- Table 4 to Subpart NNNN of Part 63—Default Organic HAP Mass Fraction for Petroleum Solvent Groups a
You may use the mass fraction values in the following table for solvent blends for which you do not have test data or manufacturer's formulation data.
| Solvent type | Average organic HAP mass fraction | Typical organic HAP, percent by mass | Aliphatic b | 0.03 | 1% Xylene, 1% Toluene, and 1% Ethylbenzene. | Aromatic c | 0.06 | 4% Xylene, 1% Toluene, and 1% Ethylbenzene. |
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a Use this table only if the solvent blend does not match any of the solvent blends in Table 3 to this subpart and you only know whether the blend is aliphatic or aromatic.
b e.g., Mineral Spirits 135, Mineral Spirits 150 EC, Naphtha, Mixed Hydrocarbon, Aliphatic Hydrocarbon, Aliphatic Naphtha, Naphthol Spirits, Petroleum Spirits, Petroleum Oil, Petroleum Naphtha, Solvent Naphtha, Solvent Blend.
c e.g., Medium-flash Naphtha, High-flash Naphtha, Aromatic Naphtha, Light Aromatic Naphtha, Light Aromatic Hydrocarbons, Aromatic Hydrocarbons, Light Aromatic Solvent.