Table 6.4         Classification of Contaminated Sediments Analysis Results

 

Vibrocore

Sampling Depth (m)(4)

Metals and Metalloid Content (mg kg-1)

(mg kg-1)

(mg-TBT L-1)

Overall Classification

 

 

Cu

Cd

Cr

Pb

Ni

Zn

Hg

Ag

As

 

Total PCBs

PAHs Low(1)

PAHs High(2)

TBT in Sediment

TBT in Interstitial water

 

VC1      

0.0 – 0.9

9

<0.2

34

25

25

83

<0.05

0.07

5

VC1 Comp

<3

<55

<170

<0.5

<0.015

L

 

1.0 – 1.9

10

<0.2

35

25

24

83

<0.05

0.08

4

VC1 Comp DUP

<3

<55

<170

<0.5

<0.015

L

 

2.0 – 2.9

11

<0.2

38

25

26

86

<0.05

0.07

5

 

 

 

 

 

 

L

VC2     

0.0 – 0.9

9

<0.2

36

25

25

82

<0.05

0.07

4

VC2 Comp

<3

<55

<170

<0.5

<0.015

L

 

1.0 – 1.9

9

<0.2

35

25

25

83

<0.05

0.05

5

VC2 Comp DUP

<3

<55

<170

<0.5

 

L

 

2.0 – 2.9

10

<0.2

36

25

25

82

<0.05

0.07

5

 

 

 

 

 

 

L

VC3     

0.0 – 0.9

8

<0.2

32

23

23

77

<0.05

0.05

5

VC3 Comp

<3

<55

<170

<0.5

<0.015

L

 

1.0 – 1.9

9

<0.2

35

26

26

84

<0.05

0.07

5

VC3 Comp DUP

<3

<55

<170

<0.5

<0.015

L

 

2.0 – 2.9

10

<0.2

36

25

25

82

<0.05

0.07

6

 

 

 

 

 

 

L

Notes:

1.      Low molecular weight PAHs, that is, acenaphthene, acenaphthylene, anthracene, fluorene, naphthalene and phenanthrene.

2.        High molecular weight PAHs, that is, benzo[a]anthracene, benzo[a]pyrene, chrysene, dibenzo[a,h]anthracene, fluoranthene, pyrene, benzo[b]fluoranthene, benzo[k]fluoranthene, indeno[1,2,3-c,d]pyrene and benzo[g,h,i]perylene.

3.      There was insufficient interstitial water to carry out duplicate sample for VC2 for testing of TBT in interstitial water.