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Technical Documents & Reports

This file repository is deprecated. Please use the "Air monitoring data and technical reports" page (https://cdphe.colorado.gov/air-monitoring-data-and-technical-reports) to locate the documents you are interested in and update your bookmarks.

If this document is inaccessible in its current form, please contact APCD or CDPHE records office at (303) 692-3220 / cdphe.commentsapcd@state.co.us or the Nondiscrimination Coordinator at cdphe_nondiscrimination@state.co.us or 303-692-2102 to request a digitally accessible copy.

Si no es posible acceder a este documento en su forma actual, comuníquese con la oficina de registros de la División de Control de la Contaminación del Aire (Air Pollution Control Division, APCD) o del Departamento de Salud Pública y Medio Ambiente de Colorado (Colorado Department of Public Health and Environment, CDPHE) al (303) 692-3220 / cdphe.commentsapcd@state.co.us, o con el coordinador de no discriminación en cdphe_nondiscrimination@state.co.us o al 303-692-2102, para solicitar una copia accesible de forma digital.


Annual Air Quality Data Reports
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  • 2023 Annual Data - Report [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=44469763]
  • 2022 Annual Data - Report [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=27480191]
  • 2021 Annual Data - Report [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=27481595]
  • 2020 Annual Data - Report
  • 2019 Annual Data - Report
  • 2018 Annual Data - Report
  • 2017 Annual Data - Report
  • 2016 Annual Data - Report
  • 2015 Annual Data - Report
  • 2014 Annual Data - Report
  • 2013 Annual Data - Report
  • 2012 Annual Data - Report
  • 2011 Annual Data - Report
  • 2010 Annual Data - Report
  • 2009 Annual Data - Report
  • 2008 Annual Data - Report
  • 2007 Annual Data - Report
  • 2006 Annual Data - Report
  • 2005 Annual Data - Report
  • 2004 Annual Data - Report
  • 2003 Annual Data - Report
  • 2002 Annual Data - Report
  • 2001 Annual Data - Report
  • 2000 Annual Data - Report
Annual Network Plans
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  • 2025 Network Monitoring Plan
  • 2024 Network Monitoring Plan [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=27559374]
  • 2023 Network Monitoring Plan [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=27559376]
  • 2022 Network Monitoring Plan [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=27559379]
  • 2021 Network Monitoring Plan [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=27559388]
  • 2020 Network Monitoring Plan
  • Enhanced Monitoring Plan for Ozone [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=36710722]
  • 2019 Network Monitoring Plan
  • 2018 Network Monitoring Plan
  • 2017 Network Monitoring Plan
  • 2016 Network Monitoring Plan
  • 2015 Network Monitoring Plan
  • 2014 Network Monitoring Plan
  • 2013 Network Monitoring Plan
  • 2012 Network Monitoring Plan
  • 2011 Network Monitoring Plan
  • 2010 Network Monitoring Plan
  • 2009 Network Monitoring Plan
  • 2008 Network Monitoring Plan
  • 2007 Annual Network Plan
5-Year Network Assessments
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  • 2025 5-Year Monitoring Network Assessment
  • 2020 5-Year Monitoring Network Assessment [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=46365620]
  • 2015 5-Year Monitoring Network Assessment
  • 2010 5-Year Monitoring Network Assessment
Quality Assurance
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  • APCD Quality Assurance Project Plan 2023 [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=27559598]
  • APCD Quality Management Plan 2023 [https://oitco.hylandcloud.com/cdphermpop/docpop/docpop.aspx?docid=27559609]
Exceptional Events
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  • Technical Support Document for the September 2 and 4, 2017, Ozone Exceptional Event
  • CDPHE Request for Exceptional Event
  • EPA Concurrence letter
  • EPA Concurrence TSD
  • Technical Support Document for the August 22, 2015, Lamar Exceptional Event
  • Technical Support Document for the March 30, 2014, Alamosa Exceptional Event
  • Technical Support Document for the April 8, 2013, April 23, 2013, May 1, 2013 and May 31, 2013 Alamosa Exceptional Events
  • Technical Support Document for the April 16, 2013 Alamosa, Pagosa Springs, Durango and Crested Butte Exceptional Event
  • Technical Support Document for the April 1, 2015 and April 2, 2015 Lamar Exceptional Events
  • Technical Support Document for the May 26, 2012 and June 20, 2012 Alamosa Exceptional Events
  • Technical Support Document for the March 11, 2014, March 15, 2014, March 18, 2014, March 29, 2014, March 30, 2014, March 31, 2014, April 23, 2014, April 29, 2014 and November 10, 2014 Lamar Exceptional Events
  • Technical Support Document for the February 8, 2013, April 9, 2013, May 1, 2013, May 24, 2013, May 25, 2013, May 28, 2013 and December 24, 2013 Lamar Exceptional Events
  • Technical Support Document for the November 10, 2012, Lamar Exceptional Event
  • Technical Support Document for the April 02, 2012, Alamosa and Lamar Exceptional Event
  • Technical Support Document for the March 18, 2012, Alamosa and Lamar Exceptional Event
  • Technical Support Document for the February 28, 2012, Lamar Exceptional Event
  • Technical Support Document for the February 23, 2012, Alamosa Exceptional Event
  • Technical Support Document for the December 1, 2011, Alamosa Exceptional Event
  • Technical Support Document for the April 3, 2011, Alamosa and Lamar Exceptional Event
  • Technical Support Document for the November 5, 2011, Lamar Exceptional Event
  • Technical Support Document for the April 16, 2013, Telluride Exceptional Event
  • Technical Support Document for the April 5, 2010, Alamosa, Pagosa Springs, Durango, Telluride, Crested Butte, and Mt. Crested Butte Exceptional Event
  • Technical Support Document for the April 28 & 29, 2010, Alamosa, Pagosa Springs, and Durango Exceptional Event
  • Technical Support Document for the May 11, 2010, Alamosa and Pagosa Springs Exceptional Event
  • Technical Support Document for the May 22 and 23, 2010, Alamosa, Pagosa Springs, and Grand Junction Exceptional Event
  • Technical Support Document for the April 8, 2009 Exceptional Event
  • Technical Support Document for the April 3, 2009 Exceptional Event
  • Addendum to the "Technical Support Document For the April 3, 2009 Pagosa Springs Exceptional Event"
  • Technical Support Document for the March 22, 2009 Exceptional Event
  • Addendum to the "Technical Support Document For the March 22, 2009 Pagosa Springs Exceptional Event"
  • Technical Support Document for the February 27, 2009 Exceptional Event
  • Technical Support Document for the January 19, 2009 Exceptional Event
  • Technical Support Document for the May 24, 2010 Stratospheric Ozone Exceptional Event
  • Technical Support Document for the May 22, 2008 Exceptional Event
  • Technical Support Document for the May 2, 2008 Exceptional Event
  • Technical Support Document for the October 30, 2003 Natural Event
  • Supplemental Information Concerning the October 30, 2003 Exceptional Event
  • 2002 February and March Multiple High Wind Events
  • 2002 May and June Multiple High Wind Events
  • Technical Support Document - March 31, 1999 High Wind PM10 Event (9/28/99)
Miscellaneous
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  • EPA Completeness Determination letter for the 2018 DM/NFR, Alamosa, and Prowers Mitigation Plans
  • DM/NFR Mitigation Plan 2018
  • Alamosa Mitigation Plan 2018
  • Prowers Mitigation Plan 2018
  • Grand Junction Blowing Dust Climatology
  • Lamar Natural Events Action Plan 2012
  • Lamar Blowing Dust Climatology 2010
  • Alamosa Natural Events Action Plan 2003
  • Lamar Natural Events Action Plan 2003
  • An Evaluation of Federal Land Manager Activities that may Impact Air Quality Related Values in Class I Areas
  • Hygiene, Colorado PM10 Receptor Modeling Study 2000
  • Hygiene, Colorado PM10 Receptor Modeling Study - Appendices
Special Studies
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  • NCAR FRAPPE and DISCOVER-AQ Source Impact Analysis
  • NCAR FRAPPE and DISCOVER-AQ Source Impact Analysis- Report
  • NCAR FRAPPE and DISCOVER-AQ Source Impact Analysis- Appendix
  • North Front Range Oil and Gas Air Pollutant Emission and Dispersion Study
  • North Front Range Oil and Gas Air Pollutant Emission and Dispersion Study - Report
  • North Front Range Oil and Gas Air Pollutant Emission and Dispersion Study - Data
  • Exploratory Analysis of Ozone Dynamics in the Colorado Springs Region in 2018
  • Supplemental Materials
  • Exploratory Analysis of Ozone Dynamics Along I-70 on the Front Range in 2017
  • Exploratory Analysis of Ozone Dynamics in Grand Junction during Summer 2016
  • Exploratory Analysis of Ozone Dynamics in the Pueblo Region during Summer 2015
BART Modeling Documents and Files
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  • See Colorado's main regional haze website: [http://www.cdphe.state.co.us/ap/regionalhaze.html]
  • Supplemental BART Analysis CALPUFF Protocol for Class I Federal Area Visibility Improvement Modeling (DRAFT)
  • Modeling guidance for BART 5-step process.
  • CALMET/CALPUFF BART Protocol for Class I Federal Area Individual Source Attribution Visibility Impairment Modeling Analysis
  • BART CALPUFF Modeling Results - Individual Source Attribution Visibility Impairment Modeling Analysis (BART exemption analysis):
  • Summary of final CALPUFF exemption modeling results for all BART-eligible sources listed below: see Regional Haze website [http://www.cdphe.state.co.us/ap/regionalhaze.html]
  • CEMEX, Inc., Lyons Cement Plant - Report
  • Cherokee Station - Boiler 4 - Report
  • Comanche Station - Boilers 1 and 2 - Report
  • Craig Station - Units 1 & 2 - Report
  • Hayden Station - Units 1 & 2 - Report
  • Lamar Light & Power Boiler #6 - Report
  • Martin Drake Power Plant - Units 5, 6, 7 - Report
  • Martin Drake Power Plant - Units 5, 6, 7 - Refined Report. This subject-to-BART analysis was submitted by the source operator to replace the Division's November 4, 2005 analysis. See supplemental analysis.
  • Martin Drake Power Plant - Units 5,6,7 - Addendum to Refined Report. Supplement to the August 17, 2007 subject-to-BART analysis. Refer to regional haze SIP for outcome.
  • Pawnee Station - Unit 1 (status pending) - Report
  • Ray D. Nixon Power Plant - Unit 1 - Report
  • Ray D. Nixon Power Plant - Unit 1 - Refined Report. This subject-to-BART analysis was submitted by the source operator to replace the Division's November 4, 2005 analysis. The Division reviewed the analysis and requested revisions.
  • Ray D. Nixon Power Plant - Unit 1 - Supplemental Refined Report. This report addresses the Division's comments on the May 2006 subject-to-BART analysis.
  • Suncor Denver Refinery (including former Valero Refinery) - Report
  • Trigen-Colorado Golden Facility Units 4 & 5 - Report
  • Valmont Station - Boiler 5 - Report
Carbon Monoxide Technical Support Documents
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  • Carbon Monoxide Maintenance Plan Revision for the Longmont Attainment Area
  • Carbon Monoxide Maintenance Plan Revision for the Denver-Boulder Attainment Area
  • Appendix
  • Appendix
  • Carbon Monoxide Maintenance Plan Revision for the Greeley Attainment Area
  • Carbon Monoxide Maintenance Plan Revision for the Colorado Springs Attainment Area
  • Appendix
  • Carbon Monoxide Maintenance Plan Revision for the Longmont Attainment Area
  • Appendix
  • Ft Collins, Colorado Carbon Monoxide Redesignation request and maintenance plan for the Fort Collins Non-Attainment Area.
  • Technical Support Document - Carbon Monoxide Redesignation Request and Maintenance Plan for the Denver Metropolitan Area
  • Appendices (10/7/99)
Ozone (8-hour) Denver MetroArea/North Front Range 8-Hour Ozone SIP TSD
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  • DMA/NFR 8-hour O3 SIP Technical Support Documents (TSD) [http://www.colorado.gov/airquality/documents/deno308/ ]
Ozone (8-hour) Denver Ozone Early Action Compact (EAC) TSD
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  • Denver Early Action Ozone Compact Technical Support Documents [http://www.colorado.gov/airquality/documents/eac/]
  • EAC SIP AQCC Draft
  • Air Quality Modeling Analysis for Denver - Ozone Source Apportionment Modeling
Particulate Matter Technical Support Document - Denver
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  • Particulate (PM10) Redesignation Request and Maintenance Plan for the Denver Metropolitan Area - Technical Support Document
  • Appendix A
  • Appendix B
  • Appendix C
  • Appendix D
  • Appendix E
  • Appendix F
  • Appendix G
  • Appendix H
  • Appendix I
  • Appendix J
  • Appendix K
  • Appendix L
  • Particulate (PM10) Redesignation Request and Maintenance Plan for the Denver Metropolitan Area - Revised Technical Support Document
Particulate Matter Technical Support Document - Cañon City
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  • Particulate Matter Technical Support Document
Standard Operating Procedures – Air Quality Monitoring
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  • Data Validation Standard Operating Procedures and Templates
  • Appendix D1 SOP for the Collection of Ambient Air Quality Data
  • Appendix D2 SOP for the Processing and Verification of Gaseous and Meteorological Data
  • Appendix D3 SOP for the Data Management Operations of Filter Based Particulate Data
  • Appendix D4 SOP for Precision & Accuracy Data Processing, Quarterly Data Validation, Verification, and Annual Data Certification
  • Appendix D5 SOP for Generating QA Data Strings for AQS
  • Appendix D6 SOP for EPA’s Air Quality Systems
  • Appendix DQ Data Qualifiers
  • Appendix MQO Measurement Quality Objectives and Acceptance Criteria Validation Templates
  • Gaseous and Meteorological Monitoring Standard Operating Procedures
  • Appendix GM1 SOP for the Operation of Gaseous and Meteorological Monitoring Shelters
  • Appendix GM2 SOP for Gas Analyzer Calibrations
  • Appendix GM3 SOP for the Determination of Ozone in Ambient Air - 2BTech Analyzers
  • Appendix GM4 SOP for the Dynamic Dilution Calibrator And Zero Air Generator
  • Appendix GM5 SOP for Meteorological Monitoring
  • Appendix GM5A SOP for Meteorological Monitoring with a Mobile Tower
  • Appendix GM6 SOP for Gas Cylinder Verification
  • Appendix GM7 SOP for the OPTEC LPV-2 Transmissometer
  • Appendix GM8 SOP for the OPTEC NGN-2 Nephelometer
  • Appendix GM9 SOP for the Remote High-Resolution Digital Camera System (Currently Under Revision)
  • Appendix GM10 SOP for the Determination of Toxic Organic Compounds in Ambient Air
  • Appendix GM11 SOP for Operation and Maintenance of a Ceilometer (PAMS) (Currently Under Development)
  • Appendix GM12 SOP for Carbonyls Measurements (PAMS) (Currently Under Development)
  • Appendix GM13 SOP for Operation and Maintenance of a Gas Chromatograph (PAMS) (Currently Under Development)
  • Appendix GM14 SOP for Solar Radiation Measurements (PAMS) (Currently Under Development)
  • Appendix GM15 SOP for Method Detection Limit (MDL) Determination
  • Particulate Matter Standard Operating Procedures
  • Appendix PM1 SOP for Monitoring PM10 in Ambient Air Using a High Volume Sampler
  • Appendix PM2 SOP for Operation and Maintenance of the Low Volume Filter Based PM2.5 and PM10 Particulate Samplers
  • Appendix PM3 SOP for the Determination of Particulate Matter in Ambient Air Using a TEOM
  • Appendix PM4 SOP For The Determination Of PM10 And PM25 In Ambient Air Using A GRIMM EDM 180
  • Appendix PM5 SOP for the Chemical Speciation Network (CSN) – URG 3000N
  • Appendix PM6 SOP for the Chemical Speciation Network (CSN) - SASS And SUPERSASS
  • Appendix PM7 SOP for the Operation of the TAPI Model 633 Aethalometer
  • Appendix PM8 SOP for the Operation of the TAPI Model T640 Particulate Monitor
  • Quality Assurance Standard Operating Procedures
  • Appendix QA1 SOP for Performance Evaluations / Audits
  • Appendix QA2 SOP for Standards Calibration and Verification
  • Appendix QA3 SOP for the Quality Assurance Review of Gaseous and Meteorological Data
  • Appendix QA4 SOP for the Zero Air Generator Verification
  • QAPP-Specific Standard Operating Procedures
  • Appendix P1 SOP for Amending QMPs, QAPPs, and SOPs
  • Appendix P2 Glossary, Acronyms & Abbreviations
  • Appendix P3 References
PSD Increment
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  • Periodic Assessment of Nitrogen Dioxide PSD Increment Consumption in SW Colorado - Phase I Report