ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00393.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00394.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00395.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00396.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00397.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThe water‐soluble fractions of unleaded gasoline, kerosene and diesel fuel were evaluated by U.S. EPA Methods 602, 610, and 625.Several chemical indicator compounds useful in assessing petroleum contamination of ground water, including benzene, substituted benzenes, n‐alkanes, and polynuclear aromatic hydrocarbons, were identified. These were applied to the interpretation of data collected from monitoring wells at gasoline service stations that were undergoing ground water remediation. The chemical indicators are used to identify the likely type(s) of petroleum contamination. Certain hydrocarbons may be unique to specific fuel types.Gas chromatograms of field sample extracts were compared with chromatograms of laboratory water‐soluble fractions (WSFs) and neat fuels (unleaded gasoline, kerosene, and diesel). In some situations, field samples represented water‐soluble fractions of the contaminating fuel. In others, a fuel‐water agglomeration was indicated, with the chromatograms showing peaks that represented components of both the WSFs and the neat fuels.The use of both gas chromatography pattern identification and chemical indicators appears to be a viable approach to assessing ground water contamination caused by petroleum

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00398.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractA device was developed to make fine‐scale in situ measurements of formation and ground water conductivity at depths up to 10 meters in unconsolidated shallow aquifers. It consists of a casing that is left in place (“disposable”) and a probe that slides down the center of the casing making readings or taking water samples through screened slots. The device is inexpensive, designed to be jetted into place, and intended for use in monitoring situations where drilling rigs and wireline logs are impractical. It offers, in principle, 10cm resolution of the conductivities and the formation factor as a function of time.Results from three of these units installed across a landfill plume near North Bay, Ontario, demonstrate the usefulness of these kinds of measurements in a monitoring study, and the problems that can be encountered in a highly contaminated enviro

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00399.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThe experimental results derived from a laboratory model of gasoline migration from a simulated leaking underground storage tank (UST) demonstrate that the direction of migration through the simulated fill material is essentially straight down. Consequently, the U‐tube design for leak detection monitoring of USTs has limited utility because that design relies on the assumption that the path of migration of the leaked fluids will follow the surface of the tank to the bottom and be intercepted by the U‐tube be

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00400.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractGround water monitoring data collected during the past eight years at a permitted municipal solid waste (MSW) disposal facility located in the midwestern United States indicated fluctuations in typical leachate indicator parameter concentrations. Apparent trends in the data inferred leachate outbreak, generating suspicion as to the integrity of the landfill liner. Eight ground water monitoring wells were installed in three distinct geologic units at the landfill facility, including glacial drift, silurian dolomite, and a post‐glacial peat fen, which is downgradient from the landfill. Piezometer nests were used to define ground water gradients at the site. Using boron as an indicator, the occurrence of analytes of concern in the downgradient monitoring wells were shown to be indicative of the natural geochemistry of site ground water. This work emphasizes the importance of understanding site hydrogeology during the interpretation of ground water quality dat

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00401.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractThe city of Lincoln draws water from a well field along the banks of the Platte River in east‐central Nebraska. We have been able to follow the infusion of atrazine into this well field under induced recharge. Samples of water from the river, several monitoring wells and a production well were analyzed by GC/MS and solid phase extraction and found to change in concentration over the range 0.1 and 5.0 ppb of atrazine through the spring, summer, and fall 1989. Increases in the concentration of atrazine relating to precipitation events in the Platte River Basin were observable in the well water samples and ultimately in Lincoln municipal tap water. Atrazine from the river was seen to move via induced recharge and into well field ground water and away from the river at an observable rate. The concentration of atrazine in the river is dependent upon time of year and precipitation in the river basi

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00402.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY