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Abstract
Airborne concentrations of diazinon were measured in rooms for 21 days after crack and crevice application. Residue levels were largest in treated rooms (38 μg/m3 ) after application, followed by adjacent (1 μg/m3 ) and upper and lower rooms (ca. 0.4 μg/m ). Low levels of diazinon were detected in all rooms 21 days after application. Small amounts of diazinon (corrected to an 8 min application period) were detected on respirator pads ( 2.6 μg) and waist pads (2.3 μg) worn by the applicator.