7 – Send an e-mail only if a field has a certain value

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

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 Ground, 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 web form rules / rules?