RESIDUES OF BUNKER C OIL IN CHEDABUCTO BAY, NOVA SCOTIA, 6 YEARS AFTER THE ARROW SPILL

The Arrow spill in February 1970 heavily oiled about 1/2 of the 600 km shoreline of Chedabucto Bay, Nova Scotia. An extensive field survey and chemical analysis of sediment samples for aliphatic and PAH identified only a few locations where Arrow Bunker C remained in the intertidal and sublittoral sediments. The upper intertidal zones of Rabbit, Crichton, and Durell islands remain covered with an oil and sediment mixture of a "pavement-like: consistency. Several areas showed visual and chemical evidence of recent spills during the survey period. All sublittoral sediment samples contained hydrocarbons of petroleum origin. The distribution of the most highly contaiminated sublittoral sediments suggests either reentry of stranded oil into the water column and into the sublittoral sediments or contamination from shipping and fishing vessels. Concentrations in the sublittoral sediments are below those found toxic to benbthic organisms. An estimation of the amount of Bunker C remaining in Chedabucto Bay is impossible due to the patchy distribution, contributions of more recent spills, and the absence of adequate control sites.

  • Supplemental Notes:
    • Symposium on Recovery Potential of Oiled Marine Northern Environments, Halifax, N.S., Canada, October 10-14, 1977.
  • Corporate Authors:

    Department of Fisheries and the Environment

    Fisheries and Marine Service, 116 Lisgar
    Ottawa, ONo K1A OH3,   Canada 
  • Authors:
    • Keizer, P D
    • Ahern, T P
    • Dale, J
  • Publication Date: 1978-5

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Filing Info

  • Accession Number: 00193565
  • Record Type: Publication
  • Source Agency: Data Courier, Incorporated
  • Files: TRIS
  • Created Date: Apr 25 1979 12:00AM