Assessment of Silica Exposure and Engineering Controls During Tuckpointing

2003 ◽  
Vol 18 (12) ◽  
pp. 977-984 ◽  
Author(s):  
Shojiro Yasui ◽  
Pam Susi ◽  
Mike McClean ◽  
Mike Flynn
Keyword(s):  
Engineering Controls ◽  
Silica Exposure

Understanding the risks and rewards of using 50% vs. 10% strength peroxide in pulp bleach plants

TAPPI Journal ◽  
2018 ◽  
Vol 17 (11) ◽  
pp. 601-607
Author(s):  
Alan Rudie ◽  
Peter Hart
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Rate ◽  
The Other ◽  
Mechanical Pulp ◽  
Engineering Controls ◽  
Point Of Use ◽  
Process Failure

The use of 50% concentration and 10% concentration hydrogen peroxide were evaluated for chemical and mechanical pulp bleach plants at storage and at point of use. Several dangerous occurrences have been documented when the supply of 50% peroxide going into the pulping process was not stopped during a process failure. Startup conditions and leaking block valves during maintenance outages have also contributed to explosions. Although hazardous events have occurred, 50% peroxide can be stored safely with proper precautions and engineering controls. For point of use in a chemical bleach plant, it is recommended to dilute the peroxide to 10% prior to application, because risk does not outweigh the benefit. For point of use in a mechanical bleach plant, it is recommended to use 50% peroxide going into a bleach liquor mixing system that includes the other chemicals used to maintain the brightening reaction rate. When 50% peroxide is used, it is critical that proper engineering controls are used to mitigate any risks.

scholarly journals A standardized protocol for the comprehensive assessment of dental hygiene work

Work ◽  
2021 ◽  
pp. 1-12
Author(s):  
Shawn C. Roll ◽  
Mark E. Hardison ◽  
Jane L. Forrest ◽  
Nikki L. Colclazier ◽  
Joyce Y. Sumi ◽  
...  
Keyword(s):  
Dental Hygiene ◽  
Dental Hygienists ◽  
Engineering Controls ◽  
Work Related ◽  
Coding Scheme ◽  
Video Acquisition ◽  
Standardized Protocol ◽  
Work Related Musculoskeletal Disorders ◽  
And Performance ◽  
Observation Protocol

BACKGROUND: Work-related musculoskeletal disorders are prevalent in dental hygienists. Although engineering controls and ergonomic training is available, it is unclear why this intransigent problem continues. One possible barrier is that a comprehensive, standardized protocol for evaluating dental hygiene work does not exist. OBJECTIVE: This study aimed to generate a valid and reliable observational protocol for the assessment of dental hygiene work. METHODS: An iterative process was used to establish and refine an ecologically valid video acquisition and observation protocol to assess key activities, tasks, and performance components of dental hygiene work. RESULTS: Good inter-rater reliability was achieved across all variables when the final coding scheme was completed by three independent raters. CONCLUSIONS: This work provides an exemplar of the process required to generate a comprehensive protocol for evaluating the work components of a particular job, and provides standardized nomenclature for use by scientists and practitioners interested in understanding and addressing the pervasive issue of work-related disorders in dental hygienists.

Efficacy of Engineering Controls in Reducing Occupational Exposure to Aerosolized Pentamidine

CHEST Journal ◽  
1992 ◽  
Vol 102 (6) ◽  
pp. 1764-1766 ◽  
Author(s):  
Melissa A. McDiarmid ◽  
John Schaefer ◽  
Cindy Lynn Richard ◽  
Richard E. Chaisson ◽  
Byron S. Tepper
Keyword(s):  
Occupational Exposure ◽  
Engineering Controls ◽  
Aerosolized Pentamidine
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