No internal-combustion engine shall be permitted on the surface within 50 feet of any mine opening.
EXCEPTION: This does not apply to self-propelled vehicles which are not operated as stationary equipment.
Cal. Code Regs. Tit. 8, § 7068
No internal-combustion engine shall be permitted on the surface within 50 feet of any mine opening.
EXCEPTION: This does not apply to self-propelled vehicles which are not operated as stationary equipment.
Cal. Code Regs. Tit. 8, § 7068