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 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. [60 FR 64336, Dec. 15, 1995, as amended at 61 FR 66228, Dec. 17, 1996; 76 FR 72070, Nov. 21, 2011]