DAQ-2024-011520

1
DAQC-1108-24
Site ID 10119 (B5)

MEMORANDUM

TO: FILE – CHEVRON PRODUCTS COMPANY – Salt Lake Refinery

THROUGH: Harold Burge, Major Source Compliance Section Manager

FROM: Rob Leishman, Environmental Scientist

DATE: October 30, 2024

SUBJECT: Chevron Products Company (Chevron), Major, NSPS, Title V, MACT, Davis County –
FRS # UT00000049001100003

INSPECTION TYPE: State Electronic Data Report (SEDR) Review

REVIEW DATE: October 30, 2024

SOURCE LOCATION: North Salt Lake/Davis County

SOURCE CONTACT: Tony Pollock – 801-539-7162

APPLICABLE
REGULATIONS: Approval Order (AO) dated August 24, 2022,
DAQE-AN101190106-22

SOURCE REVIEW
EVALUATION: With the exception of sources that only monitor for opacity, quarterly
report memoranda will only address the findings of the quarterly
report. Approval Order and Title V permit conditions addressing
continuous emission monitoring requirements will be addressed in
Chevron’s relative accuracy performance specification test review
memorandum.

SEDR REVIEW:

Third Quarter 2024
% Monitor Availability (MA) Performance Test Dates
(N/A to Opacity)
Summary of Excess Emissions During Point
Source Operation
Point
Source
Op.
hrs. Channel MA CGA Lin RATA Point
Source Channel Hrs. Limitation
Boiler #7 1695 NOx 98% 08/28/24 08/27/24
FCC
Regenerator
Vent
Opacity 0.00 30 % -
6min
Boiler #7 1695 O2 98% 08/28/24 08/27/24
FCC
Regenerator
Vent
Opacity 0.00 20 % -
3hrRA

1 8 2

2
Third Quarter 2024
% Monitor Availability (MA) Performance Test Dates
(N/A to Opacity)
Summary of Excess Emissions During Point
Source Operation
Point
Source
Op.
hrs. Channel MA CGA Lin RATA Point
Source Channel Hrs. Limitation
FCC
Regenerator
Vent
2208 Opacity 100%
FCC
Regenerator
Vent
SO2 0.00 50 ppm -
7dRA
FCC
Regenerator
Vent
2208 CO 98% 08/08/24 08/26/24
FCC
Regenerator
Vent
SO2 0.00 25 ppm -
365dRA
FCC
Regenerator
Vent
2208 NOx 98% 08/08/24 08/26/24
FCC
Regenerator
Vent
NOx 0.00 106 ppm -
7dRA
FCC
Regenerator
Vent
2208 SO2 98% 08/08/24 08/26/24
FCC
Regenerator
Vent
NOx 0.00 80 ppm -
7dRA
FCC
Regenerator
Vent
2208 CO2 98% 08/08/24 08/26/24
FCC
Regenerator
Vent
CO 0.00 500 ppm -
hour
FCC
Regenerator
Vent
2208 O2 98% 08/08/24 08/26/24 Flare #1 H2S 3.00 162 ppm -
3hrRA
Flare #1 2208 H2S 97% 08/12/24 09/21/20 Flare #2 H2S 55.00 162 ppm -
3hrRA
Flare #1 2208 TRS 100% 08/12/24 Flare #3 H2S 0.00 162 ppm -
3hrRA
Flare #2 2208 H2S 97% 08/07/24 09/22/20 Fuel Gas
Mix Point H2S 0.00 162 ppm -
3hrRA
Flare #2 2208 TRS 98% 08/07/24 Fuel Gas
Mix Point H2S 0.00 60 ppm -
365dRA
Flare #3 2208 H2S 98% 08/13/24 08/20/24 SRU Tailgas
Incinerator 1 SO2 10.00 250 ppm -
12hrRA
Flare #3 2208 TRS 98% 08/13/24 SRU Tailgas
Incinerator 2 SO2 0.00 250 ppm -
12hrRA
Fuel Gas
Mix Point 2208 H2S 95% 08/06/24 08/19/24
SRU Tailgas
Incinerator 1 2208 SO2 100% 08/06/24 08/21/24
SRU Tailgas
Incinerator 1 2208 O2 100% 08/08/24 08/21/24
SRU Tailgas
Incinerator 2 2208 SO2 99% 08/07/24 08/22/24
SRU Tailgas
Incinerator 2 2208 O2 99% 08/07/24 08/22/24

Excess Emission Report - Hourly Summary
Point
Source Channel
Startup
&
Shutdown
Control
Equipment
Problems
Process
Problems
Other
Known
Causes
Unknown
Causes
Emission
Limit
FCC Regenerator Vent Opacity 0 0 0 0 0 30 % - 6min
FCC Regenerator Vent Opacity 0 0 0 0 0 20 % - 3hrRA
FCC Regenerator Vent SO2 0 0 0 0 0 50 ppm - 7dRA

3
Excess Emission Report - Hourly Summary
Point
Source Channel
Startup
&
Shutdown
Control
Equipment
Problems
Process
Problems
Other
Known
Causes
Unknown
Causes
Emission
Limit
FCC Regenerator Vent SO2 0 0 0 0 0 25 ppm - 365dRA
FCC Regenerator Vent NOx 0 0 0 0 0 106 ppm - 7dRA
FCC Regenerator Vent NOx 0 0 0 0 0 80 ppm - 7dRA
FCC Regenerator Vent CO 0 0 0 0 0 500 ppm - hour
Flare #1 H2S 0 3 0 0 0 162 ppm - 3hrRA
Flare #2 H2S 0 22 2 31 0 162 ppm - 3hrRA
Flare #3 H2S 0 0 0 0 0 162 ppm - 3hrRA
Fuel Gas Mix Point H2S 0 0 0 0 0 162 ppm - 3hrRA
Fuel Gas Mix Point H2S 0 0 0 0 0 60 ppm - 365dRA
SRU Tailgas
Incinerator 1 SO2 0 10 0 0 0 250 ppm - 12hrRA
SRU Tailgas
Incinerator 2 SO2 0 0 0 0 0 250 ppm - 12hrRA

CMS Performance Summary - Hourly Summary
Point
Source Channel Monitor
Malfunction
Non-monitor
Malfunction
QA
Calibrations
Other
Known
Causes
Unknown
Causes
Boiler #7 NOx 34 0 1 1 0
Boiler #7 O2 34 0 1 1 0
FCC Regenerator Vent Opacity 0 0 0 2 0
FCC Regenerator Vent CO 1 0 47 5 0
FCC Regenerator Vent NOx 1 0 47 5 0
FCC Regenerator Vent SO2 1 0 47 5 0
FCC Regenerator Vent CO2 1 0 47 5 0
FCC Regenerator Vent O2 1 0 47 5 0
Flare #1 H2S 40 0 24 3 0
Flare #1 TRS 0 1 0 3 0
Flare #2 H2S 0 0 29 27 0
Flare #2 TRS 36 0 0 2 0
Flare #3 H2S 0 17 22 4 0
Flare #3 TRS 33 17 0 3 0
Fuel Gas Mix Point H2S 30 55 28 1 0
SRU Tailgas Incinerator 1 SO2 1 0 0 1 0
SRU Tailgas Incinerator 1 O2 1 0 0 1 0
SRU Tailgas Incinerator 2 SO2 26 0 0 1 0
SRU Tailgas Incinerator 2 O2 26 0 0 1 0

4
Type Code 280 (COMS Attenuator Filters) Procedure 3
Point Source &
Location
Attenuator
I.D.
Attenuator
Certification
Date
Certified
Attenuator
Opacity
OPLR,
SECR,
or
PLCF
Corrected
Opacity
Value
Range
Low,
Mid,
&
High
Certification
1-year or
5-year
FCC Regenerator Vent
Flue Gas Duct
DHT200
/14108330 3/4/24 12.90 0.90 21.68 Low 1 Year
FCC Regenerator Vent
Flue Gas Duct
DHT200
/14108330 3/4/24 24.60 0.90 39.4 Mid 1 Year
FCC Regenerator Vent
Flue Gas Duct
DHT200
/14108330 3/4/24 36.80 0.90 55.33 High 1 Year

Type Code 281 (Procedure 3 - COMS Filter Audit Calibration Error)
Point
Source Location Audit
Date
Opacity Monitor
Response
(Average of 5) Mean
Difference
Calibration
Error (≤ 3%)
Low Mid High
FCC Regenerator Vent Flue Gas Duct 8/7/24 7 0.005 1.149
FCC Regenerator Vent Flue Gas Duct 8/7/24 7 0.002 0.750
FCC Regenerator Vent Flue Gas Duct 8/7/24 7 -0.009 1.761

Pollutant Concentration
Exceeded Span of CEM
Monitor Outage During
Point Source Operation
Alternate
Sampling CEM Modifications
34 Hours 763 Hours 0 Hours 0 Events

SOURCE INSPECTION
SUMMARY EVALUATION: Chevron maintains its CEMS as required in R307-170 and 40 CFR
60.13.

CURRENT
RECOMMENDATIONS: All deviations appear to be a result of breakdown or process related
problems that do not warrant issuing a violation. Chevron was in
compliance during this reporting period. No further enforcement
actions should be taken. Chevron’s NSPS monitoring system meets
the performance standards of 40 CFR 60, Appendix B Performance
Specifications.

HIGH PRIORITY
VIOLATOR (HPV): No

RECOMMENDATION
FOR NEXT INSPECTION: Check DAS for daily zero and span drift.
Check the QC program to ensure that monitor drift is being tracked
and that the source can identify excessive drift.

ATTACHMENTS: Excel spreadsheet review

Ms. Serena Yau
Chevron Salt Lake Refinery
685 South Chevron Way
North Salt Lake, Utah 84054

Dear Ms. Yau:
I am writing in response to your letter to EPA Region 8, dated October 27, 2020, in which you
seek an alternative test method for use on Flare1 and Flare 2 at Chevron’s Salt Lake Refinery
(Salt Lake) located in Salt Lake City, Davis County, Utah. It is our understanding that this
facility is subject to 40 CFR part 60, Subpart Ja, Standards of Performance for Petroleum
Refineries for Which Construction, Reconstruction, or Modification Commenced After May 14,
2007 (Subpart Ja). The Office of Air Quality Planning and Standards (OAQPS), as the delegated
authority, must make the determination on any major alternatives to test methods and procedures
required under 40 CFR parts 59, 60, 61, 63 and 65. Your proposed test method alternatives and
our approval decisions are discussed below.

According to the information provided, Flare 1 and Flare 2 at Salt Lake are subject to section
60.107a(a)(2) of Subpart Ja, which requires that a hydrogen sulfide (H2S) continuous monitoring
system (CEMS) be used to comply with the emission limits found in section 60.103a(h) of
Subpart Ja. Section 60.107a(a)(2) of Subpart Ja also requires an H2S CEMS be installed,
operated and maintained according to 40 CFR part 60, appendix B, Performance Specification 7
(PS-7), and the use of Method 11, 15, or 15A of Appendix A-5 to 40 CFR part 60 or Method 16
of Appendix A-6 to 40 CFR part 60 for conducting the relative accuracy test. Following section
60.107a(a)(2), you are required to comply with the applicable quality assurance procedures in
Appendix F to 40 CFR part 60, specifically Procedure 1 (40 CFR 60, Appendix F), which
requires the annual relative accuracy test of each H2S CEMS.

Based on the information you provided, Flare 1 and Flare 2 are both equipped with a flare vapor
recovery (FVR) system. These FVR systems employ a water seal to prevent flaring, unless there
is sufficient pressure on the seal for flare gas to break through. The vapors that do not break
through the water seal are compressed and recovered. The FVR system prevents flaring the vast
majority of the time. The H2S CEMS are located downstream of these water seals which means
that when these water seals are intact, which is typical, there is no flare gas being sampled by the
H2S CEMS. This intermittent flaring makes conducting a relative accuracy test on an H2S CEMS
on Flare 1 and Flare 2 difficult. As a result of the difficulty associated with conducting a relative
1/12/2021
2

accuracy test on these H2S CEMSs, you seek to use the alternative relative accuracy procedure
provided in section 16.2 of 40 CFR part 60, Appendix B, Performance Specification 2 (PS-2) and
referenced as an alternative to the relative accuracy test in sections 60.107a(e)(1)(ii) and (2)(ii)
of Subpart Ja. The alternative procedure requested allows for the completion of the alternative
relative accuracy procedures found in section 16.0 of PS-2 in lieu of the relative accuracy test
procedures for an H2S CEMS specified in PS-7.

We have reviewed your request and the associated rule language and recognize that it can be
difficult to perform relative accuracy tests of the H2S CEMSs installed on these units that do not
consistently combust flare gas. Based on the information contained in your request on the
intermittent flare gas flows, we approve the use of the alternative testing approach found in
section 16.0 of PS-2, which allows cylinder gases to be used as an alternative to the relative
accuracy test for H2S CEMSs, with the following caveats for each test:
• This alternative test method is only approved for use on the two H2S CEMSs installed on
Flare 1 and Flare 2 at Chevron’s Salt Lake Refinery.
• The alternative relative accuracy procedures approved herein are an alternative to the
relative accuracy test required by PS-7 and Procedure 1.
• When conducting the alternative relative accuracy test, you must follow the procedures
for performing the alternative relative accuracy test described in section 16.2 of PS-2 and
meet the criteria specified in section 16.3 of PS-2.
• The gas quality for the cylinder gases used to conduct the alternative relative accuracy
tests must meet the Protocol Gas requirements defined in section 16.2.4 of PS-2, to an
accuracy of at least 3 percent, or the cylinder gas material must be vendor certified as
traceable to a NIST standard at 3 percent accuracy if Protocol Gases are not available at
the concentration necessary for the alternative relative accuracy test.
• The alternative relative accuracy procedures must be performed periodically as defined in
section 60.107a(a)(1)(v) of Subpart Ja.
• A copy of this approval letter must be included in the report detailing the results of the
alternative relative accuracy procedures.

If you have any questions regarding this determination, please contact Kim Garnett at 919-541-
1158 or [e-mail].

Sincerely,

Steffan M. Johnson, Leader
Measurement Technology Group
STEFFAN
JOHNSON
Digitally signed by STEFFAN
JOHNSON Date: 2021.01.12 08:43:07 -05'00'
3

cc: Rachel Agnew, Chevron ([e-mail])
Kim Garnett, EPA/OAQPS/AQAD ([e-mail])
Jeremy Marsigli, Utah DEQ ([e-mail])
Laurie Ostrand, EPA R8 ([e-mail])
Brenda Shine, EPA/OAQPS/SPPD ([e-mail])

Chevron Refinery EER 3Q2024
Point Source Information Late Expired Cal. Gas Valid Cal. Gas Days Yes No
1 Type Code 100(Company Information)Type Code Company Manager Company Name AIRS # Phone Number
Environmental Contact
1 100 Troy Tortorich 01100003 [phone] Tony Pollock
1 100 0 0 0 0
1 Type Code 110
(Point Source Identification)Type Code Point Source
Quarter
1 - 4 Year
Point Source
Operating Hrs. in Quarter1 110 3 2024 1695
1 110 3 2024 2208
1 110 3 2024 2208
1 110 3 2024 2208
1 110 3 2024 2208
1 110 3 2024 2208
1 110 3 2024 2208
1 110 3 2024 2208
1 110 0 0 0
1 Type Code 200
(Monitor Identification)Type Code Point Source Channel Manufacturer Model No. Monitor SN Low Span High Span Installation Date
Monitor
Location
1 200 NOx Ametek Western Research9900 ZE-9900-10941-10 500 8/17/2018 F11007
1 200 O2 Ametek Western Research9900 ZE-9900-10941-10 21 8/17/2018 F11007
1 200 CO Siemens Ultramat 6 J6-783 0 1000 4/16/2020 K3223
1 200 CO2 Siemens Ultramat 6/Oxymat 6J7-447 0 25 4/16/2020 K3223
1 200 NOx Ametek Western Research9900 ZW-9900-S1334-10 200 4/16/2020 K3223
1 200 O2 Siemens Ultramat 6/Oxymat 6J7-447 0 10 4/16/2020 K3223
1 200 Opacity Sick/Maihak DHT200 0 100 10/5/2013 K3223
1 200 SO2 Siemens Ultramat 6E J6-783 0 200 4/16/2020 K3223
1 200 H2S Siemens Maxum Edition II #300194969000100 300 2/3/2010 V75220
1 200 TRS Atom FGA-100 140011 0 250000 11/5/2015 V75220
1 200 H2S Siemens Maxum Edition II #300194969000200 300 11/5/2010 V75120
1 200 TRS Atom FGA-100 140012 0 250000 11/4/2015 V75120
1 200 H2S Siemens Maxum Edition II #3001946900020 0 300 11/6/2019 D35014
1 200 TRS Atom FGA-100 18002 0 250000 11/6/2019 D35014
1 200 H2S Siemens Maxum Edition II #30019536380010ump 300 12/6/2009 V-113
1 200 O2 Ametek Ametek 9900 ZW-9900-S1332-10 21 9/1/2021 F-6550
1 200 SO2 Ametek Ametek 9900 ZW-9900-S1332-10 500 9/1/2021 F-6550
1 200 O2 Ametek Ametek 9000 AV9000WM-10235-1A0 21 12/16/2010 F-68250
1 200 SO2 Ametek Ametek 9000 AV9000WM-10235-1A0 500 12/16/2010 F-68250
1 200 0 0 0 0 0 0 1/0/1900 0
1
Type Code310
(Excess Emissions)SUMMARY REPORT Type Code Channel
Total Hours of Excess Emissions
Excess Emissions -
% of Total Operating Hours
RC 701 Hours -
start up/Shutdown
RC 702 Hours-
Control Equipment Problems
RC 703 Hours -Process Problems
RC 704, 706, 707
Hours -Other Known Causes
RC 705 Hours -
Unknown Causes
Emission Limitation
Emission
Limitation Units
Emission
Limitation
Averaging
Period1 TRUE 310 Opacity 0 0.00% 0 0 0 0 0 30 % 6min
1 TRUE 310 Opacity 0 0.00% 0 0 0 0 0 20 % 3hrRA
1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 50 ppm 7dRA
1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 25 ppm 365dRA
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 106 ppm 7dRA
1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 80 ppm 7dRA
1 TRUE 310 CO 0 0.00% 0 0 0 0 0 500 ppm hour
1 TRUE 310 H2S 3 0.14% 0 3 0 0 0 162 ppm 3hrRA
1 TRUE 310 H2S 55 2.49% 0 22 2 31 0 162 ppm 3hrRA
1 TRUE 310 H2S 0 0.00% 0 0 0 0 0 162 ppm 3hrRA
1 TRUE 310 H2S 0 0.00% 0 0 0 0 0 162 ppm 3hrRA
1 TRUE 310 H2S 0 0.00% 0 0 0 0 0 60 ppm 365dRA
1 TRUE 310 SO2 10 0.45% 0 10 0 0 0 250 ppm 12hrRA
1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 250 ppm 12hrRA
1 310 0 0 0 0 0 0 0 0 0
1 Type Code 300 (CMS
Performance Summary) Type Code Channel
Point Source Operating
Hours
Downtime - % of Total Operating
Hours
Total CMS
Downtime
RC 721 Hours - Monitor
Malfunction
RC 722 Hours - Non-monitor
Malfunction
RC 723 Hours -
QA Calibrations
RC 724 Hours - Other Known
Causes
RC 725
Hours -
Unknown
Causes
1 TRUE 300 NOx 1695 2.06% 35 33.5 0 0.5 1 0
1 TRUE 300 O2 1695 2.06% 35 33.5 0 0.5 1 0
1 TRUE 300 Opacity 2208 0.09% 1.9 0 0 0.3 1.6 0
1 TRUE 300 CO 2208 2.36% 52 0.75 0 46.5 4.75 0
1 TRUE 300 NOx 2208 2.36% 52 0.75 0 46.5 4.75 0
1 TRUE 300 SO2 2208 2.36% 52 0.75 0 46.5 4.75 0
1 TRUE 300 CO2 2208 2.36% 52 0.75 0 46.5 4.75 0
1 TRUE 300 O2 2208 2.36% 52 0.75 0 46.5 4.75 0
1 TRUE 300 H2S 2208 3.00% 66.25 39.75 0 24 2.5 0
1 TRUE 300 TRS 2208 0.16% 3.5 0 1 0 2.5 0
1 TRUE 300 H2S 2208 2.54% 56 0 0 29 27 0
1 TRUE 300 TRS 2208 1.71% 37.75 36.25 0 0 1.5 0
1 TRUE 300 H2S 2208 1.96% 43.25 0.25 17.25 22 3.75 0
1 TRUE 300 TRS 2208 2.41% 53.25 33 17.25 0 3 0
1 TRUE 300 H2S 2208 5.17% 114.25 30.25 55.25 27.75 1 0
1 TRUE 300 SO2 2208 0.09% 2 1 0 0 1 0
1 TRUE 300 O2 2208 0.07% 1.5 1 0 0 0.5 0
1 TRUE 300 SO2 2208 1.21% 26.75 25.75 0 0 1 0
1 TRUE 300 O2 2208 1.21% 26.75 25.75 0 0 1 0
1 300 0 0 0 0 0 0
Flare #3
Flare #1
Flare #1
Flare #2
Flare #2
Flare #3
Fuel Gas Mix Point
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 2
SRU Tailgas Incinerator 2
0
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 2
0
Chevron Products Co.
0
Boiler #7
Boiler #7
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
Flare #1
Flare #1
Flare #2
FCC Regenerator Vent
FCC Regenerator Vent
Flare #1
Flare #2
Flare #3
FCC Regenerator Vent
FCC Regenerator Vent
Flare #2
Flare #3
Flare #3
Fuel Gas Mix Point
SRU Tailgas Incinerator 1
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
Fuel Gas Mix Point
Fuel Gas Mix Point
Boiler #7
Boiler #7
FCC Regenerator Vent
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 2
Boiler #7
FCC Regenerator Vent
Flare #1
Flare #2
Flare #3
Fuel Gas Mix Point
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 2
0
SRU Tailgas Incinerator 2
0
Point Source
Point Source
Chevron Refinery EER 3Q2024
1
Type Code 250
(Performance SpecificationRATA Results)Type Code Channel
Date of Most Current RATA Date of Preceding RATA Months Between RATA's Units of Measurement CEM Value Reference Method Value Relative accuracy Pass/ Fail
1 377 Days 250 NOx 08/27/24 08/16/23 12 ppm 0.081 0.072 0.01% P
1 377 Days 250 O2 08/27/24 08/16/23 12 0 3.8 3.8 1.80% P
1 378 Days 250 SO2 08/26/24 08/14/23 12 ppm 5.6 1.5 9.02% P
1 378 Days 250 NOx 08/26/24 08/14/23 12 ppm 9.6 1.5 1.24% P
1 378 Days 250 CO 08/26/24 08/14/23 12 ppm 95.4 93.5 0.62% P
1 378 Days 250 CO2 08/26/24 08/14/23 12 ppm 17.7 18 1.94% P
1 378 Days 250 O2 08/26/24 08/14/23 12 0 2 2 1.79% P
1 0 Days 250 H2S 09/21/20 09/21/20 12 ppm 8.9 5.81 3.30% P
1 0 Days 250 H2S 09/22/20 09/22/20 12 ppm 8.29 5.39 2.93% P
1 362 Days 250 H2S 08/20/24 08/24/23 12 ppm 0 0.07 0.10% P
1 360 Days 250 H2S 08/19/24 08/25/23 12 ppm 0.12 0.1 0.16% P
1 372 Days 250 SO2 08/21/24 08/15/23 12 ppm 65.1 74.1 13.66% P
1 372 Days 250 SO2 08/21/24 08/15/23 12 lb./hr. 1.5 1.7 15.74% P
1 372 Days 250 O2 08/21/24 08/15/23 12 0 3.7 3.8 1.33% P
1 367 Days 250 SO2 08/22/24 08/21/23 12 ppm 139.1 165.2 18.03% P
1 367 Days 250 SO2 08/22/24 08/21/23 12 lb./hr. 2.2 3.3 5.41% P
1 367 Days 250 O2 08/22/24 08/21/23 12 0 8.4 8.4 1.21% P
1 0 Days 250 0 01/00/00 01/00/00 0 0 0 0 0.00% 0
1 Type Code 260
(CGA Results)Type Code Channel Date Audit Point No. Cylinder ID
Cylinder
Expiration Date
Type of
Certification
Units of
Measurement CEM Value Cylinder
Value
Precision
%Pass/ Fail Range - High or
Low
1 Valid Cal. Gas 260 NOx 08/28/24 1 CC63048 06/02/31 EPA Traceability Protocol (Sept. 1997)ppm 136.1 135.4 52.00% P Low
1 Valid Cal. Gas 260 NOx 08/28/24 2 CC3688 06/02/31 EPA Traceability Protocol (Sept. 1997)ppm 280.2 276.1 148.00% P High
1 Valid Cal. Gas 260 O2 08/28/24 1 EB0027762 06/02/31 EPA Traceability Protocol (Sept. 1997)ppm 5 5 -79.00% P High
1 Valid Cal. Gas 260 O2 08/28/24 2 CC316355 05/01/26 EPA Traceability Protocol (Sept. 1997)ppm 8.1 8 112.00% P High
1 Valid Cal. Gas 260 CO 08/08/24 1 CC96320 06/02/31 EPA Traceability Protocol (Sept. 1997)ppm 237.1 249.9 -513.00% P Low
1 Valid Cal. Gas 260 CO 08/08/24 2 EB0157339 08/02/31 EPA Traceability Protocol (Sept. 1997)ppm 522.4 552.2 -540.00% P High
1 Valid Cal. Gas 260 CO2 08/08/24 1 CC200802 03/20/31 EPA Traceability Protocol (Sept. 1997)ppm 6.5 6.5 -107.00% P Low
1 Valid Cal. Gas 260 CO2 08/08/24 2 CC487479 03/02/31 EPA Traceability Protocol (Sept. 1997)ppm 14 14 14.00% P High
1 Valid Cal. Gas 260 NOx 08/08/24 1 CC320573 01/03/31 EPA Traceability Protocol (Sept. 1997)ppm 56.7 55.5 218.00% P Low
1 Valid Cal. Gas 260 NOx 08/08/24 2 CC262317 05/23/30 EPA Traceability Protocol (Sept. 1997)ppm 111.3 111.1 21.00% P High
1 Valid Cal. Gas 260 O2 08/08/24 1 EB0123082 05/31/31 EPA Traceability Protocol (Sept. 1997)% 5.1 5 220.00% P Low
1 Valid Cal. Gas 260 O2 08/08/24 2 EB0141908 05/31/31 EPA Traceability Protocol (Sept. 1997)% 8.2 8.1 149.00% P High
1 Valid Cal. Gas 260 SO2 08/08/24 1 CC733445 08/22/30 EPA Traceability Protocol (Sept. 1997)ppm 54.3 55.08 -143.00% P Low
1 Valid Cal. Gas 260 SO2 08/08/24 2 SG912106BAL 08/29/30 EPA Traceability Protocol (Sept. 1997)ppm 108.5 110.3 -163.00% P High
1 Valid Cal. Gas 260 H2S 08/12/24 1 CC160176 04/04/27 EPA PROTOCOL II GASppm 79.4 71.44 1114.00% P Low
1 Valid Cal. Gas 260 H2S 8/12/24 2 CC18776 10/19/26 EPA PROTOCOL II GASppm 166 159 4 P High
1 Valid Cal. Gas 260 TRS 8/12/24 1 CC97784 12/16/24 EPA PROTOCOL II GASppm 12,147 12,526 -3 P Low
1 Valid Cal. Gas 260 TRS 8/12/24 2 EB0140133 9/21/25 EPA PROTOCOL II GASppm 25,951 27,571 -6 P High
1 Valid Cal. Gas 260 H2S 8/7/24 1 ALM040013 6/30/26 EPA PROTOCOL II GASppm 75 70 7 P Low
1 Valid Cal. Gas 260 H2S 8/7/24 2 CC906612 6/9/26 EPA PROTOCOL II GASppm 167 159 5 P High
1 Valid Cal. Gas 260 TRS 8/7/24 1 CC341983 12/4/26 EPA PROTOCOL II GASppm 12,610 12,657 0 P Low
1 Valid Cal. Gas 260 TRS 8/7/24 2 EB0155296 4/13/26 EPA PROTOCOL II GASppm 27,212 27,525 -1 P High
1 Valid Cal. Gas 260 H2S 8/13/24 1 CC148981 5/28/26 EPA PROTOCOL II GASppm 69 70 -2 P Low
1 Valid Cal. Gas 260 H2S 8/13/24 2 CC475553 4/8/27 EPA PROTOCOL II GASppm 152 163 -7 P High
1 Valid Cal. Gas 260 TRS 8/13/24 1 CC231302 4/26/25 EPA PROTOCOL II GASppm 2,394 2,491 -4 P Low
1 Valid Cal. Gas 260 TRS 8/13/24 2 CC260070 4/12/25 EPA PROTOCOL II GASppm 5,244 5,553 -6 P High
1 Valid Cal. Gas 260 H2S 8/6/24 1 ALM044045 3/8/27 EPA Traceability Protocol (Sept. 1997)ppm 71 71 0 P Low
1 Valid Cal. Gas 260 H2S 8/6/24 2 CC429272 4/5/27 EPA Traceability Protocol (Sept. 1997)ppm 168 162 4 P High
1 Valid Cal. Gas 260 O2 8/8/24 1 ALM054666 4/26/27 EPA Traceability Protocol (Sept. 1997)ppm 5 5 -5 P Low
1 Valid Cal. Gas 260 O2 8/8/24 2 ALM020453 12/12/30 EPA Traceability Protocol (Sept. 1997)ppm 8 8 -3 P High
1 Valid Cal. Gas 260 SO2 8/6/24 1 CC107467 8/29/30 EPA Traceability Protocol (Sept. 1997)ppm 126 126 0 P Low
1 Valid Cal. Gas 260 SO2 8/6/24 2 EB0134129 11/22/29 EPA Traceability Protocol (Sept. 1997)ppm 252 252 0 P High
1 Valid Cal. Gas 260 O2 8/7/24 1 EB0105270 5/31/30 EPA Traceability Protocol (Sept. 1997)ppm 5 5 0 P Low
1 Valid Cal. Gas 260 O2 8/7/24 2 CC741651 8/23/29 EPA Traceability Protocol (Sept. 1997)ppm 8 8 0 P High
1 Valid Cal. Gas 260 SO2 8/7/24 1 CC356043 11/1/30 EPA Traceability Protocol (Sept. 1997)ppm 121 123 -2 P Low
1 Valid Cal. Gas 260 SO2 8/7/24 2 ALM047181 2/1/27 EPA Traceability Protocol (Sept. 1997)ppm 241 250 -4 P High
1 260 0 1/0/00 0 0 1/0/00 0 0 0 0 0 0 0
1 Type Code 270(Linearity Test Results)Type Code Channel Date Audit Point No. Cylinder ID
Cylinder Expiration Date Type of Certification Units ofMeasurement CEM Value Cylinder Value Precision%Pass/ Fail Range - High or Low
1 270 0 01/00/00 0 0 01/00/00 0 0 0 0 0.00% 0 00
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 2
SRU Tailgas Incinerator 2
SRU Tailgas Incinerator 2
SRU Tailgas Incinerator 2
0
Flare #3
Flare #3
Fuel Gas Mix Point
Fuel Gas Mix Point
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
Boiler #7
Boiler #7
Flare #3
Flare #3
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
Flare #2
Flare #2
Flare #2
Flare #1
Boiler #7
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
Boiler #7
0
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 2
SRU Tailgas Incinerator 2
FCC Regenerator Vent
Flare #1
Flare #2
Flare #3
Fuel Gas Mix Point
Boiler #7
Boiler #7
SRU Tailgas Incinerator 2
Point Source
Point Source
Point Source
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
FCC Regenerator Vent
Flare #1
Flare #1
Flare #1
Flare #2
Chevron Refinery EER 3Q2024
1
Type Code 210
(Pollutant ConcentrationExceeded Span of CEM)Type Code Channel Start Date Start Time End Date End Time Hours
1 34 210 H2S 7/3/24 10:12 7/3/24 10:16 0.07
1 34 210 H2S 7/3/24 10:20 7/3/24 10:24 0.07
1 69 210 H2S 7/3/24 10:37 7/3/24 10:46 0.15
1 TRUE 210 H2S 8/8/24 14:38 8/8/24 14:41 0.05
1 210 H2S 8/12/24 10:54 8/12/24 11:03 0.15
1 210 H2S 8/18/24 19:46 8/18/24 19:51 0.08
1 210 H2S 9/17/24 11:17 9/17/24 11:38 0.35
1 210 H2S 9/17/24 11:42 9/17/24 11:51 0.15
1 210 H2S 9/17/24 11:59 9/17/24 12:03 0.07
1 210 H2S 9/17/24 12:12 9/17/24 12:30 0.30
1 210 H2S 9/17/24 12:33 9/17/24 12:47 0.23
1 210 H2S 9/17/24 13:18 9/17/24 13:22 0.07
1 210 H2S 9/17/24 13:26 9/17/24 13:39 0.22
1 210 H2S 9/17/24 13:47 9/17/24 13:56 0.15
1 210 H2S 9/17/24 14:05 9/17/24 14:22 0.28
1 210 H2S 7/3/24 9:58 7/3/24 10:02 0.07
1 210 H2S 7/3/24 10:24 7/3/24 10:32 0.13
1 210 H2S 7/3/24 10:43 7/3/24 10:46 0.05
1 210 H2S 7/16/24 19:09 7/16/24 19:12 0.05
1 210 H2S 7/16/24 19:16 7/16/24 19:35 0.32
1 210 H2S 7/16/24 19:46 7/16/24 20:20 0.57
1 210 H2S 7/16/24 20:23 7/16/24 20:27 0.07
1 210 H2S 7/26/24 20:52 7/26/24 20:56 0.07
1 210 H2S 7/26/24 20:58 7/26/24 21:03 0.08
1 210 H2S 7/26/24 21:07 7/26/24 21:18 0.18
1 210 H2S 7/26/24 21:21 7/26/24 21:25 0.07
1 210 H2S 7/26/24 21:32 7/26/24 21:52 0.33
1 210 H2S 8/18/24 19:39 8/18/24 19:47 0.13
1 210 H2S 8/18/24 19:50 8/18/24 19:53 0.05
1 210 H2S 8/18/24 19:58 8/18/24 20:09 0.18
1 210 H2S 8/18/24 20:20 8/18/24 20:47 0.45
1 210 H2S 8/18/24 20:50 8/18/24 21:38 0.80
1 210 H2S 8/18/24 21:57 8/18/24 22:02 0.08
1 210 H2S 8/18/24 22:21 8/18/24 22:24 0.05
1 210 H2S 8/18/24 22:27 8/18/24 22:54 0.45
1 210 H2S 8/18/24 22:58 8/18/24 23:24 0.43
1 210 H2S 8/19/24 3:24 8/19/24 3:35 0.18
1 210 H2S 8/19/24 3:50 8/19/24 4:02 0.20
1 210 H2S 8/19/24 4:40 8/19/24 4:47 0.12
1 210 H2S 9/8/24 23:41 9/8/24 23:44 0.05
1 210 H2S 9/8/24 23:52 9/8/24 23:59 0.12
1 210 H2S 9/9/24 0:03 9/9/24 0:11 0.13
1 210 H2S 9/9/24 0:18 9/9/24 1:04 0.77
1 210 H2S 9/9/24 7:21 9/9/24 9:14 1.88
1 210 H2S 9/17/24 11:29 9/17/24 11:37 0.13
1 210 H2S 9/17/24 11:44 9/17/24 11:48 0.07
1 210 H2S 9/17/24 12:03 9/17/24 12:15 0.20
1 210 H2S 9/17/24 12:21 9/17/24 12:37 0.27
1 210 H2S 9/17/24 12:41 9/17/24 13:15 0.57
1 210 H2S 9/17/24 13:18 9/17/24 13:22 0.07
1 210 H2S 9/17/24 13:26 9/17/24 13:30 0.07
1 210 H2S 9/17/24 13:37 9/17/24 13:45 0.13
1 210 H2S 9/17/24 13:48 9/17/24 13:52 0.07
1 210 H2S 9/17/24 13:56 9/17/24 14:04 0.13
1 210 H2S 9/17/24 14:07 9/17/24 14:34 0.45
1 210 H2S 9/17/24 14:52 9/17/24 15:29 0.62
1 210 H2S 9/17/24 16:11 9/17/24 16:41 0.50
1 210 H2S 9/17/24 17:30 9/17/24 17:34 0.07
1 210 H2S 9/17/24 17:45 9/17/24 19:11 1.43
1 210 H2S 9/17/24 19:22 9/17/24 19:30 0.13
1 210 H2S 9/17/24 19:37 9/17/24 20:56 1.32
1 210 H2S 9/17/24 21:11 9/17/24 21:19 0.13
1 210 H2S 9/17/24 21:25 9/17/24 21:41 0.27
1 210 H2S 9/19/24 9:34 9/19/24 9:49 0.25
1 210 H2S 9/19/24 9:56 9/19/24 10:01 0.08
1 210 H2S 9/19/24 10:08 9/19/24 10:34 0.43
1 210 H2S 9/19/24 12:56 9/19/24 13:01 0.08
1 210 H2S 9/19/24 13:12 9/19/24 13:15 0.05
1 210 H2S 9/19/24 13:19 9/19/24 13:38 0.32
1 210 H2S 9/19/24 13:41 9/19/24 14:49 1.13
1 210 H2S 9/19/24 15:08 9/19/24 17:53 2.75
1 210 H2S 9/23/24 7:47 9/23/24 7:54 0.12
1 210 H2S 9/23/24 7:59 9/23/24 8:10 0.18
1 210 H2S 9/23/24 8:12 9/23/24 8:20 0.13
1 210 H2S 9/23/24 8:24 9/23/24 8:32 0.13
1 210 H2S 9/23/24 8:47 9/23/24 8:50 0.05
1 210 H2S 9/23/24 9:01 9/23/24 9:13 0.20
1 210 H2S 9/23/24 9:16 9/23/24 9:21 0.08
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #1
Flare #1
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #1
Flare #1
Flare #1
Flare #1
Flare #1
Flare #1
Flare #1
Flare #1
Flare #1
Flare #1
Flare #1
Flare #1
Flare #1
Point Source
Chevron Refinery EER 3Q2024
1 210 H2S 9/23/24 9:31 9/23/24 9:43 0.20
1 210 H2S 9/23/24 9:47 9/23/24 9:50 0.05
1 210 H2S 9/23/24 9:54 9/23/24 10:01 0.12
1 210 H2S 9/23/24 10:05 9/23/24 10:09 0.07
1 210 H2S 9/23/24 10:12 9/23/24 10:21 0.15
1 210 H2S 9/23/24 10:28 9/23/24 10:36 0.13
1 210 H2S 9/23/24 10:47 9/23/24 10:54 0.12
1 210 H2S 9/23/24 11:05 9/23/24 11:12 0.12
1 210 H2S 9/23/24 11:25 9/23/24 11:31 0.10
1 210 H2S 9/23/24 11:36 9/23/24 11:47 0.18
1 210 H2S 9/23/24 11:50 9/23/24 11:54 0.07
1 210 H2S 9/23/24 12:05 9/23/24 12:12 0.12
1 210 H2S 9/23/24 12:20 9/23/24 12:31 0.18
1 210 H2S 9/23/24 12:47 9/23/24 13:21 0.57
1 210 H2S 9/23/24 14:05 9/23/24 15:21 1.27
1 210 H2S 9/23/24 15:28 9/23/24 15:36 0.13
1 210 H2S 9/23/24 15:39 9/23/24 15:47 0.13
1 210 H2S 9/23/24 20:28 9/23/24 20:47 0.32
1 210 H2S 9/23/24 22:05 9/23/24 22:32 0.45
1 210 H2S 9/24/24 4:31 9/24/24 5:17 0.77
1 210 H2S 7/23/24 11:18 7/23/24 11:23 0.08
1 210 H2S 7/23/24 11:27 7/23/24 11:40 0.22
1 210 H2S 7/23/24 13:11 7/23/24 13:19 0.13
1 210 H2S 7/23/24 13:32 7/23/24 13:36 0.07
1 210 H2S 7/23/24 14:58 7/23/24 15:03 0.08
1 210 H2S 7/23/24 15:20 7/23/24 15:29 0.15
1 210 H2S 7/23/24 19:34 7/23/24 19:43 0.15
1 210 SO2 7/24/24 11:03 7/24/24 11:51 0.80
1 210 SO2 7/24/24 11:53 7/24/24 11:58 0.08
1 210 SO2 9/24/24 14:53 9/24/24 14:59 0.10
1 210 SO2 9/24/24 15:02 9/24/24 15:07 0.08
1 210 SO2 9/24/24 15:44 9/24/24 15:59 0.25
1 210 SO2 9/24/24 16:01 9/24/24 19:41 3.67
1 210 SO2 9/26/24 12:39 9/26/24 12:46 0.12
1 210 SO2 9/27/24 7:31 9/27/24 7:35 0.07
1 210 0 1/0/00 0:00 1/0/00 0:00
1
1 Yes
1 34.48 TC 220 Hours 763.15 TC 220 Hours 0.00 TC 230 Hours 0.00 Events 0.00 Hours 0.00 Events 0.00 0.00
1 763.15 TC 300 Hours 0.00 TRUE
SRU Tailgas Incinerator 2
0
Flare #3
Flare #3
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 1
SRU Tailgas Incinerator 2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #3
Flare #3
Flare #3
Flare #3
Flare #3
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Flare #2
Type Code 210
(Pollutant Concentration
Exceeded Span of CEM)
Type Code 220
(Monitor Outage
During Point Source Operation)
Type Code 230
(Manual Sample - AlternateSampling During Monitor
Outage)
Type Code 240(CEM Modifications)
Type Code 530
(Excess Emissions During
Emergency Conditions)
Type Code 450(Data Excluded)
Type Code 550
(Changes in Operation in Control Equipment When
CEM Data Not Available)
Type Code 500
(Boiler Operating Days
w/o 18 Hours of Data)
Yes None Reported None Reported None Reported None Reported None Reported None Reported
Chevron Refinery EER 3Q2024
Relative Accuracy Overview
Point Source Channel
Date of Most
Current
RATA
Date of
Preceding
RATA
Months Between
RATA's
Units
Measured CEM Value Reference Method
Value
Relative
Accuracy Pass/ Fail 2024
Boiler #7 NOx 08/27/24 08/16/23 12 ppm 0.081 0.07 0.01% P
Boiler #7 O2 08/27/24 08/16/23 12 3.8 3.80 1.80% P
FCC Regenerator Vent SO2 08/26/24 08/14/23 12 ppm 5.6 1.50 9.02% P
FCC Regenerator Vent NOx 08/26/24 08/14/23 12 ppm 9.6 1.50 1.24% P
FCC Regenerator Vent CO 08/26/24 08/14/23 12 ppm 95.4 93.50 0.62% P
FCC Regenerator Vent CO2 08/26/24 08/14/23 12 ppm 17.7 18.00 1.94% P
FCC Regenerator Vent O2 08/26/24 08/14/23 12 2 2.00 1.79% P
Flare #1 H2S 09/21/20 09/21/20 12 ppm 8.9 5.81 3.30% P
Flare #2 H2S 09/22/20 09/22/20 12 ppm 8.29 5.39 2.93% P
Flare #3 H2S 08/20/24 08/24/23 12 ppm 0 0.07 0.10% P
Fuel Gas Mix Point H2S 08/19/24 08/25/23 12 ppm 0.12 0.10 0.16% P
SRU Tailgas Incinerator 1 SO2 08/21/24 08/15/23 12 ppm 65.1 74.10 13.66% P
SRU Tailgas Incinerator 1 SO2 08/21/24 08/15/23 12 lb./hr. 1.5 1.70 15.74% P
SRU Tailgas Incinerator 1 O2 08/21/24 08/15/23 12 3.7 3.80 1.33% P
SRU Tailgas Incinerator 2 SO2 08/22/24 08/21/23 12 ppm 139.1 165.20 18.03% P
SRU Tailgas Incinerator 2 SO2 08/22/24 08/21/23 12 lb./hr. 2.2 3.30 5.41% P
SRU Tailgas Incinerator 2 O2 08/22/24 08/21/23 12 8.4 8.40 1.21% P
*
NSPS CGA Third 2024
Audit Gas Ranges Audit Gas Ranges
AP1 Low AP2 Low AP1 High AP2 High
Boiler #7 NOx 8/28/24 500 135.4 100 to 150
Boiler #7 NOx 8/28/24 500 276.1 250 to 300
Boiler #7 O2 8/28/24 21 5 4 to 6
Boiler #7 O2 8/28/24 21 8 8 to 12
FCC Regenerator Vent CO 8/8/24 1000 249.9 200 to 300
FCC Regenerator Vent CO 8/8/24 1000 552.2 500 to 600
FCC Regenerator Vent CO2 8/8/24 25 6.5 5 to 8
FCC Regenerator Vent CO2 8/8/24 25 14 10 to 14
FCC Regenerator Vent NOx 8/8/24 200 55.5 40 to 60
FCC Regenerator Vent NOx 8/8/24 200 111.1 100 to 120
FCC Regenerator Vent O2 8/8/24 10 5 4 to 6
FCC Regenerator Vent O2 8/8/24 10 8.1 8 to 12
FCC Regenerator Vent SO2 8/8/24 200 55.08 40 to 60
FCC Regenerator Vent SO2 8/8/24 200 110.3 100 to 120
Flare #1 H2S 8/12/24 300 71.44 60 to 90
Flare #1 H2S 8/12/24 300 159.3 150 to 180
Flare #1 TRS 8/12/24 250000 12526 50000 to 75000
Flare #1 TRS 8/12/24 250000 27571 125000 to 150000
Flare #2 H2S 8/7/24 300 69.7 60 to 90
Flare #2 H2S 8/7/24 300 158.8 150 to 180
Flare #2 TRS 8/7/24 250000 12657 50000 to 75000
Flare #2 TRS 8/7/24 250000 27525 125000 to 150000
Flare #3 H2S 8/13/24 300 70.46 60 to 90
Flare #3 H2S 8/13/24 300 163 150 to 180
Flare #3 TRS 8/13/24 250000 2491 50000 to 75000
Flare #3 TRS 8/13/24 250000 5553 125000 to 150000
Fuel Gas Mix Point H2S 8/6/24 300 70.76 60 to 90
Fuel Gas Mix Point H2S 8/6/24 300 161.6 150 to 180
SRU Tailgas Incinerator 1 O2 8/8/24 21 5.09 4 to 6
SRU Tailgas Incinerator 1 O2 8/8/24 21 8.04 8 to 12
SRU Tailgas Incinerator 1 SO2 8/6/24 500 125.7 100 to 150
SRU Tailgas Incinerator 1 SO2 8/6/24 500 251.6 250 to 300
SRU Tailgas Incinerator 2 O2 8/7/24 21 5.04 4 to 6
SRU Tailgas Incinerator 2 O2 8/7/24 21 7.97 8 to 12
SRU Tailgas Incinerator 2 SO2 8/7/24 500 123.2 100 to 150
SRU Tailgas Incinerator 2 SO2 8/7/24 500 249.5 250 to 300
*
Type Code 280 (COMS Attenuator Filters) Procedure 3
Point Source Location
Attenuator
I.D.
Attenuator
Certification Date
Certified Attenuator
Opacity
OPLR,
SECR, or
PLCF,
Corrected Opacity
Value
Range
Low, Mid, & High
Certification
1-year or 5-year
FCC Regenerator Vent Flue Gas
Duct DHT200 /14108330 3/4/24 13 0.8996 21.68
Low 1 Year
FCC Regenerator Vent Flue Gas
Duct DHT200 /14108330 3/4/24 25 0.8996 39.4
Mid 1 Year
FCC Regenerator Vent Flue Gas
Duct DHT200 /14108330 3/4/24 37 0.8996 55.33
High 1 Year
*
Opacity Monitor Response (Average of 5)
Low Range Mid Range High Range
FCC Regenerator Vent Flue Gas
Duct 8/7/24 7 0.005 0.005 0.007 1.149
FCC Regenerator Vent Flue Gas
Duct 8/7/24 7 0.002 0.002 0.005 0.750
FCC Regenerator Vent Flue Gas
Duct 8/7/24 7 -0.009 -0.009 0.008 1.761
Audit Gas Used High Span Audit Gas UsedPoint Source Channel Audit Date Low Span
Point
Source Location Audit Date Mean Difference Standard Deviation
Confidence
Coefficient
Calibration
Error (≤ 3%)
Type Code 281 (Procedure 3 - COMS Filter Audit Calibration Error)
Chevron Refinery EER 3Q2024
Monitoring Information TC 210, 230, & 240
Type Code 210
(Pollutant Concentration Exceeded Span of CEM) - 500 (All)
*
Sum of Hours Column Labels
Row Labels (blank) H2S SO2 Grand Total
(blank)0 0
Flare #1 2.52 2.52
Flare #2 25.92 25.92
Flare #3 0.88 0.88
SRU Tailgas Incinerator 1 4.98 4.98
SRU Tailgas Incinerator 2 0.18 0.18
Grand Total 0 29.32 5.17 34.48
*
Type Code 230
(Manual Sample - Alternate Sampling During Monitor Outage) - 500 (All)
*
Sum of Hours Column Labels
Row Labels (blank) Grand Total
(blank)0 0
Grand Total 0 0
*
Type Code 240
(CEM Modifications) - 100 (All)
*
Count of Channel Column Labels
Row Labels (blank) Grand Total
(blank)
(blank)
Grand Total
Chevron Refinery EER 3Q2024
Type Code 220
(Monitor Outage During Point Source Operation) - 600 (All)
*
Sum of Hours Column Labels
Row Labels 723 724 721 722 Grand Total
FCC Regenerator Vent
Opacity
Performed mechanical centering on Opacity. 0.3 0.3
Performed quarterly audit.1.6 1.6
CO
Performed quarterly audit.3.75 3.75
Daily Validations 46.5 46.5
Misc. calibration drift. Recalibrated and revalidated. 0.75 0.75
Replaced ammonia scrubber media and rebuilt sample pump, Cleaned
Probe. 1 1
CO2
Performed quarterly audit.3.75 3.75
Daily Validations 46.5 46.5
Misc. calibration drift. Recalibrated and revalidated. 0.75 0.75
Replaced ammonia scrubber media and rebuilt sample pump, Cleaned
Probe. 1 1
NOx
Performed quarterly audit.3.75 3.75
Daily Validations 46.5 46.5
Misc. calibration drift. Recalibrated and revalidated. 0.75 0.75
Replaced ammonia scrubber media and rebuilt sample pump, Cleaned
Probe. 1 1
SO2
Performed quarterly audit.3.75 3.75
Daily Validations 46.5 46.5
Misc. calibration drift. Recalibrated and revalidated. 0.75 0.75
Replaced ammonia scrubber media and rebuilt sample pump, Cleaned
Probe. 1 1
O2
Performed quarterly audit.3.75 3.75
Daily Validations 46.5 46.5
Misc. calibration drift. Recalibrated and revalidated. 0.75 0.75
Replaced ammonia scrubber media and rebuilt sample pump, Cleaned
Probe. 1 1
Flare #1
H2S
Performed quarterly audit.2.5 2.5
Daily Validations 24.00 24
Misc. calibration drift. Recalibrated and revalidated. 0.5 0.5
Performed complete sample system PM. Changed filters, replaced
nafion drier, rebuilt vacuum pump and replaced output presure
transmitter on 8/8, next day the system failed validation. Recalibrated
and revalidated. System passed without further issue.
33.75 33.75
Calibration drift. Cal gas regulator not controlling. Replaced regulators
that had been previously ordered. Calibrated and revalidated.
5.5 5.5
TRS
Performed quarterly audit.2.5 2.5
Technician replaced calibration gas bottle, and attempted a calibration
and validation. The wrong calibration gas value was entered which
caused a calibration drift as the technician was checking. The technician
then entered the correct cal gas value recalibrated and revalidated the
system.
1 1
Flare #2
H2S
Performed quarterly audit.1.5 1.5
Daily Validations 23.00 23
Performed PM. Nafion Drier was not heating up properly, and found a
leak in it as well. Replaced the Nafion Drier, it's thermocouple and
replaced all sample system filters.
6 6
Analyzer technicians inadvertantly left validation bottle closed after
performing CGA previous day. Technicians opened valve and revalidated
CEMS.
25.5 25.5
TRS
Performed quarterly audit.1.5 1.5
Analyzer team were notified of a failed validation. The team responded
and replaced the thermostat, and analyzer furnace. Then the team
calibrated and revalidated the analyzer. No further issues.
36.25 36.25
Chevron Refinery EER 3Q2024
Sum of Hours Column Labels
Row Labels 723 724 721 722 Grand Total
Flare #3
H2S
Performed quarterly audit.3.5 3.5
Daily Validations 22.00 22
Technicians opened the GC doors during checks, which dropped the GC
temperature slightly. This enabled the warning bit, but analyzer was still
sampling. No down time.
0.25 0.25
#N/A 0.25 0.25
At 3:00PM on 9/18 the CEMS went into fault status on low valve air.
Technicians caught the status failure during next morning validation
checks. Replaced the low zero grade air bottles, recalibrated and
revalidated.
17.25 17.25
TRS
Performed quarterly audit.3 3
At 3:00PM on 9/18 the CEMS went into fault status on low valve air.
Technicians caught the status failure during next morning validation
checks. Replaced the low zero grade air bottles, recalibrated and
revalidated.
17.25 17.25
During routine PM the zero calibration would not stabilize. Upon
investigation the technician found a pitted valve body which was
allowing span calibration gas to contaminate the zero gas. Through the
course of time the technician replaced the excimer, detector and valve
body. We have not had any issues since.
33 33
Fuel Gas Mix Point
H2S
Performed quarterly audit.0.5 0.5
Daily Validations 27.75 27.75
Calibration drift. Technicians searched for leaks and found a leaking
sample filter. Tightened filter. Recalibrated and revalidated.
30.25 30.25
Technicians had to change the cal gas value in the software. Then they
reran the validation. 0.5 0.5
H2 bottle developed a leak and caused a cal drift. Technicians replaced
the bottle and reran the daily validation. 29 29
Valve gas bottle developed a leak and caused a cal drift. Technicians
replaced the bottle and reran the daily validation. 26.25 26.25
SRU Tailgas Incinerator 1
SO2
Performed quarterly audit.1 1
Misc. calibration drift. Recalibrated and revalidated. 1 1
O2
Performed quarterly audit.0.5 0.5
Misc. calibration drift. Recalibrated and revalidated. 1 1
SRU Tailgas Incinerator 2
SO2
Performed quarterly audit.1 1
No validation occurred on on 9/19. On 9/20 technicians responded to a
cal drift and found that the SO2 span gas regulator had been turned
completely down.They increased the regulator for better flow and
initiated the daily validation. No further issues.
25.75 25.75
O2
Performed quarterly audit.1 1
No validation occurred on on 9/19. On 9/20 technicians responded to a
cal drift and found that the SO2 span gas regulator had been turned
completely down.They increased the regulator for better flow and
initiated the daily validation. No further issues.
25.75 25.75
Boiler #7
NOx
Performed quarterly audit.2 2
Misc. calibration drift. Recalibrated and revalidated. 7.5 7.5
O2 not reading corrrectly, found broken calibration gas tube and
repaired it. Calibrated and revalidated. 6.5 6.5
Technicians verified CEMS integrity for RATA. No issues were found. 1 1
Cal drift. Found low sample flow on analyzer. Replaced filter and
performed calibration and revalidated. 53 53
Grand Total 336.55 72.1 263.75 90.75 763.15
Chevron Refinery EER 3Q2024
Opy *Opy Count of Magnitude of Emissions Column Labels
Opy Row Labels Grand Total
Opy Grand Total
SO2 *
SO2 Type Code 410 (SO2) - 6000 (All)
SO2 *SO2 Count of Magnitude of Emissions Column LabelsSO2Row Labels 702 Grand Total
SO2
The SRU1 unit shut down on low combustion air. This was due to
the combustion air valve closing inadvertently while preparing
for maintenance. Operations team safely reopened the valve, followed written procedures and started the plant back up. The
refinery does not have a history of emissions associated with this
cause. SO2 SRU Tailgas Incinerator 1 10 10SO2Grand Total 10 10
NOx *
NOx Type Code 420 (NOx) - 6000 (All)
NOx *NOx Count of Magnitude of Emissions Column LabelsNOxRow Labels Grand Total
NOx Grand Total
H2S/TRS *
H2S/TRS Type Code 430
(H2S) - 6000 (All)
H2S/TRS *H2S/TRS Count of Magnitude of Emissions Column Labels
H2S/TRS Row Labels 702 703 704 Grand Total
H2S/TRS Flare #1
H2S/TRS
During a rain storm a level instrument had a false high level
indication. This caused 66LC304 to open which blew Hydrogen to V106. The sudden increase in pressure opened 66PC409C to flare
#1 and flare #2. This overwhelmed the flare vapor recovery
systems which breached through the water seal drum causing excess H2S over the 3 hour limit. Operations investigated the
instrument and rammed the leads to clear the false high level
reading. The H2S soon fell below exceedance levels. The refinery
does not have a history of emissions associated with this cause.
3 3
H2S/TRS Flare #2
H2S/TRS
During a rain storm a level instrument had a false high level
indication. This caused 66LC304 to open which blew Hydrogen to
V106. The sudden increase in pressure opened 66PC409C to flare #1 and flare #2. This overwhelmed the flare vapor recovery
systems which breached through the water seal drum causing
excess H2S over the 3 hour limit. Operations investigated the
instrument and rammed the leads to clear the false high level
reading. The H2S soon fell below exceedance levels. The refinery does not have a history of emissions associated with this cause.
10 10
H2S/TRS
The Coker B valve opened to relief due to a missed permissive
signal. Which put H2S in to the relief system. We had a new UO
on the console that was not yet aware of the permissive that was needed to avoid this scenario. Chevron provided additional
coaching and training to the new unit operator on how to avoid
this scenario in the future. The refinery does not have a history of emissions associated with this cause.
3 3
H2S/TRS
While unloading a railcar in LPG. The blend pump cavitated. During this cavitation, operations were also venting a blend
pump. The combination of the blend pump and the cavitating
railcar pump overwhelmed and briefly breached the seals at
flare #2. This caused an H2S 3 hour limit exceedance. Operations
reacted quickly to sweep the flare with sweet gas and eliminate the exceedance. The refinery does not have a history of
exceedances associated with this cause.
2 2
H2S/TRS
Heavy rain caused the instrumentation on the VGO compressor
to read a false high signal. This false high caused the SIS systems
to open a control valve causing excess H2S to vent to relief, breaching the seal. Once the UO noticed the false level, he
switched to a redundant level for control. This switching to
another instrument not effected by the rain allowed the control valve to operate as designed. This eliminated the excess H2S at
flare #2. The refinery does not have a history of emissions
associated with this cause.
9 9
H2S/TRS
There was simultaneous work going on at the FCC and jet plant.
The automatic dump valve at the FCC opened on V32107. Around the same time the clay treater at the jet plant was being steamed
to relief. This caused excess light hydrocarbon to vaporize from
the steam and flow to spike at the flare. During the increase in flow, the flare#2 water seal was breached resulting in an
exceedance in H2S. Operations saw the alarm and safely used
sweet gas to sweep the flare eliminating the exceedance. The
refinery does not have a history of emissions associated with this
cause.
8 8
H2S/TRS
Maintenance was working on level instrumentation on V66104.
SIS instruments were placed in bypass, but the controller was not placed in manual. When 66LI316 instruments saw a high level,
the dump valve opened sending pressure to relief. During that
time, we exceeded our 3 hour H2S limit. Once this was noted, operations worked to quickly and safely place 66LC316 in manual
and then closed position. This eliminated excess H2S from
breaching the water seal at flare#2. The refinery does not have a history of emissions associated with this cause.
9 9
H2S/TRS
Electricity supply to the refinery was temporarily interrupted
causing several unit shut downs and also resulted in the loss of
third party H2 supply for an extended period of time. This resulted in a Flare #2 3-hour H2S limit exceedance. Refinery
personnel followed procedures to begin starting equipment that
had shut down from the loss of power. Units were brought to a safe position and feed introduced. The refinery does not have a
history of emissions associated with this cause.
14 14
Chevron Refinery EER 3Q2024
H2S/TRS Grand Total 25 2 31 58
CO *
CO Type Code 440(CO) - 6000 (All)
CO *
CO Count of Magnitude of Emissions Column Labels
CO Row Labels Grand TotalCOGrand Total
VOC/THC *VOC/THC Type Code 460 (VOC/THC) - 6000 (All)VOC/THC *VOC/THC Count of Magnitude of Emissions Column Labels
VOC/THC Row Labels Grand Total
VOC/THC Grand Total
O2 *
O2 Type Code 470(TRS as O2) - 6000 (All)
O2 *
O2 Count of Magnitude of Emissions Column Labels
O2 Row Labels Grand Total
O2 Grand Total
Chevron Refinery EER 3Q2024
Type Code 500
Before February 28, 2005 (Boiler Operating Days w/o 18 Hours of
Data) After February 28, 2005 (90% Operating Hours For each 30 BOD)
- 500
(All)
*
Count of Channel Column Labels
Row Labels Grand Total
Grand Total
*
Type Code 510
(F-factor, Equations & Conversion Factors) - 500 (All)
Count of F-factor Column Labels
Row Labels Grand Total
Grand Total
*
Type Code 520
(Minimum Data Not
Obtained <22/30 BODs) - 500
(All)
Count of Channel Column Labels
Row Labels Grand Total
Grand Total
*
Type Code 530
(Excess Emissions During Emergency Conditions) - 500 (All)
Count of Date Column Labels
Row Labels Grand Total
Grand Total
*
Type Code 540
(Fuel Pre-treatment Credit SO2) - 500 (All)
Count of Date Column Labels
Row Labels Grand Total
Grand Total
*
TypeCode 550
(Changes in Operation in Control Equipment When CEM Data Not
Available) - 500
(All)
Column Labels
Row Labels Grand Total
Grand Total