Characterization of dry deposition associated with fire in plastic scrap market of west Delhi

Samples of dry deposition were collected at National Physical Laboratory during a fire incident occurred at Jwalapuri, a plastic scrap market located in west Delhi. About 2500 shops were gutted in this fire and almost 1/4th of the city was affected by the plume. The collected samples were analyzed for Cl, NO3, SO4 and NH4. pH and Electrical Conductance of the samples were also measured. Data showed that deposition of Cl, SO4, NO3 was significantly higher than the normal conditions as reported earlier. It was estimated that respectively 21, 11, 16 and 0.2 tones of Cl, SO4, NO3 and NH4 were deposited by dry removal process during this fire incident.