This page contains information on the Quality Assurance program for the PM_2.5 Chemical Speciation Network (CSN).

Quality Assurance Project Plans (QAPP), Standard Operating Procedures (SOP), and Worksheets

Field Operations

• Field Operations QAPP, Sampler SOPs, and Operating Manuals
• 2019 CSN TSA, Sampler Audit, and Flow Check Worksheet(568 K)

Filter Shipping and Handling

• Filter handling laboratory QAPP and SOPs

Laboratory Analysis

• Laboratory Analysis and Data Processing/Validation QAPP
• Ion Analysis SOPs
• Light Absorption Analysis SOPs
• Elemental Analysis SOPs
• Carbon Analysis SOPs
• Data Validation and Reporting SOP

Long-term Archiving of Filters

• SOP

Performance Evaluations

• Interlaboratory Performance Evaluation Comparison Results (CSN Mega PE)