In-depth survey: preliminary evaluation of dust emissions - control technology for dowel-pin drilling at Minnich Manufacturing, Mansfield, Ohio.
Echt A; Mead KR; Farwick DR; Feng HA
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, EPHB 334-11a, 2008 Nov; :1-28
This study evaluated the performance of a commercially-available local exhaust ventilation engineering control used to reduce dust emissions from a dowel drilling machine. Compared with the use of no control during dowel drilling in concrete, the control significantly reduced respirable dust concentrations by 89% (p<0.0001) and significantly reduced respirable dust particle counts by 50 to 70% (p<0.0001). The particle size distribution of the dust emissions probably accounts for this discrepancy. Evaluations were conducted with and without a tent enclosing the dowel drilling machine. Results of the evaluations demonstrate the utility of using an enclosure to isolate a piece of construction equipment from the effects of its environment during a control evaluation. However, the use of this technique means that it would not be appropriate to compare the emissions measurements reported here to any exposure index. Recommendations that are expected to improve the effectiveness of the dust control are provided at the end of the report.
Region-5; Control-technology; Engineering-controls; Construction; Construction-equipment; Construction-industry; Machine-operation; Equipment-design; Respirable-dust; Dusts; Dust-collection; Dust-collectors; Dust-control; Dust-control-equipment; Control-equipment; Control-systems; Concretes; Road-construction; Road-surfacing; Testing-equipment; Silica-dusts; Quartz-dust; Air-sampling; Air-sampling-equipment; Sampling; Exposure-levels; Performance-capability; Air-flow; Drilling; Particle-counters; Particulate-dust; Exhaust-ventilation; Ventilation; Ventilation-systems; Emission-sources; Environmental-control-equipment
National Institute for Occupational Safety and Health, Division of Applied Research and Technology, Engineering and Physical Hazards Branch, Mail Stop R-5, 4676 Columbia Parkway, Cincinnati, OH 45226-1998
Field Studies; Control Technology
NTIS Accession No.
National Institute for Occupational Safety and Health