Validation of Custom or Modified Analytical Methods

• Soil Gas

  • Follows DTSC/RWQCB advisory on active soil gas investigations

  • Verify equilibrium times

  • Verify holding times

  • Evaluation of duplicates and dilution dups

  • Purge volume test

  • Leak test (tracer compound)

  • Purge/sample flow rate

  • Sample containers and handling

  • Trip blanks

  • VOCs, Methane, H₂S

  • Handheld equipment verification

   

• XRF

  • EPA Method 6200

  • Duplicates

  • Check sample analysis

  • Blank analysis

  • Correlation Coefficient calculation

• IC
  • Hex Chrome
  • Perchlorate
  • Anions

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