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In-depth survey report: control technology for small business: evaluation of a flexible duct ventilation system for radiator repair at A-1 Radiator, Reno, Nevada, report no. CT-172-11a.

Authors
Sheehy-JW; Cooper-TC; Hall-RM; Meier-RM
Source
NIOSH 1990 Feb; :1-33
NIOSHTIC No.
00194439
Abstract
An engineering control evaluation was conducted at a radiator repair shop which operated at a very high level of production. The shop had the potential for high exposures to lead (7439921) because of the high volume of work, the number of radiator repair stations, and repairs to huge radiators for mining equipment. Local exhaust ventilation which utilized adjustable arm elephant trunk exhaust hoods had been installed 18 months prior to the visit. The objective of this study was to evaluate the effectiveness of the local exhaust ventilation (LEV) system to control lead exposures during work operations. Time weighted average personal exposures for lead were at or below the OSHA permissible exposure level for ten of 15 mechanics during a high level of production. The elephant trunk ventilation system was capable of controlling lead fumes while shop doors were open, except at one tank in a corner. Work practices were found to be a source of excessive lead exposure. Emissions from a worker's own soldering and from soldering activity upwind of the worker were a major source of lead exposure. Collapse of flexible portions of ducts could reduce exhaust volume. Dampers also showed a tendency to close automatically.
Keywords
NIOSH-Author; NIOSH-Survey; Field-Study; CT-172-11A; Region-9; Control-technology; Lead-poisoning; Air-quality; Automobile-repair-shops; Mechanics; Ventilation-systems; Exhaust-ventilation
CAS No.
7439-92-1
Publication Date
19900201
Document Type
Control Technology; Field Studies
Fiscal Year
1990
NTIS Accession No.
PB91-107987
NTIS Price
A04
Identifying No.
CT-172-11A
Priority Area
Control-technology
SIC Code
7539
Source Name
National Institute for Occupational Safety and Health
State
OH
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