I looked up Cereplast address which is 2213 Killion Avenue Seymour, IN and google mapped it. I used the sattelite view and found it and only one car parked there. I do not know on what day the image was taken or the time, but a little disheartening.
This company is conscious about the environment and so may be the employees take the bus or car pool. You may need to stand near the entrance of the company at 8AM and physically check the number of people coming in.
I just checked on the same website and it looks like there is much more than just one car. Looks like many cars and 5 semi trailers at a loading dock. Someone else check also. Maybe I was looking at the wrong address, but I don't believe so.