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REDUCING CHILDREN'S RISK TO SOIL LEAD: SUMMARY OF A FIELD EXPERIMENT TO REDUCE SOIL LEAD BIOAVAILABILITY (ABSTRACT)
Citation:
Ryan*, J A., W. R. Berti, S. L. Brown, S. W. Casteel, R. L. Chaney, AND et al. REDUCING CHILDREN'S RISK TO SOIL LEAD: SUMMARY OF A FIELD EXPERIMENT TO REDUCE SOIL LEAD BIOAVAILABILITY (ABSTRACT). SETAC 23rd Annual Meeting in North America, Salt Lake City, UT, 11/16-20/2002.
Description:
Reducing risks associated with Pb in soil has typically been accomplished by soil removal, covering, or dilution by mixing with uncontaminated soil. EPA's National Risk Management Research Laboratory (NRMRL) and DuPont Corporation established a collaborative effort to evaluation in situ remediation techniques. The In-place Inactivation and Natural Ecological Restoration Technologies (IINERT) Soil-Metals Action Team was established in November 1995 as one of several Action Teams under the US EPA Remediation Technologies Development Forum (RTDF). Its primary goal was to examine in situ remediation alternatives that are low cost and environmentally benign, yet provide equivalent or better protection to human health and the environment compared with conventional methods, such as excavation and capping. The IINERT Soil-Metals Action Team includes representatives from industry and government who share an interest in further developing and validating in situ techniques as viable technologies for eliminating the hazards of metals in soils and other surficial materials. A field experiment was started in the fall of 1996 at an urban site in Joplin, MO, USA. The objective was to help accomplish the two-fold mission of the team: 1) develop and demonstrate in situ treatment technologies that reduce and eliminate the risks to human health and the environment of metals in soil and 2) achieve regulatory and public acceptance of these technologies. The data that has been developed from this cooperative research effort will be discussed. Evaluation of both the change in soil Pb geochemistry and its bioavailability (in vivo and in vitro) were measured over time. Results from this field evaluation illustrate the viability of the these techniques and demonstrate that reduction in soil Pb risk can be accomplished without soil removal.