Survey Charge and Quarry

I want to get a spot that gets all 5 ores/frags but the most I’ve found so far is 4. Is there some trick to it? Also how far should I place my charges apart, and if I come back later will the same spot give me the same amount of ore? I tried marking the spot and was pretty sure I came back later and it gave me different ore. Thanks for clearing this up.

5 ores is not useful. Yore boat will not row straight.

Yore welcome.