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DESCRIPTION:

Latitude 42°05'51",   Longitude 88°02'51"   NAD27
Cook County, Illinois   , Hydrologic Unit 07120004

Well depth: 1950 feet
Hole depth: 1950 feet
Land surface altitude: 732.00 feet above NGVD29.
Well completed in "Cambrian-Ordovician aquifer system" (S300CAMORD) national aquifer.
Well completed in "Ordovician-Cambrian Systems" (367OVCB) local aquifer

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Field groundwater-level measurements	1971-07-14	1971-07-14	1
Field/Lab water-quality samples	1971-07-01	1981-03-10	4
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