Sterility Testing of Cells from Peripheral Blood

I am isolating a cell population from a peripheral blood draw in a cGMP-grade facility in the Dallas/Fort Worth area. I want to validate the sterility of the isolated cells, and will have about 15 different samples tested.

What is the process to send the cells to your facility? What is the time it takes for the test?

Are there different testing options? What is the cost?

Thank you.