As stated in § 63.1568(a)(1) , you shall meet each emission limitation in the following table that applies to you.
For . . . | You shall meet this emission limit for each process vent . . . |
1. Subject to NSPS. Each new or existing Claus sulfur recovery unit part of a sulfur recovery plant with design capacity greater than 20 long tons per day (LTD) and subject to the NSPS for sulfur oxides in 40 CFR 60.104(a)(2) or 60.102a(f)(1) | a. 250 ppmv (dry basis) of sulfur dioxide (SO2) at zero percent excess air, or concentration determined using Equation 1 of 40 CFR 60.102a(f)(1)(i) , if you use an oxidation control system or if you use a reduction control system followed by incineration. |
b. 300 ppmv of reduced sulfur compounds calculated as ppmv SO2 (dry basis) at zero percent excess air, or concentration determined using Equation 1 of 40 CFR 60.102a(f)(1)(i) , if you use a reduction control system without incineration. | |
2. Option 1: Elect NSPS. Each new or existing sulfur recovery unit (Claus or other type, regardless of size) not subject to the NSPS for sulfur oxides in 40 CFR 60.104(a)(2) or 60.102a(f)(1) | a. 250 ppmv (dry basis) of SO2 at zero percent excess air, or concentration determined using Equation 1 of 40 CFR 60.102a(f)(1)(i) , if you use an oxidation control system or if you use a reduction control system followed by incineration. |
b. 300 ppmv of reduced sulfur compounds calculated as ppmv SO2 (dry basis) at zero percent excess air, or concentration determined using Equation 1 of 40 CFR 60.102a(f)(1)(i) , if you use a reduction control system without incineration. | |
3. Option 2: TRS limit. Each new or existing sulfur recovery unit (Claus or other type, regardless of size) not subject to the NSPS for sulfur oxides in 40 CFR 60.104(a)(2) or 60.102a(f)(1) | 300 ppmv of total reduced sulfur (TRS) compounds, expressed as an equivalent SO2 concentration (dry basis) at zero percent oxygen. |
40 C.F.R. 63 app Table 29 to Subpart UUU of Part 63