Well, its time to break it up to you:
I work near a huge food distribution center in São Paulo, its called CEAGESP. Last monday, I took pictures of an AMERICAN SEWER TRUCK near there. The truck had even had a huge logo, in it. The street was blocked and two police cars were blocking the street. Some hoses were down in the telephone tunnels there and a very strong "chemical" smell, I can't define the smell, but it was like moth balls smell. I took some pics:


[link to i1283.photobucket.com]

[link to i1283.photobucket.com]

Now that's really odd... something fishy in the air...