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Quality Assurance Procedures for CCAQS Data: Field Measurements and Emissions Analysis

This document outlines the comprehensive Quality Assurance (QA) procedures for field measurement and emissions data related to the Canadian Clean Air Quality Standards (CCAQS). Part 1 focuses on the QA of field measurement data, including protocols followed by field data sources, contractors, and users who rely on the CCAQS database. It discusses standards for input formats, validity flags, and data levels. Part 2 covers the QA of emissions data, detailing QA processes related to emission inventories, modeling inputs, and stakeholder feedback, ensuring data integrity and reliability for informed decision-making.

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Quality Assurance Procedures for CCAQS Data: Field Measurements and Emissions Analysis

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  1. Quality Assurance Procedures for CCAQS Data • Part 1 - QA of Field Measurement Data • Part 2 - QA of Emissions Data

  2. Part 1 - QA of Field Measurement Data • QA performed by: • Field Data Sources (contracted & routine) • QA/QC and Data Analysis Contractors • Users (e.g. Stakeholder Data Analysis and Modeling of Episodes)

  3. CCAQS Database • Standards for input formats, variables, and files structures, etc. • Maintains all reported observations. Each observation is assigned... • One of five data levels that describes the QA/QC procedures that the observation has been subjected to. • A validity flag indicating the validity of the observation following the QA/QC procedure (e.g. V=valid, I=invalid, & S=suspect). • Standards for Data and Validity Flag Re-Submittal

  4. QA/QC Data Levels

  5. Data Sources • CCOS Contractors • CCAQS format, variables, and QA flags • Received as Level 1a • Database processes to Level 1b after automated consistency and reasonability checks (format, units, variable names, range checks, duplicate checks, etc.) • Supplemental (Non-CCOS) Sources • Their format, variables, and QA flags • Assumed to be Level 1a • CCAQS standardization conducted in-house and under contract with T & B systems • Submitted to database for automated Level 1b checks

  6. QA/QC Status • CCOS - • Validation of CCOS Data (Contractor performance problems) • Resubmittals: Episodic analyses by ARB • Final Validation of CCOS Field Data Project in place with Sonoma Technology • CRPAQS - • Data Analysis and QA/QC in Progress

  7. Final CCOS Data QA Contract(in place) • Comprehensive, independent check of database and the process to manage and QA the data • Audit/inventory of database contents versus field study contracts • Summary of all QA/QC conducted • ID, flag, and re-submit any gross outliers • Perform focused, in-depth analyses with input from TC • Summarize any problems encountered and provide recommendations

  8. Part 2 - QA of Emissions Data • QA performed via: • District-ARB Interaction: • Emission Inventory Tech. Adv. Committee (EITAC) • QA/QC of ARB’s ‘official’ inventory database, CEIDARS • QA/QC of ARB’s growth/control forecast system, CEFS • Gridded Inventory Coordination Group (GICG) • QA/QC of Modeling inputs • User Feedback • Modeling & Data Analysis • SIP Planning

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