PAN - reference on mercury limit.
Wilhelm, S. M., “An Estimate Mercury Emissions to the Atmosphere from Petroleum”, Environ. Sci. Tech., Vol. 35, 24:4704 (2001). There is no limit specified in this reference but the rationale for one is explained.
The 50 ppb limit is arbitrary based on my...
The limit of mercury in crude oil acceptable to refineries depends on where the refinery is and what it makes. Generally speaking, refineries that make motor fuels are less sensitive to mercury than those that make naphtha for petrochem. If the refinery is in a country that regulates stringently...