“…Their conclusions, which are based on the review of historical operations records, the physical appearance of cores, and analytical work on grab samples, are summarized in Table 2-1. The composition of the lower three layers is based on historical information and observations of the 1986 core (Weiss and Schull 1988, Schreiber 1996, Reynolds 1997, Bailey 1999. The conclusion that these layers originated from washed Plutonium-Uranium Extraction (PUREX) process sludge (AR), PUREX cladding waste (CWP), and uranium recovery waste (UR) is relatively secure.…”