Stężenia dioks i furanów

Table 3. Comparation PCDF levels in Yusho and Yu-CHeng o.ils [15]    •    .

Analyte	Concęntration (ppm) Yusho oil Yu-Cheng oil
Unknown tetraCDF	0.65	0.05
2,3,7,8-tetraCDF	0.20	traće
2,3,4,7,8-pentaCDF	0.70	0.02
2,3,4,6,7-pentaCDF	0.35	0.02
1,2,3,4,7,8-
l,2,3,6,7,8-hexaCDF	0.12	0.01
Total	2.02	0.10
PCBs	920	8 '
PCDFs/PCBs	0.22	0.13

Table 5. Concęntration bf PCDD/PCDF in the soot of home heating (ppb)

Compounds	MWI Fly Ash	Home Heating Soot Soot Oil Coal/Wood
tetraCDDs	19.06	3.90	1.54
pentaCDDs	37.25	0.41	5.13
hexaCDDs	115.49	3.06	5.20
heptaCDDs	275.88	1.37 '	2.76 .
octaCDD	598.69	1.05	2.37
tetraCDF	79.45	28.91	50.80—- -......
pentaCDF	120.30	16.55	30.04
hexaCDF	116.34	6.24	11.67
heptaCDF	108.24	1.78	3.23
octaCDF	42.90	0.33	0.53
2,3,7,8-tetraCDD	0.60	0.10	0.21
23,7,8-tetraĆDF	2.47	1.07	1.92

Risk and exposure assessment can be viewed as an

1.    Defining source terms

2.    Transport and transformation analyses

3.    Locating receptors 2nd defining dose

4.    Health effects projection

5.    Evaluating risk acceptability

6.    Identifying control options

7.    Recomputing exposure levels

8.    Monitoring results