Asbestos Safety Manual

26 Asbestos Safety Manual Environmental Health and Safety Exposure Monitoring EH&S monitors asbestos abatement projects to quantify exposure levels to ensure that employees are not exposed to airborne asbestos fiber concentrations in excess of the OSHA Permissible Exposure Limit (PEL) of 0.1 fibers per cubic centimeter (f/cc) over an 8-hour time-weighted average (TWA) or 1.0 f/cc for a 30-minute, shortterm excursion limit (STEL), as determined by NIOSH Method 7400. University abatement personnel and contracted abatement workers are notified of these monitoring results in accordance with OSHA regulatory requirements. Ambient and Clearance Air Testing EH&S periodically collects ambient air samples to evaluate the potential hazards posed by asbestos to building occupants and to ensure that asbestos fibers have not been released from the regulated work area during asbestos abatement projects. Following abatement activities and successful completion of a visual inspection of the work area, EH&S will conduct clearance air testing to determine that the area is documented safe for re-occupancy. All clearance testing samples must indicate fiber concentrations of 0.01 f/cc or lower, with a 95% upper confidence limit for release of the work area. Areas exceeding clearance testing limits will be re-cleaned and re-tested until satisfactory levels are measured. Personal air monitor High flow air testing equipment