CM Prithviraj Chavan announced Wednesday formation of a special investigation team (SIT) to probe financial irregularities and violation of norms by private contractors at the Deonar, Kanjurmarg and Mulund dumping grounds.

"The government needs to evolve a solid waste management policy to effectively tackle the 7,000 metric tonnes of garbage generated in Mumbai. "Preliminary reports have established violation of norms by those awarded 25-year contracts to maintain the dumping grounds," he told the legislative assembly.