# 98.423 Calculating CO supply.
(a) Except as allowed in paragraph (b) of this section, calculate the annual mass of CO<sub>2</sub> captured, extracted, imported, or exported through each flow meter in accordance with the procedures specified in either paragraph (a)(1) or (a)(2) of this section. If multiple flow meters are used, you shall calculate the annual mass of CO<sub>2</sub> for all flow meters according to the procedures specified in paragraph (a)(3) of this section.
(1) For each mass flow meter, you shall calculate quarterly the mass of CO<sub>2</sub> in a CO<sub>2</sub> stream in metric tons by multiplying the mass flow by the composition data, according to Equation PP-1 of this section. Mass flow and composition data measurements shall be made in accordance with § 98.424 of this subpart.
Where:
CO<sub>2,u</sub> = Annual mass of CO<sub>2</sub> (metric tons) through flow meter u.
C<sub>CO</sub>*2*<sub>,p,u</sub> = Quarterly CO<sub>2</sub> concentration measurement in flow for flow meter u in quarter p (wt. %CO<sub>2</sub>).
Q<sub>p,u</sub> = Quarterly mass flow rate measurement for flow meter u in quarter p (metric tons).
p = Quarter of the year.
u = Flow meter.
(2) For each volumetric flow meter, you shall calculate quarterly the mass of CO<sub>2</sub> in a CO<sub>2</sub> stream in metric tons by multiplying the volumetric flow by the concentration and density data, according to Equation PP-2 of this section. Volumetric flow, concentration and density data measurements shall be made in accordance with § 98.424 of this section.
Where:
CO<sub>2,u</sub> = Annual mass of CO<sub>2</sub> (metric tons) through flow meter u.
C<sub>CO2,p</sub> = Quarterly CO<sub>2</sub> concentration measurement in flow for flow meter u in quarter p (measured as either volume % CO<sub>2</sub> or weight % CO<sub>2</sub>).
Q<sub>p</sub> = Quarterly volumetric flow rate measurement for flow meter u in quarter p (standard cubic meters).
D<sub>p</sub> = Density of CO<sub>2</sub> in quarter p (metric tons CO<sub>2</sub> per standard cubic meter) for flow meter u if C<sub>CO2,p</sub> is measured as volume % CO<sub>2</sub>, or density of the whole CO<sub>2</sub> stream for flow meter u (metric tons per standard cubic meter) if C<sub>CO2,p</sub> is measured as weight % CO<sub>2</sub>.
p = Quarter of the year.
u = Flow meter.
(3) To aggregate data, use either Equation PP-3a or PP-3b in this paragraph, as appropriate.
(i) For facilities with production process units, DAC process units, or production wells that capture or extract a CO<sub>2</sub> stream and either measure it after segregation or do not segregate the flow, calculate the total CO<sub>2</sub> supplied in accordance with equation PP-3a to paragraph (a)(3)(i) of this section.
where:
CO<sub>2</sub> = Total annual mass of CO<sub>2</sub> (metric tons).
CO<sub>2,u</sub> = Annual mass of CO<sub>2</sub> (metric tons) through flow meter u.
u = Flow meter.
(ii) For facilities with production process units or DAC process units that capture a CO<sub>2</sub> stream and measure it ahead of segregation, calculate the total CO<sub>2</sub> supplied in accordance with equation PP-3b to paragraph (a)(3)(ii) of this section.
where:
CO<sub>2</sub> = Total annual mass of CO<sub>2</sub> (metric tons).
CO<sub>2,u</sub> = Annual mass of CO<sub>2</sub> (metric tons) through main flow meter u.
CO<sub>2,v</sub> = Annual mass of CO<sub>2</sub> (metric tons) through subsequent flow meter v for use on site.
u = Main flow meter.
v = Subsequent flow meter.
(b) As an alternative to paragraphs (a)(1) through (3) of this section for CO<sub>2</sub> that is supplied in containers, calculate the annual mass of CO<sub>2</sub> supplied in containers delivered by each CO<sub>2</sub> stream in accordance with the procedures specified in either paragraph (b)(1) or (b)(2) of this section. If multiple CO<sub>2</sub> streams are used to deliver CO<sub>2</sub> to containers, you shall calculate the annual mass of CO<sub>2</sub> supplied in containers delivered by all CO<sub>2</sub> streams according to the procedures specified in paragraph (b)(3) of this section.
(1) For each CO<sub>2</sub> stream that delivers CO<sub>2</sub> to containers, for which mass is measured, you shall calculate CO<sub>2</sub> supply in containers using Equation PP-1 of this section.
where:
CO<sub>2,u</sub> = Annual mass of CO<sub>2</sub> (metric tons) supplied in containers delivered by CO<sub>2</sub> stream u.
C<sub>CO2,p,u</sub> = Quarterly CO<sub>2</sub> concentration measurement of CO<sub>2</sub> stream u that delivers CO<sub>2</sub> to containers in quarter p (wt. %CO<sub>2</sub>).
Q<sub>p,u</sub> = Quarterly mass of contents supplied in all containers delivered by CO<sub>2</sub> stream u in quarter p (metric tons).
p = Quarter of the year.
u = CO<sub>2</sub> stream that delivers to containers.
(2) For each CO<sub>2</sub> stream that delivers to containers, for which volume is measured, you shall calculate CO<sub>2</sub> supply in containers using Equation PP-2 of this section.
where:
CO<sub>2,u</sub> = Annual mass of CO<sub>2</sub> (metric tons) supplied in containers delivered by CO<sub>2</sub> stream u.
C<sub>CO2,p</sub> = Quarterly CO<sub>2</sub> concentration measurement of CO<sub>2</sub> stream u that delivers CO<sub>2</sub> to containers in quarter p (measured as either volume % CO<sub>2</sub> or weight % CO<sub>2</sub>).
Q<sub>p</sub> = Quarterly volume of contents supplied in all containers delivered by CO<sub>2</sub> stream u in quarter p (standard cubic meters).
D<sub>p</sub> = Quarterly CO<sub>2</sub> density determination for CO<sub>2</sub> stream u in quarter p (metric tons per standard cubic meter) if CO<sub>2</sub>,<sub>p</sub> is measured as volume % CO<sub>2</sub>, or density of CO<sub>2</sub> stream u (metric tons per standard cubic meter) if CO<sub>2,p</sub> is measured as weight % CO<sub>2</sub>.
p = Quarter of the year.
u = CO<sub>2</sub> stream that delivers to containers.
(3) To aggregate data, sum the mass of CO<sub>2</sub> supplied in containers delivered by all CO<sub>2</sub> streams in accordance with Equation PP-3a of this section.
where:
CO<sub>2</sub> = Annual mass of CO<sub>2</sub> (metric tons) supplied in containers delivered by all CO<sub>2</sub> streams.
CO<sub>2,u</sub> = Annual mass of CO<sub>2</sub> (metric tons) supplied in containers delivered by CO<sub>2</sub> stream u.
u = CO<sub>2</sub> stream that delivers to containers.
(c) Importers or exporters that import or export CO<sub>2</sub> in containers shall calculate the total mass of CO<sub>2</sub> imported or exported in metric tons based on summing the mass in each CO<sub>2</sub> container using weigh bills, scales, or load cells according to Equation PP-4 of this section.
where:
CO<sub>2</sub> = Annual mass of CO<sub>2</sub> (metric tons).
Q = Annual mass in all CO<sub>2</sub> containers imported or exported during the reporting year (metric tons).
[74 FR 56374, Oct. 30, 2009, as amended at 75 FR 79169, Dec. 17, 2010; 78 FR 71977, Nov. 29, 2013; 89 FR 31943, Apr. 25, 2024]