40 CFR Appendix Table 4 to Subpart NNNN of Part 63, Default Organic HAP Mass Fraction for Petroleum Solvent Groups a

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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.

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.

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

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United States Code

Title 40 published on 2015-08-22

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR Part 63 after this date.

  • 2017-04-06; vol. 82 # 65 - Thursday, April 6, 2017
    1. 82 FR 16736 - Mercury and Air Toxics Standards (MATS) Electronic Reporting Requirements
      GPO FDSys XML | Text
      Final rule.
      This final rule is effective on April 6, 2017.
      40 CFR Part 63