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® 4. Dust Control Typical dust control mitigation practices require the regular use of a water truck. ® Where high levels of dust and particulates may be generated from excavation, drilling or earth moving operations, a dust control program, sometimes including fugitive dust ® monitoring and sampling, is typically required. ® 5. Respiratory Protection Program ® A written respiratory protection program is a legal requirement where it is necessary ® to employ the use of respiratory protection equipment. Requirements for a minimal ® acceptable program can be found at 29 CFR 1910.134 (b). The elements of a good ® program are: ® 1. Use of engineering controls wherever.possible. _.. ® 2. Hazard identification and assessment. ® 3. Written standard operating procedures. ® 4. Employee training. ® 5. Periodic medical assessment of employees and approval for respirator fitting ® and use. • 6. Appropriate respirator selection for a specific job. ® 7. Proper qualitative fitting of respirators to personnel. ® 8. Maintenance and storage of respiratory protection equipment. 9. Periodic reevaluation of the program. ® Persons involved in the administration of a program should be thoroughly familiar with ® such concepts as the protection factor (PF) of the air purifying respirators (APRs) used, the Maximum Use Concentration (MUC) of the APRs, determination of the Maximum Use Limitation (MUL) of a respirator, Permissible Exposure Limits (PELs), ® Threshold Limit Values (TLVs), and the levels Immediately Dangerous to Life and ® Health (IDLHs), as well as other concepts such as warning properties and respirator ® filter breakthrough_ Specific regulatory requirements for respiratory protection are delineated in CFR 29, ® Part 1910.134, for general industry and 29 CFR 1926.103 for the construction ® industry_ Federal OSHA PELs are found in 29 CFR 1910.1000 Subpart Z. The PELs ® 1.5