Stationary Sources of Airborne Lead: A Comparison of Emissions Data for Southern California

Harris, Allison R.; Fifarek, Brian J.; Davidson, Cliff I.; Blackmon, Rebecca Lankey

doi:10.1080/10473289.2006.10464518

Cited by 1 publication

(1 citation statement)

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“…Because of the greater detail in the CARB database, we use their analysis here rather than the other available data (18) we assign an overall uncertainty of (50% to the CARB total, although the true uncertainty may be even greater.…”

Section: Emissionsmentioning

confidence: 99%

The Role of Resuspended Soil in Lead Flows in the California South Coast Air Basin

Harris

Davidson

2005

Environ. Sci. Technol.

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The inputs and outputs of airborne lead in the South Coast Air Basin of California (SOCAB) are quantified according to standard mass balance calculations. Results for 2001 show that approximately 49,000 kg of lead exitthe Basin each year, but traditional sources contribute only about 6500 kg of lead each year. We resolve this discrepancy through a simple computer model that quantifies the resuspension of lead-containing particles. Our results suggest that these lead particles were deposited during the years of leaded gasoline use and that resuspension is responsible for generating an additional 54,000 kg of airborne lead each year. This agrees roughly with estimated outputs. Thus, we conclude that resuspension, although an insignificant source of airborne lead during the era of leaded fuel, became a principal source in the SOCAB as lead emissions from vehicles declined. The results of the resuspension model further suggest that soil lead levels will remain elevated for many decades, in which case resuspension will remain a major source well into the future.

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Section: Emissionsmentioning

confidence: 99%