| Section 70.1 | Definitions | 
                
                
                  | Section 70.2 | Respirable dust standards | 
                
                
                  | Section 70.100 | Respirable dust standard when quartz is present | 
                
                
                  | Section 70.101 | Sampling; general and technical requirements | 
                
                
                  | Section 70.201 | Certified person; sampling | 
                
                
                  | Section 70.202 | Certified person; maintenance and calibration | 
                
                
                  | Section 70.203 | Approved sampling devices; maintenance and calibration | 
                
                
                  | Section 70.204 | Approved sampling devices; operation; air flowrate | 
                
                
                  | Section 70.205 | Bimonthly sampling; mechanized mining units | 
                
                
                  | Section 70.206 | Bimonthly sampling; designated areas | 
                
                
                  | Section 70.207 | Quarterly sampling; mechanized mining units | 
                
                
                  | Section 70.208 | Quarterly sampling; designated areas | 
                
                
                  | Section 70.209 | Respirable dust samples; transmission by operator | 
                
                
                  | Section 70.210 | Respirable dust samples; report to operator; posting | 
                
                
                  | Section 70.211 | Status change reports | 
                
                
                  | Section 70.212 | Exhaust Gas Monitoring | 
                
                
                  | Section 70.1900 | Scope |