Hmmm,, I came across mobile bay yesterday afternoon,,, no smell. I live one mile south of I-10 and eight miles from Mobile bay, no smell. There is some fuel storage over on the Mobile River near I-10,,you can always smell diesel or creosote type smell near there.
I live near the bay, and check it out most every day, and have seen nor smelled anything out of the ordinary.
The smell depends on the wind. Some days I’ve smelled the oil, but most days I haven’t. When you smell it, it is pretty bad.