I agree with the above. If you would like to find out if she's interested in you, ask her out for something non-invasive like a cup of coffee or something outside of work. She will let you know in one way or another how she feels.
HOWEVER, I would also like to say that it can be a slippery slope if you start dating someone you work with. There's a reason the expression "Don't shit where you eat" exists. If anything turns sour it can wind up pretty bad. Just be careful and take everything into consideration, maybe progress a little more slowly.
"Ignore the ramblings of the ignorant, and step on or over their crumpled bodies as you make your way to the top of the mountain. Eat upon their flesh for fuel, and, through your determination and will, banish them to obscurity and a life of complacency and self righteousness that is the hell in which they live"
-Richard Safreed
"Civilize the mind, but make savage the body."