From [UT]: To:
| PM_3dL | Concentration of particles >= 0.3 um in 0.1 L air |
| PM_5dL | Concentration of particles >= 0.5 um in 0.1 L air |
| PM1dL | Concentration of particles >= 1.0 um in 0.1 L air |
| PM2_5dL | Concentration of particles >= 2.5 um in 0.1 L air |
| PM5dL | Concentration of particles >= 5.0 um in 0.1 L air |
| PM10dL | Concentration of particles >= 10 um in 0.1 L air |