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REGULATION FOR THE MANDATORY REPORTING OF GREENHOUSE GAS EMISSIONS - page 71 / 137

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Where: CH4 = methane emissions (metric tonnes/year) n = number of screenings/year

E E

VOC-0 VOC-LC = zero component VOC emissions (kg/screening period) = leaking component VOC emissions (kg/screening

period)

EVOCP-10

= VOC emissions for components pegged over 9,999

ppmv (kg/screening period) EVOCP-100 = VOC emissions for components pegged over 99,999

ppmv (kg/screening period) CFVOC = VOC to CH4 conversion factor (default CFVOC 0.001 = conversion factor – kg to metric tonnes

=0.6)

The operator shall include the term EVOCP-10 if the local air district authorizes the use of correlation equations for screening values between background and 9,999 ppmv. Operators shall include the term EVOCP-100 if the local air district authorizes the use of correlation equations for screening values between background and 99,999 ppmv.

Where available, operators shall use system specific determinations of gas composition and methane content (refinery fuel gas, natural gas,

associated gas, flexigas, low Btu gas) to determine a CFVOC

value.

When representative data is not available, operators shall use the default value (CFVOC = 0.6) provided by ARB.

  • (d)

    Calculation of Emissions from Flares and Other Control Devices.

    • (1)

      The operator shall calculate and report CO2, CH4 and N2O emissions resulting from the combustion of flare pilot and purge gas using the appropriate method(s) specified in sections 95113(a)(1) and (2).

  • (2)

    The operator shall calculate and report CO2 (and CH4 where applicable) emissions resulting from the combustion of hydrocarbons routed to flares for destruction using one of the methods specified below:

    • (A)

      Operators required to report CH4 and NMHC emissions to a local Air Quality Management District or Air Pollution Control District shall calculate CO2 emissions as follows:

365 CO2 = [CFNMHC 1

*NMHC*FE/(100-FE)*3.664+CH4*FE/(100-FE)*2.743] * 0.001

Where:

CF C NMHC O 2 = e m i s s i o n s o f C O 2 ( m e t r i c t o n n e s / y r ) = carbon fraction in NMHC (CFNMHC

= 0.6)

71

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