[1] This refinery was commissioned in 1975 and is situated 136 km from Kolkata, at the junction of Haldi and Hooghly River.

[2] Two sectors were commissioned in January 1975 for processing 2.5 MMTPA of Middle East crude - one for producing fuel products and the other for Lube base stocks.

The refining capacity of the Refinery was increased to 2.75 million tonnes per year in 1989 through debottlenecking measures.

[4] On December 21, 2021, a flash fire took place at the Motor Spirit Quality unit of the refinery, which was under maintenance.

Sparks from a welding operation ignited a flammable material, leading to an explosion and fire, which resulted in the deaths of 3 workers and injuring 44 others.