The student was found unconscious in the bottom of the school's pool during swim practice at about 5:16 p.m. He was underwater for approximately 90 seconds, Broussard said in a statement.
Fellow members of the swim team quickly removed him from the pool. Feeling no pulse, the swim coach started cardio-pulmonary resuscitation (CPR) for 30 seconds, and the student became somewhat responsive.
Palo Alto police arrived at the scene and provided support prior to the arrival of fire personnel, who then started advanced life-support care. The student became more responsive, Broussard said.
Emergency medical personnel, with help from the engine crew, took over and prepared the student for transport to a hospital. By the time he arrived, he was alert and talking, Broussard said.
The rapid response of students and staff and knowledge of CPR were responsible for saving the student's life, Broussard said. The incident is a good example of how a prepared community, working together in an emergency, can make a difference, he added.
The name of the student and cause of his unconsciousness have not been made public.