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In-depth survey report: control technology for agricultural environmental enclosures at John Deere Manufacturing Co., Inc., Waterloo, Iowa, report no. CT-223-13a.

Authors
Hall-RM; Heitbrink-W
Source
NIOSH 1997 Jul; :1-39
NIOSHTIC No.
00238172
Abstract
The effectiveness of agricultural cabs in protecting workers from pesticides and other air contaminants was evaluated at John Deere Manufacturing Co., Inc. The laboratory and field evaluation were performed on a John Deere 7000 series tractor cab equipped with a High Efficiency Particulate Air filter inside the fresh air filter housing. The cab was equipped with standard recirculation filters inside. The measurements taken indicated that the cab was more than 99% efficient at removing aerosols larger than 3.0 micrometers in diameter. Protection factors are greater than 100 for particles larger than 1.41 micrometers during field evaluations. During the laboratory evaluation protection factors were greater than 100 for particles larger than 0.75 micrometers. The cab provided a mean protection factor of 38 and 43 during laboratory and field evaluations, respectively, for aerosols smaller than 1.0 micrometer in diameter. Some leakage of small particles into the cab was suspected. The cab remained under positive pressure during both the evaluations at approximately 0.75 inches of water. Any leakage that may be occurring is likely coming around the seams used to hold the filters in place in the ventilation system.
Keywords
NIOSH-Author; NIOSH-Survey; Field-Study; CT-223-13a; Region-7; Control-technology; Agricultural-industry; Agricultural-machinery; Air-quality; Ventilation-systems
Publication Date
19970701
Document Type
Control Technology; Field Studies
Fiscal Year
1997
NTIS Accession No.
PB97-206288
NTIS Price
A04
Identifying No.
CT-223-13a
Priority Area
Control-technology
Source Name
National Institute for Occupational Safety and Health
State
ME; OH
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