Level 1

• Analytical summary with cover page and sample narrative
• Analytical results
• Chain of Custody (COC)
  
  

Level 2

• Level 1 +
• Surrogate recoveries (when used)
• Continuing calibration verification
• Method blank summary
• LCS summary
• MS/MSD summary
• Replicate/duplicate summary
  
  

Level 3

• Level 2 +
• GC/MS tune reports
• Initial Instrument calibration
  
  

Level 4

• Level 3 +
• Raw data:
  • Instrument logs (bench sheets)
  • Extraction logs
  • Digestion logs
  • Data sheets/calculation sheets
  • Chromatograms (check, blank, LCS, MS/MSD, samples)
  • Spectra
  • Instrument sequences

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