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DESCRIPTION:

Latitude 41°43'16.65",   Longitude 87°31'31.34"   NAD27
Cook County, Illinois   , Hydrologic Unit 04040001

Well depth: 68 feet
Hole depth: 68 feet
Land surface altitude: 591 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	2015-01-15	13
Field/Lab water-quality samples	1993-06-23	1993-06-23	1
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