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DESCRIPTION:

Latitude 42°07'54",   Longitude 87°55'20"   NAD27
Cook County, Illinois   , Hydrologic Unit 07120004

Well depth: 0281 feet
Hole depth: 281 feet
Land surface altitude: 642.00 feet above NGVD29.
Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer.
Well completed in "Silurian System" (350SLRN) local aquifer

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Field groundwater-level measurements	1963-09-01	1984-11-27	4
Field/Lab water-quality samples	1984-05-09	1985-04-11	4
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