Article 3 - Air Quality, Radiation and Physical Agents
- Section 4VAC25-40-3160 - Oxygen content in mines
- Section 4VAC25-40-3170 - Ventilation
- Section 4VAC25-40-3180 - Fan housings and air ducts
- Section 4VAC25-40-3190 - Air intakes and returns
- Section 4VAC25-40-3200 - Air current effectiveness
- Section 4VAC25-40-3210 - Fan maintenance
- Section 4VAC25-40-3220 - Mine atmosphere test instruments
- Section 4VAC25-40-3230 - Repealed
- Section 4VAC25-40-3240 - Access to inadequately ventilated areas
- Section 4VAC25-40-3250 - Installation of ventilation tubing
- Section 4VAC25-40-3260 - Ventilation door operation
- Section 4VAC25-40-3270 - Requirements for ventilation doors
- Section 4VAC25-40-3280 - Ventilation door closing
- Section 4VAC25-40-3290 - Sampling for radon gas
- Section 4VAC25-40-3300 - Maximum annual exposure
- Section 4VAC25-40-3310 - Maximum concentrations
- Section 4VAC25-40-3320 - Changes in permissible exposures