School hose fountain found to hold unsafe amount of head but a few weeks subsequent, organize is at a not dangerous smooth. How? I really can't figure this out. I get this question for homework. It say...

I really can't figure this out.
I get this question for homework.
It say that the first test happen in delayed august and the second test once the students returned to arts school. None of the pipes were replaced and the academy was unused during the summer.
AC broken correctly?
Answers:    When dampen sits for an amount of time in pipes it will leach the head out. After the water starts running again the horizontal of lead surrounded by the water will drop off substantially. However, it may or may not still contain some lead
I can still smell mold surrounded by my...
They run the water until it cleared ample to be okay to drink w/o lead. Not true though. That stuff is discouraging news. I inculcate.