AST (SGOT) is primarily found in the muscles, liver, and heart. As such, these enzymes will be within the normal range on a blood test. However, if there is any injury or damage to your muscles, liver, or heart, these enzymes spill into the bloodstream and will be reflected in the blood report as being elevated.
There's also a 24/7 public parking garage across the street from Mt. Royal Station at The Fitzgerald. While not as close as the Penn Station garage, it has the same $12 max daily rate & it's monthly rate is only $130.
Tipping is always a nice gesture. Whether you are paying a standard fee or valet parking is offered on a complimentary basis, tipping is still customary. The going rate is $3-5 per vehicle.