Hi Faroe, thanks.
Yes, unfortunately this is the document that I couldn't attach a link to, and is the one I have been referring to. I couldn't figure out why it wouldn't display and in the end abandoned trying to attach it to the post. It also seems to do it for your post. When I click on the link on your post it says, "the page cannot be displayed". Certainly in that document it warns about using sodium hypochlorite on some plastics as I refer to above.