Quality Assurance Procedures for CCAQS Data Part

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

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)

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

QA/QC Data Levels

Data Sources • CCOS Contractors – CCAQS format, variables, and QA flags – Received as Level 1 a – Database processes to Level 1 b 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 1 a – CCAQS standardization conducted in-house and under contract with T & B systems – Submitted to database for automated Level 1 b checks

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

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

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