Table 6.2       Contaminant Levels of Riverbed Soil Samples and Their Categories

 

Sampling Station No.

LMW

HMW

Total

PCBs

Metals

Overall Category

PAHs

PAHs

mg/kg

ug/kg

ug/kg

Ug/kg

Ag

As

Cd

Cr

Cu

Ni

Pb

Zn

Hg

S1

<550

<1700

<23

<0.1

1.1

0.1

<1

1.8

<1

22

37

0.09

L

S2

<550

<1700

<23

0.4

1.8

<0.1

2.1

4.0

1.2

23

47

0.2

L

S3

<550

<1700

<23

0.2

11

0.1

2.7

2.3

<1

10

55

0.1

L

S4

<550

<1700

<23

<0.1

6.5

<0.1

2.2

4.5

1.2

18

42

0.09

L

S5

<550

<1700

<23

0.4

<1

<0.1

2.2

2.0

1.1

22

44

0.2

L

S6

<550

<1700

<23

0.3

1.7

0.1

3.9

2.7

1.2

34

31

0.1

L

S7

<550

<1700

<23

0.5

2.4

<0.1

1.5

1.7

<1

7.6

22

0.3

L

Notes:

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

2.    HMW = 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.