NR 440.26(7)(h)2.
2. Calculate a 7-day average (arithmetic mean) concentration of sulfur dioxide for the inlet and for the outlet to the add-on control device using all of the 1-hour average concentration values obtained during 7 successive 24-hour periods.
where:
-
See PDF for diagram 
is the sulfur dioxide emission concentration determined in
subd. 2. at the inlet to the add-on control device, ppmv
-
See PDF for diagram is the sulfur dioxide emission concentration determined in
subd. 2. at the outlet to the add-on control device, ppmv
100 is the conversion factor, decimal to percent
NR 440.26(7)(h)4.
4. Outlet concentrations of sulfur dioxide from the add-on control device for compliance with the 50 ppmv standard, reported on a dry, O
2-free basis, shall be calculated using the procedures outlined in
subds. 1. and
2., but for the outlet monitor only.
NR 440.26(7)(h)5.
5. If supplemental sampling data are used for determining the 7-day averages under this paragraph and the data are not hourly averages, then the value obtained for each supplemental sample shall be assumed to represent the hourly average for each hour over which the sample was obtained.
NR 440.26(7)(h)6.
6. For the purpose of adjusting pollutant concentrations to zero percent oxygen, the following equation shall be used:
Cadj = Cmeas[20.9c/(20.9 - %O2)]
where:
Cadj is the pollutant concentration adjusted to zero percent oxygen, ppm or g/dscm
Cmeas is the pollutant concentration measured on a dry basis, ppm or g/dscm
20.9c is the 20.9% oxygen-0.0% oxygen (defined oxygen correction basis), percent
20.9 is the oxygen concentration in air, percent
%O2 is the oxygen concentration measured on a dry basis, percent
NR 440.26(7)(i)
(i) For the purpose of determining compliance with
sub. (5) (b) 2., the following reference methods from
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17, and calculation procedures shall be used except as provided in
subd. 12.:
NR 440.26(7)(i)2.
2. For gases released to the atmosphere from the fluid catalytic cracking unit catalyst regenerator:
NR 440.26(7)(i)2.a.
a. Method 8 as modified in
subd. 3. for moisture content and for the concentration of sulfur oxides calculated as sulfur dioxide.
NR 440.26(7)(i)2.c.
c. Method 2 calculation procedures, data obtained from Methods 3 and 8, for velocity and volumetric flow rate.
NR 440.26(7)(i)3.
3. Method 8 shall be modified by the insertion of a heated glass fiber filter between the probe and first impinger. The probe liner and glass fiber filter temperature shall be maintained above 160
°C (320
°F). The isopropanol impinger shall be eliminated. Sample recovery procedures described in Method 8 for container No. 1 shall be eliminated. The heated glass fiber filter also shall be excluded; however, rinsing of all connecting glassware after the heated glass fiber filter shall be retained and included in container No. 2. Sampled volume shall be at least 1 dscm.
NR 440.26(7)(i)6.
6. All testing shall be performed at the same location. Where the gases discharged by the fluid catalytic cracking unit catalyst regenerator pass through an incinerator-waste heat boiler in which auxiliary or supplemental gaseous, liquid or solid fossil fuel is burned, testing shall be conducted at a point between the regenerator outlet and the incinerator-waste heat boiler. An alternative sampling location after the waste heat boiler may be used if alternative coke burn-off rate equations, and, if requested, auxiliary/supplemental fuel SO
x credits, have been submitted to and approved by the department prior to sampling.
NR 440.26(7)(i)7.
7. Coke burn-off rate shall be determined using the procedures specified under
par. (b) 3., unless
subd. 6. applies.
NR 440.26(7)(i)8.
8. Calculate the concentration of sulfur oxides as sulfur dioxide using equation 8-3 in
Section 6.5 of Method 8 to calculate and report the total concentration of sulfur oxides as sulfur dioxide -
See PDF for diagram .
NR 440.26(7)(i)9.
9. Sulfur oxides emission rate calculated as sulfur dioxide shall be determined for each test run by the following equation:
where:
-
See PDF for diagram is the sulfur oxides emission rate calculated as sulfur dioxide, kg/hr (lb/hr)
-
See PDF for diagram is the sulfur oxides emission concentration calculated as sulfur dioxide, g/dscm (gr/dscf)
Qsd is the dry volumetric stack gas flow rate corrected to standard conditions, dscm/hr (dscf/hr)
K is a conversion factor, 1,000 g/kg (7,000 gr/lb)
where:
-
See PDF for diagram is the sulfur oxides emissions calculated as kg sulfur dioxide per Mg (lb/ton) coke burn-off
-
See PDF for diagram is the sulfur oxides emission rate calculated as sulfur dioxide, kg/hr (lb/hr)
Rc is the coke burn-off rate, Mg/hr (ton/hr)
NR 440.26(7)(i)11.
11. Calculate the 7-day average sulfur oxides emission rate as sulfur dioxide per Mg (ton) of coke burn-off by dividing the sum of the individual daily rates by the number of daily rates summed.
NR 440.26(7)(i)12.
12. An owner or operator may, upon approval by the administrator, use an alternative method for determining compliance with
sub. (5) (b) 2., as provided in
s. NR 440.08 (2). Any requests for approval shall include data to demonstrate to the administrator that the alternative method would produce results adequate for the determination of compliance.
NR 440.26(7)(j)
(j) For the purpose of determining compliance with
sub. (5) (b) 3., the following analytical methods and calculation procedures shall be used:
NR 440.26(7)(j)1.
1. One fresh feed sample shall be collected once per 8-hour period.
NR 440.26(7)(j)2.
2. Fresh feed samples shall be analyzed separately by using any one of the following applicable analytical test methods: ASTM D129-00, ASTM D1552-01, ASTM D2622-98 or ASTM D1266-98. These methods are incorporated by reference in
s. NR 440.17 (2) (a) 8., 20., 34. and 18., respectively. The applicable range of some of these ASTM methods is not adequate to measure the levels of sulfur in some fresh feed samples. Dilution of samples prior to analysis with verification of the dilution ratio is acceptable upon prior approval of the department.
NR 440.26(7)(j)3.
3. If a fresh feed sample cannot be collected at a single location, then the fresh feed sulfur content shall be determined as follows:
NR 440.26(7)(j)3.a.
a. Individual samples shall be collected once per 8-hour period for each separate fresh feed stream charged directly into the riser or reactor of the fluid catalytic cracking unit. For each sample location the fresh feed volumetric flow rate at the time of collecting the fresh feed sample shall be measured and recorded. The same method for measuring volumetric flow rate shall be used at all locations.
NR 440.26(7)(j)3.b.
b. Each fresh feed sample shall be analyzed separately using the methods specified under
subd. 2.
where:
Sf is the fresh feed sulfur content expressed in percent by weight of fresh feed
n is the number of separate fresh feed streams charged directly to the riser or reactor of the fluid catalytic cracking unit
Qf is the total volumetric flow rate of fresh feed charged to the fluid catalytic cracking unit
Si is the fresh feed sulfur content expressed in percent by weight of fresh feed for the “ith" sampling location
Qi is the volumetric flow rate of fresh feed stream for the “ith" sampling location
NR 440.26(7)(j)4.
4. Calculate a 7-day average (arithmetic mean) sulfur content of the fresh feed using all of the fresh feed sulfur content values obtained during 7 successive 24-hour periods.
NR 440.26(8)(a)(a) Each owner or operator subject to
sub. (5) (b) shall notify the department of the specific provisions of
sub. (5) (b) with which the owner or operator elects to comply. Notification shall be submitted with the notification of initial startup required by
s. NR 440.07 (1) (c). If an owner or operator elects at a later date to comply with an alternative provision of
sub. (5) (b), then the department shall be notified by the owner or operator in the report described in
par. (c).
NR 440.26(8)(b)
(b) Each owner or operator subject to
sub. (5) (b) shall record and maintain the following information:
NR 440.26(8)(b)1.a.
a. All data and calibrations from continuous monitoring systems located at the inlet and outlet to the control device, including the results of the daily drift tests and quarterly accuracy assessments required under Appendix F, Procedure 1 of
40 CFR part 60, incorporated by reference in
s. NR 440.17;
NR 440.26(8)(b)2.
2. If complying with
sub. (5) (b) 2., measurements obtained in the daily Method 8 testing, or those obtained by alternative measurement methods, if
sub. (7) (i) 12. applies.
NR 440.26(8)(c)
(c) Each owner or operator subject to
sub. (5) (b) shall submit a report except as provided by
par. (d). The following information shall be contained in the report:
NR 440.26(8)(c)1.a.
a. The average percent reduction and average concentration of sulfur dioxide on a dry, O
2-free basis in the gases discharged to the atmosphere from any fluid cracking unit catalyst regenerator for which the owner or operator seeks to comply with
sub. (5) (b) 1. is below 90% and above 50 ppmv, as measured by the continuous monitoring system prescribed under
sub. (6) (a) 8., or above 50 ppmv, as measured by the outlet continuous monitoring system prescribed under
sub. (6) (a) 9. The average percent reduction and average sulfur dioxide concentration shall be determined using the procedures specified under
sub. (7) (h);
NR 440.26(8)(c)1.b.
b. The average emission rate of sulfur dioxide in the gases discharged to the atmosphere from any fluid catalytic cracking unit catalyst regenerator for which the owner or operator seeks to comply with
sub. (5) (b) 2. exceeds 9.8 kg SO
x per 1,000 kg coke burn-off, as measured by the daily testing prescribed under
sub. (7) (i). The average emission rate shall be determined using the procedures specified under
sub. (7) (i); and
NR 440.26(8)(c)1.c.
c. The average sulfur content of the fresh feed for which the owner or operator seeks to comply with
sub. (5) (b) 3. exceeds 0.30% by weight. The fresh feed sulfur content, a 7-day rolling average, shall be determined using the procedures specified under
sub. (7) (j).
NR 440.26(8)(c)2.
2. Any 30-day period in which the minimum data requirements specified in
sub. (5) (d) are not obtained.
NR 440.26(8)(c)3.c.
c. Whether the exceedance was concurrent with a startup, shutdown or malfunction of the fluid catalytic cracking unit or control system; and
NR 440.26(8)(c)4.a.
a. The dates for which and brief explanations as to why fewer than 18 valid hours of data were obtained for the inlet continuous monitoring system;
NR 440.26(8)(c)4.b.
b. The dates for which and brief explanations as to why fewer than 18 valid hours of data were obtained for the outlet continuous monitoring system;
NR 440.26(8)(c)4.c.
c. Identification of times when hourly averages have been obtained based on manual sampling methods;
NR 440.26(8)(c)4.d.
d. Identification of the times when the pollutant concentration exceeded the full span of the continuous monitoring system;
NR 440.26(8)(c)4.e.
e. Description of any modifications to the continuous monitoring system that could affect the ability of the continuous monitoring system to comply with Performance Specification 2 or 3 of
40 CFR part 60, Appendix B, incorporated by reference in
s. NR 440.17; and
NR 440.26(8)(c)5.
5. If subject to
sub. (5) (b) 2., for each day in which a Method 8 sample result required by
sub. (7) (i) was not obtained, the date for which and brief explanation as to why a Method 8 sample result was not obtained, for approval by the department.
NR 440.26(8)(c)6.
6. If subject to
sub. (5) (b) 3., for each 8-hour period in which a feed sulfur measurement required by
sub. (7) (j) was not obtained, the date for which and brief explanation as to why a feed sulfur measurement was not obtained, for approval by the department.
NR 440.26(8)(d)
(d) For any periods for which sulfur dioxide or oxides emissions data are not available, the owner or operator of the affected facility shall submit a signed statement indicating if any changes were made in operation of the emission control system during the period of data unavailability which could affect the ability of the system to meet the applicable emission limit. Operations of the control system and affected facility during periods of data unavailability shall be compared with operation of the control system and affected facility before and following the period of data unavailability.
