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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 8. Statistical summary and U.S. Environmental Protection Agency drinking-water standards
for selected trace elements in water from 30 monitoring wells in areas of recent residential and
commercial development, Wichita, Kansas, 2000

[<, less than; --, not applicable; MCL, Maximum Contaminant Level; SMCL, Secondary
Maximum Contaminant Level; HAL, lifetime Health Advisory Level]

Trace Element Number of
samples 		Concentration
(micrograms per liter)
 Minimum  Median  Maximum		 Drinking-water
standard
(micrograms per
liter)
Aluminum 30 <1 10  22 --
Antimony 30 <1 <1   <2       ¹6 (MCL)
Arsenic 30      <.9      <.9  13      ²10 (MCL)
Barium 30 72 175 350 ¹2,000 (MCL)
Beryllium 30 <1   <1   <2       ¹4 (MCL)
Cadmium 30 <1   <1   <2       ¹5 (MCL)
Chromium 28     <.8      <.8     1    ¹100 (MCL)
Cobalt 30 <1   <1    10 --
Copper 30 <1   <1     3 ¹1,300 (MCL)
Iron 30 <10    <10 3,700      ¹300 (MCL)
Lean 30 <1   <1    <2     ¹15 (MCL)
Manganese 30 <1    30 1,000      ¹50 (SMCL)
Molybdenum 30 <1    2    12 --
Nickel 30   1    3    11    ¹100 (HAL)
Selenium 30      <.7    2    11      50 (MCL)
Silver 30 <1   <1    <2   ¹100 (SMCL)
Uranium, natural 30 <1     2    76    ³300 (MCL)
Zinc 30 <1     3      9 ¹5,000 (SMCL)

                      ¹U.S. Environmental Protection Agency (2000a).
                      ²U.S. Environmental Protection Agency (2001a).
                      ³U.S. Environmental Protection Agency (2000b).

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