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In-depth survey report: engineering control and process evaluation at Quaker Oats, Cedar Rapids, Iowa.

Garcia-A; Hirst-DVL; Curwin-BD
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-322-14a, 2012 Apr; :1-34
Researchers from the Centers for Disease Control and Prevention (CDC), National Institute for Occupational Safety and Health (NIOSH) conducted an engineering control evaluation at Cedar Rapids, Iowa Quaker Oats, a producer of cereal and other grain mill products, to: evaluate their manufacturing processes regarding potential exposure to diacetyl and other food related flavorings; document the effectiveness of existing exposure control techniques; and identify areas where engineering controls may need to be developed or improved. A separate NIOSH team of industrial hygienists conducted an exposure assessment at this facility; these results are included in a separate report. Personal sampling (from the exposure assessment study) and a ventilation assessment were conducted to evaluate potential risks during various tasks monitored during the engineering control survey. In general, measured diacetyl concentrations at the Cedar Rapids, Iowa, Quaker Oats facility were below the proposed NIOSH Recommended Exposure Limit (REL), with the exception of the Syrup room on the 5th floor. Samples collected in this room had levels of diacetyl above the proposed NIOSH time weighted average (TWA) of 5 parts per billion (ppb) and Short Term Exposure Limit (STEL) of 25 ppb. This room also had concentrations of 2,3-pentanedione above the proposed NIOSH REL for 2,3-pentanedione of 9.3 ppb. Real-time HazDust IV mean dust concentrations for all the evaluated tasks were below the respirable dust PEL of 5 mg/m3. However, because the HazDust IV is a non-specific instrument calibrated to a reference standard, the reported concentrations are relative, and there is some uncertainty regarding actual dust exposure concentrations. It may respond differently to dusts with optical properties different from Arizona Road Dust. Therefore, general and task-specific recommendations are included to control and reduce both diacetyl and dust exposures.
Region-7; Control-technology; Engineering-controls; Employee-exposure; Exposure-assessment; Food-processing-industry; Food-processing-workers; Food-additives; Milling-industry; Industrial-engineering; Chemical-processing; Sampling; Ventilation; Control-systems; Task-performance; Permissible-concentration-limits; Exposure-levels; Exposure-limits; Time-weighted-average-exposure; Short-term-exposure; Grain-dusts; Dust-control; Dust-exposure; Dust-sampling
431-03-8; 600-14-6
Publication Date
Document Type
Field Studies; Control Technology
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
EPHB-322-14a; B07182012
NIOSH Division
SIC Code
Source Name
National Institute for Occupational Safety and Health