[en] Included in this report is a list of hazardous and extremely hazardous chemicals at the Oak Ridge Y-12 Plant. The information reflects changes in the lists of hazardous chemicals present at this facility in amounts equal to or greater than 10,000 pounds and extremely hazardous chemicals present in amounts equal to or greater than 500 pounds or its Threshold Planning Quantity, whichever was less. These lists represent the following: List of materials last reported in March 1996 (reference Y/TS-1482); Materials to be deleted from list; Materials to be added to list; and Revised lists of materials