle filtration. Therefore, you don't have to use the active carbon mask unless there is toxic particle, organic vapor, or bad odors in your working environment.