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DESCRIPTION:

Latitude 41°39'28",   Longitude 87°35'22"   NAD27
Cook County, Illinois   , Hydrologic Unit 07120003

Well depth: 58 feet
Hole depth: 58 feet
Land surface altitude: 590 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	1991-05-06	1997-07-09	4
Field/Lab water-quality samples	1993-06-15	1993-06-15	1
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