Standards for Sulpur Dioxide for Oil Refinery
Process	Emission Limit
Distillation (Atmospheric Plus Vacuum)	0.25 kg/tonne of feed
Catalytic Cracker	2.5 kg/tonne of feed
Sulphur Recovery Unit	120 kg/tonne of Sulphur in the feed
Source : Environmental Standards for Ambient Air, Automobiles, Fuels,
Industries and Noise, Central Pollution Control Board, Ministry
of Environment & Forest.