Policy Memoranda and Technical Guidance
These documents provide support for ambient air monitoring quality assurance practices and data reporting procedures.
- Ozone Absorption Cross-Section Value Implementation Memo (pdf)
- EPA Protocol Gas Long-Term Stability Requirements (pdf)
- Steps to Qualify or Validate Data after an Exceedance of Critical Criteria Checks (pdf)
- Use of Nafion Dryers for Ultraviolet (UV) Ozone Analyzers (pdf)
- Use of PM2.5 Method Designation Codes in QA Collection Requirements (pdf)
- Alternative to Calibration Procedures Described in NO2, SO2 and CO Methods (pdf)
- Clarifications and Guidance on Shelter Temperature Guidance for Ambient Air Pollutant Methods (pdf)
- Clarifications and Guidance on Gaseous Pollutant Methods (pdf)
- EPA Review of Monitoring Organization QAPP's for Critical Criteria Conformance (pdf)
- Technical Note-Clarification on Use of Automatic Zero Adjustments (pdf)
- Technical Note - Reporting Negative Values for Criteria Pollutant Gaseous Monitors to AQS (pdf)
- Guidance on Statistics for Use of 1-Point QC Checks at Lower Concentration (pdf)
- Technical Note - PSD Monitoring Quality Assurance Issues (pdf)
- Technical Guidance on the Use of Electronic Logbooks for Ambient Air Monitoring (pdf)
- Technical Guidance on Identifying Annual PE Audit Levels Using Method Detection Limits and the 99th Percentile (pdf)
- 2014 Gaseous Pollutant Statistics at the Site Level (pdf)
- 2014 Gaseous Pollutant Statistics at the PQAO Level (pdf)
- Clarification on Use of PM2.5 Field and Laboratory Requirements for Low Volume PM10 Monitoring to Support PM10 NAAQS (pdf)
- Determining the Primary Quality Assurance Organizations for Industrial Monitors in Support of the SO2 Data Requirements Rule (pdf)
- Revision to the Zero Drift Acceptance Criteria in the QA Handbook (pdf)
- Guidance on the Use of Parameter Occurrence Codes (POCs) When Using Multiple Instruments at Monitoring Sites (pdf)
- Guidance on the Interpretation of the PM Filter Archive Requirements described in 40 CFR Part 58.16 (pdf)
- Additional Guidance on Flow Rate Requirements on Pb Sampling with TSP Samplers (pdf)
- Guidance on the PB Performance Evaluations Program for Monitoring Organizations Who are Monitoring for PB Only at NCore Sites (pdf)
- Technical Guidance on Assessment Statistics for Annual Performance Evaluations (pdf)
- Use of Expanded List of Audit Levels for Annual Performance Evaluation for SO2, NO2, O3, and CO as Described in 40 CFR Part 58, Appendix A, Section 3.2.2, (pdf)
- NAAQS Reporting Update (pdf)
- Use of "Non-Regulatory" Monitor Type Code in AQS to Identify Criteria Pollutant Monitors that do not, or are not Intending to Provide Data for Regulatory Purposes (pdf)
- Graded Approach for Tribal QAPPs and QMPs for Tribal Monitoring Programs (pdf)
- Ambient Air Monitoring Network Assessment Guidance (pdf)
- Parameter Codes Used to Report PM2.5 Continuous Monitor and Speciation Sampler Data to AQS (pdf)
- Draft Report - Analytical Techniques for Technical Assessments of Ambient Air Monitoring Networks (pdf)
- OAQPS/EMAD 12/02/97, William F. Hunt Sr, Memorandum - "Waivers for PM10 Sampling Frequency" (pdf)
- OAQPS/EMAD 9/15/1997, William F. Hunt Sr, Memorandum - "Collection and Reporting of PM10 Data" (pdf)
- Memo from William G. Laxton, "Use of Collocated PM10, Data" (pdf)