Is this a proper vent for a double vanity?

[tfratzel]

I am adding a second sink, 48" away from the first sink, to my bathroom. I'm wondering if I'm properly venting the new drain. I have attaced an elevation view of the proposed drain system. Does anyone have a comment?

Addendum:

I've come up with another possible solution.....see the 2nd attachment. Still no input from anyone