Metal Content of Ocean Sediments in Support of UXO Clearance - HMS Raleigh – Second Round

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Authors
  1. Fisher, G.
  2. Nault, P.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
The wreck of the HMS RALEIGH in 1922 resulted in the dispersal of various unexploded ordnance (UXO) in shallow water 15 metres off the coast of Pointe Amour, Newfoundland. The risk posed by the UXO to nearby residents and recreational divers was considered unacceptable and therefore some remediation method was sought. Various studies indicated that the safest remediation method was on-site underwater detonation. However, it was recognized that on-site detonation could pose some environmental risks from release of energetic and metallic constituents into the ocean water and sediments. This report describes the results of a second round of UXO detonation and sediment sampling undertaken in support of UXO clearance operations for the HMS RALEIGH site. It was found that the concentration of copper, phosphorus and strontium in sediment did increase as a result of the UXO disposal activity. Conversely, the concentrations of molybdenum and tin in the ocean sediment were found to decrease.

Il y a un résumé en français ici.

Keywords
UXO;unexploded ordnance;HMS RALEIGH;clearance
Report Number
DRDC-ATLANTIC-TM-2005-062 — Technical Memorandum
Date of publication
01 Sep 2005
Number of Pages
28
DSTKIM No
CA026612
CANDIS No
524499
Format(s):
Electronic Document(PDF)

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