Citation:

Moore, J., J. Dukes, J. Clark, J. Malone, C. Hallman, AND P. Hester. DOWNWIND DRAFT AND DEPOSITION OF MALATHION ON HUMAN TARGETS FROM GROUND ULTRA-LOW-VOLUME MOSQUITO SPRAYS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/015 (NTIS PB94140654), 1993.

Description:

Malathion concentrations were measured at selected positions on live, stationary human subjects wearing protective clothing. ubjects stood at 7.6 m (25 ft) or 15.2 m (50 ft) downwind of the spray vehicle, and another jogged in the direction of the spray vehicle downwind of the spray, approximately 1.5 m (5 ft) from the vehicle path. sing nonparametric statistical analyses, we found no significant differences (a=0.05) in amount ot malathion deposited on subjects located at these distances from the spray vehicle. uring the last four sprays, average amounts of malathion deposited on the ground level at 15.2 m, 30.4 m and 91.2 m (50 ft, 100 ft, and 300 ft, respectively) were compared, using nonparametric statistical analyses and were not significantly different (a=0.05). From malathion residues measured on human subjects, at different locations we estimated dermal exposure for people with varying amounts of exposed skin. hese estimates wee compared to the acute LD50 value (4100 mg/kg) for a 70 kg (150 lb) adult male. ll calculated dermal exposures to malathion in our studies were less than the acute lethal dose for a human subject by four orders of magnitude.

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