[Comment: For dates of non-regulatory government publications,
publications of recognized organizations and associations, federal rules, and
federal statutory provisions referenced in this rule, see paragraph (AA) of
rule 3745-113-01 of the
Administrative Code titled "referenced materials."]
(A)
Calculation of
VOC content: For the purpose of determining compliance with the VOC
content limits in the table of paragraph (A)(1) of rule
3745-113-03 of the
Administrative Code, the VOC content of a coating shall be determined
by using the procedures described in paragraph
(A)(1)(a) or (A)(1)(b) of this rule, as appropriate. The VOC content of a tint
base shall be determined without colorant that is added after the tint base is
manufactured
as defined in rule
3745-113-01 of the
Administrative Code. The VOC content of a tint base is determined without
colorant that is added after the tint base is manufactured. If the manufacturer
does not recommend thinning, the VOC content is calculated for the product as
supplied. If the manufacturer recommends thinning, the VOC content is
calculated including the maximum amount of thinning solvent recommended by
manufacturer. If the coating is a multi-component product, display the VOC
content as mixed or catalyzed on the container. If the coating contains
silanes, siloxanes, or other ingredients that generate ethanol or other VOCs
during the curing process, the VOC content includes the VOCs emitted during
curing.
(1) Calculation of VOC
content.
(a) With the exception of low solids
coatings, determine the VOC content in grams of VOC per liter of coating
thinned to the manufacturer's maximum recommendation, excluding the volume of
any water and exempt compounds. Determine the VOC content using the following
equation:
VOC content = (Ws Ww -Wec)/(Vm -Vw
-Vec)
where:
VOC content = grams of VOC per liter
of coating
Ws = weight of volatiles, in
grams
Ww = weight of water, in
grams
Wec = weight of exempt compounds,
in grams
Vm = volume of coating, in
liters
Vw = volume of water, in
liters
Vec = volume of exempt compounds,
in liters
(b) For low solids coatings,
determine the VOC content in units of grams of VOC per liter of coating thinned
to the manufacturer's maximum recommendation, including the volume of any water
and exempt compounds. Determine the VOC content using the following
equation:
VOC content (ls) = (Ws - Ww -
Wec)/(Vm)
where:
VOC content (ls) = the VOC content
of a low solids coating in grams per liter of coating
Ws = weight of volatiles, in
grams
Ww = weight of water, in
grams
Wec = weight of exempt compounds,
in grams
Vm = volume of coating, in
liters
(2)(B) VOC content of
coatings: To determine the physical properties of a coating
in order to perform the calculations in paragraph
(A)(1) of this rule, the reference method for VOC content is USEPA
method 24, except as provided in paragraphs (A)(3)
(C) and
(A)(4)
(D) of
this rule. An alternative method to determine the VOC content of coatings is
SCAQMD method 304-91. The exempt compounds content shall be determined by
methods referenced in ASTM D 3960, SCAQMD method
303-91 (Revised August 1996), BAAQMD method 43, or
BAAQMD method 41, as applicable. To determine the VOC content of a
coating, the manufacturer may use USEPA method 24, or an alternative method, as
provided in paragraph (A)(3)
(C) of this rule, formulation data, or any other
reasonable means for predicting that the coating has been formulated as
intended (e.g., quality assurance checks, recordkeeping). However, if there are
any inconsistencies between the results of a test conducted utilizing USEPA
method 24 and any other means for determining VOC content, the results of the
test utilizing USEPA method 24 will govern, except when an alternative method
is approved as specified in paragraph (A)(3)
(C) of this
rule. The director may require the manufacturer to conduct an analysis using
USEPA method 24.
(3)(C) Alternative test
methods: Other test methods demonstrated to provide results that are acceptable
for purposes of determining compliance with paragraph
(A)(2)
(B) of
this rule, after review and approval in writing by the director and the USEPA,
may also be used.
(4)(D) Methacrylate
traffic coating markings: Analysis of methacrylate multi-component coatings
used as traffic marking coatings shall be conducted according to a modification
of USEPA method 24 contained in 40 CFR
59, Subpart D, Appendix A. This method
has not been approved for methacrylate multicomponent coatings used for
purposes other than as traffic marking coatings or for other classes of
multicomponent coatings.
