Protection, personal, during spray

The 2,4-D study was similar to the 2,4,5-T study which included analyses of air, patches and total urine. In this study three helicopter crews were monitored during their routine forest spray operations in Washington and Oregon. An additional objective in this study was to compare exposure from the routine operation (Tj) with that received when workers wore protective clothing and followed added precautions designed to limit exposure (T2). The Ti and T2 operations were conducted with the same individuals in each crew with a 1-week interval between spray operations. Each crew included a pilot, a batchman, a mechanic, a supervisor, and two observers. The observers were located from 67 to 168 m away from the spray operator. Their role was to represent persons who might be in the area, but who were not directly associated with the spray operation. Protective... 

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