ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00363.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.tb00364.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.tb00365.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.tb00366.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.tb00367.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.tb00368.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.tb00369.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractAt an aviation gasoline spill site in Traverse City, Michigan, historical records indicate a positive correlation between significant rainfall events and increased concentrations of slightly soluble organic compounds in the monitoring wells of the site. To investigate the recharge effect on ground water quality due to infiltrating, water percolating past residual oil and into the saturated zone, an in situ infiltration experiment was performed at the site. Sampling cones were set at various depths below a circular test area, 13 feet (4 meters) in diameter. Rainfall was simulated by sprinkling the test area at a rate sufficiently low to prevent runoff. The sampling cones for soil‐gas and ground water quality were installed in the unsaturated and saturated zones to observe the effects of the recharge process. At the time of the test, the water table was below the residual oil layer. The responses of the soil‐gas and ground water quality were monitored during the recharge and drainage periods, which resulted from the sprinkling.Infiltrated water was determined to have transported organic constituents of the residual oil, specifically benzene, toluene, ethylbenzene, and ortho‐xylene (BTEX), into the ground water beneath the water table, elevating the aqueous concentrations of these constituents in the saturated zone. Soil‐gas concentrations of the organic compounds in the unsaturated zone increased with depth and time after the commencement of infiltration. Reaeration of the unconfined aquifer via the infiltrated water was observed. It is concluded that water quality measurements are directly coupled to recharge events for the sandy type of aquifer with an overlying oil phase, which was studied in this work. Ground water sampling strategies and data analysis need to reflect the effect of recharge from precipitation on shallow, unconfined aquifers where an oil phase may be

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00370.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractCone penetrometer tests and HydroPunch® sampling were used to define the extent of volatile organic compounds in ground water. The investigation indicated that the combination of these techniques is effective for obtaining ground water samples for preliminary plume definition. HydroPunch samples can be collected in unconsolidated sediments and the analytical results obtained from these samples are comparable to those obtained from adjacent monitoring wells. This sampling method is a rapid and cost‐effective screening technique for characterizing the extent of contaminant plumes in soft sediment environments. Use of this screening technique allowed monitoring wells to be located at the plume boundary, thereby reducing the number of wells installed and the overall cost of the plume definition progr

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00371.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

AbstractTwo complementary field sampling methods for the determination of residual aviation gasoline content in the contaminated capillary fringe of a fine, uniform, sandy soil were investigated. The first method featured field extrusion of core barrels into pint‐size Mason jars, while the second consisted of laboratory partitioning of intact stainless steel core sleeves. The barrel extrusion procedure involved jar headspace sampling in a nitrogen‐filled glove box, which delineated the 0.7m thick residually contaminated interval for subsequent core sleeve withdrawal from adjacent boreholes. Soil samples removed from the Mason jars (in the field) and sleeve segments (in the laboratory) were subjected to methylene chloride extraction and gas chromatographic analysis to compare their aviation gasoline content. The barrel extrusion sampling method yielded a vertical profile with 0.10m resolution over an essentially continuous 5.0m interval from the ground surface to the water table. The sleeve segment alternative yielded a more resolved 0.03m vertical profile over a shorter 0.8m interval through the capillary fringe. The two methods delivered precise estimates of the vertically integrated mass of aviation gasoline at a given horizontal location, and a consistent view of the vertical profile as well. In the latter regard, a 0.2m thick lens of maximum contamination was found in the center of the capillary fringe, where moisture filled all voids smaller than the mean pore size. The maximum peak was resolved by the core sleeve data, but was partially obscured by the barrel extrusion observations, so that replicate barrels or a half‐pint Mason jar size should be considered for data supporting vertical transport analyses in the absence of sleeve parti

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1991.tb00372.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY