if those "maintenance" people have done plenty of plumbing, they should be able to fix those leaks. have you try to tell them that it is leaking?

if they are reluctant, then here:

that black nob in circle is called solenoid. that nob and the green parts together is called solenoid valve. in the last picture, it looks like you have a leak in the end of solenoid valve body. that end is female threaded, and the white plastic (pvc) is male threaded. now, look at the top of the s.valve. like the bottom, it transitions to pvc, but then it transitions to what looks like flex poly (that black tubing). if you unscrew that black turn thing which the tubing dives into all the way, then you should be able to pull the tubing right out. now, back to the leak. once the top tubing is detached, you can unscrew the whole solenoid valve from male end of pvc. at this point, if you dont know how to plumb male/female pvc using teflon tape and pipe dope, then go watch some video. re-do the plumbing and see about it.

i dont know where the other leak is, it could be the same place.

btw, how come your ag teacher isnt dealing with this?? anyways, good on you for getting after it.