Present law provides that in all blasting operations the peak particle velocity on any one of three mutually perpendicular components of ground motion, transverse, vertical or longitudinal, may not exceed two inches per second at the location of any dwelling house, public building, school, church, commercial or institutional building normally occupied. For blast to structure distances greater than 300 feet, the standard table for maximum charge per delay must be generated by a formula contained in present law. Present law also contains a table to be used for determining weight of explosives to be used on a single delay period and a formula to be used for nontabulated distances of over 300. This bill adds that the above provisions do not prohibit a municipality with a population in excess of 100,000 (Clarksville, Chattanooga, Knoxville, Nashville, and Memphis) or a county with a population in excess of 200,000 (Hamilton, Knox, Shelby and Davidson) from adopting local blasting standards that are more stringent than the above requirements. However, any violation of the local standards may only be punished by means of a civil penalty of not more than $500 plus court costs. It should be noted that this bill does not amend TCA 68-105-110, which provides that the Tennessee Blasting Standards Act preempts all local regulation of subjects covered by the Act.