7 – Send email only if a field has a certain value

I am using the web form in Drupal 7 and I have a case where I need to send an email only if a certain selection field has an option selected. I have installed web form rules and rules, but I am a bit stuck on how to make this work.

In my web form I have the field called type (which is nested in a set of fields called shipping). My 3 options in the field are land, air, ocean. What I would like to do is send an email (using the rules due to a pdf attached to the email) only if the option selected is Ground.

Is this possible with drupal 7 and the web form rules / rules?