0000912057-01-539897 10-Q 1 20010930 20011114 IRON MOUNTAIN INC/PA 0001020569 4220 232588479 PA 1231 10-Q 34 001-13045 1791464 745 ATLANTIC AVENUE BOSTON MA 02111 6175354766 745 ATLANTIC AVENUE BOSTON MA 02111 PIERCE LEAHY CORP 19960807 10-Q 1 a2063520z10-q.txt FORM 10-Q