# The Environmental Authorisations (Scotland) Regulations 2018, Paragraph 17


In order to determine the total concentration of dioxins and furans, the mass concentrations of the dibenzo-p-dioxins and dibenzofurans in column 1 of Table 1 must be multiplied by the equivalence factors in column 2 of Table 1 before totalling.
Table 1
Toxic equivalence factor
2,3,7,8 — Tetrachlorodibenzodioxin (TCDD)
1
1,2,3,7,8 — Pentachlorodibenzodioxin (PeCDD)
0.5
1,2,3,4,7,8 — Hexachlorodibenzodioxin (HxCDD)
0.1
1,2,3,6,7,8 — Hexachlorodibenzodioxin (HxCDD)
0.1
1,2,3,7,8,9 — Hexachlorodibenzodioxin (HxCDD)
0.1
1,2,3,4,6,7,8 — Heptachlorodibenzodioxin (HpCDD)
0.01
Octachlorodibenzodioxin (OCDD)
0.001
2,3,7,8 — Tetrachlorodibenzofuran (TCDF)
0.1
2,3,4,7,8 — Pentachlorodibenzofuran (PeCDF)
0.5
1,2,3,7,8 — Pentachlorodibenzofuran (PeCDF)
0.05
1,2,3,4,7,8 — Hexachlorodibenzofuran (HxCDF)
0.1
1,2,3,6,7,8 — Hexachlorodibenzofuran (HxCDF)
0.1
1,2,3,7,8,9 — Hexachlorodibenzofuran (HxCDF)
0.1
2,3,4,6,7,8 — Hexachlorodibenzofuran (HxCDF)
0.1
1,2,3,4,6,7,8 — Heptachlorodibenzofuran (HpCDF)
0.01
1,2,3,4,7,8,9 — Heptachlorodibenzofuran (HpCDF)
0.01
Octachlorodibenzofuran (OCDF)
0.001

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Source: https://www.legislation.gov.uk/ssi/2018/219/schedule/22/paragraph/17 (the official version)
Page: https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-22/paragraph-17
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.