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DESCRIPTION:

Latitude 41°39'42",   Longitude 87°32'56"   NAD27
Cook County, Illinois   , Hydrologic Unit 04040001

Well depth: 20 feet
Hole depth: 20 feet
Land surface altitude: 584 feet above NGVD29.
Well completed in "Sand and gravel aquifers (glaciated regions)" (N100GLCIAL) national aquifer.
Well completed in "Equality Formation-Dolton Member" (112EQLD) local aquifer

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Field groundwater-level measurements	1992-05-27	1993-06-22	2
Field/Lab water-quality samples	1993-06-22	1993-06-22	1
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