Los Angeles, eh? First thing that comes to mind is possibility of salt water. Second thing that comes to mind is why is it leaking? That often is the result of overheating. And if that is the case, what other damage is lurking in the shadows?
Anyhoo, figure a couple hours of work at the going rate, whatever that is in the LA area. Around $100/hr most places. Then there are the "environmental surcharges" or whatever they call them there. That is paid to the city or state and recyclers to deal with the dirty rags, oil waste, and ?????? Oh, yeah, we are talking California aren't we.......the strictest state in the world. Gone are the days when we just dumped it in the ditch. And Lord help if a moonlighter contaminates his own lot (or yours). It suddenly becomes worthless and a liability. All this to say pay the guy. Or find another recreational activity.