Encyclopedia of Environmental Science and Engineering, Volume I and II

900 PCBs AND ASSOCIATED AROMATICS

TABLE 32

2,3,7,8-TCDD equivalent for PCDDs and PCDFs derived from the data in Table 31

2,3,7,8-TCDD equivalents

Population Isomer Mean Upper value of range

South Vietnam (1970) 2,3,6,8-TCDD 11.4 55

Total Equivalents: 11.4 55

South Vietnam (1984) 2,3,7,8-TCDD 0.68 3.1

1,2,3,7,8-P 5 CDD 0.22 0.65

H 6 CDD 0.12 0.42

1,2,3,4,6,7,8-H 7 CDD 0.005 0.02

O 8 CDD 0 0

1,2,3,4,7,8-P 5 CDF 0.06 0.14

H 6 CDF 0.02 0.05

1,2,3,4,6,7,8-H 7 CDF 0.0009 0.0022

Total Equivalents: 1.11 4.38

North Vietnam 2,3,7,8-TCDD ND

1,2,3,7,8-P 5 CDD 0.02 0.055

H 6 CDD 0.0096 0.029

1,2,3,4,6,7,8-H 7 CDD 0.0006 0.0017

O 8 CDD 0 0

1,2,3,4,7,8-P 5 CDF 0.031 0.088

H 6 CDF 0.0032 0.006

1,2,3,4,6,7,8-H 7 CDF 0.00009 0.00032

Total Equivalents: 0.065 0.18

Japan† 2,3,7,8-TCDD 0.48 0.70

P 5 CDD 0.28 0.56

H 6 CDD 0.11 0.20

1,2,3,4,6,7,8-H 7 CDD 0.01 0.01

O 8 CDD 0 0

2,3,7,8-TCDF 0.06 0.017

2,3,4,7,8-P 5 CDF 0.13 0.17

1,2,3,4,7,8-H 6 CDF 0.01 0.01

1,2,3,4,7,8,9-H 7 CDF 0.0003 0.0006

O 8 CDF 0 0

Total Equivalents: 1.08 1.82

United States 2,3,7,8-TCDD 0.19 0.38

1,2,3,7,8-P 5 CDD 0.6 3.4

H 6 CDD 0.11 0.5

1,2,3,4,6,7,8-H 7 CDD 0.0033 0.015

O 8 CDD 0 0

2,3,7,8-TCDF 0.034 0.12

2,3,4,7,8-P 5 CDF 0.1 0.29

H 6 CDF 0.0068 0.013

1,2,3,4,6,7,8-H 7 CDF 0.00068 0.0021

O 8 CDF 0 0

Total Equivalents: 1.04 4.72

C016_003_r03.indd 900C016_003_r03.indd 900 11/18/2005 1:12:38 PM11/18/2005 1:12:38 PM