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In-depth survey report: assisting furniture strippers in reducing the risk from methylene chloride stripping formulations at Sunset Strip, Inc., Huntington Beach, California, report no. CT-170-22a.

Authors
Jones-JH; Estill-CF; Kurimo-RW; Kovein-RJ; Watkins-DS; Shaw-PB
Source
NIOSH 2002 May; :1-16
NIOSHTIC No.
20022449
Abstract
The National Institute for Occupational Safety and Health (NIOSH) has conducted research on ventilation controls for reducing furniture stripping methylene chloride exposures to the OSHA PEL of 25 ppm. Low cost ventilation systems were designed by NIOSH researchers along with Benny Bixenman of Benco Sales, Inc. (Cookville, Tennessee). The controls were constructed and installed by Benco Sales. The controls consisted of enclosing and attaching local exhaust systems to the stripping tank and the rinsing booth and adding an air shower at the stripping booth. This survey tested four control combinations using new ventilation: 1) worker A with an air shower, 2) worker A without an air shower, 3) worker B with an air shower, and 4) worker B without an air shower. During each test, sorbent tube sampling and real-time sampling were employed. Sorbent tube data collected in the worker's breathing zone ranged from 11 to 53 ppm. Passive monitor data results were similar. A statistical difference in breathing zone exposure was found between workers (p=0.0001), with worker A having the lowest exposures. No statistical difference in breathing zone exposures was found for the two air shower conditions; therefore, more data are needed to determine ability of the air shower to lower exposures. Breathing zone exposures (95% confidence limits) for worker A, with or without the air shower, were lower than the OSHA PEL of 25 ppm. Differences between the workers are believed to be related to work practices. The goal of reducing methylene chloride exposures to the new OSHA standard of 25 ppm was achieved only for the case of the more experienced worker (worker A) while using the air shower. Exposure results are statistically different between workers. Additionally, use of the air shower resulted in only slightly lower exposures, with no statistical difference. Therefore, more data are needed to determine ability of air shower to lower exposures. Passive monitors results were similar to the sorbent sampling results and are recommended as an alternative sampling method for sampling short time periods. Other workers who are not stripping furniture but who are working in the shop should meet the 12.5 ppm OSHA action level.
Keywords
Furniture-industry; Furniture-workers; Paint-removers; Solvent-vapors; Solvents; Small-businesses; Sampling; Exhaust-systems; Equipment-design; Exposure-limits; Engineering-controls; Environmental-control-equipment; Ventilation; Breathing-zone; Sampling-equipment; Region-9; Work-practices; Control-technology
CAS No.
75-09-2
Publication Date
20020530
Document Type
Field Studies; Control Technology
Fiscal Year
2002
NTIS Accession No.
PB2003-100578
NTIS Price
A04
Identifying No.
CT-170-22a
NIOSH Division
DART
SIC Code
7641
Source Name
National Institute for Occupational Safety and Health
State
CA; OH
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