Concentration and movement of diazinon in air.

Airborne concentrations of diazinon were measured in rooms for 21 days after crack and crevice application. Residue levels were largest in treated rooms (38 micrograms/m3) after application, followed by adjacent (1 microgram/m3) and upper and lower rooms (ca. 0.4 microgram/m3). 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 microgram) and waist pads (2.3 microgram) worn by the applicator.