Personally, unless you rented or leased
your apartment with full knowledge that
it had been carpet cleaned using Roundup,
then I would break the lease or vacate
Even if you wore shoes walking on the
carpeting, when you touched your shoes,
you would be contaminating your hands.
If you walk barefoot on the carpet, you
run the risk of absorption through your
feet. I doubt even ripping the carpet up
and re-carpeting would salvage the flooring.
It would have already been absorbed into
the wood or plywood beneath and continue
to be an issue.
IT is a health risk living in an environment
like that. I have included links below to
allow you to look for yourself before you
make your choice. Like I said above, this
is my personal opinion, but based on the
information I have found, there is no way
I would risk my health. What an insane
thing to do to clean carpets anyway.
Google "dangers of Roundup" for more info.
If you are facing a huge expense in the
move, you may consider legal options, like
small claims. Based on the evidence you
would have plenty of reason to move, UNLESS,
you moved in already knowing about the
chemical being used on the carpeting. If
that is true, you have no recourse, although
you still have to choose if it is worth the
risks to stay.