# Article 4 Ventilation, Mine Gases, and Other Hazardous Conditions

This article is comprised of the following sections:

- §45.2-826 Pre-shift examinations
- §45.2-827 On-shift examinations
- §45.2-828 Weekly examinations
- §45.2-829 Examinations of fans
- §45.2-830 Record of examinations
- §45.2-831 Notice of hazardous conditions
- §45.2-832 Notice of monitor tampering prohibition
- §45.2-833 Main fans
- §45.2-834 Fan stoppage plan
- §45.2-835 Auxiliary fans
- §45.2-836 Quantity of air
- §45.2-837 Bleeder systems
- §45.2-838 Coursing of air
- §45.2-839 Actions for excessive methane
- §45.2-840 Crosscuts
- §45.2-841 Permanent stoppings
- §45.2-842 Ventilation controls
- §45.2-843 Line brattice
- §45.2-844 Ventilation with air from certain areas
- §45.2-845 Worked-out areas
- §45.2-846 Air quality
- §45.2-847 Examination of mine for explosive gas and other hazardous conditions
- §45.2-848 Tampering with methane monitoring devices prohibited; penalty
- §45.2-849 Allowing persons to work in mine where methane monitoring equipment disconnected; penalty
- §45.2-850 Intentionally bypassing a safety device; prohibition
- §45.2-851 Control of coal dust
- §45.2-852 Rock dusting