The Washington Aerial Spray Drift Study: Assessment of Off-Target Organophosphorus Insecticide Atmospheric Movement by Plant Surface Volatilization

Details

• Personal Author:
  Eigethuna K ; Felsot A ; Fenskea AR ; Hebertb RV ; Ramaprasada J ; Tsaia YM ; Yosta GM
• Description:
  Post-application pesticide emissions from wetted leaf surfaces and soil may present a significant pathway of exposure to humans in nearby residential communities. In this study, high volume air sampling was performed to measure airborne concentrations of the pesticide methamidophos in a residential community in close proximity to aerial spraying. Sampling occurred before, during and 24 h post-application. To evaluate whether predictive models could reliably estimate residential exposure to methamidophos, an emission factor was used for estimating fluxes of volatilized material over the sprayed area for a I-day post-application period. These flux estimates were then incorporated into a fugitive dust gaussian dispersion model (FDM) for assessing distribution of mass around the sprayed area. The predictive model output was compared with the field air sampler measurements. In our comparison, I-day flux estimates from the model were found to be associated to observed field measurement data, with an r2 = 0.63 the day of the spray and r2 = 0.67 the day after the spray. The volatilization model however appears to underestimate surface emission flux immediately after the spray and overestimate the emission the next day. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution, Indoor Environmental Monitoring Insecticides Occupational Health Safety
• Keywords:
  Air-contamination Air-monitoring Air-sampling Air-sampling-equipment Emission-sources Exposure-levels Insecticide-poisoning Pesticides Soil-sampling
• ISSN:
  1352-2310
• Document Type:
  Text
• Funding:
  Cooperative Agreement
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 10 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  38
• Issue:
  33
• NIOSHTIC Number:
  nn:20032188
• Citation:
  Atmos Environ 2004 Oct; 38(33):5703-5713
• Contact Point Address:
  Jaya Ramaprasad, Department of Environmental and Occupational Health Sciences. School of Public Health. University of Washington, Box 357234. Seattle, WA 98195-7234
• CAS Registry Number:
  Methamidophos (CAS RN 10265-92-6)
• Federal Fiscal Year:
  2005
• Performing Organization:
  University of Washington
• Peer Reviewed:
  True
• Start Date:
  20010930
• Source Full Name:
  Atmospheric Environment
• End Date:
  20270929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:09e0efbaf123be686d4defbe751a470d0abb4f2b300e3a2bb0ee369191bc9615e603ad2b028ce69a454340af9e1ced4093d120fc8e391ada3a2e7742e29fbb24
• Download URL:
  https://stacks.cdc.gov/view/cdc/186229/cdc_186229_DS1.pdf
• File Type:
  [PDF - 247.45 KB ]