hCard and missing "updated" field

Ok…so I have been through, I think, every conceivable thread regarding this issue and none of them have lead me to a solution. I am receiving an error from the structured data testing tool on this url ( and the same error on over 100 other pages of my site)

http://www.asjcleaning.com/emergency-restoration-services/sewage-mitigation-services/

Now I have been advised what to look for and change in my single.php file, I have been instructed to make edits in my functions.php file. I have followed these suggestions and the patches of code that they tell me about and often they tell me to look for xyz patch of code that does not seem to exist on twentythirteen. Can anyone help with fixing these issues on pages…not posts…for twentythirteen?