Contaminant             Shell* (kg)         DNV (kg)
===========================================================

PCBs                     trace             6.5 - 8.0 
Hydrocarbons             50,700.0          75,000 - 100,000
Aluminium                28,677.0          24,000 - 40,000
Arsenic                       0.3          -
Bismuth                      29.0          -
Cadmium                      16.4          1.0 - 3.8
Copper                   13,542.9          7,500 - 13,200 
Indium                       10.2          5.0 - 21.0
Lead                          9.5          0.11
mercury                       0.3          0.4
nickel                        7.4          0.9 - 1.5
silicon                      48.0          -
titanium                      8.8          -
zinc                     13,811.4          5,200 - 8,300

LSA Scale (est)          30 tonnes        7.8 - 9.4 tonnes 

* source: The Brent Spar Abandonment Impact Hypothesis, December
1994.  Table 3.2.7 - the estimated quantities of the main organic
and heavy metal contaminants within the structure.