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 |
Aliphaticb | 0.03 | 1% Xylene, 1% Toluene, and 1% Ethylbenzene. |
Aromaticc | 0.06 | 4% Xylene, 1% Toluene, and 1% Ethylbenzene. |
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.
40 C.F.R. 63.1662-63 app Table 4 to Subpart NNNN of Part 63