"there small black tar leak out the black ballast. Capacitor seem be intact fine."
Tell me if I'm wrong, but this "black tar" means PCB toxicity, so there's nothing really fine here.
If it is really black, hard and leaking only from the "core and coil" assembly, it is simply tar and not any PCB.
PCB's are only in the capacitor oil (so it can only leak from the capacitor), what is normally transparent (like water,...) or slightly yellowish (if contaminated by or mixed with tar or such components). And because of the oil, it will never harden...
So if the capacitor is really intact (not leaking,...), it mean it for sure is no PCB in the leak.