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� �u . <br /> � !`� ' � <br /> 7.7 Frequency of Air Monitoring II <br /> 7.7.1 Exposure above the PEL: If the initial air monitoring found employees exposed <br /> to airborne lead above the PEL, additional exposure monitoring must be repeated � <br /> at least every three (3) months until two (2) consecutive samples taken at least ', <br /> seven(7)days apart are found below the PEL. ' <br /> 7.7.2 Exposure below the PEL but above the Action Level: If the initial air monitoring � <br /> found employees exposed to airborne lead below the PEL but above the Action <br /> Level, monitoring shall be repeated at least every six (6) months. If air- , <br /> monitoring results taken at least seven(7)days apart reveal that the airborne lead ' <br /> levels are below the Action Level, air monitoring may cease. , <br /> 7.7.3 Changes in Work Practices '� <br /> a. The Contractor shall conduct additional air monitoring if there are any � <br /> changes in the work processes, personnel, equipment, or the administrative ', <br /> and engineering controls. <br /> b. The written compliance plan shall be revised and additional air monitoring , <br /> initiated far all new or modified work practices. I <br /> 7.8 Notification of Air Monitoring Results <br /> 7.8.1 Employees shall be notified of air monitoring results in accordance with 29 CFR <br /> 1926. <br /> 7.8.2 The Contractor shall promptly notify the Railway of the air monitoring results. �I' <br /> 7.8.3 Complete air monitoring results shall be forwarded to the Railway's Manager �� <br /> Industrial Hygiene, 125 Spring Street, S.W.,Box 136,Atlanta, Georgia 30303. � <br /> 7.9 Administrative and Engineering Controls �� <br /> 7.9.1 The Contractor shall describe the administrative and engineering controls to be �' <br /> used in connection with each lead disturbing activity to minimize airborne lead <br /> exposure. <br /> 7.10 Respiratory Protection ', <br /> 7.10.1 All respiratory protection equipment shall meet NIOSH specifications. <br /> 7.10.2 Respiratory protection shall be worn when airborne lead exposure exceeds the ', <br /> OSHA PEL. <br /> 7.10.3 Selection of respiratory protection shall be guided by the following criteria: � <br /> 11 <br />