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HomeMy WebLinkAboutDAQ-2025-000878 1 DAQC-163-25 Site ID 10237 (B5) MEMORANDUM TO: FILE – HUNTER POWER PLANT THROUGH: Harold Burge, Major Source Compliance Section Manager FROM: Rob Leishman, Environmental Scientist DATE: February 10, 2025 SUBJECT: Hunter Power Plant (Hunter), Major, NSPS, Emery County, FRS # UT0000004901500101 INSPECTION TYPE: State Electronic Data Report (SEDR) Review REVIEW DATE: February 10, 2025 SOURCE LOCATION: Castle Dale/Emery County SOURCE CONTACT: Terry Guthrie – 435-748-6059 Jay Howard – 435-748-6519 APPLICABLE REGULATIONS: Title V Operating Permit Permit Number: 1500101004 Date of Permit: September 4, 2020 Date of Last Revision: November 19, 2021 SOURCE REVIEW EVALUATION: SOURCE INSPECTION 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 Hunter’s relative accuracy performance specification test review memorandum. 1 8 2 2 SEDR Review Fourth 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 1 2207 SO2 100% 10/22/24 10/22/24 1 SO2 0.00 1.2 lb/MMBtu - 3 hr ra 1 2207 NOx 100% 10/22/24 10/22/24 1 SO2 0.00 0.12 lb/MMBtu - 30 DRA 1 2207 CO2 100% 10/22/24 10/22/24 1 SO2 0.00 0.2 lb/MMBtu - 30 DRA 1 2207 Opacity 99% 1 NOx 0.00 0.7 lb/MMBtu - 3 hr ra 1 2207 CO 100% 10/22/24 10/22/24 1 NOx 0.00 0.26 lb/MMBtu - 30 DRA 2 2179 SO2 100% 10/22/24 10/16/24 1 Opacity 0.00 20 Percent - 6 min 2 2179 NOx 100% 10/22/24 10/16/24 1 CO 0.00 3990 lb/hr - 8 hr Block Ave 2 2179 CO2 100% 10/22/24 10/16/24 1 CO 0.00 0.34 lb/MMBtu - 30 DRA 2 2179 Opacity 99% 2 SO2 0.00 1.2 lb/MMBtu - 3 hr ra 2 2179 CO 100% 10/22/24 10/16/24 2 SO2 0.00 0.12 lb/MMBtu - 30 DRA 3 2175 SO2 100% 10/23/24 11/20/24 2 SO2 0.00 0.2 lb/MMBtu - 30 DRA 3 2175 NOx 99% 10/23/24 11/20/24 2 NOx 0.00 0.7 lb/MMBtu - 3 hr ra 3 2175 CO2 100% 10/23/24 11/20/24 2 NOx 0.00 0.26 lb/MMBtu - 30 DRA 3 2175 Opacity 99% 2 Opacity 0.00 20 Percent - 6 min 3 2175 CO 97% 10/23/24 11/20/24 2 CO 0.00 3990 lb/hr - 8 hr Block Ave 2 CO 0.00 0.34 lb/MMBtu - 30 DRA 3 SO2 0.00 0.12 lb/MMBtu - 30 DRA 3 Fourth 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 3 SO2 0.00 0.2 lb/MMBtu - 30 DRA 3 NOx 0.00 0.34 lb/MMBtu - 30 DRA 3 Opacity 0.00 20 Percent - 6 min 3 CO 0.00 0.2 lb/MMBtu - 30 DRA 3 CO 0.00 2406 lb/hr - 8 hr Block Ave Summary of SO2 Emission Reduction Percent Removal Required % Reduction Point Source Channel Min Max Days in violation Status 1 SO2 94% 95% 80% 0 In compliance 2 SO2 94% 95% 80% 0 In compliance 3 SO2 94% 94% 90% 0 In compliance Excess Emission Report - Hourly Summary Point Source Channel Startup & Shutdown Control Equipment Problems Process Problems Other Known Causes Unknown Causes Emission Limit 1 SO2 0 0 0 0 0 1.2 lb/MMBtu - 3 hr ra 1 SO2 0 0 0 0 0 0.12 lb/MMBtu - 30 DRA 1 SO2 0 0 0 0 0 0.2 lb/MMBtu - 30 DRA 1 NOx 0 0 0 0 0 0.7 lb/MMBtu - 3 hr ra 1 NOx 0 0 0 0 0 0.26 lb/MMBtu - 30 DRA 1 Opacity 0 0 0 0 0 20 Percent - 6 min 1 CO 0 0 0 0 0 3990 lb/hr - 8 hr Block Ave 1 CO 0 0 0 0 0 0.34 lb/MMBtu - 30 DRA 2 SO2 0 0 0 0 0 1.2 lb/MMBtu - 3 hr ra 2 SO2 0 0 0 0 0 0.12 lb/MMBtu - 30 DRA 2 SO2 0 0 0 0 0 0.2 lb/MMBtu - 30 DRA 2 NOx 0 0 0 0 0 0.7 lb/MMBtu - 3 hr ra 2 NOx 0 0 0 0 0 0.26 lb/MMBtu - 30 DRA 2 Opacity 0 0 0 0 0 20 Percent - 6 min 4 Excess Emission Report - Hourly Summary Point Source Channel Startup & Shutdown Control Equipment Problems Process Problems Other Known Causes Unknown Causes Emission Limit 2 CO 0 0 0 0 0 3990 lb/hr - 8 hr Block Ave 2 CO 0 0 0 0 0 0.34 lb/MMBtu - 30 DRA 3 SO2 0 0 0 0 0 0.12 lb/MMBtu - 30 DRA 3 SO2 0 0 0 0 0 0.2 lb/MMBtu - 30 DRA 3 NOx 0 0 0 0 0 0.34 lb/MMBtu - 30 DRA 3 Opacity 0 0 0 0 0 20 Percent - 6 min 3 CO 0 0 0 0 0 0.2 lb/MMBtu - 30 DRA 3 CO 0 0 0 0 0 2406 lb/hr - 8 hr Block Ave CMS Performance Summary - Hourly Summary Point Source Channel Monitor Malfunction Non-monitor Malfunction QA Calibrations Other Known Causes Unknown Causes 1 SO2 0 0 0 2 0 1 NOx 0 0 0 2 0 1 CO2 0 0 0 2 0 1 Opacity 1 0 9 4 0 1 CO 0 0 0 2 0 2 SO2 3 0 3 0 0 2 NOx 3 0 2 1 0 2 CO2 3 0 2 1 0 2 Opacity 0 0 10 1 0 2 CO 3 0 2 1 0 3 SO2 0 0 0 8 0 3 NOx 23 0 0 2 0 3 CO2 0 0 0 8 0 3 Opacity 0 0 11 5 0 3 CO 56 0 0 6 0 5 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 Unit 1 - 1A S13263 6/28/24 17.40 1.00 17.4 Low 1 Unit 1 - 1A S13268 6/28/24 26.60 1.00 26.6 Mid 1 Unit 1 - 1A S13249 6/28/24 46.90 1.00 46.9 High 1 Unit 1 - 1B S13263 6/28/24 17.40 1.00 17.4 Low 1 Unit 1 - 1B S13268 6/28/24 26.60 1.00 26.6 Mid 1 Unit 1 - 1B S13249 6/28/24 46.90 1.00 46.9 High 1 Unit 2 - 2A S13263 6/28/24 17.40 1.00 17.4 Low 1 Unit 2 - 2A S13268 6/28/24 26.60 1.00 26.6 Mid 1 Unit 2 - 2A S13249 6/28/24 46.90 1.00 46.9 High 1 Unit 2 - 2B S13263 6/28/24 17.40 1.00 17.4 Low 1 Unit 2 - 2B S13268 6/28/24 26.60 1.00 26.6 Mid 1 Unit 2 - 2B S13249 6/28/24 46.90 1.00 46.9 High 1 Unit 3 - 3 S13263 6/28/24 17.40 1.00 17.4 Low 1 Unit 3 - 3 S13268 6/28/24 26.60 1.00 26.6 Mid 1 Unit 3 - 3 S13249 6/28/24 46.90 1.00 46.9 High 1 Unit 3 - 3 S13263 6/28/24 17.40 1.00 17.4 Low 1 Unit 3 - 3 S13268 6/28/24 26.60 1.00 26.6 Mid 1 Unit 3 - 3 S13249 6/28/24 46.90 1.00 46.9 High 1 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 Unit 1 1A 10/1/24 17 Unit 1 1A 10/1/24 26 -0.640 0.007 Unit 1 1A 10/1/24 48 0.700 0.015 Unit 1 1B 10/1/24 17 0.020 0.001 Unit 1 1B 10/1/24 26 -0.630 0.007 Unit 1 1B 10/1/24 48 0.680 0.007 Unit 2 2A 10/7/24 18 0.180 0.005 Unit 2 2A 10/7/24 26 -0.490 0.007 Unit 2 2A 10/7/24 47 0.380 0.007 Unit 2 2B 10/7/24 18 0.200 0.002 Unit 2 2B 10/7/24 26 -0.320 0.003 Unit 2 2B 10/7/24 48 0.880 0.009 6 Unit 3 3 10/8/24 17 -0.120 0.002 Unit 3 3 10/8/24 26 -0.470 0.010 Unit 3 3 10/8/24 47 0.370 0.014 Unit 3 3 10/8/24 17 -0.060 0.001 Unit 3 3 10/8/24 26 -0.700 0.008 Unit 3 3 10/8/24 48 0.910 0.010 Type Code 282 (Annual Zero Alignment Audit) Procedure 3 Point Source Location Audit Date Alternative Zero Alignment (Yes or No) COM Clear Condition Zero Response (CCZR) COM Simulated Zero Response (CSZR) Zero Alignment Error Difference (CCZR)- (CSZR) Adjustment to COM Simulated Zero Response (CSZR) (Yes or No) 1 1A 2/12/24 no 0.25 0.03 0 yes 1 1B 2/12/24 no -2.35 -0.03 -2 yes 2 2A 2/6/24 no 100.00 -0.02 100 yes 2 2B 2/6/24 no 0.83 -0.15 1 yes 3 3A 3/6/24 no 0.49 0.04 0 yes 3 3B 3/5/24 no 0.35 -0.07 0 yes Summary of SO2 Emission Reduction Percent Removal Required Percent Reduction Point Source Channel Min Max Days in violation 1 SO2 94% 95% 80% 0 2 SO2 94% 95% 80% 0 3 SO2 94% 94% 90% 0 Pollutant Concentration Exceeded Span of CEM Monitor Outage During Point Source Operation Alternate Sampling CEM Modifications 0 Hours 177 Hours 0 Hours 0 Events SOURCE INSPECTION SUMMARY EVALUATION: Hunter maintains its CEMS as required in R307-170 and 40 CFR 60.13. 7 CURRENT RECOMMENDATIONS: All deviations appear to be a result of breakdown or process related problems that do not warrant issuing a violation. Periods of excess emissions that were recorded by the CMS in service on each point source during this reporting period are summarized in the SEDR and described in Pivot Table 400 “Excess Emissions Review.” Hunter was in compliance during this reporting period. No further enforcement actions should be taken. Hunter’s NSPS monitoring system meets the performance standards of 40 CFR 60, Appendix B Performance Specifications. Hunter’s acid rain monitoring system meets the performance standards of 40 CFR 75 Acid Rain 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 Pacificorp Hunter EER 4Q2024 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 Laren Huntsman 01500101 435-748-6519 Jay Howard 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 Quarter 1 110 4 2024 2207.97 1 110 4 2024 2179.85 1 110 4 2024 2175.27 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 CO Thermo Scientific 48iQ 12111711815 0 2000 7/12/2021 Stack 1 200 CO2 Thermo Scientific 410iQ 12111711827 0 20 7/12/2021 Stack 1 200 NOx Thermo Scientific 42iQ 12111711830 0 400 7/12/2021 Stack 1 200 OpacityA Teledyne Lighthawk 560 ES 5603357 0 100 9/17/2021 1-1 BH 1 200 OpacityB Teledyne Lighthawk 560 ES 5603356 0 100 9/17/2021 1-2 BH 1 200 SO2 Thermo Scientific 43iQ 12111711833 60 600 7/12/2021 Stack 1 200 CO Thermo Scientific 48iQ 12111711816 0 2000 7/13/2021 Stack 1 200 CO2 Thermo Scientific 410iQ 12111711828 0 20 7/13/2021 Stack 1 200 NOx Thermo Scientific 42iQ 12111711831 0 400 7/13/2021 Stack 1 200 OpacityA Teledyne Lighthawk 560 ES 5603359 0 100 9/16/2021 2-1 BH 1 200 OpacityB Teledyne Lighthawk 560 ES 5603358 0 100 9/16/2021 2-2 BH 1 200 SO2 Thermo Scientific 43iQ 12111711834 60 600 7/12/2022 Stack 1 200 CO Thermo Scientific 48iQ 12111711817 0 2000 7/13/2021 Stack 1 200 CO2 Thermo Scientific 410iQ 12111711829 0 20 7/13/2021 Stack 1 200 NOx Thermo Scientific 42iQ 12111711832 0 400 7/13/2021 Stack 1 200 OpacityA Teledyne Lighthawk 560 ES 5603360 0 100 9/15/2021 3-1 BH Duct 1 200 OpacityB Teledyne Lighthawk 560 ES 5603361 0 100 9/15/2021 3-2 BH Duct 1 200 SO2 Thermo Scientific 43iQ 12111711835 60 600 7/13/2021 Stack 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 Period 1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 1.2 lb/MMBtu 3 hr ra 1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 0.12 lb/MMBtu 30 DRA 1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 0.2 lb/MMBtu 30 DRA 1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 0.7 lb/MMBtu 3 hr ra 1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 0.26 lb/MMBtu 30 DRA 1 TRUE 310 Opacity 0 0.00% 0 0 0 0 0 20 Percent 6 min 1 TRUE 310 CO 0 0.00% 0 0 0 0 0 3990 lb/hr 8 hr Block Ave 1 TRUE 310 CO 0 0.00% 0 0 0 0 0 0.34 lb/MMBtu 30 DRA 1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 1.2 lb/MMBtu 3 hr ra 1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 0.12 lb/MMBtu 30 DRA 1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 0.2 lb/MMBtu 30 DRA 1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 0.7 lb/MMBtu 3 hr ra 1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 0.26 lb/MMBtu 30 DRA 1 TRUE 310 Opacity 0 0.00% 0 0 0 0 0 20 Percent 6 min 1 TRUE 310 CO 0 0.00% 0 0 0 0 0 3990 lb/hr 8 hr Block Ave 1 TRUE 310 CO 0 0.00% 0 0 0 0 0 0.34 lb/MMBtu 30 DRA 1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 0.12 lb/MMBtu 30 DRA 1 TRUE 310 SO2 0 0.00% 0 0 0 0 0 0.2 lb/MMBtu 30 DRA 1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 0.34 lb/MMBtu 30 DRA 1 TRUE 310 Opacity 0 0.00% 0 0 0 0 0 20 Percent 6 min 1 TRUE 310 CO 0 0.00% 0 0 0 0 0 0.2 lb/MMBtu 30 DRA 1 TRUE 310 CO 0 0.00% 0 0 0 0 0 2406 lb/hr 8 hr Block Ave 1 310 0 0 0 0 0 0 0 0 0 Point Source 0 3 1 2 3 0 3 1 1 1 2 2 2 3 3 3 3 Pacificorp Hunter 0 1 1 1 1 1 1 2 2 2 2 2 1 1 1 2 2 1 1 2 2 2 2 3 3 3 3 3 3 0 Pacificorp Hunter EER 4Q2024 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 SO2 2207.97 0.09% 1.98 0 0 0 1.98 0 1 TRUE 300 NOx 2207.97 0.09% 1.98 0 0 0 1.98 0 1 TRUE 300 CO2 2207.97 0.09% 1.97 0 0 0 1.97 0 1 TRUE 300 Opacity 2207.97 0.67% 14.79 0.83 0.17 9.47 4.32 0 1 TRUE 300 CO 2207.97 0.09% 1.98 0 0 0 1.98 0 1 TRUE 300 SO2 2179.85 0.27% 5.9 3 0 2.9 0 0 1 TRUE 300 NOx 2179.85 0.28% 6 3 0 2 1 0 1 TRUE 300 CO2 2179.85 0.28% 6 3 0 2 1 0 1 TRUE 300 Opacity 2179.85 0.52% 11.4 0.2 0.1 9.7 1.4 0 1 TRUE 300 CO 2179.85 0.28% 6 3 0 2 1 0 1 TRUE 300 SO2 2175.27 0.36% 7.9 0 0 0 7.9 0 1 TRUE 300 NOx 2175.27 1.15% 25 23 0 0 2 0 1 TRUE 300 CO2 2175.27 0.36% 7.9 0 0 0 7.9 0 1 TRUE 300 Opacity 2175.27 0.75% 16.4 0.2 0.2 11 5 0 1 TRUE 300 CO 2175.27 2.85% 62 56 0 0 6 0 1 300 0 0 0 0 0 0 1 Type Code 250 (Performance Specification RATA 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 64 Days 250 CO 10/22/24 08/19/24 2.1 lb/mmBtu 0.1 0.1 5.00% pass 1 64 Days 250 CO 10/22/24 08/19/24 2.1 lb/hr 146.5 118.3 0.90% pass 1 64 Days 250 CO2 10/22/24 08/19/24 2.1 Percent 8.7 8.7 1.20% pass 1 64 Days 250 NOx 10/22/24 08/19/24 2.1 #/MMBtu 0.2 0.2 2.20% pass 1 64 Days 250 SO2 10/22/24 08/19/24 2.1 ppm 22.5 22.8 1.60% pass 1 167 Days 250 CO 10/16/24 05/02/24 5.5 lb/mmBtu 0.03 0.02 3.90% pass 1 167 Days 250 CO 10/16/24 05/02/24 5.5 lb/hr 55 31 0.60% pass 1 167 Days 250 CO2 10/16/24 05/02/24 5.5 Percent 8.9 8.9 0.60% pass 1 167 Days 250 NOx 10/16/24 05/02/24 5.5 #/MMBtu 0.1 0.1 2.30% pass 1 167 Days 250 SO2 10/16/24 05/02/24 5.5 ppm 19.5 19.3 1.60% pass 1 392 Days 250 CO 11/20/24 10/25/23 12.9 lb/mmBtu 0.023 0.01 6.80% pass 1 392 Days 250 CO 11/20/24 10/25/23 12.9 lb/hr 42.1 18.9 1.00% pass 1 392 Days 250 CO2 11/20/24 10/25/23 12.9 Percent 8.8 8.6 2.70% pass 1 392 Days 250 NOx 11/20/24 10/25/23 12.9 #/MMBtu 0.2 0.2 3.20% pass 1 392 Days 250 SO2 11/20/24 10/25/23 12.9 ppm 25.3 23.7 7.20% pass 1 0 Days 250 0 01/00/00 01/00/00 0 0 0 0 0.00% 0 Point Source Point Source 0 2 2 2 2 3 1 1 2 2 2 1 1 1 3 2 2 3 3 3 3 0 1 1 1 1 2 1 3 3 3 3 Pacificorp Hunter EER 4Q2024 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 CO 10/22/24 low CC437416 09/23/32 p1 ppm 492.6 501 -1.70% PASS 0 1 Valid Cal. Gas 260 CO 10/22/24 mid DT0027442 12/20/27 p1 ppm 1145.2 1118 2.40% PASS 0 1 Valid Cal. Gas 260 CO 10/22/24 low CC280314 09/23/32 p1 ppm 506.2 501.3 1.00% PASS 0 1 Valid Cal. Gas 260 CO 10/22/24 mid DT0011509 12/20/27 p1 ppm 1116.1 1117 -0.10% PASS 0 1 Valid Cal. Gas 260 CO 10/23/24 low SA7143 08/23/27 p1 ppm 537 520 3.30% PASS 0 1 Valid Cal. Gas 260 CO 10/23/24 mid AAL073426 06/28/28 p1 ppm 1105.3 1095 0.90% PASS 0 1 260 0 01/00/00 0 0 01/00/00 0 0 0 0 0.00% 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 of Measurement CEM Value Cylinder Value Precision %Pass/ Fail Range - High or Low 1 Valid Cal. Gas 270 CO2 10/22/24 low CC437416 09/23/32 P1 percent 4.87 5 2.70% PASS 0 1 Valid Cal. Gas 270 CO2 10/20/24 mid EB0105186 09/03/32 P1 percent 10.9 10.9 0.00% PASS 0 1 Valid Cal. Gas 270 CO2 10/22/24 high EB0086622 10/14/32 P1 percent 18.17 18 0.90% PASS 0 1 Valid Cal. Gas 270 NOx 10/22/24 low CC437416 09/23/32 P1 ppm 50.53 50.4 0% PASS 0 1 Valid Cal. Gas 270 NOx 10/22/24 mid EB0105186 09/03/32 P1 ppm 109.27 110.9 2% PASS 0 1 Valid Cal. Gas 270 NOx 10/22/24 high EB0086622 10/14/32 P1 ppm 179.5 181.8 1% PASS 0 1 Valid Cal. Gas 270 SO2 10/22/24 low CC437416 09/23/32 P1 ppm 149.3 154.1 3.20% PASS 0 1 Valid Cal. Gas 270 SO2 10/22/24 mid EB0105186 09/23/32 P1 ppm 329.43 328.1 0.40% PASS 0 1 Valid Cal. Gas 270 SO2 10/22/24 high EB0086622 10/14/32 P1 ppm 526.07 536 1.90% PASS 0 1 Valid Cal. Gas 270 CO2 10/22/24 low CC280314 09/23/32 P1 percent 4.87 5 2.70% PASS 0 1 Valid Cal. Gas 270 CO2 10/22/24 mid CC480573 09/03/32 P1 percent 10.8 10.9 0.90% PASS 0 1 Valid Cal. Gas 270 CO2 10/22/24 high EB0067529 10/07/32 P1 percent 17.9 18 0.60% PASS 0 1 Valid Cal. Gas 270 NOx 10/22/24 low CC280314 09/23/32 P1 ppm 49.53 50.5 1.90% PASS 0 1 Valid Cal. Gas 270 NOx 10/22/24 mid CC480573 09/03/32 P1 ppm 107.17 110.1 2.70% PASS 0 1 Valid Cal. Gas 270 NOx 10/22/24 high EB0067529 10/07/32 P1 ppm 177.2 183.2 3.30% PASS 0 1 Valid Cal. Gas 270 SO2 10/22/24 low CC280314 09/23/32 P1 ppm 155.9 149.3 4% PASS 0 1 Valid Cal. Gas 270 SO2 10/22/24 mid CC480573 09/03/32 P1 ppm 337.97 334.2 1% PASS 0 1 Valid Cal. Gas 270 SO2 10/22/24 high EB0067529 10/07/32 P1 ppm 523.63 531.2 1% PASS 0 1 Valid Cal. Gas 270 CO2 10/23/24 low SA7143 08/23/27 P1 percent 5 4.9 2.00% PASS 0 1 Valid Cal. Gas 270 CO2 10/23/24 mid CC498041 07/01/32 P1 percent 11.03 11 0.30% PASS 0 1 Valid Cal. Gas 270 CO2 10/23/24 high CC155742 08/26/27 P1 percent 17.7 17.6 0.60% PASS 0 1 Valid Cal. Gas 270 NOx 10/23/24 low SA7143 08/23/27 P1 ppm 110.57 110 0.50% PASS 0 1 Valid Cal. Gas 270 NOx 10/23/24 mid CC498041 07/01/32 P1 ppm 216.07 215.3 0.40% PASS 0 1 Valid Cal. Gas 270 NOx 10/23/24 high CC155742 08/26/27 P1 ppm 350.97 358 2.00% PASS 0 1 Valid Cal. Gas 270 SO2 10/23/24 low SA7143 08/23/27 P1 ppm 151.93 146.2 3.90% PASS 0 1 Valid Cal. Gas 270 SO2 10/23/24 mid CC498041 07/01/32 P1 ppm 334.43 330 1.30% PASS 0 1 Valid Cal. Gas 270 SO2 10/23/24 high CC155742 08/26/27 P1 ppm 535.73 539 0.60% PASS 0 1 270 0 01/00/00 0 0 01/00/00 0 0 0 0 0.00% 0 0 1 Type Code 210 (Pollutant Concentration Exceeded Span of CEM) Type Code Channel Start Date Start Time End Date End Time Hours 1 0 0 0 1/0/00 0:00 1/0/00 0:00 1 1 None Reported 1 0 TC 220 Hours 176.63 TC 220 Hours 0.00 TC 230 Hours 0.00 Events 0.00 Hours 0.00 Events 0.00 0.00 1 177.20 TC 300 Hours 0.57 FALSE None Reported None Reported Yes Yes None Reported None Reported 2 2 2 3 3 3 3 3 3 3 0 Point Source Point Source Point Source Yes 1 1 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) Type Code 450 (Data Excluded) Type Code 210 (Pollutant Concentration Exceeded Span of CEM) Type Code 220 (Monitor Outage During Point Source Operation) Type Code 230 (Manual Sample - Alternate Sampling During Monitor Outage) Type Code 240 (CEM Modifications) Type Code 530 (Excess Emissions During Emergency Conditions) 2 2 3 3 0 2 3 3 1 1 1 1 2 1 1 1 1 1 2 2 2 2 0 Pacificorp Hunter EER 4Q2024 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 1 CO 10/22/24 08/19/24 2.1 lb/mmBtu 0.1 0.10 5.00% pass 1 CO 10/22/24 08/19/24 2.1 lb/hr 146.5 118.30 0.90% pass 1 CO2 10/22/24 08/19/24 2.1 Percent 8.7 8.70 1.20% pass 1 NOx 10/22/24 08/19/24 2.1 #/MMBtu 0.2 0.20 2.20% pass 1 SO2 10/22/24 08/19/24 2.1 ppm 22.5 22.80 1.60% pass 2 CO 10/16/24 05/02/24 5.5 lb/mmBtu 0.03 0.02 3.90% pass 2 CO 10/16/24 05/02/24 5.5 lb/hr 55 31.00 0.60% pass 2 CO2 10/16/24 05/02/24 5.5 Percent 8.9 8.90 0.60% pass 2 NOx 10/16/24 05/02/24 5.5 #/MMBtu 0.1 0.10 2.30% pass 2 SO2 10/16/24 05/02/24 5.5 ppm 19.5 19.30 1.60% pass 3 CO 11/20/24 10/25/23 12.9 lb/mmBtu 0.023 0.01 6.80% pass 3 CO 11/20/24 10/25/23 12.9 lb/hr 42.1 18.90 1.00% pass 3 CO2 11/20/24 10/25/23 12.9 Percent 8.8 8.60 2.70% pass 3 NOx 11/20/24 10/25/23 12.9 #/MMBtu 0.2 0.20 3.20% pass 3 SO2 11/20/24 10/25/23 12.9 ppm 25.3 23.70 7.20% pass * NSPS CGA Fourth 2024 Audit Gas Ranges Audit Gas Ranges AP1 Low AP2 Low AP1 High AP2 High 1 CO 10/22/24 2000 501 400 to 600 1 CO 10/22/24 2000 1118 1000 to 1200 2 CO 10/22/24 2000 501.3 400 to 600 2 CO 10/22/24 2000 1117 1000 to 1200 3 CO 10/23/24 2000 520 400 to 600 3 CO 10/23/24 2000 1095 1000 to 1200 * Acid Rain Audit Linearity Fourth 2024 Low Span Gas Ranges High Span Gas Ranges Low Mid High Low Mid High 1 CO2 10/22/24 20 5 4 to 6 1 CO2 10/20/24 20 10.9 10 to 12 1 CO2 10/22/24 20 18 16 to 20 1 NOx 10/22/24 400 50.4 80 to 120 1 NOx 10/22/24 400 110.9 200 to 240 1 NOx 10/22/24 400 181.8 320 to 400 1 SO2 10/22/24 600 154.1 120 to 180 1 SO2 10/22/24 600 328.1 300 to 360 1 SO2 10/22/24 600 536 480 to 600 2 CO2 10/22/24 20 5 4 to 6 2 CO2 10/22/24 20 10.9 10 to 12 2 CO2 10/22/24 20 18 16 to 20 2 NOx 10/22/24 400 50.5 80 to 120 2 NOx 10/22/24 400 110.1 200 to 240 2 NOx 10/22/24 400 183.2 320 to 400 2 SO2 10/22/24 600 149.3 120 to 180 2 SO2 10/22/24 600 334.2 300 to 360 2 SO2 10/22/24 600 531.2 480 to 600 3 CO2 10/23/24 20 4.9 4 to 6 3 CO2 10/23/24 20 11 10 to 12 3 CO2 10/23/24 20 17.6 16 to 20 3 NOx 10/23/24 400 110 80 to 120 3 NOx 10/23/24 400 215.3 200 to 240 3 NOx 10/23/24 400 358 320 to 400 3 SO2 10/23/24 600 146.2 120 to 180 3 SO2 10/23/24 600 330 300 to 360 3 SO2 10/23/24 600 539 480 to 600 * Audit Gas Used Point Source Channel Audit Date Low Span Point Source Channel Audit Date Low Span Audit Gas Used High Span Audit Gas Used High SpanAudit Gas Used Pacificorp Hunter EER 4Q2024 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 Unit 1 1A S13263 6/28/24 17 1 17.4 Low 1 Unit 1 1A S13268 6/28/24 27 1 26.6 Mid 1 Unit 1 1A S13249 6/28/24 47 1 46.9 High 1 Unit 1 1B S13263 6/28/24 17.4 1 17.4 Low 1 Unit 1 1B S13268 6/28/24 26.6 1 26.6 Mid 1 Unit 1 1B S13249 6/28/24 46.9 1 46.9 High 1 Unit 2 2A S13263 6/28/24 17.4 1 17.4 Low 1 Unit 2 2A S13268 6/28/24 26.6 1 26.6 Mid 1 Unit 2 2A S13249 6/28/24 46.9 1 46.9 High 1 Unit 2 2B S13263 6/28/24 17.4 1 17.4 Low 1 Unit 2 2B S13268 6/28/24 26.6 1 26.6 Mid 1 Unit 2 2B S13249 6/28/24 46.9 1 46.9 High 1 Unit 3 3 S13263 6/28/24 17.4 1 17.4 Low 1 Unit 3 3 S13268 6/28/24 26.6 1 26.6 Mid 1 Unit 3 3 S13249 6/28/24 46.9 1 46.9 High 1 Unit 3 3 S13263 6/28/24 17.4 1 17.4 Low 1 Unit 3 3 S13268 6/28/24 26.6 1 26.6 Mid 1 Unit 3 3 S13249 6/28/24 46.9 1 46.9 High 1 * Opacity Monitor Response (Average of 5) Low Range Mid Range High Range Unit 1 1A 10/1/24 17 0.000 0.000 0.000 0.000 Unit 1 1A 10/1/24 26 -0.640 0.045 0.056 0.007 Unit 1 1A 10/1/24 48 0.700 0.626 0.777 0.015 Unit 1 1B 10/1/24 17 0.020 0.045 0.056 0.001 Unit 1 1B 10/1/24 26 -0.630 0.022 0.028 0.007 Unit 1 1B 10/1/24 48 0.680 0.000 0.000 0.007 Unit 2 2A 10/7/24 18 0.180 0.249 0.309 0.005 Unit 2 2A 10/7/24 26 -0.490 0.157 0.194 0.007 Unit 2 2A 10/7/24 47 0.380 0.235 0.291 0.007 Unit 2 2B 10/7/24 18 0.200 0.000 0.000 0.002 Unit 2 2B 10/7/24 26 -0.320 0.000 0.000 0.003 Unit 2 2B 10/7/24 48 0.880 0.000 0.000 0.009 Unit 3 3 10/8/24 17 -0.120 0.084 0.104 0.002 Unit 3 3 10/8/24 26 -0.470 0.450 0.559 0.010 Unit 3 3 10/8/24 47 0.370 0.818 1.016 0.014 Unit 3 3 10/8/24 17 -0.060 0.055 0.068 0.001 Unit 3 3 10/8/24 26 -0.700 0.045 0.056 0.008 Unit 3 3 10/8/24 48 0.910 0.045 0.056 0.010 * Point Source Location Audit Date Alternitive Zero Alignment (Yes or No) COM Clear Condition Zero Response (CCZR) COM Simulated Zero Response (CSZR) Zero Alignment Error Difference (CCZR)-(CSZR) Adjustment to COM Simulated Zero Response (CSZR) (Yes or No) 1 1A 2/12/24 no 0.250 0.030 0.220 yes 1 1B 2/12/24 no -2.350 -0.030 -2.320 yes 2 2A 2/6/24 no 100.000 -0.020 100.020 yes 2 2B 2/6/24 no 0.830 -0.150 0.980 yes 3 3A 3/6/24 no 0.490 0.040 0.450 yes 3 3B 3/5/24 no 0.350 -0.070 0.420 yes Type Code 282 (Procedure 3 - Annual Zero Alignment Audit) Point Source Location Audit Date Mean Difference Standard Deviation Confidence Coefficient Calibration Error (≤ 3%) Type Code 281 (Procedure 3 - COMS Filter Audit Calibration Error) Pacificorp Hunter EER 4Q2024 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) Grand Total (blank)0 0 Grand Total 0 0 * 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 Pacificorp Hunter EER 4Q2024 Type Code 220 (Monitor Outage During Point Source Operation) - 600 (All) * Sum of Hours Column Labels Row Labels 723 722 724 721 Grand Total 1 Opacity The monitor was unavailable during the daily monitor calibration as required by 40 CFR parts 60 and 75.4.67 4.67 Quarterly filter audit performed followed by auto calibration.4.02 4.02 An instantaneous power loss to the remote unit caused the remote to initiate a startup sequence during which valid data was not available. 0.08 0.08 Following maintenance, a daily calibration reference gas cylinder was not valved in, resulting in a calibration fail out of control indication. The cylinder was valved in and a second calibration was initiated. 2.17 2.17 Trouble shooting the 8864. Reset the 8864 due to 24 hr averages being stuck in the DCS. The reset did not fix the issue due to 8864 not being the problem. The data was correct in stackvision. The last update from ESC altered some points that didn't allow DCS to read the data. 2.15 2.15 The sample system became plugged resulting in insufficient sample flow to the analyzers. The sample system was cleaned and the analyzer(s) were returned to service. 0.83 0.83 A loss of power to the stack and or UPS system resulted in a loss of valid data. Stack power and or UPS power was restored and the monitor was returned to service. 0.08 0.08 Opacity monitor purge air filters were changed, optical surfaces were inspected and cleaned and electrical connections checked. The monitor was then returned to service 0.78 0.78 CO2 Trouble shooting the 8864. Reset the 8864 due to 24 hr averages being stuck in the DCS. The reset did not fix the issue due to 8864 not being the problem. The data was correct in stackvision. The last update from ESC altered some points that didn't allow DCS to read the data. 1.97 1.97 CO Trouble shooting the 8864. Reset the 8864 due to 24 hr averages being stuck in the DCS. The reset did not fix the issue due to 8864 not being the problem. The data was correct in stackvision. The last update from ESC altered some points that didn't allow DCS to read the data. 1.98 1.98 NOx Trouble shooting the 8864. Reset the 8864 due to 24 hr averages being stuck in the DCS. The reset did not fix the issue due to 8864 not being the problem. The data was correct in stackvision. The last update from ESC altered some points that didn't allow DCS to read the data. 1.98 1.98 SO2 Trouble shooting the 8864. Reset the 8864 due to 24 hr averages being stuck in the DCS. The reset did not fix the issue due to 8864 not being the problem. The data was correct in stackvision. The last update from ESC altered some points that didn't allow DCS to read the data. 1.98 1.98 2 Opacity The monitor was unavailable during the daily monitor calibration as required by 40 CFR parts 60 and 75.6.25 6.25 Quarterly filter audit performed followed by auto calibration.2.72 2.72 Pacificorp Hunter EER 4Q2024 Sum of Hours Column Labels Row Labels 723 722 724 721 Grand Total An instantaneous power loss to the remote unit caused the remote to initiate a startup sequence during which valid data was not available. 0.08 0.08 Following maintenance, a daily calibration reference gas cylinder was not valved in, resulting in a calibration fail out of control indication. The cylinder was valved in and a second calibration was initiated. 1.00 1.00 The sample system became plugged resulting in insufficient sample flow to the analyzers. The sample system was cleaned and the analyzer(s) were returned to service. 0.25 0.25 Opacity monitor purge air filters were changed, optical surfaces were inspected and cleaned and electrical connections checked. The monitor was then returned to service 0.48 0.48 Invalid 6 minute due to process off time and/ or calibration during hour 0.43 0.43 A calibration drift test was performed on one or more analyzers in order to verify system accuracy.0.27 0.27 CO2 Quarterly linearity testing performed.0.98 0.98 A calibration drift test was performed on one or more analyzers in order to verify system accuracy.0.98 0.98 Purge air solenoid valve stuck open caused purge air to continue to flow into the sample system, resulting in invalid data. The solenoid valve was repaired or replaced. An auto calibration was initiated and the monitors returned to service. 2.95 2.95 Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 0.98 0.98 CO Quarterly linearity testing performed.0.98 0.98 A calibration drift test was performed on one or more analyzers in order to verify system accuracy.0.98 0.98 Purge air solenoid valve stuck open caused purge air to continue to flow into the sample system, resulting in invalid data. The solenoid valve was repaired or replaced. An auto calibration was initiated and the monitors returned to service. 2.95 2.95 Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 0.98 0.98 NOx Quarterly linearity testing performed.0.98 0.98 A calibration drift test was performed on one or more analyzers in order to verify system accuracy.0.98 0.98 Purge air solenoid valve stuck open caused purge air to continue to flow into the sample system, resulting in invalid data. The solenoid valve was repaired or replaced. An auto calibration was initiated and the monitors returned to service. 2.95 2.95 Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 0.98 0.98 SO2 Quarterly linearity testing performed.0.98 0.98 A calibration drift test was performed on one or more analyzers in order to verify system accuracy.1.97 1.97 Purge air solenoid valve stuck open caused purge air to continue to flow into the sample system, resulting in invalid data. The solenoid valve was repaired or replaced. An auto calibration was initiated and the monitors returned to service. 2.95 2.95 3 Opacity Pacificorp Hunter EER 4Q2024 Sum of Hours Column Labels Row Labels 723 722 724 721 Grand Total The monitor was unavailable during the daily monitor calibration as required by 40 CFR parts 60 and 75.7.85 7.85 Quarterly filter audit performed followed by auto calibration.2.95 2.95 An instantaneous power loss to the remote unit caused the remote to initiate a startup sequence during which valid data was not available. 0.08 0.08 A loss of power to the stack and or UPS system resulted in a loss of valid data. Stack power and or UPS power was restored and the monitor was returned to service. 0.08 0.08 Invalid 6 minute due to process off time and/ or calibration during hour 0.17 0.17 Opacity monitor retro reflector lenses were cleaned and inspected. No adjustments were made to the analyzer. Followed by an auto cal. 4.87 4.87 Opacity Monitor calibration arm failed causing the monitor to fail calibration. Causing data to be out of control. Hands free calibration completed and passed. 0.18 0.18 CO2 Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 7.92 7.92 CO Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 5.95 5.95 IR source on the analyzer failed. Source was replaced followed by an auto cal.27.98 27.98 The monitor failed its daily/startup calibration. The monitor was recalibrated and returned to service.27.98 27.98 NOx Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 1.97 1.97 The monitor failed calibration out of control. The circuit board, and or the UV source were replaced or adjusted. Adjust factors were reset. Monitor was calibrated and returned to service. 15.98 15.98 The NOx, CO wheel chopper motor failed. The motor was replaced and the monitor was returned to service.3.98 3.98 Analyzer was in fault do to a board. Power was cycled and the fault cleared. Initiated auto calibration 2.98 2.98 SO2 Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 7.92 7.92 Grand Total 38.83 0.42 45.40 91.98 176.63 Pacificorp Hunter EER 4Q2024 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 Labels SO2 Row Labels Grand Total SO2 Grand Total NOx d * NOx d Type Code 421 (Daily NOx Emissions) - 500 (All) NOx d * NOx d Count of Reason Code Column Labels NOx d Row Labels (blank)q Grand Total NOx d 3 NOx d #N/A 1 1 NOx d Grand Total 1 1 CO * CO Type Code 440 (CO) - 6000 (All) CO * CO Count of Magnitude of Emissions Column Labels CO Row Labels Grand Total CO Grand Total Dat Ex * Dat Ex Type Code 450 (Data Excluded) - 6000 (All) Dat Ex * Dat Ex Count of Channel Column Labels Dat Ex Row Labels 724 721 Grand Total Dat Ex 3 Dat Ex CO 1 2 3 Dat Ex Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 1 1 Dat Ex IR source on the analyzer failed. Source was replaced followed by an auto cal.1 1 Dat Ex The monitor failed its daily/startup calibration. The monitor was recalibrated and returned to service.1 1 Dat Ex NOx 2 1 3 Dat Ex Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 2 2 Dat Ex Analyzer was in fault do to a board. Power was cycled and the fault cleared. Initiated auto calibration 1 1 Dat Ex SO2 3 3 Dat Ex Maintenance of another monitor required normal sampling to be interrupted. The system was returned to service following the maintenance. 3 3 Dat Ex Grand Total 6 3 9 Pacificorp Hunter EER 4Q2024 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 (blank)701 Grand Total (blank) (blank) (blank) 3 SO2 1 1 The unit was removed from service in a controlled fashion in order to repair leaks in the startup boiler feed pump. The leak was repaired and the unit returned to service. 1 1 NOx 1 1 The unit was removed from service in a controlled fashion in order to repair leaks in the startup boiler feed pump. The leak was repaired and the unit returned to service. 1 1 Grand Total 2 2 * Type Code 510 (F-factor, Equations & Conversion Factors) - 500 (All) Count of F-factor Column Labels Row Labels SO2 NOx Grand Total 1 1800 1 1 2 2 1800 1 1 2 3 1800 1 1 2 Grand Total 3 3 6 * 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