Metal Content of Ocean Sediment in Support of UXO Clearance – HMS Raleigh

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Authors
  1. Fisher, G.
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 the sampling program undertaken to assess whether metallic species accumulated in sediment at the wreck site as a result of the UXO detonations. It was found that the concentration of antimony, barium, boron, copper, lead, silicon and zinc did increase as a result of the UXO disposal activity.

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Keywords
HMS RALEIGH;UXO;clearance;sediment;metal content;Energetic materials;Environmental impacts of explosives;Underwater UXO;Unexploded Ordnance
Report Number
DRDC-ATLANTIC-TM-2003-154 — Technical Memorandum
Date of publication
01 Dec 2003
Number of Pages
32
DSTKIM No
CA024558
CANDIS No
522213
Format(s):
CD ROM

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