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DESCRIPTION:

Latitude 41°30'02",   Longitude 87°33'55"   NAD27
Cook County, Illinois   , Hydrologic Unit 07120003

Well depth: not determined.
Land surface altitude: 633 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/Lab water-quality samples	1987-04-29	1987-04-29	1
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