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Field Screening of Hydrocarbon Contaminated Water and Soil <br /> tHNU-Handby Environmental Test Kit <br /> ' Soil and water analysis may be camed out in the field with typical minimum <br /> detection levels for BTEX, unleaded gasoline, diesel fuel and crude oil of 1 ppm in <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/UST 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- <br /> ionization Detector (PID) The device uses an ultraviolet light detector and is <br /> especially sensitive to aromatics such as benzene, toluene and xylene with <br /> decreasing sensitivity to non-aromatic hydrocarbons and chlorinated hydrocarbon <br /> solvents Care should be used in interpreting readings where mixed vapor is <br /> encountered because sensitivity may vary The user should be familiar with the <br /> limitations of the calibration gas in use This instrument is useful as a general field <br /> survey tool <br /> Flame Ionization Detector <br /> ' Organic vapors in sod 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 <br /> unit, 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 /> ' C-15 <br /> 1 <br />