LOCATION.-- Lat 41°57'52", long 88°24'40" (NAD of 1983), in NW1/4SE1/4NW1/4 sec.11, T.40N., R.7E., Hydrologic Unit 07120007, near Lily Lake. Owner: U.S. Geological Survey.

AQUIFER.-- Glacial drift of Quaternary age.

WELL CHARACTERISTICS.-- Diameter 2.0 inches, depth 38.5 feet, cased to 33.5 feet, slotted screen, drilled, monitoring.

PERIOD OF RECORD.--

GROUND-WATER QUALITY: May 2000, June 2002.