Situation A  Massachuse*s  public  school  system  consis4ng  of  over  twenty  buildings  –  pre-­-k  through  high  school  –    was  made  aware  that  its   schools  built  or  renovated  between  1950  and  the  1970s  could  poten4ally  contain  polychlorinated  biphenyls  (PCBs).  At  this  4me,   the  federal  Environmental  Protec4on  Agency  (EPA)

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