How so? If I get to pick the thickness that I coat it with I can compare it to anything, from a small pool to the entire worlds oceans. So telling you San Francisco Bay tells you nothing at all.
And they are wrong anyway. 184,000,000 gallons / (1/64 inch) = 677.6 mi^2, while the San Francisco Bay is 1600 mi^2
And just for fun: This could cover all the oceans of the world to a depth of .00000008045 inches. (Which is about 39 atoms thick.)
Maybe it's just that I can see San Francisco Bay out my window.
But I can't visualise the whole of the world's oceans, nor can I visualise a swimming pool coated with half a mile of oil. But a thin layer of oil all across the Bay, that I can easily imagine.
And they are wrong anyway. 184,000,000 gallons / (1/64 inch) = 677.6 mi^2, while the San Francisco Bay is 1600 mi^2
And just for fun: This could cover all the oceans of the world to a depth of .00000008045 inches. (Which is about 39 atoms thick.)