5607.2.1.1 Assessment of existing conditions.
FC § 5607.2.1.1
The pre-blasting survey shall assess and document the existing conditions of the interior and exterior of affected buildings, structures and infrastructure, provided that if, after reasonable good faith efforts, access to the interior of a building, structure or infrastructure cannot be obtained, it shall be sufficient that such survey assess and document the condition of the exterior of such building, structure or infrastructure. The pre-blasting survey report shall include photographs and/or videos, documenting any pre-existing conditions that may be exacerbated by blasting operations, including cracks and structural defects, and their location, length, size, thickness, and type. The report shall also specify the type of structural system of each affected building in a sufficient manner to allow the professional engineer to recommend the appropriate vibration limits, subject to department approval, not to exceed the limits set forth in FC 5607.19.1. The professional engineer shall also specify whether use of the global strain method in accordance with FC 5607.19.1 is recommended for each affected building. Where the professional engineer determines that a building has potentially unsafe conditions or conditions that might become potentially unsafe as a result of blasting operations, blasting operations shall not proceed before mitigation procedures are performed in accordance with FC 5607.9.6 and as may be otherwise required by the department.
