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DESCRIPTION:

Latitude 41°43'40",   Longitude 87°34'32"   NAD27
Cook County, Illinois   , Hydrologic Unit 07120003

Well depth: 21 feet
Hole depth: 21 feet
Land surface altitude: 603.15 feet above NGVD29.
Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer.
Well completed in "Niagaran Series" (355NIGR) local aquifer

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Field groundwater-level measurements	1992-06-23	1992-06-23	1
Field/Lab water-quality samples	1993-06-17	1993-06-17	1
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