(a) The mass of HFC-23 generated from each HCFC-22 production process shall be estimated by using one of two methods, as applicable:
(1) Where the mass flow of the combined stream of HFC-23 and another reaction product (e.g., HCl) is measured, multiply the weekly (or more frequent) HFC-23 concentration measurement (which may be the average of more frequent concentration measurements) by the weekly (or more frequent) mass flow of the combined stream of HFC-23 and the other product. To estimate annual HFC-23 production, sum the weekly (or more frequent) estimates of the quantities of HFC-23 produced over the year. This calculation is summarized in Equation O-1 of this section:[GRAPHIC] [TIFF OMITTED] TR30OC09.051 Where: G23 = Mass of HFC-23 generated annually (metric tons).c23 = Fraction HFC-23 by weight in HFC-23/other product
stream.Fp = Mass flow of HFC-23/other product stream during the
period p (kg).p = Period over which mass flows and concentrations are measured.n = Number of concentration and flow measurement periods for the year.10-3 = Conversion factor from kilograms to metric tons.
(2) Where the mass of only a reaction product other than HFC-23 (either HCFC-22 or HCl) is measured, multiply the ratio of the weekly (or more frequent) measurement of the HFC-23 concentration and the weekly (or more frequent) measurement of the other product concentration by the weekly (or more frequent) mass produced of the other product. To estimate annual HFC-23 production, sum the weekly (or more frequent) estimates of the quantities of HFC-23 produced over the year. This calculation is summarized in Equation O-2 of this section, assuming that the other product is HCFC-22. If the other product is HCl, HCl may be substituted for HCFC-22 in Equations O-2 and O-3 of this section.[GRAPHIC] [TIFF OMITTED] TR30OC09.052 Where: G23 = Mass of HFC-23 generated annually (metric tons).c23 = Fraction HFC-23 by weight in HCFC-22/HFC-23 stream.c22 = Fraction HCFC-22 by weight in HCFC-22/HFC-23 stream.P22 = Mass of HCFC-22 produced over the period p (kg),
calculated using Equation O-3 of this section.p = Period over which masses and concentrations are measured.n = Number of concentration and mass measurement periods for the year.10-3 = Conversion factor from kilograms to metric tons.
(b) The mass of HCFC-22 produced over the period p shall be estimated by using Equation O-3 of this section:[GRAPHIC] [TIFF OMITTED] TR30OC09.053 Where: P22 = Mass of HCFC-22 produced over the period p (kg).O22 = mass of HCFC-22 that is measured coming out of the
Production process over the period p (kg).U22 = Mass of used HCFC-22 that is added to the production
process upstream of the output measurement over the period p
(kg).LF = Factor to account for the loss of HCFC-22 upstream of the
measurement. The value for LF shall be determined pursuant to
Sec. 98.154(e).
(c) For HCFC-22 production facilities that do not use a destruction device or that have a destruction device that is not directly connected to the HCFC-22 production equipment, HFC-23 emissions shall be estimated using Equation O-4 of this section:[GRAPHIC] [TIFF OMITTED] TR30OC09.054 Where: E23 = Mass of HFC-23 emitted annually (metric tons).G23 = Mass of HFC-23 generated annually (metric tons).S23 = Mass of HFC-23 sent off site for sale annually (metric
tons).OD23 = Mass of HFC-23 sent off site for destruction (metric
tons).D23 = Mass of HFC-23 destroyed on site (metric tons).I23 = Increase in HFC-23 inventory = HFC-23 in storage at end
of year--HFC-23 in storage at beginning of year (metric tons).
(d) For HCFC-22 production facilities that use a destruction device connected to the HCFC-22 production equipment, HFC-23 emissions shall be estimated using Equation O-5 of this section:[GRAPHIC] [TIFF OMITTED] TR30OC09.055 Where: E23 = Mass of HFC-23 emitted annually (metric tons).EL = Mass of HFC-23 emitted annually from equipment leaks,
calculated using Equation O-6 of this section (metric tons).EPV = Mass of HFC-23 emitted annually from process vents,
calculated using Equation O-7 of this section (metric tons).ED = Mass of HFC-23 emitted annually from destruction device
(metric tons), calculated using Equation O-8 of this section.
(1) The mass of HFC-23 emitted annually from equipment leaks (for use in Equation O-5 of this section) shall be estimated by using Equation O-6 of this section:[GRAPHIC] [TIFF OMITTED] TR30OC09.056 Where: EL = Mass of HFC-23 emitted annually from equipment leaks
(metric tons).c23 = Fraction HFC-23 by weight in the stream(s) in the
equipment.FGt = The applicable leak rate specified in Table O-1 of this
subpart for each source of equipment type and service t with a
screening value greater than or equal to 10,000 ppmv (kg/hr/
source).NGt = The number of sources of equipment type and service t
with screening values greater than or equal to 10,000 ppmv as
determined according to Sec. 98.154(i).FLt = The applicable leak rate specified in Table O-1 of this
subpart for each source of equipment type and service t with a
screening value of less than 10,000 ppmv (kg/hr/source).NLt = The number of sources of equipment type and service t
with screening values less than 10,000 ppmv as determined
according to Sec. 98.154(j).p = One hour.n = Number of hours during the year during which equipment contained
HFC-23.t = Equipment type and service as specified in Table O-1 of this
subpart.10-3 = Factor converting kg to metric tons.
(2) The mass of HFC-23 emitted annually from process vents (for use in Equation O-5 of this section) shall be estimated by using Equation O-7 of this section:[GRAPHIC] [TIFF OMITTED] TR30OC09.057 Where: EPV = Mass of HFC-23 emitted annually from process vents
(metric tons).ERT = The HFC-23 emission rate from the process vents during
the period of the most recent test (kg/hr).PRp = The HCFC-22 production rate during the period p (kg/
hr).PRT = The HCFC-22 production rate during the most recent test
period (kg/hr).lp = The length of the period p (hours).10-3 = Factor converting kg to metric tons.n = The number of periods in a year.
(3) The total mass of HFC-23 emitted from destruction devices shall be estimated by using Equation O-8 of this section:[GRAPHIC] [TIFF OMITTED] TR30OC09.058 Where: ED = Mass of HFC-23 emitted annually from the destruction
device (metric tons).FD = Mass of HFC-23 fed into the destruction device annually
(metric tons).D23 = Mass of HFC-23 destroyed annually (metric tons).
(4) For facilities that destroy HFC-23, the total mass of HFC-23 destroyed shall be estimated by using Equation O-9 of this section:[GRAPHIC] [TIFF OMITTED] TR30OC09.059 Where: D23. = Mass of HFC-23 destroyed annually (metric tons).FD = Mass of HFC-23 fed into the destruction device annually
(metric tons).DE = Destruction Efficiency of the destruction device (fraction). [74 FR 56374, Oct. 30, 2009, as amended at 78 FR 71955, Nov. 29, 2013]