- Table 2 to Subpart II of Part 63—Volatile Organic HAP (VOHAP) Limits for Marine Coatings
| Coating category | VOHAP limits a b c | Grams/liter coating (minus water and exempt compounds) | Grams/liter solids d | t ≥4.5 °C | t <4.5 °C e | General use | 340 | 571 | 728 | Specialty: | Air flask | 340 | 571 | 728 | Antenna | 530 | 1,439 | Antifoulant | 400 | 765 | 971 | Heat resistant | 420 | 841 | 1,069 | High-gloss | 420 | 841 | 1,069 | High-temperature | 500 | 1,237 | 1,597 | Inorganic zinc high-build | 340 | 571 | 728 | Military exterior | 340 | 571 | 728 | Mist | 610 | 2,235 | Navigational aids | 550 | 1,597 | Nonskid | 340 | 571 | 728 | Nuclear | 420 | 841 | 1,069 | Organic zinc | 360 | 630 | 802 | Pretreatment wash primer | 780 | 11,095 | Repair and maint. of thermoplastics | 550 | 1,597 | Rubber camouflage | 340 | 571 | 728 | Sealant for thermal spray aluminum | 610 | 2,235 | Special marking | 490 | 1,178 | Specialty interior | 340 | 571 | 728 | Tack coat | 610 | 2,235 | Undersea weapons systems | 340 | 571 | 728 | Weld-through precon. primer | 650 | 2,885 |
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a The limits are expressed in two sets of equivalent units. Either set of limits may be used for the compliance procedure described in § 63.785(c)(1), but only the limits expressed in units of g/L solids (nonvolatiles) shall be used for the compliance procedures described § 63.785(c) (2) through (4).
b VOC (including exempt compounds listed as HAP) shall be used as a surrogate for VOHAP for those compliance procedures described in § 63.785(c) (1) through (3).
c To convert from g/L to lb/gal, multiply by (3.785 L/gal)(1/453.6 lb/g) or 1/120. For compliance purposes, metric units define the standards.
d VOHAP limits expressed in units of mass of VOHAP per volume of solids were derived from the VOHAP limits expressed in units of mass of VOHAP per volume of coating assuming the coatings contain no water or exempt compounds and that the volumes of all components within a coating are additive.
e These limits apply during cold-weather time periods, as defined in § 63.782. Cold-weather allowances are not given to coatings in categories that permit less than 40 percent volume solids (nonvolatiles). Such coatings are subject to the same limits regardless of weather conditions.