where:
Wi = Weight of the "i"th VOC compound, grams.
Ww = Weight of water, grams.
We = Weight of non-HAP, nonVOC compound, grams.
MWi = Molecular weight of the "i"th VOC compound, g/g-mole.
MWw = Molecular weight of water, g/g-mole.
MWe = Molecular weight of exempt compound, g/g-mole.
PPc = VOC composite partial pressure at 20 °C, mm Hg.
VPi = Vapor pressure of the "i"th VOC compound at 20 °C, mm Hg.
When Method 24 is used to determine the VOC content of water-reducible coatings, the precision adjustment factors in Reference Method 24 shall be used. If the adjusted analytical VOC content is less than the formulation solvent content, then the analytical VOC content should be set equal to the formulation solvent content.
where:
Vwi = volume (gal) of water in one gal of coating i.
Dci = density (lb of coating per gal of coating) of coating i.
Wwi = weight fraction (expressed as a decimal) of water in coating i.
Dw = density of water, 8.33 lb/gal.
where:
MHi = mass (lb) of organic HAP in one gal of coating i.
Dci = density (lb of coating per gal of coating) of coating i.
WHi = weight fraction (expressed as a decimal) of organic HAP in coating i.
where:
Hi = mass of organic HAP emitted per volume of coating i (lb/gal) less water as applied.
MHi = mass (lb) of organic HAP in one gal of coating i.
Vwi = volume (gal) of water in one gal of coating i.
where:
Ha = volume-weighted average mass of organic HAP emitted per unit volume of coating (lb/gal) (less water) as applied during each 30-day period for those coatings being averaged.
n = number of coatings being averaged.
WHi = weight fraction (expressed as a decimal) of organic HAP in coating i as applied that is being averaged during each 30-day period.
Dci = density (lb of coating per gal of coating) of coating i as applied that is being averaged during each 30-day period.
Vci = volume (gal) of coating i as applied that is being averaged during the 30-day period.
Clw = total volume (gal) of all coatings (less water) as applied that are being averaged during each 30-day period.
When Method 24 is used to determine the VOC content of water-reducible coatings, the precision adjustment factors in Reference Method 24 shall be used. If the adjusted analytical VOC content is less than the formulation solvent content, then the analytical VOC content should be set equal to the formulation solvent content.
where:
Vwi = volume (gal) of water in one gal of coating i.
Dci = density (lb of coating per gal of coating) of coating i.
Wwi = weight fraction (expressed as a decimal) of water in coating i.
Dw = density of water, 8.33 lb/gal.
where:
MVi = mass (lb) of VOC in one gal of coating i.
Dci = density (lb of coating per gal of coating) of coating i.
WVi = weight fraction (expressed as a decimal) of VOC in coating i.
where:
Gi = mass of VOC emitted per volume of coating i (lb/gal) (less water and exempt solvents) as applied.
MVi = mass (lb) of VOC in one gal of coating i.
Vwi = volume (gal) of water in one gal of coating i.
VXi = volume (gal) of exempt solvents in one gal of coating i.
where:
Ga = volume weighted average mass of VOC per unit volume of coating (lb/gal) (less water and exempt solvents) as applied during each 30-day period for those coatings being averaged.
n = number of coatings being averaged.
(VOC)ci = VOC content (lb/gal) of coating i (less water and exempt solvents) as applied (as determined using the procedures specified in paragraph (f)(1) of this section) that is being averaged during the 30-day period.
Vci = volume (gal) of coating i (less water and exempt solvents) as applied that is being averaged during the 30-day period.
Clwes = total volume (gal) of all coatings (less water and exempt solvents) as applied during each 30-day period for those coatings being averaged.
where:
Ek = overall VOC and/or organic HAP control efficiency (expressed as a decimal) of control system k.
Rk = destruction or removal efficiency (expressed as a decimal) of total organic compounds or total organic HAP for control device k as determined under paragraph (h)(2) of this section.
Fk = capture efficiency (expressed as a decimal) of capture system k as determined under paragraph (h)(3) of this section.
where:
Ei, Eo = mass rate of TOC (minus methane and ethane) or total organic HAP at the inlet and outlet of the control device, respectively, dry basis, kg/hr.
K2 = constant, 2.494 * 10-6 (parts per million)-1 (gram-mole per standard cubic meter) (kilogram/gram) (minute/hour), where standard temperature for (gram-mole per standard cubic meter) is 20 °C.
n = number of sample components in the gas stream.
Cij, Coj = concentration of sample component j of the gas stream at the inlet and outlet of the control device, respectively, dry basis, parts per million by volume.
Mij, Moj = molecular weight of sample component j of the gas stream at the inlet and outlet of the control device, respectively, gram/gram-mole.
Qi, Qo = flow rate of gas stream at the inlet and outlet of the control device, respectively, dry standard cubic meter per minute.
where:
R = destruction or removal efficiency of control device, percent.
Ei = mass rate of TOC (minus methane and ethane) or total organic HAP at the inlet to the control device as calculated under paragraph (h)(2)(iv)(B) of this section, kg TOC per hour or kg organic HAP per hour.
Eo = mass rate of TOC (minus methane and ethane) or total organic HAP at the outlet of the control device, as calculated under paragraph (h)(2)(iv)(B) of this section, kg TOC per hour or kg organic HAP per hour.
where:
P = organic HAP or VOC emission reduction, percent.
Eb = organic HAP or VOC emissions, in pounds, before the alternative application technique was implemented, as determined under paragraph (i)(2)(i) of this section.
Ea = organic HAP of VOC emissions, in pounds, after the alternative application technique was implemented, as determined under paragraph (i)(2)(ii) of this section.
where:
C = annual average volume (gal per aircraft) of organic HAP-containing chemical stripper used for spot stripping and decal removal.
n = number of organic HAP-containing chemical strippers used in the annual period.
Vsi = volume (gal) of organic HAP-containing chemical stripper (i) used during the annual period.
A = number of aircraft for which depainting operations began during the annual period.
where:
C = annual average weight (lb per aircraft) of organic HAP (chemical stripper) used for spot stripping and decal removal.
m = number of organic HAP contained in each chemical stripper, as applied.
n = number of organic HAP-containing chemical strippers used in the annual period.
Whi = weight fraction (expressed as a decimal) of each organic HAP (i) contained in the chemical stripper, as applied, for each aircraft depainted.
Dhi = density (lb/gal) of each organic HAP-containing chemical stripper (i), used in the annual period.
Vsi = volume (gal) of organic HAP-containing chemical stripper (i) used during the annual period.
A = number of aircraft for which depainting operations began during the annual period.
When Method 24 is used to determine the VOC content of water-reducible coatings, the precision adjustment factors in Reference Method 24 shall be used. If the adjusted analytical VOC content is less than the formulation solvent content, then the analytical VOC content should be set equal to the formulation solvent content.
where:
Ha = volume-weighted mass of organic HAP emitted per unit volume of chemical milling maskants (lb/gal) (less water) as applied during each 30-day period for those chemical milling maskants being averaged.
n = number of chemical milling maskants being averaged.
WHi = weight fraction (expressed as a decimal) of organic HAP in chemical milling maskant i (less water) as applied during each 30-day period that is averaged.
Dmi = density (lb chemical milling maskant per gal coating) of chemical milling maskant i as applied during each 30-day period that is averaged.
Vmi = volume (gal) of chemical milling maskant i (less water) as applied during the 30-day period that is averaged.
Mlw = total volume (gal) of all chemical milling maskants (less water) as applied during each 30-day period that is averaged.
where:
Ga = volume-weighted average mass of VOC per unit volume of chemical milling maskant (lb/gal) (less water and exempt solvents) as applied during each 30-day period for those chemical milling maskants that are averaged.
n = number of chemical milling maskants being averaged.
(VOC)mi = VOC content (lb/gal) of chemical milling maskant i (less water and exempt solvents) as applied during the 30-day period that is averaged.
Vmi = volume (gal) of chemical milling maskant i (less water and exempt solvents) as applied during the 30-day period that is averaged.
Mlwes = total volume (gal) of all chemical milling maskants (less water and exempt solvents) as applied during each 30-day period that is averaged.
40 C.F.R. §63.750