『Abstract
　Urban soils act as the repository for a number of environmental burdens, including Pb. Significant attention has been devoted to reducing Pb burdens to children with outstanding success, but the fact that blood Pb levels above 10μg/dL are disproportionately found in children living in many USA cities (15-20％ in some cities compared to a national average of less than 2％) indicates that not all of the sources have been eliminated. Although the health risk of fine particulates has begun to raise concerns in cities, little attention has been paid to Pb associated with these particulates and the potential role of this pathway for continued Pb burdens of urban youth. This review summarizes recent work on particulate resuspension and the role of resuspension of Pb-enriched urban soils as a continued source of bio-available Pb both outside and inside homes, then presents recent efforts to model Pb burdens to children based on the atmospheric parameters that drive particulate resuspension. A strong seasonal relationship is found between atmospheric particulate loading and blood Pb levels in children, and new particulate loading models are presented for a range of US cities involved in the Interagency Monitoring of Protected Visual Environments (IMPROVE) program. These seasonal particulate loading models have implications for a number of respiratory health impacts, but can also be used to calculate seasonal patterns in bio-available Pb redistribution onto contact surfaces (the primary pathway for ingestion-related uptake in toddlers) and assist clinicians in interpreting time-specific blood Pb tests.』

Contents
1. Introduction
2. Review of soil Pb, particulate resuspension and blood lead
　2.1. Urban soil Pb
　2.2. Urban soil Pb topology
　2.3. Roadside soil resuspension
　2.4. Soil resuspension as a contributor to PM10
　2.5. Reducation in household Pb loading due to soil abatement
　2.6. Transport of Pb from outside to inside
　　2.6.1. Particulate penetration and air exchange rates
　　2.6.2. Exterior Pb loading and indoor Pb penetration
　2.7. Source apportionment of Pb in house dust
　2.8. Association between soil Pb and blood Pb study designs
　　2.8.1. Association between soil Pb and blood Pb study designs: cross-sectional
　　2.8.2. Association between soil Pb and blood Pb study designs: ecological-spatial
　　2.8.3. Association between soil Pb and blood Pb study designs: ecological-temporal
　　2.8.4. Association between soil Pb and blood Pb study designs: prospective soil removal
　　2.8.5. Association between soil Pb and blood Pb study designs: Descriptive
　　2.8.6. Blood Pb seasonality
　　2.8.7. Blood Pb seasonality and climate forcing
　　2.8.8. Alternative theories of blood Pb seasonality
3. New directions in soil resuspension and Pb loading
　3.1. Methods
　　3.1.1. Data
　　3.1.2. Statistical model
4. Results
　4.1. Hypothesis #1 - USA atmospheric soil seasonality
　4.2. Hypothesis #2- atmospheric soil prediction model
5. Discussion
6. Conclusions
Acknowledgements
References