||Soil-gas measurement for detection of subsurface organic contamination
Kerfoot, Henry B.
||Lockheed Engineering and Management Services Co., Inc., Las Vegas, NV.;Environmental Monitoring Systems Lab., Las Vegas, NV.
||Environmental Monitoring Systems Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
||EPA/600/2-87/027 ; 68-03-3245 ; EPA 600/2-87/027
Soil air--Measurement ;
Organic compounds ;
Ground water ;
Carbon tetrachloride ;
Mass spectroscopy ;
||Region 9 Library/San Francisco,CA
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||ix, 51 p. ; 28 cm.
The Lockheed Gas Analysis System (LGAS) grab-sampling method and the PETREX Static Surface Trapping Pyrolysis/Mass Spectrometry (SST-Py/MS) passive sampling technique for soil-gas measurement have been field tested at the Pittman Lateral near Henderson, Nevada. This site has unconfined ground water at 5 to 14 feet (1.5 to 4.3m) below the surface in alluvial fan sediments. Distinct chloroform and benzene/chlorobenzene contaminant plumes cross the site and have been delineated by repeated analyses of ground water from a line of boreholes spaced 200 feet apart. The LGAS technique successfully measured a chloroform soil-gas plume above the chloroform ground-water plume. The chloroform concentrations in soil-gas samples correlate well with ground-water concentrations. Further research is needed to establish which factors limit the survey precision.
"March 1987." "Contract Number 68-03-3245."