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Electronic Code of Federal Regulations

e-CFR data is current as of December 6, 2019

Title 40Chapter ISubchapter CPart 63Subpart UUU → Appendix


Title 40: Protection of Environment
PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED)
Subpart UUU—National Emission Standards for Hazardous Air Pollutants for Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur Recovery Units


Table 32 to Subpart UUU of Part 63—Requirements for Performance Tests for HAP Emissions From Sulfur Recovery Units Not Subject to the New Source Performance Standards for Sulfur Oxides

As stated in §63.1568(b)(2) and (3), you shall meet each requirement in the following table that applies to you.

For .  .  .You must .  .  .Using .  .  .According to these
requirements .  .  .
1. Option 1: Elect NSPS. Each new and existing sulfur recovery unita. Measure SO2 concentration (for an oxidation or reduction system followed by incineration) or measure the concentration of reduced sulfur (or SO2 if you use an instrument to convert the reduced sulfur to SO2) for a reduction control system without incinerationData from continuous emission monitoring systemCollect SO2 monitoring data every 15 minutes for 24 consecutive operating hours. Reduce the data to 1-hour averages computed from four or more data points equally spaced over each 1-hour period.
   b. Measure O2 concentration for the inlet air/oxygen supplied to the system, if using Equation 1 of 40 CFR 60.102a(f)1)(i) to set your emission limit. You may use either an O2 CEMS method in item 1.b.i of this table or the flow monitor in item 1.b.ii of this tablei. Data from continuous emission monitoring system; orCollect O2 monitoring data every 15 minutes for 24 consecutive operating hours. Reduce the data to 1-hour averages computed from four or more data points equally spaced over each 1-hour period; and average over the 24-hour period for input to Equation 1 of 40 CFR 60.102a(f)(1)(i).
   ii. Data from flow monitor for ambient air and purchased oxygen-enriched gasCollect gas flow rate monitoring data every 15 minutes for 24 consecutive operating hours. Reduce the data to 1-hour averages computed from 4 or more data points equally spaced over each 1-hour period; calculate the hourly O2 percent using Equation 10 of 40 CFR 60.106a(a)(6)(iv); and average over the 24-hour period for input to Equation 1 of 40 CFR 60.102a(f)(1)(i).
2. Option 2: TRS limit, using CEMS. Each new and existing sulfur recovery unitMeasure the concentration of reduced sulfur (or SO2 if you use an instrument to convert the reduced sulfur to SO2)Data from continuous emission monitoring systemCollect TRS data every 15 minutes for 24 consecutive operating hours. Reduce the data to 1-hour averages computed from four or more data points equally spaced over each 1-hour period.
3. Option 2: TRS limit, if using continuous parameter monitoring systems. Each new and existing sulfur recovery unita. Select sampling port's location and the number of traverse portsMethod 1 or 1A in Appendix A-1 to part 60 of this chapterSampling sites must be located at the outlet of the control device and prior to any releases to the atmosphere.
   b. Determine velocity and volumetric flow rateMethod 2, 2A, 2C, 2D, or 2F in appendix A-1 to part 60 of this chapter, or Method 2G in appendix A-2 to part 60 of this chapter, as applicable
   c. Conduct gas molecular weight analysis; obtain the oxygen concentration needed to correct the emission rate for excess airMethod 3, 3A, or 3B in appendix A-2 to part 60 of this chapter, as applicableTake the samples simultaneously with reduced sulfur or moisture samples.
   d. Measure moisture content of the stack gasMethod 4 in appendix A-3 to part 60 of this chapterMake your sampling time for each Method 4 sample equal to that for 4 Method 15 samples.
   e. Measure the concentration of TRSMethod 15 or 15A in appendix A-5 to part 60 of this chapter, as applicableIf the cross-sectional area of the duct is less than 5 square meters (m2) or 54 square feet, you must use the centroid of the cross section as the sampling point. If the cross-sectional area is 5 m2 or more and the centroid is more than 1 meter (m) from the wall, your sampling point may be at a point no closer to the walls than 1 m or 39 inches. Your sampling rate must be at least 3 liters per minute or 0.10 cubic feet per minute to ensure minimum residence time for the sample inside the sample lines.
   f. Calculate the SO2 equivalent for each run after correcting for moisture and oxygenThe arithmetic average of the SO2 equivalent for each sample during the run
   g. Correct the reduced sulfur samples to zero percent excess airEquation 1 of §63.1568
   h. Establish each operating limit in Table 30 of this subpart that applies to youData from the continuous parameter monitoring system
   i. Measure thermal incinerator: combustion zone temperatureData from the continuous parameter monitoring systemCollect temperature monitoring data every 15 minutes during the entire period of the performance test; and determine and record the minimum hourly average temperature from all the readings.
   j. Measure thermal incinerator: oxygen concentration (percent, dry basis) in the vent streamData from the continuous parameter monitoring systemCollect oxygen concentration (percent, dry basis) data every 15 minutes during the entire period of the performance test; and determine and record the minimum hourly average percent excess oxygen concentration.

[80 FR 75312, Dec. 1, 2015]

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