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U.S. Geological Survey
Water-Resources Investigations Report 02-4228
Prepared as part of the
NATIONAL WATER-QUALITY ASSESSMENT PROGRAM

Quality of Shallow Ground Water in Areas of Recent Residential and Commercial Development, Wichita, Kansas, 2000

Table 10. Statistical summary and U.S. Environmental Protection Agency (2000a) drinking-water standards for
volatile organic compounds detected in water from 30 monitoring wells in areas of recent residential and
commercial development, Wichita, Kansas, 2000

[MCL, Maximum Contaminant Level; <, less than; E, estimated; --, not applicable]

Volatile organic compound Number of
samples 		Number of
detections 		Concentration
(micrograms per liter)
 Minimum  Median  Maximum		 Drinking-water
standard
(micrograms per
liter)
1,1,1-Trichloroethane 30    2 <0.032 <0.032 E0.06 200 (MCL)
Bromodichloromethane 30    2   <.048   <.048    .12   80 (MCL)
Chloroform 30    7   <.052   <.052   1.7   80 (MCL)
Tetrachloroethylene 30    4 <.1    <.1      9.0   5.0 (MCL)
Toluene 30    1 <.05 <.05    .15   1,000 (MCL)
Trichloroethylene 30    2   <.038   <.038    .26   5.0 (MCL)
cis-1,2-Dichloroethylene 30    2   <.038   <.038   E.08   70 (MCL)
tert-Butyl methyl ether (MTBE) 30    2 <.17 <.17    .47   --

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