VBG,D5 = VBG-VBG,D3/7
Where:
VBG,D5 = The batch volume of biogas for an approved pathway with a D code of 5 for the calendar month, in Btu HHV. If the result of this equation is negative, then VBG,D5,p equals 0.
VBG = The total volume of biogas produced by the mixed digester for the calendar month, in Btu HHV, as measured under paragraph (f)(2)(iii)(A) of this section.
VBG,D3/7 = The total batch volume of biogas produced under approved pathways with a D code of 3 or 7 for the calendar month, in Btu HHV, per paragraph (j)(2)(ii) of this section.
VBG,D3/7,p = BED3/7,i
VBG,D3/7,p = The batch volume of biogas for batch pathway p with a D code of 3 or 7 for the calendar month, in Btu HHV.
BED3/7,i = The total energy from cellulosic biogas feedstock i that forms energy in the biogas and whose batch pathway has been assigned a D code of 3 or 7 for the calendar month, in Btu HHV, per paragraph (j)(2)(iii) of this section.
BED3/7,i,j = Mi,j * TSi,j * VSi,j * CFi,j
Where:
BED3/7,i,j = The amount of energy from cellulosic biogas feedstock i that forms energy in the biogas and whose batch pathway has been assigned a D code of 3 or 7 on day j, in Btu HHV.
Mi,j = Mass of cellulosic biogas feedstock i, in pounds, measured on day j, per paragraph (f)(2)(iii)(B) of this section.
TSi,j = Total solids of cellulosic biogas feedstock i, as a mass fraction, in pounds total solids per pound feedstock, for the sample obtained on day j, per paragraph (f)(2)(iii)(C) of this section. If sample results are not available, then TSi,j equals 0.
VSi,j = Volatile solids of cellulosic biogas feedstock i, as a mass fraction, in pounds volatile solids per pound total solids, for the sample obtained on day j, per paragraph (f)(2)(iii)(C) of this section. If sample results are not available, then VSi,j equals 0.
CFi,j = Converted fraction in annual average Btu HHV/lb, representing the portion of cellulosic biogas feedstock i that is converted to biomethane by the producer on day j, per paragraph (j)(2)(iv) of this section. If data for digester operating conditions required under paragraph (f)(2)(iii)(D) of this section are outside the range of operating conditions specified in paragraph (j)(2)(v) of this section or such data to determine the operating conditions does not meet the requirements in § 80.155(d) , then CFi,j equals 0.
40 C.F.R. §80.105