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DESCRIPTION:

Latitude 41°42'17",   Longitude 87°59'28"   NAD27
Dupage County, Illinois   , Hydrologic Unit 07120004

Well depth: 140 feet
Hole depth: 140 feet
Land surface altitude: 733.0 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	1948-09-15	1998-09-18	2797
Field/Lab water-quality samples	1993-08-04	1993-08-04	1
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