[Retired Chemist]

I worked in an industry that had occasional problems with rail cars and trucks that weren't cleaned properly. It wasn't life threatening but it messed up our product.

[Cold Heart]

It's only been recent history where the government prohibited carrying foodstuffs in carriers that contained chemicals.

[1COUNTER-MORTER-68]

You would know better than the rest of us,,,
for that amount of product to have been tainted,,,
must be the bulk-carrier...
shipping records must have led them back-track...
this stuff will turn up in other places,IMHO,this week.

[mamelukesabre]

If you do a calculation of volume versus surface area, you will find that in the case of a rail tanker it is perfectly safe for most substances for a tanker to be used for fuel or some such inedible substance in one trip and then used for milk or some edible substance the next trip.

Why do I say volume versus surface area? Because you use surface tension properties to determine the thickness of the "skin" of fluid present on the interior surface of the vessel once it is drained.

In reality the quantity left over is much less since the interior is hosed down and let dry.