Lifeguard Re certification Question?

Last year I became a lifeguard and got all of my certifications. I know I need to get re certified for CPR/AED for the Professional Rescuer, but I also got a Blood Borne Pathogens Training Certification. Do i need to get this one again to continue to be a lifeguard? I live in PA if that matters, and I work at an apartment complex by myself if that has anything to do with it. Thanks!