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DESCRIPTION:

Latitude 42°00'12",   Longitude 88°07'10"   NAD27
Cook County, Illinois   , Hydrologic Unit 07120004

Well depth: 0250 feet
Hole depth: 250 feet
Land surface altitude: 826 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	1966-12-30	1979-08-14	3
Field/Lab water-quality samples	1985-08-20	1985-08-20	1
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