Abstract
The paper describes the initial data to evaluate ambient lead concentration as an influence of the phasing-out leaded gasoline for Jakarta City. Since July 2001, unleaded gasoline sales at public gasoline pump stations in administrative boundary of Jakarta and Cirebon city. Measurement of particulate and lead in ambient air use manual monitoring stations that conducted for 24 hours, one day per month start from July to October (5 times per year). Measurement taken at 8 monitoring stations consist of five monitoring stations in Jakarta Area and 3 monitoring stations in Bogor, Tangerang and Bekasi (as control locations). The first finding from TSP and Lead Monitoring in 2002 and 2003 is TSP in Jakarta areas tend to increase the concentration in ambient air and samples frequency that exceed the NAAQS on the contrary with monitoring results in Botabek areas. Second, Lead concentration in both areas tend to decrease the concentration in ambient air and samples frequency that exceed the NAAQS. These findings shows a good influence of unleaded gasoline programme to decrease the lead concentration in ambient air of Jakarta City and so monitoring of lead concentration should be continued or even add the locations and sampling frequency.
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