title: Simultaneous counter-flow of chlorinated volatile organic compounds across the saturated-unsaturated interface region of an aquifer.
abstract: Concentrations of chlorinated volatile organic compounds (Cl-VOCs) at the saturated-unsaturated interface region (SUIR; depth of approximately 18m) of a sandy phreatic aquifer were measured in two monitoring wells located 25m apart. The concentrations of the Cl-VOCs obtained above and below the water table along a 413-day period are interpreted to depict variable, simultaneous and independent movement of trichlorothene, tetrachloroethene, 1,1-dichloroethene, cis-1,2-dichloroethene, 1,1,1-trichloroethane, chloroform and 1,1-dichloroethane vapors in opposite directions across the SUIR.
authors.affiliation: Hydrological Service and Water Quality Division, Israel Water Authority, POB 20365, Tel Aviv 61203, Israel. danronen@bgu.ac.il
authors.forename: Daniel
authors.initials: D
authors.lastname: Ronen
authors.forename: Hagit
authors.initials: H
authors.lastname: Lev-Wiener
authors.forename: Ellen R
authors.initials: ER
authors.lastname: Graber
authors.forename: Ofer
authors.initials: O
authors.lastname: Dahan
authors.forename: Noam
authors.initials: N
authors.lastname: Weisbrod
mesh_terms: D002725:Chloroform / Q000032:analysis; D004000:Dichloroethylenes / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods; D005018:Ethyl Chloride / Q000031:analogs & derivatives / Q000032:analysis; D005618:Fresh Water / Q000032:analysis* / Q000737:chemistry; D019015:Geologic Sediments / Q000737:chemistry*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D007557:Israel; D013750:Tetrachloroethylene / Q000032:analysis; D014240:Trichloroethanes / Q000032:analysis; D055549:Volatile Organic Compounds / Q000032:analysis*; D014835:Volatilization; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D004000:Dichloroethylenes; D006843:Hydrocarbons, Chlorinated; D014240:Trichloroethanes; D055549:Volatile Organic Compounds; D014874:Water Pollutants, Chemical; C501196:1,1-dichloroethane; C024566:1,1,1-trichloroethane; D005018:Ethyl Chloride; D002725:Chloroform; D013750:Tetrachloroethylene; C035384:1,2-dichloroethylene