A.
Calculation of VOC Content.
(1) For the
purpose of determining compliance with the VOC content limits in Table 1 of
Regulation .05 of this chapter, the VOC content of a coating shall be
determined using the following procedures, as applicable:
(a) With the exception of low solids
coatings, determine the VOC content (regulatory) in grams of VOC per liter of
coating thinned to the manufacturer's maximum recommendation, excluding the
volume of any water and exempt compounds using the following equation:
VOC Regulatory = (Ws-Ww- Wee) /(Vm-Vw- Vec) Where:
VOC Regulatory = grams of VOC per liter of coating;
Ws = weight of volatiles, in grams;
Ww = weight of water, in grams;
Wee = weight of exempt compounds, in grams;
Vm = volume of coating, in liters;
Vw = volume of water, in liters; and
Vec = volume of exempt compounds, in liters.
(b) For low solids coatings,
determine the VOC content (actual) 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 using the following equation:
VOC Actual = (Ws-Ww- Wee) / (Vm) Where:
VOC Actual = the VOC content of a low solids coating, in
grams per liter of coating;
Ws = weight of volatile, in grams;
Ww = weight of water, in grams;
Wec = weight of exempt compounds, in grams; and
Vm = volume of coating, in liters.
(2) The VOC content of a tint base
shall be determined without colorant that is added after the tint base is
manufactured.
(3) If the
manufacturer does not recommend thinning, the VOC content shall be calculated
for the product as supplied.
(4) If
the manufacturer recommends thinning, the VOC content shall be calculated
including the maximum amount of thinning solvent recommended by
manufacturer.
(5) If the coating is
a multi-component product, the VOC content shall be calculated as mixed or
catalyzed.
(6) If the coating
contains silanes, siloxanes, or other ingredients that generate ethanol or
other VOCs during the curing process, the VOC content shall include the VOCs
emitted during curing.
B. VOC Content of Coatings.
(1) Except as provided in §C of this
regulation, a person shall determine the VOC content of a coating using one of
the test methods listed in Regulation .02 of this chapter, or an alternative
method approved by the Department.
(2) If there are any inconsistencies between
the results of EPA Method 24 test and any other means for determining VOC
content, the EPA Method 24 test results will govern.
(3) The exempt compounds content shall be
determined by one of the test methods listed in Regulation .02 of the chapter,
as applicable.
C.
Methacrylate Traffic Coating Markings. Analysis of methacrylate multicomponent
coatings used as traffic marking coatings shall be conducted according to a
modification of U.S. EPA Method 24 ( 40 CFR
59, subpart D, Appendix A). This
method has not been approved for methacrylate multicomponent coatings used for
other purposes than as traffic marking coatings or for other classes of
multicomponent coatings.
