26.11.39.08

.08 Compliance Procedures.

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 - Wec) / (Vm - Vw - Vec)

VOC Regulatory = 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; 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 - Wec) / (Vm)

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.