SYMPOSIA PAPER Published: 01 January 1992

Contribution of Childhood Ingestion of Contaminated Soil to Lifetime Carcinogenic Risk: Guidance for Inclusion in Risk Assessment.


Risk assessment guidance usually addresses carcinogenic effects for adults but not for children, because carcinogenic effects are presumed to require a lifetime to occur. However, because children may ingest significantly larger quantities of soil than adults, exposure to carcinogenic chemicals in soil may present higher risk to children than to adults. Using standard exposure assumptions, tables were constructed for screening soil concentrations to evaluate the level of carcinogenic risk resulting from ingestion of soil by children. Allowable concentrations of chemicals in soil were determined for selected chemicals for both children and adults. The results indicated that soil concentrations that are protective for adults for the soil ingestion pathway may not be sufficiently protective for children; concentrations protective for children may be lower than those for adults by a factor of 3 to 7.

Author Information

Hixson, EJ
Radian Corporation, Austin, TX
Jennings, RE
Radian Corporation, Austin, TX
Smith, SA
Radian Corporation, Austin, TX
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Developed by Committee: D18
Pages: 129–137
DOI: 10.1520/STP23836S
ISBN-EB: 978-0-8031-5213-7
ISBN-13: 978-0-8031-1445-6