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DESCRIPTION:

Latitude 41°29'12",   Longitude 87°43'01"   NAD27
Cook County, Illinois   , Hydrologic Unit 07120003

Well depth: 0439 feet
Hole depth: 439 feet
Land surface altitude: 711 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	1968-03-25	1985-05-30	14
Field/Lab water-quality samples	1985-05-30	1986-12-12	2
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