I have no engineering credentials.  However, the folks responsible for Hillside Manor did.  It doesn't take engineering credentials to read the engineering reports on that place following the earthquake and realize that it was a disaster in the making.  The fact that they built it directly outside of city limits at the time might have been the first clue.  But those were the freewheeling old days, right?  There was also the brick plant, located on and using the same clay which led to the destruction of Turnagain (that's where the street name Clay Products derives from).