SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT
RULE 2011  CHAPTER 3  PROCESS UNITS  PERIODIC REPORTING AND RULE 219 EQUIPMENT
(Amended July 12, 1996)(Amended April 9, 1999)
TABLE OF CONTENTS
CHAPTER 3  PROCESS UNITS  PERIODIC REPORTING AND RULE 219 EQUIPMENT
A. General Requirements ............................................................................. 2011A31
B. Emission Calculations for Reported Data ................................................. 2011A32
C. Total Quarterly Emissions Calculation for all SO_{x}
Process Units at the Facility ......................................................................... 2011A37
D. Reporting Procedures ............................................................................. 2011A38
E. Fuel Meter Sharing .................................................................................. 2011A38
F. Rule 219 Equipment ................................................................................ 2011A38
G. Substitute Data Procedures ..................................................................... 2011A310
Process units may share fuel meters if each equipment has the same emission factor. This chapter also includes the equations describing the methods used to calculate SO_{x} process unit emissions and the reporting procedures. The interim reporting period does not apply to process units since existing fuel metering equipment or timers shall be used starting January 1, 1994 for Cycle 1 facilities and July 1, 1994 for Cycle 2 facilities.
A. GENERAL REQUIREMENTS
a. Type and quantity of fuel burned in units of million standard cubic feet per quarter (mmscf per quarter) for gaseous fuels or thousand gallons per quarter (mgal per quarter) for liquid fuels, expressed with three significant figures minimum; or
b. Total hours of operation.
B. EMISSION CALCULATIONS FOR REPORTED DATA
a. Pursuant to Rules 2011(d)(3) and 2011(f)(2), starting January 1, 1994 for Cycle 1 facilities, and starting July 1, 1994 for Cycle 2 facilities, the quarterly emission of each process unit shall be calculated and recorded according to:
r
Eip = d_{j }x EF_{sj}
j=1
(Eq.15)
where:
Eip = The quarterly mass emission of sulfur oxides for interim period (lb/quarter).
d_{j} = The quarterly fuel usage for each type of fuel recorded as mmscf/quarter or mgal/quarter.
EF_{sj} = The starting emission factor used to calculate unit emissions in the initial allocation, as specified in Table 2 of Rule 2002  Allocations for Oxides of Nitrogen (NO_{x}) and Oxides of Sulfur (SO_{x}) (lb/mmscf or lb/mgal, ).
r = The number of different types of fuel.
________________________________________________________________________
Example calculation: IC engine burning natural gas
Starting Emission factor = 0.60 lb/mmscf
Quarterly fuel usage = 2 mmscf/quarter
Eip = (0.60) x (2.0)
= 1.2 lb/quarter
_________________________________________________________________________
The Facility Permit holder of each equipment in a SO_{x} process unit when equipped with a totalizing fuel meter shall use emission factor listed in Table 2 of Rule 2002 or alternative emission factors established according to the methodology provided in Chapter 4 to obtain the quarterly mass emissions according to:
n
E_{EF} = d_{k} x EF_{k} (Eq.16)
k=1
where:
E_{EF} = The quarterly emissions of SO_{x} obtained using emission factor (lb/quarter.)
d_{k} = The quarterly fuel usage for each type of fuel (mmscf/quarter or mgal/quarter.)
EF_{k} = The emission factor as specified in Table 2 of Rule 2002  Allocations for Oxides of Nitrogen (NO_{x}) and Oxides of Sulfur (SO_{x}) (lb/mmscf, lb/mgal or lb/mbbl) or an alternative emission factor proposed by the Facility Permit holder as established from the source test requirement provided in Chapter 4
k = Each type of gaseous or liquid fuel consumed by each process unit throughout the quarter.
n = The total number of different types of fuel consumed by each process unit throughout the quarter
If the SO_{x} process unit is equipped with a timer , the Facility Permit holder shall estimate the quarterly fuel usage for each affected equipment according to Eq. 17  Eq. 20 and estimate the quarterly mass emissions according to Eq. 16  Eq. 20.
a. Quarterly Fuel Usage for Each Affected SO_{x} Process Unit
If the SO_{x} process unit does not measure a fuel usage with a fuel meter, the quarterly fuel usage for each affected equipment in a process unit shall be estimated according to:
d = d_{pu} x (H/H_{pu}) (Eq.17)
Where:
d = The estimated quarterly fuel usage of an affected SO_{x} process unit without a dedicated fuel meter (mmscf/quarter or mgal/quarter).
d_{pu }= The quarterly fuel usage of all SO_{x} process units at the facility (mmscf/quarter or mgal/quarter).
H = The quarterly heat input of an affected SO_{x} process unit without a dedicated fuel meter (mmBtu/quarter).
H_{pu }= The quarterly heat input of all SO_{x} process units at the facility (mmBtu/quarter).
__________________________________________________________________________
Example Calculation:
d_{pu} = 1,587 mmscf/quarter
H = 5,400 mmBtu/quarter
H_{pu} = 27,000 mmBtu/quarter
d = d_{pu} x (H/H_{pu})
d = 1,587 mmscf/quarter x (5,400 mmBtu/quarter – 27,000 mmBtu/quarter
d = 317.4 mmscf/quarter
_________________________________________________________________________
The quarterly fuel usage for all SO_{x} process units at the facility (dpu) shall be calculated according to the following equation:
d_{pu} = d_{fac}  d_{major }(Eq.18)
where:
d_{fac }= The quarterly fuel usage of all major sources and SO_{x} process units at the facility (mmscf/quarter or mgal/quarter).
d_{major }= The quarterly fuel usage of all major SO_{x} sources at the facility (mmscf/quarter or mgal/quarter).
Example Calculation:
d_{fac }= 58 mmscf/quarter
d_{major} = 42 mmscf/quarter
d_{pu }= Ffac  F_{major}
d_{pu }= 58  42
d_{pu }= 16 mmscf/quarter
The quarterly heat input of all SO_{x} process units at the facility (Hpu) shall be calculated according to:
n
H_{pu} = (R_{i} x T_{i}) (Eq.19)
i=1
where:
R_{i }= The maximum rated heat input capacity of a SO_{x} process unit (mmBtu/hr).
T_{i} = The quarterly accumulated operation hours for a SO_{x} process unit (hr/quarter).
i = Each process unit
n = The total number of SO_{x} process units at the facility.
_________________________________________________________________________
Example Calculation:
R_{1} = 3.5 mmBtu/hr
R_{2 }= 2.7 mmBtu/hr
T_{1} = 480 hr/quarter
T_{2} = 120 hr/quarter
2
H_{pu} = (R_{i}
x T_{i})
i = 1
H_{pu} = (3.5 x 480) + (2.7 x 120)
H_{pu }= 2004 mmBtu/quarter
The maximum rated heat input capacity of all SO_{x} process units shall be in units of mmBtu/hr. Since internal combustion engines are usually rated in units of brake horse power, the maximum rated heat input capacity of an engine shall be computed as follows.
R = 0.002545 x bhp / eff (Eq.20)
where:
R = The maximum rated heat input capacity
eff = The manufacturer's rated efficiency @LHV x (LHV/HHV)
= 0.25, if not provided by the operator
bhp = The manufacturer's rated shaft output in brake horse power
_________________________________________________________________________
Example Calculation:
eff = 0.25
bhp = 75 bhp
R = 0.002545 x bhp / eff
R = 0.002545 x 75/.25
R = 0.7635 mmBtu/hr
_________________________________________________________________________
If gas turbines are rated in kilowatts, the rating shall be converted to mmBtu/hr by applying the manufacturer's heat rate (in mmBtu/kwhr). If the manufacturer's heat rate is not available, a default value of 15,000 Btu/kwhr shall be used.
__________________________________________________________________________
Example Calculation:
Quarterly fuel usage for an ICE with maximum rated bhp of 90 bhp, 0.25 eff and a boiler rated at 4 mmBtu/hr being
served by one fuel totalizer reading 10.5 mmscf. The boiler and ICE burn landfill gas.
I.C.E.= 90 bhp Boiler= 4 mmBtu/hr C_{g} = 80 ppmv for landfill gas
Fuel meter reading = F_{pu} = 10.5 mmscf
I.C.E.
R = 0.002545 x 90/.25 = 0.916 mmBtu/hr
t = 3 hr/day x 7 days/wk. x 4 wk./mo. x 3 mo/qtr = 252 hr/qtr
H_{ice} = R x t = 0.916 x 252 = 230.8 mmBtu/qtr
Boiler
H_{boiler} = 4 mmBtu/hr x 24 hr./day x 7 day/wk. x 4 wk./mo. x 3 mo/qtr
H_{boiler} = 8064 mmBtu/qtr.
H_{pu} = 230.8 + 8064 = 8294.8 mmBtu/qtr.
d_{ice} = d_{pu }x (H_{ice}/H_{pu})
= 10.5 mmscf/qtr. x (230.8/8294.8)
= .292 mmscf/qtr.
d_{boiler }= d_{pu} x (H_{boiler}/H_{pu})
= 10.5 mmscf/qtr. x (8064/8294.8)
= 10.2 mmscf/qtr.
E_{ice} = d_{ice} x C_{g} x 0.166
E_{ice} = .292 mmscf/qtr x 80 ppmv x 0.166
E_{ice} = 3.88 lb/qtr.
E_{boiler }= d_{boiler} x C_{g} x 0.166
E_{boiler} = 10.2 mmscf/qtr x 80 ppmv x 0.166
E_{boiler }= 135 lb/qtr.
E = E_{ice} + E_{boiler} = 3.88 + 135 = 138.88 lb/qtr.
__________________________________________________________________________
C. TOTAL QUARTERLY EMISSIONS CALCULATION FOR ALL SO_{x}PROCESS UNITS AT THE FACILITY
Quarterly SO_{x} emissions of all SO_{x} process units at the facility shall be estimated according to:
m
E = E_{EF} (Eq.21)
i=1
where:
E = The quarterly total emissions of SO_{x} for all SO_{x} process units (lb/quarter).
E_{EF} = The quarterly emissions of SO_{x} obtained using emission factor (lb/quarter).
i = Each process unit
m = The number of process units at the facility.
E. FUEL METER SHARING
F. RULE 219 EQUIPMENT
a. The Facility Permit holder shall determine the emissions for one or more equipment exempt under Rule 219 and report the emissions on a quarterly basis as part of the Quarterly Certified Emissions report required by Rule 2004. The Facility Permit holder shall be allowed to use the existing fuel totalizer, the monthly fuel billing statement, or any other equivalent methodology to estimate their fuel usage for a quarterly period.
b. Quarterly reporting period shall start on January 1, 1994 for Cycle 1 facilities and July 1, 1994 for Cycle 2 facilities.
c. The Facility Permit holder of each equipment shall maintain the quarterly fuel usage data for all equipment exempt under Rule 219 for three years. Such data shall be made available to District staff upon request.
d. The fuel usage for equipment exempt under Rule 219 may be used in conjunction with process units provided that they have the same emission factor.
The Facility Permit holder shall determine SO_{x} emissions for equipment exempt under Rule 219 as follows:
n
EEF = d_{k} x EF_{k} (Eq.22)
k=1
where:
E_{EF} = The quarterly emissions of SO_{x} obtained using emission factor (lb /quarter).
d_{k} = The quarterly fuel usage for each type of fuel (mmscf/quarter or mgal/quarter).
EF_{k} = The emission factor as specified in Table 2 of Rule 2002  Allocations for Oxides of Nitrogen (NO_{x}) and Oxides of Sulfur (SO_{x}) (lb/mmscf, or lb/mgal or lb/mbbl or an alternative emission factor proposed by the Facility Permit holder as established from the source test requirement provided in chapter 4.
k = Each type of gaseous or liquid fuel consumed by each process unit throughout the quarter.
n = The total number of different types of fuel consumed by each process unit throughout the quarter.
G. SUBSTITUTE DATA PROCEDURES
a. For a missing data period less than or equal to one quarter, substitute data shall be calculated using the process unit(s) average quarterly fuel usage for the previous four quarters. If four quarters of data are not available, substitute data shall be calculated as if the facility has no records.
b. For a missing data period greater than one quarter, substitute data shall be calculated using the process unit(s) highest quarterly fuel usage data for the previous four quarters. If four quarters of data are not available, substitute data shall be calculated as if the facility has no records.
c. If the facility has no records, substitute data shall be calculated using 100% uptime during the substitution period and the process unit(s) maximum rated capacity and uncontrolled emission factor for each quarter of missing data.
TABLE 3A
MEASURED VARIABLES FOR ALL SO_{x} PROCESS UNITS
EQUIPMENT 
MEASURED VARIABLES 
Any SO_{x} unit that is not 
1. Fuel usage; or 
TABLE 3B
REPORTED VARIABLES FOR ALL SO_{x}PROCESS UNITS
EQUIPMENT 
REPORTED VARIABLES 
Any SO_{x} unit that is not 
