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Statistical Evaluation of Geochemical Parameter Distribution in a Ground Water System Contaminated with Petroleum Hydrocarbons

^a GeoGreen 21 Co., Ltd., Research Park Innovation Center 412, Seoul National University, Seoul 151-818, Korea
^b School of Earth and Environmental Sciences, Seoul National Univ., Seoul 151-742, Korea
^c Soil Environment Division, National Institute of Environmental Research, Incheon City, Korea

View larger version (38K): [in a new window]   Fig. 1. Location of the study site, and the layout of the monitoring wells and the piezometers. The location of the petroleum hydrocarbon storage tanks is also shown.

View larger version (26K): [in a new window]   Fig. 2. Hydrogeologic section showing vertical well locations and screen intervals. Locations of the wells are not aligned in the straight line.

View larger version (54K): [in a new window]   Fig. 3. Ground water level contours for (a) May 1999 and (b) September 1999. Numbers indicate ground water levels above mean sea level in meters.

View larger version (57K): [in a new window]   Fig. 4. Distribution of total toluene, ethylbenzene, and xylene (TEX) concentrations in ground water for (a) May 1999 and (b) September 1999. Units are mg/L.

View larger version (31K): [in a new window]   Fig. 5. Changes in the geochemical parameters between May and September 1999 at monitoring wells along the main direction of ground water flow.

View larger version (18K): [in a new window]   Fig. 6. Piper plots showing major chemical compositions of the ground waters for (a) May and (b) September 1999.

View larger version (20K): [in a new window]   Fig. 7. Plot of alkalinity versus calcium with 1:1 alkalinity–Ca line (dotted).

View larger version (42K): [in a new window]   Fig. 8. Areal distribution of factor scores for Factor 1 for May.

View larger version (17K): [in a new window]   Fig. 9. Dendrograms formed using factor scores for (a) May 1999 and (b) September 1999.

View larger version (58K): [in a new window]   Fig. 10. Results of the clustering for (a) May and (b) September 1999.