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Main Title Transport of lawn-applied 2,4-D from turf to home : assessing the relative importance of transport mechanisms and exposure pathways /
Author Nishioka, M. G. ; Burkholder, H. M. ; Brinkman, M. C. ; Hines, C.
Other Authors
Author Title of a Work
Nishioka, Marcia G.
CORP Author Battelle Memorial Inst., Columbus, OH.;Environmental Protection Agency, Research Triangle Park, NC. National Exposure Research Lab.
Publisher U.S. Environmental Protection Agency, National Exposure Research Laboratory,
Year Published 1999
Report Number EPA/600/R-99/040; EPA-R-822082
Stock Number PB99-156358
Subjects Indoor air pollution--United States ; Dichlorophenoxyacetic acid
Additional Subjects 2-4-dichlorophenoxyacetic acid ; Pesticide residues ; Environmental transport ; Environmental exposure pathway ; Turf ; Soils ; Dust ; Shoes ; Herbicides ; Sampling ; Houses ; Indoor air pollution ; Particle size ; Sprays ; Volatility ; Pesticide drift ; Foliar application ; Carpeting ; Urinalaysis ; Children ; Polyurethane foam ; Vacuum cleaners
Library Call Number Additional Info Location Last
NTIS  PB99-156358 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 142 pages : illustrations, tables ; 28 cm
Methods have been developed to estimate children's residential exposures to pesticide residues and applied in a small field study of indoor exposures resulting from the intrusion of lawn-applied herbicide into the home. Transport of 2,4-D from the residential lawn into the home was measured following both homeowner and commercial application of this herbicide. Sampling methods included particle size-selective indoor air sampling; wipe sampling of floors, sills, tables; the polyurethane foam (PUF) roller for dislodgeable carpet surface residues; and the HVS3 vacuum sampler for floor dust. Personal exposure samples included hand wipes and morning void urine samples. Pesticide spray drift was found to result in only a relatively minor increase in indoor pesticide levels. Post-application air intrusion from closed house ventilation and the opening and closing of doors and windows increased indoor background levels 6-fold, while track-in by high activity children and pets, and wearing shoes indoors, increasing indoor levels by 37-fold. Indoor 2,4-D levels were found to increase continually over a one-week period, with the increase in indoor air levels corresponding to the increased floor dust levels, suggesting resuspension of house dust by human activity. Similar estimates of non-dietary exposure are obtained from models based on 100 mg dust by human activity. Similar estimates of non-dietary exposure are obtained from models based on 100 mg dust ingestion and surface contact simulated by the PUF roller.
Prepared by Marcia G. Nishioka, et al ... /Battelle. Prepared for U.S. EPA National Exposure Research Laboratory. "Cooperative Agreement CR-822082." "March 1999." Includes bibliographical references. Microfiche.