DETECTION OF SUBSURFACE CONTAMINATION
FREE PHASE

     COLLECTION

- collection using hand probes
- collection using bailers in monitor wells

  ANALYSES



SCREENING ANALYSES

- Synchronous Fluorescence
- C5+

EPA ANALYSES

- High Resolution Gas Chromatography

INTERPRETATION

  KEY CONCEPTS

- free phase contamination implies an advanced stage of petroleum fuel hydrocarbon contamination
- free phase is the major contributor to dissolved phase contamination in the aquifer
- the thickness of free phase in a monitor well is greatest during periods of low water levels in the aquifer
- product recovery wells and remediation wells should be placed in areas of maximum free and residual phase contamination .