Specifications include, but are not limited to: Structural Abrasive Blasting: Structural abrasive blasting involves the removal of rust, scale, and old paint from metal surfaces on bridges prior to repainting. The following measures will be considered RACM for these operations. An enclosure shall be erected to completely surround the blasting operation. This includes the area around and underneath the operation. The ground cannot be used as the bottom of the enclosure unless completely covered with plastic sheeting or a tarpaulin. The enclosure shall be constructed of flexible material such as tarpaulins or containment screens which are specifically designed for this purpose, or of rigid materials such as plywood. All materials shall be maintained free of tears, cuts, or holes. However, flexible material used for the sides of the enclosure may be woven to contain a maximum of 15% holes and a minimum of 85% material. All seams shall be overlapped a minimum of 6" and fastened together at least at 12" intervals. The vertical sides of the enclosure shall extend completely up to the bottom of the deck on a steel beam bridge and up to at least the elevation of the blasting operation on a truss bridge. Bulkheads shall be used between beams to enclose the blasting area. All debris which has been collected by this operation or which has fallen to the ground shall be' collected and stored at the bridge site for testing, evaluation and disposal. Collection and storage services of an approved testing laboratory shall be obtained to evaluate a representative sample of the abrasive blasting debris (from each bridge) for the Toxic Characteristic Leaching Procedure (TCLP) Test. Sampling shall be done within the first week of the abrasive blasting. All sampling and testing shall be done in accordance with U.S. EPA Publication SW8 846. The test results of exceedances shall immediately be forwarded to the local air agency or Ohio EPA District Office in whose jurisdiction the blasting project is taking place.
