F’ing Septic Tanks

I know you can't tell now but in summer dry weather can you see 3 green streaks where the lateral lines are running. They need to be installed perfectly level so the liquid will migrate over the entire leach field. If they are not level it can't travel from one end to the other so if you can only see a green spot over part of field that would indicate that it is not operating properly. Trying to point out all possible causes because I understand the frustration