Welding or cutting with arc or flame underground in other than fresh air, or in places where flammable gases are present or may enter the air current, shall be under the direct supervision of a qualified person who shall test for flammable gases before and frequently during such operations.
4 Va. Admin. Code § 25-40-5100
Statutory Authority
§§ 45.1-161.3 and 45.1-161.294 of the Code of Virginia.