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Hydrocarbons detected with UVOST Hydrocarbons rarely detected using <br /> UVOST <br /> GasolineExtremely weathered gasoline <br /> Diesel Coal tar <br /> _ Jet Kerosene Creosote <br /> Motor Oil Bunker Oil <br /> Cutting fluids Polychlorinated bi- henols PCB's <br /> Hydraulic fluids Chlorinated solvent DNAPL <br /> Crude Oil Dissolved phase aqueous PAH's <br /> Potential False Positives Potential False Negatives <br /> fluorescence observed (do not fluoresce <br /> Sea-shells (weak-medium) Extremely weathered fuels (especially <br /> gasoline) <br /> Paper(medium-strong depending on color) Aviation gasoline (weak) <br /> _ Peat/meadow mat weak Coal tars most <br /> Calcite/calcareous sands weak Creosotes most <br /> Tree roots (weak-medium) "Dry" PAHs such as aqueous phase, lamp <br /> black, urifier chips <br /> Sewer lines (medium-strong) Most chlorinated solvents <br /> Benzene, toluene, z lenes (relatively pure <br />