The Nagapattnam Refinery also known as Cauvery Basin Refinery<ref>"Refineries in India". Archived from the original on 28 March 2010.</ref> was the second oil refinery constructed by Chennai Petroleum Corporation Limited. It is situated at Kaveri Basin at Nagapattinam.<ref>Santanu Sanyal (5 February 2003). "CPCL's apattinam refinery to start handling crude". The Hindu.</ref> The initial unit was set up in Nagapattinam with a capacity of 0.5 million metric tonnes per annum in 1993 but later on in 2002 this was boosted to 1 million metric tonnes per annum. LPG is separated out in a gas treating unit built in 1996.<ref>"Narimanam Refinery". A Barrel Full. 11 July 2020 – via wikidot.con.</ref>[unreliable source]
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