Pest Control - Acceptable locations for spraying & dusting

We have been certified to IFS PACsecure standard for the past three years, and our Pest Control Procedure has never been questioned.  Recently we were audited by a customer and there was concern that our procedure did not encompass the below:

1. The pest control program does not include
   1. written instructions for acceptable locations of spraying and dusting with insecticides

In checking various standards, I have not been able to find a clear reference and am wondering if anyone is familiar with standard limitation guidelines, etc? 

Any suggestions would be appreciated. 

do you have a pest control service?  Start with them and see what their requirement would be if they have to apply it - i.e. how much of a surrounding area would have to be cleared out, how long before you can return items to that area, clean up requirements, etc.   Then you could determine if you have an area that meets these requirements.

Thanks for the idea.  We do have a Pest Control company and I'll pose the question you've suggested

Good to know, we do not have the acceptable locations for pesticides written down in our pest control program/PRP. Will add this ty Peaches!