Coating manufacturing operations including raw material storage, weighing,
mixing, milling, grinding, thinning, and packaging are permitted by rule,
provided the conditions of this section are met. Coating manufacturing is
defined as combining ingredients that are manufactured off-site to make paints,
varnishes, sealants, stains, adhesives, inks, pigments, maskants, and paint
strippers, etc. Resin manufacturing is not permitted by rule under this section.
(1) Materials usage shall not exceed the following rates:
(A) 345,000 gallons per year of solvent for all operations
at a coating manufacturing site; and
(B) 200,000 pounds of dry powder per year for all operations
at a coating manufacturing site.
(2) Operations involving powders which contain more
than 0.1% by weight of chromium, cadmium, asbestos, lead, arsenic, cobalt,
or strontium are not authorized by this section.
(3) The following conditions must be met to prevent and
control emissions.
(A) There shall be no visible emissions from any emission point.
(B) Bags or sacks of dry powders shall be opened within an
enclosed bag slitter or within an enclosed area.
(C) Material transfer, storage operations, or other similar
operations shall be conducted in enclosed or covered containers which are
opened only as necessary for transfer of ingredients.
(D) Mixing, milling, packaging, and filling operations shall
be conducted under a hood or within an enclosure designed to capture emissions,
which shall then be vented externally or through a carbon adsorption system.
(E) Operations which involve dry powders or pigments shall
be vented through a filter.
(F) Any spills of dry powders or solvents shall be cleaned
up promptly in a manner designed to control emissions.
(G) Waste materials shall be stored in covered containers and
disposed of properly.
(4) Emissions from any operation which are vented
externally shall be exhausted using forced air through a stack with an unobstructed
vertical discharge. The stack must be, at a minimum, four feet above the peak
of the roofline.
(5) The owner or operator of the facility shall keep records
of all liquid and solid material usage rates on a monthly basis to demonstrate
compliance with paragraph (1) of this section. The usage data shall be maintained
for the most recent 24-month period.
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