What do you mean by significant merit? What is your budget? I would not count on significant merit to U of Rochester.
Take a look at Keuka College in upstate NY. They have both a major and minor and she may get merit. The U of New Hampshire is another school to look into.
The student might want to consider getting an undergrad degree in general education or special education (or both) and then get a masters in deaf education. Alternatively, she can major in ASL and get a masters in special or gen ed (or both). She could also double major.
If she majors in ASL what is her career goal? Is she looking to work as an interpreter? I see she is a sophomore so she may not know (which is fine).
I worked in a hospital with a large deaf community. The hospital did not hire ASL interpreters. Rather, they used social workers, SLPs etc who knew ASL, understood deaf culture etc. That is something to keep in mind (this may not be true everywhere).
There are agencies who hire ASL interpreters.