4 Va. Admin. Code § 25-40-895
If necessary to prevent damage, the director may specify lower allowable ground vibration and airblast levels than those provided by 4VAC25-40-880 and 4VAC25-40-890.
§§ 45.1-161.3, 45.1-161.294 and 45.1-161.305 of the Code of Virginia.
Derived from Virginia Register Volume 14, Issue 17, eff. July 1, 1998.