Issuance of an Authority to Construct and Permit to Operate to alter Sources: S-1426, S-1427,S-1507, S-1509, S-1512, SS-1510 (Air District Application 698127).

This permit action was to issue an Authority to Construct and Permit to Operate for the alteration of the following equipment to improve the overall reliability and reduce emissions due to maintenance and operational improvements: S-1426 CP Catalytic Cracking Unit (CCU) 79,500 barrels of gross feed per day; 25,421,700 barrels of gross feed per year Gross feed is the sum total of gas oil feed+ rerun feed+ slurry recycle CCU Regenerator carbon monoxide (CO) emissions abated by carbon monoxide boilers (COBs) S-1507, 1509, 1512 S-1427 CP Catalytic Gas Plant (CGP) Located downstream of CCU and constrained by capacity of downstream relief valve S-1507 UTIL Carbon Monoxide Boiler 1 Maximum Operating Rate listed in Title V permit: 6,125 MM Btu/day (HHV); 2,235,625 MMBtu/year (HHV) Located downstream of CCU and abates CCU Regenerator CO emissions Abated by: A-12 Electrostatic Precipitator #1 Research Cottrell, GO-3101, 317,000 ACFM Located downstream of CCU and COB 1 and venting to atmosphere from emission point P-26 S-1509 UTIL Carbon Monoxide Boiler 2 Maximum Operating Rate listed in Title V permit: 6,125 MM Btu/day (HHV); 2,235,625 MM Btu/year (HHV) Located downstream of CCU and abates CCU Regenerator CO emissions Abated by: A-13 Electrostatic Precipitator #2 Research Cottrell, GO-3101, 317,000 ACFM Located downstream of CCU and COB 2 and venting to atmosphere from emission point P-27 S-1510 CP F-66 CCU Preheater Maximum Operating Rate: 4,-286 MM Btu/day (HHV); 1,077,600 MM Btu/year (HHV) Located upstream of and preheats feed for CCU S-1512 UTIL Carbon Monoxide {CO) Boiler 3 Maximum Operating Rate listed in Title V permit: 6,125 MM Btu/day (HHV); 2,235,625 MM Btu/year (HHV) Located downstream of CCU and abates CCU Regenerator CO emissions. Abated by: A-14 Electrostatic Precipitator #3 Research Cottrell, GO-3101, 317,000 ACFM Located downstream of CCU and COB 3 and venting to atmosphere from emission point P-28 MRC has proposed the following maintenance and operational improvements to the CCU (S-1426), CGP (S-1427), and COBs (S-1507, S-1509, and S-1512): 1. CCU Regenerator Upgrades: Replacement of the regenerator column's air grid and cyclones, as well as the addition of a steam quench system. 2. CGP Wet Gas Compressor Upgrades: Replacement of couplings, diaphragms, and rotor for compressor J-125, along with a replacement of the TB-152 steam turbine which drives the compressor, and new fugitive components in non-urea service. 3. Improvements to the COB Urea Injection system : Installation of a new pump for the system, moving the point of urea injection, and new fugitive components in urea service. Emissions from S-1426 are routed to the COBs S-1507, S-1509, and S-1512, which are abated by the electrostatic precipitators A-12, A-13, and A-14, respectively.