Yes, blasting is legal and a necessary aid in the removal of rock on construction sites and for the installation of utilities. Blasting is a heavily regulated industry that requires a Permit from the local Fire Department.
Through the Department of Fire Services, the Office of the State Fire Marshal issues "Blasting Certificates of Competency and Explosive Users Certificates" to blasters and blasting companies.
The Marlborough Fire Department does not issue a blasting permit unless these documents are presented. These documents represent that the blaster is considered competent to conduct blasting operations, and that his company has shown evidence of bonding and required insurance respectively.