ISO Part-time Nanny/weekday Babysitter

My family is looking for someone to spend approximately 12-15 hours per week in our home caring for our 7-month-old daughter. Our ideal schedule is 10am-2 p.m. on Monday, Wednesday, and Thursday, though this is somewhat flexible. We are looking for someone to start in the next few weeks and stay on through the summer. This would be an ideal job for a college/grad student with some flex time during the weekdays or a nanny who spends afternoons with another family. Pay is $30/hr. Must be willing to be paid on the books. No driving necessary. Our home in Woodley Park is accessible via public transportation.