Assuming you're adhering to federal, state and local regulations in the production, packaging, testing and warehousing (also assuming you're not the shipping agent) at your facilities, then your liability in the instance of a positive test should be minimal. The monitary cost is something completely different factoring in the associated expenditure for the recall and negative publicity. You didn't budget for added legal council and investigation teams. IF (note: IF) you tested positive, and the subsequent investigation traced it back to your facility/production, you may be liable for the entire cost of the investigation should they find that you weren't adhering to law, regulations, policy, procedure, etc.
Regulatory ramifications are that you may be the 'one' to spark further regulations on the testing of your type of facility. Unless you live in a vacuum, you know that the three regular food safety issues here in the US are Salmonella, e-Coli and Listeria. Subsequently, testing and detection regulations are changing yearly and you should be vigilant in not only what the current regulations are, but how the next set of regulations may affect your business, so as to anticipate any capitol expenditures you may have to assume to bring your facilities and production up to code. The grace periods are very short in all 50 states. If you care to divulge what your products are, I can guide you to specific regulations and policies, because at this point the list of links would look like a google search of "NYC" results. Edit: strike this...Charles responded while I was typing. Give me a few to research and I'll post some links.
The "Etc." is that regardless of the findings, should the media get ahold of a story that your company was involved in an investigation, the damage to reputation may exceed the costs of enacting a 'exceed regulations' policy. Marketing that fact takes far less to budget for than JUST the non-budget marketing campaign to regain the trust of your customers and consumers.
Edited by Chief Inspector, 17 November 2010 - 04:04 PM.