How much do you want to bet MMM or whoever made the epoxy never authorized it's use in an environment like that or they were never consulted to begin with...
(with thermal expansion and contraction of the material it is anchored to and that material being substandard to begin with... WHY not through bolt??)
Now Mass gets to harvest the fruits of their corruption with the original surface roads bulldozed and the tunnel closed ,, commutes must be REAL FUN....