We present source term data from both passive and active sources, and compare emissions from compost aged at 1, 2, 4, 6, 8, 12 and 16 weeks. The results reveal that the age of compost has little effect on the concentrations emitted. The bioaerosol emissions from passive sources were in the range of 10 3-10 4 cfu/m 3 , with releases from active sources usually 1-log higher. We propose further improvements to current risk assessment methodologies by examining the differences between two air dispersion models for the prediction of downwind bioaerosol concentrations of off-site points of exposure. Our results show that SCREEN3 provides a conservative estimate of the source depletion curves of bioaerosol emissions in comparison to ADMS 3.3. However, the results from both models

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Abstract:This study aims to determine some heavy metals such as lead (Pb) and cadmium (Cd)