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DESCRIPTION:

Latitude 41°49'10",   Longitude 87°55'20"   NAD27
Dupage County, Illinois   , Hydrologic Unit 07120004

Well depth: 320 feet
Hole depth: 325 feet
Land surface altitude: 645 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	1970-11-25	1979-09-07	4
Field/Lab water-quality samples	1985-09-03	1985-09-03	1
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