Where:
VOC content = grams of VOC per liter of coating;
Wv = mass of total volatiles, in grams;
Ww = mass of water, in grams;
Wec = mass of exempt compounds, in grams;
V = volume of coating, in liters;
Vw = volume of water, in liters; and
Vec = volume of exempt compounds, in liters.
Where:
VOCmulti = VOC content of a multi-stage topcoat, in grams of VOC per liter of coating;
VOCbc = VOC content of the basecoat, as determined in paragraph (a)(1) or (f) of this section;
VOCmci = VOC content of midcoat i, as determined in paragraph (a)(1) or (f) of this section;
VOCcc = VOC content of the clearcoat, as determined in paragraph (a)(1) or (f) of this section; and
M = Number of midcoats.
40 C.F.R. §59.104