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.
