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PERBEZAAN DOSH NIOSH DAN SOCSO

An Evaluation of Concrete Saw Blades for Noise Reduction

An Evaluation of Concrete Saw Blades for Noise Reduction Susan Shepherd ScD, M. Abbas Virji ScD and Susan Woskie PhD CIH University of Massachusetts Lowell This study was funded by the National Institute for Occupational Safety and Health (NIOSH) through a grant to the Center to Protect Workers Rights (CPWR) Noise exposure levels in construction Large equipment, but also hand held tools Concrete cutter: 105 dBA1 Cut-off saw: 98 – 102 dBA; peak: 118 dBA2 Gas saw, carbide blade: 95 dBA (5 ft.) est. source: 109 dBA3 1. Methner etal. JOEH 15(11), 2000 2. OSH Service, Dept of Labor, New Zealand, 2002 3. Greenspan etal, Appl Occ Env Hyg, 10(1), 1995 Hearing Loss in Construction 90% of SMW ages 50-59 lost >30dB @ 4k Hz (Byggahlsan study)1 49% of 5000 construction workers studied by Workers Comp Bd of BC1 1. Schneider etal STAR Construction Health & Safety, 1995 Experimental Methods Personal noise dosimeter (Larson Davis 706 Type 2) 3 Area noise dosimeters 1 Sound level meter (Larson Davis Type 1) with octave band analysis 5 saw blades Reinforced concrete pipe Each worker uses all five blades (wet and dry) Personal dust exposures (Thermo pDR w/cyclone)

An Evaluation of Concrete Saw Blades for Noise Reduction

Blade. 101 dBA. 100 dBA. Carbide Turbo. 105 dBA. 107 dBA. Carbide Regular. NA. 89 dBA. Saw motor only. (Stihl 400). Cutting concrete pipe. Free-running ...An Evaluation of Concrete Saw Blades for Noise Reduction Susan Shepherd ScD, M. Abbas Virji ScD and Susan Woskie PhD CIH University of Massachusetts Lowell This study was funded by the National Institute for Occupational Safety and Health (NIOSH) through a grant to the Center to Protect Workers Rights (CPWR)

SENSOR Occupational Lung Disease Bulletin

a comprehensive evaluation including medical, industrial. hygiene and toxicological ... Onset of symptoms occurred on average 10 months after. the individuals ... In this issue we present a cluster investigation prompted by a report to SENSOR that identified a new sensitizing agent. An astute pulmonologist identified a case of work-related asthma that he suspected was related to other cases being seen by his colleagues. A note written on the Confidential Report of Occupational Disease and Injury (http://www.state.ma.us/ dph/bhsre/ohsp/crodi.pdf) alerted OHSP to the cluster. OHSP received Technical Assistance from NIOSH, which performed a comprehensive evaluation including medical

HHE Report No. HETA-98-0291-2750, Safelite Auto Glass ...

NIOSH investigators conducted two site visits at Safelite facilities in Cincinnati, Ohio, on September 22, ... a 50-pound windshield yielded a LI of 2.3, indicating an increased ...

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