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' Field Screening of Hydrocarbon Contaminated Water and Soil <br /> ' HNU-Handby Environmental Test Kit <br /> Soil and water analysis may be carried out in the field with typical minimum <br /> ' detection levels for BTEX, unleaded gasoline, diesel fuel and crude oil of 1 ppm to <br /> soil and 100 ppb in water Detailed protocol is included with the test kit In general <br /> a small sample (i e 5 gram of soil is agitated with solvent After adding a color <br /> ' development catalyst the hue and intensity are compared with color standards to <br /> determine the contaminant type and concentration The Handby Method was <br /> documented in EPA report number 530/JST 90/003 Field Measurements <br /> Dependable Data When You Need It, published September 1990 The method is <br /> dependable for field screening Confirmation samples to verify cleanliness levels <br /> will be made after reaching minimum detection levels <br /> Portable Photo-ionization Detector <br /> ' Organic vapors in soil and water may be detected using a Portable Photo-ionization <br /> Detector (PID) The device uses an ultraviolet light detector and is especially <br /> sensitive to aromatics such as benzene, toluene and xylene with decreasing <br /> sensitivity to non-aromatic hydrocarbons and chlorinated hydrocarbon solvents <br /> Care should be used in interpreting readings where mixed vapor is encountered <br /> because sensitivity may vary The user should be familiar with the limitations of the <br /> ' calibration gas in use This instrument is useful as a general field survey tool <br /> ' Flame Ionization Detector <br /> Organic vapors in soil and water may be detected using a Flame Ionization <br /> ' Detector (FID) This is an organic vapor analyzer (OVA) that is similar to a PID unit, <br /> but uses a hydrogen flame detector instead of ultraviolet light to measure gas <br /> vapor The unit can operate as a limited field unit or as a gas chromatograph The <br /> ' commonly used OVA is factory-calibrated to methane Therefore, readings can <br /> only be reported relative to the methane standard used In the field survey mode, <br /> the FID reflects the total concentration of fuel vapors present <br /> 1 <br /> 1 <br /> 1 C - 16 <br /> 1 <br />