Dichlorvos (DDVP) Risk Characterization Document - California ...

USDA 1991 Total Diet Study (FDA, 1992). USEPA estimates of chronic exposure are also in Table 18
and were 1/4 to 1/2 fold of those by DPR.
Commodity contribution analysis was conducted to determine the critical commodities in the
determination of total exposure (Table 19). Residues in cereal grains (28.2-30.9% of total exposure)
and dairy products (25.4 to 51.25) were the major contributors toward the exposure levels of U.S.
population, non-nursing, and children population subgroups.
Lifetime Exposure
The potential lifetime exposure to DDVP was evaluated based on the chronic dietary DDVP level of
0.22 ug/kg-day (DPR) and 0.036 ug/kg-day (USEPA) for the US population (Table 18).
Table 18. Potential acute and chronic dietary exposures to DDVP a .
DPR DPR USEPA
Acute exposure Chronic exposure Chronic exposure
95th percentile of annual average annual average
Population subgroups exposure (ug/kg-day) (ug/kg-day) (ug/kg-day)
US Population, all seasons 0.91 0.22 0.036
Western Region 0.88 0.22 0.038
Hispanics 1.00 0.24 0.038
Non-Hispanic Whites 0.87 0.22 0.036
Non-Hispanic Blacks 1.04 0.26 0.031
Non-Hispanic Other 1.13 0.28 0.035
Infants (nursing, < 1 year) 0.62 0.06 0.019
Infants (non-nursing, < 1 year) 1.44 0.24 0.063
Children (1-6 years) 1.65 0.53 0.076
Children (7-12 years) 1.15 0.35 0.053
Females (13-19 years) 0.64 0.20 0.030
(not pregnant, not nursing)
Females (13+ years) 0.51 0.17 0.027
(pregnant, not nursing)
Females (13+ years) 0.52 0.18 0.034
(nursing)
Females (20+ years) 0.50 0.16 0.026
(not pregnant, not nursing)
Males (13-19 years) 0.69 0.24 0.036
Males (20+ years) 0.57 0.18 0.029
Seniors (55+ years) 0.49 NA b NA b
a/
b/
c/
Exposure levels have been rounded off to 3 significant figures.
Chronic exposure data for this age group alone are not available.
Data from Schaible, 1995.
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