Power steering leak
 

Ok.... I've had 3 power steering pumps installed, new hoses, and it still leaks. The last mechanic called and said " come get the car.... I have no idea where the leak is coming from". It only leaks ( now) when it's being driven. I can back up or pull forward while putting the steering under turning pressure get out look at the ground and there will be a 3 foot stream pattern about 2 inches wide????? Any ideas. Thanks in advance,