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Home My WebLink AboutDAQ-2025-002264 1 DAQC-397-25 Site ID 12825 (B5) MEMORANDUM TO: FILE – UTAH ASSOCIATED MUNICIPAL POWER SYSTEM – NEBO Plant THROUGH: Harold Burge, Major Source Compliance Section Manager FROM: Rob Leishman, Environmental Scientist DATE: April 24, 2025 SUBJECT: Utah Associated Municipal Power System – Nebo Power Station (NEBO Power), Major, NSPS, HAPs, Title IV, and Title V, Utah County, FRS # UT0000004904900234 INSPECTION TYPE: State Electronic Data Report (SEDR) Review REVIEW DATE: April 24, 2025 SOURCE LOCATION: Payson (West side of I-15)/Utah County SOURCE CONTACT: David Gammell – Plant Manager – 801-925-4012 APPLICABLE REGULATIONS: Title V Operating Permit Permit Number: 4900234004 Date of Permit: January 18, 2022 Date of Last Revision: January18, 2022 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 NEBO’s relative accuracy performance specification test review memorandum. 1 8 2 2 SEDR Review: First Quarter 2025 % 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 BYPASS 0 CO Point source not operated BYPASS CO 0.00 25 Ppmvdc - 8-Hour Avg BYPASS 0 NOx Point source not operated BYPASS NOx 0.00 9 Ppmvdc - 30-Day RA BYPASS 0 O2 Point source not operated BYPASS NOx 0.00 97.12 Ppmvdc - 4-Hour RA HRSG 2150 CO 100% 01/21/25 05/29/24 HRSG CO 0.00 10 Ppmvdc - 8-Hour Avg HRSG 2150 NOx 100% 01/21/25 05/29/24 HRSG NOx 0.00 5 Ppmvdc - 30-Day RA HRSG 2150 O2 100% 01/21/25 05/29/24 HRSG NOx 0.00 97.12 Ppmvdc - 4-Hour RA Excess Emission Report - Hourly Summary Point Source Channel Startup & Shutdown Control Equipment Problems Process Problems Other Known Causes Unknown Causes Emission Limit BYPASS CO 0 0 0 0 0 25 Ppmvdc - 8-Hour Avg BYPASS NOx 0 0 0 0 0 9 Ppmvdc - 30-Day RA BYPASS NOx 0 0 0 0 0 97.12 Ppmvdc - 4-Hour RA HRSG CO 0 0 0 0 0 10 Ppmvdc - 8-Hour Avg HRSG NOx 0 0 0 0 0 5 Ppmvdc - 30-Day RA HRSG NOx 0 0 0 0 0 97.12 Ppmvdc - 4-Hour RA CMS Performance Summary - Hourly Summary Point Source Channel Monitor Malfunction Non-monitor Malfunction QA Calibrations Other Known Causes Unknown Causes BYPASS CO 0 0 0 0 0 BYPASS NOx 0 0 0 0 0 3 CMS Performance Summary - Hourly Summary Point Source Channel Monitor Malfunction Non-monitor Malfunction QA Calibrations Other Known Causes Unknown Causes BYPASS O2 0 0 0 0 0 HRSG CO 0 0 0 0 0 HRSG NOx 1 0 0 0 0 HRSG O2 0 0 0 0 0 Pollutant Concentration Exceeded Span of CEM Monitor Outage During Point Source Operation Alternate Sampling CEM Modifications 0 Hours 0 Hours 0 Hours 0 Events SOURCE INSPECTION SUMMARY EVALUATION: NEBO 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. 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.” NEBO was in compliance during this reporting period. NSPS monitoring system meets the performance standards of 40 CFR 60, Appendix B Performance Specifications. NEBO’s acid rain monitoring system meets the performance standards of 40 CFR 75 Acid Rain Performance Specifications. 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. ATTACHMENT: Excel spreadsheet review UAMPS Nebo EER 1Q2025 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 David Gammell 04900234 (801) 707-0255 Eric Hutchinson 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 1 2025 0 1 110 1 2025 2150 1 110 0 0 0 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 48I-AGPCA 1501663829 100 1000 4/21/2015 BYPASS STACK 1 200 NOx THERMO 42ILS-ANSSPCA 1501663828 20 200 4/21/2015 BYPASS STACK 1 200 O2 THERMO 48I-AGPCA 1501663829 0 25 4/21/2015 BYPASS STACK 1 200 CO THERMO 48I-AGPCA 1501663829 100 1000 4/21/2015 HSRG STACK 1 200 NOx THERMO 42ILS-ANSSPCA 1501663828 20 200 4/21/2015 HSRG STACK 1 200 O2 THERMO 48I-AGPCA 1501663829 0 25 4/21/2015 HSRG STACK 1 200 0 0 0 0 0 0 1/0/1900 0 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 Point source not operated 310 CO 0 0.00% 0 0 0 0 0 25 Ppmvdc 8-Hour Avg 1 Point source not operated 310 NOx 0 0.00% 0 0 0 0 0 9 Ppmvdc 30-Day RA 1 Point source not operated 310 NOx 0 0.00% 0 0 0 0 0 97.12 Ppmvdc 4-Hour RA 1 TRUE 310 CO 0 0.00% 0 0 0 0 0 10 Ppmvdc 8-Hour Avg 1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 5 Ppmvdc 30-Day RA 1 TRUE 310 NOx 0 0.00% 0 0 0 0 0 97.12 Ppmvdc 4-Hour RA 1 310 0 0 0 0 0 0 0 0 0 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 Point source not operated 300 CO 0 0.00% 0 0 0 0 0 0 1 Point source not operated 300 NOx 0 0.00% 0 0 0 0 0 0 1 Point source not operated 300 O2 0 0.00% 0 0 0 0 0 0 1 TRUE 300 CO 2150 0.00% 0 0 0 0 0 0 1 TRUE 300 NOx 2150 0.05% 1 1 0 0 0 0 1 TRUE 300 O2 2150 0.00% 0 0 0 0 0 0 1 300 0 0 0 0 0 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 1 363 Days 250 CO 05/29/24 06/01/23 12 C15 8.3 8.5 2.80% Pass 1 363 Days 250 NOx 05/29/24 06/01/23 12 C15 4.5 4.71 7.69% Pass 1 363 Days 250 NOx 05/29/24 06/01/23 12 lbs/mmbtu 0.017 0.017 7.68% Pass 1 363 Days 250 O2 05/29/24 06/01/23 12 Pct 14.76 14.97 0.21% Pass 1 0 Days 250 0 01/00/00 01/00/00 0 0 0 0 0.00% 0 Point Source Point Source BYPASS HRSG 0 0 Point Source BYPASS BYPASS HRSG HRSG HRSG HRSG HRSG 0 0 BYPASS BYPASS BYPASS UAMPS NEBO Power Station 0 BYPASS BYPASS BYPASS HRSG HRSG HRSG 0 0 HRSG 0 0 BYPASS HRSG HRSG HRSG HRSG 0 UAMPS Nebo EER 1Q2025 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 01/21/25 CO CC741396 02/09/25 0 PPM 28.267 27.5 2.80% Pass 0 1 Valid Cal. Gas 260 CO 01/21/25 CO CC736016 02/21/29 0 PPM 58.1 58.3 0.30% Pass 0 1 Valid Cal. Gas 260 CO 01/21/25 CO CC464906 02/11/29 0 PPM 286.7 286.6 0.00% Pass 0 1 Valid Cal. Gas 260 CO 01/21/25 CO CC140074 02/05/32 0 PPM 589.9 589 0.20% 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 NOx 01/21/25 Low CC741396 02/09/25 QA PPM 5.533 5.7 2.90% Pass Low 1 Valid Cal. Gas 270 NOx 01/21/25 Mid CC736016 02/21/29 QA PPM 11.733 11.9 1.40% Pass Low 1 Valid Cal. Gas 270 NOx 01/21/25 High CC754211 05/03/27 QA PPM 18 17.9 0.60% Pass Low 1 Valid Cal. Gas 270 NOx 01/21/25 Low CC464906 02/11/29 QA PPM 58.8 58.3 1% Pass High 1 Valid Cal. Gas 270 NOx 01/21/25 Mid CC140074 02/05/32 QA PPM 118.433 118.2 0% Pass High 1 Valid Cal. Gas 270 NOx 01/21/25 High CC12956 04/22/32 QA PPM 180.167 180.6 0% Pass High 1 Valid Cal. Gas 270 O2 01/21/25 Low CC741747 10/26/31 QA PERCENT 7.033 7 0.50% Pass 0 1 Valid Cal. Gas 270 O2 01/21/25 Mid CC426251 10/26/31 QA PERCENT 14.6 14.6 0.00% Pass 0 1 Valid Cal. Gas 270 O2 01/21/25 High EB0157466 04/29/32 QA PERCENT 20.5 20.4 0.50% 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 0 210 0 1/0/00 0:00 1/0/00 0:00 1 1 None Reported 1 0 TC 220 Hours 0.00 TC 220 Hours 0.00 TC 230 Hours 0.00 Events 0.00 Hours 0.00 Events 0.00 0.00 1 1.00 TC 300 Hours 1.00 FALSE None Reported None ReportedNone Reported None Reported None Reported None Reported None Reported Point Source Point Source Point Source 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) HRSG HRSG Type Code 530 (Excess Emissions During Emergency Conditions) 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) HRSG HRSG 0 HRSG HRSG HRSG HRSG HRSG 0 HRSG HRSG HRSG HRSG 0 UAMPS Nebo EER 1Q2025 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 2025 HRSG CO 05/29/24 06/01/23 12 C15 8.3 8.50 2.80% Pass HRSG NOx 05/29/24 06/01/23 12 C15 4.5 4.71 7.69% Pass HRSG NOx 05/29/24 06/01/23 12 lbs/mmbtu 0.017 0.02 7.68% Pass HRSG O2 05/29/24 06/01/23 12 Pct 14.76 14.97 0.21% Pass * NSPS CGA First 2025 Audit Gas Ranges Audit Gas Ranges AP1 Low AP2 Low AP1 High AP2 High HRSG CO 1/21/25 100 27.5 20 to 30 50 to 60 HRSG CO 1/21/25 100 58.3 20 to 30 50 to 60 HRSG CO 1/21/25 1000 286.6 200 to 300 500 to 600 HRSG CO 1/21/25 1000 589 200 to 300 500 to 600 * Acid Rain Audit Linearity First 2025 Low Span Gas Ranges High Span Gas Ranges Low Mid High Low Mid High HRSG NOx 1/21/25 20 5.7 4 to 6 HRSG NOx 1/21/25 20 11.9 10 to 12 HRSG NOx 1/21/25 20 17.9 16 to 20 HRSG NOx 1/21/25 200 58.3 40 to 60 HRSG NOx 1/21/25 200 118.2 100 to 120 HRSG NOx 1/21/25 200 180.6 160 to 200 HRSG O2 1/21/25 25 7 5 to 7.5 HRSG O2 1/21/25 25 14.6 12.5 to 15 HRSG O2 1/21/25 25 20.4 20 to 25 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 UAMPS Nebo EER 1Q2025 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 UAMPS Nebo EER 1Q2025 Type Code 220 (Monitor Outage During Point Source Operation) - 600 (All) * Sum of Hours Column Labels Row Labels (blank) Grand Total (blank) (blank) 0 0 Grand Total 0 0 UAMPS Nebo EER 1Q2025 NOx * NOx Type Code 420 (NOx) - 6000 (All) NOx * NOx Count of Magnitude of Emissions Column Labels NOx Row Labels Grand Total NOx Grand Total 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 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 UAMPS Nebo EER 1Q2025 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