250 R.I. Code R. 250-RICR-120-05-19.13
Equation 1
Where:
VOC = The VOC content of a given coating, in pounds per gallon (lbs./gal);
Wv = Mass of total volatiles, in pounds;
Wa = Mass of total VOC in additives or other materials that are added to the coating prior to its application, in pounds;
Ww = Mass of the water in coating (if any), in pounds;
Wn = Mass of any non-VOC solvent in the coating, in pounds;
V = Volume of coating, in gallons;
Va = Volume of VOC-containing additives or other materials that are added to the coating prior to its application, in gallons;
Vw = Volume of the water in coating (if any), in gallons; and
Vn = Volume of any non-VOC solvent in the coating, in gallons.
Equation 2
Where:
VOCB = VOC content in lbs. VOC/lb of coating solids
Wo = Weight percent of VOC (Wv-Ww-Wex)
Wv = Weight percent of total volatiles (100%-weight percent solids)
Ww = Weight percent of water
Wex = Weight percent of exempt solvents
Wn = Weight percent of solids of the as applied coating
Equation 3
Where:
VOC = VOC Content in lbs. voc/gal of coating solids
Wo = Weight percent of VOC (Wv-Ww-Wex)
Wv = Weight percent of total volatiles (100%-weight percent solids)
Ww = Weight percent of water
Wex = Weight percent of exempt solvents
DC = Density of coating, lb/gal, at 25°C
Vn = Volume percent of solids of the as applied coating
Equation 4
Where:
VOCw = The daily-weighted average VOC content of the coatings, as applied, used on a coating line or operation in units of pounds of VOC per gallon of coating, excluding water and exempt compounds;
n = The number of different coatings, as applied, each day on a coating line or operation;
Vi = The volume of each coating (i), as applied, used in a day on a coating line or operation in units of gallons, excluding water and exempt compounds;
Ci = The VOC content of each coating (i), as applied, used in a day on a coating line or operation in units of pounds VOC per gallon of coating, excluding water and exempt compounds; and,
VT = The total volume of all coating, as applied, used in a day on a coating line or operation in units of gallons, excluding water and exempt compounds.
Equation 5
VOCws = The daily-weighted average VOC content, as applied, of the coatings used on a coating line or operation in units of mass of VOC per unit volume of coating solids;
n = The number of different coatings, as applied, used in a day on a coating line or operation;
Vi = The volume of each coating (i), as applied, used in a day on a coating line or operation in units of gallons,
WVOCi = The weight fraction of VOC in each coating (i), as applied, used in a day on a coating line or operation in units of pounds VOC per pound of coating;
Di = The density of each coating (i) as applied, used in a day on a coating line or operation in units of pounds VOC per gallon of coating (lb./gal); and
VSi = The volume fraction solids content of each coating (i), as applied, used in a day on a coating line or operation in units of gallons solids/gallons coating.
250 R.I. Code R. 250-RICR-120-05-19.13