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VARIABILITY IN VOC CONCENTRATIONS IN AN URBAN AREA IN MUMBAI
Anjali Srivastava1and S.A.Dutta2 1National Environmental Engineering Research Institute (NEERI), Mumbai Zonal Laboratory 2Senior Project Scientist, Central Pollution Control Board

ABSTRACT

The variability of pollutants is an important factor in determining human exposure to the chemicals. This study presents the result of investigation of variability of Volatile Organic Compounds (VOCs) in urban area of Mumbai. Fifteen locations, in five categories namely residential, commercial, industrial, traffic intersections and petrol pump were monitored for one year every month during peak hours in morning and evening. Measurement focused on target VOCs as defined by USEPA. Variability was divided into four components namely, measurement, spatial, temporal and temporal-spatial interaction components using statistical method of expected mean square analysis using SPSS package. Temporal component along with temporal-spatial interaction were found to be the major contributors to the variability of measured VOC concentrations. Need of continuous monitoring to capture short-term peak concentration and averages is evident.

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