Table 2 Mean sediment concentrations of pollutants in the Bornholm Deep14 with estimations of their resuspended tonnage, EQS and relative mixture toxicity contributions.

From: Environmental impact of the explosion of the Nord Stream pipelines

Compound

Mean concentration in Bornholm deep sediments [µg/kg]

Resuspended pollutant mass

[Kg]

EQS

[µg/L]

Toxic contributions

[%]

Organics

 PBDE

0.31

< 0.1

0.0049

0.04

 HBCD

0.92

0.2

0.0008

0.67

 Anthracene

6.3

1.6

0.1

0.04

Metals

 Hg

60

15

0.05

0.7

 MeHg

0.375

< 0.1

0.0065

0.03

 Cd

1140

285

0.2

3.3

 Pb

57,700

14,425

1.3

25.9

 Cs-137

77 Bq/kg

NA

0.015 Bq/L

3.0

 Cr

14,700

3675

3.4

2.5

 Cu

15,500

3875

1

9.0

 Zn

14,600

3650

7.8

1.1

 Ni

4000

1000

8.6

0.3

 As

1800

450

0.6

1.8

 TBT

17.7

4.4

0.0002

51.6

Chemical warfare agents

 Sum As based

129.2

32.3

0.6

0.1

 Sum mustard gas related

9.2

2.3

830

0.00001