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).
Summary
SCH Number
2026010126
Public Agency
Bay Area Air Quality Management District
(BAAQMD)
Document Title
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).
Document Type
NOE - Notice of Exemption
Received
Posted
1/7/2026
Document Description
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.
Contact Information
Name
Samuel Dennis
Agency Name
Bay Area Air District (Air District)
Job Title
Senior Air Quality Engineer
Contact Types
Lead/Public Agency
Phone
Email
Name
Kayla Thomas
Agency Name
Martinez Refining Company, LLC (MRC)
Job Title
Environmental Manager
Contact Types
Project Applicant
Phone
Location
Cities
Martinez
Counties
Contra Costa
Regions
Citywide
Cross Streets
Wygal Drive
Zip
94553
Other Information
Project Location: 3485 Pacheco Boulevard, Martinez, CA 94553, Contra Costa County. Nearest Cross Street: Wygal Drive.
Notice of Exemption
Exempt Status
Ministerial
Type, Section or Code
Sec. 21080(b)(1); 15268(a)
Reasons for Exemption
Is a ministerial action conducted using the fixed standards and objective measures in the Air District's rules and regulations. Also, the permit application did not trigger Best Available Control Technology {BACT) or Best Available Control Technology for Toxics (TBACT).
Exempt Status
Categorical Exemption
Type, Section or Code
CEQA Guidelines§ 15301
Reasons for Exemption
The Air District's permit action is exempt because it permits a minor alteration of an existing facility and does not authorize any expansion of the existing S-1426 or S-1427 use, nor the other devices associated with them (S-1510, S-1507, S-1509, and S-1512). There will be no increase in the quantity of feed processed at the CCU. Because there will be no expansion in use at the related project equipment, the project is exempt.
Exempt Status
Categorical Exemption
Type, Section or Code
CEQA Guidelines§ 15302
Reasons for Exemption
The Air District's permit action is also exempt because it involves the replacement of existing internal parts, such as the replacement of the air grid and cyclones as S-1426, for the same purpose and without an increase in capacity. Accordingly, these replacements are exempt.
Further, based on the review of the permit application materials, including Appendix H (environmental information form), the project will not result in any additional or different environmental impacts beyond what is already entailed in the applicant's existing use of the source. In making the determination that this application is categorically exempt:
1) the Air District reviewed the permit application materials which indicate that there is no potential for a significant adverse environmental impact from the project;
2) a formal health risk assessment was approved by the Air District; and 3) the Air District determined that the project will not have a significant effect on the environment due to unusual circumstances, or due to cumulative impacts from successive projects of the same type in the same place.
County Clerk
Contra Costa
Attachments
Notice of Exemption
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