Shots or rounds shall not be fired in places where flammable gas can be detected with a permissible flame safety lamp, or where 1.0% or more of flammable gas can be detected by any other MSHA approved device or method, at a point not less than 12 inches from the back, face and rib. See Article 4 (4VAC25-40-3325 et seq.) of this part for blasting requirements.
4 Va. Admin. Code § 25-40-5710
Statutory Authority
§§ 45.1-161.3, 45.1-161.294 and 45.1-161.305 of the Code of Virginia.