Concerning spices, I spoke with a man at Oregon Spice Company and got some great information. First of all I will say that I used their products before the dreaded gluten became my enemy, but currently don't have any in my cupboard. I have always purchased them packaged bulk in plastic bags which I would cut open, use what I needed and clamp shut to store. Because of this, I was concerned that they could have contamination and gave them all away. Today I decided to pursue the company, as their products are really good quality.
I spoke with a gentleman who told me that they go to great lengths to make sure there are no cross-contamination problems. Though they do process on the same lines, they clean the lines well between runs. They wash and sanitize their lines and blenders and have visual inspections to be sure there is no build up.
The products with allergens in them are stored in a different part of the plant. The areas where gluten-containing products are processed are isolated with plastic curtains to make sure the dust does not get into the storage areas. They store their allergen containing products away from allergen free products to avoid accidents.
Once a year they swab equipment and send the swabs to a lab in Portland where they test to make sure there is no gluten residuals and those tests have always been clean. I asked him if they would consider becoming certified gluten free and he said that I was the first customer to make such a request. He said if the demand increased, they would probably consider it.
This conversation left me quite confident with Oregon Spice Company spices. I will be buying them again, but you must decide for yourself if you are comfortable doing this.