(smile face) S. of Minooka, Aux Sable Township, Grundy County, IL. Ridge Rd. S. 4.0 miles from jct with I80 exit 122 on the NW side of Minooka, W. on Hansel Rd. 0.6 miles to the tanks on the N. side of the road at Dollinger Farms. (7-16-04, N41° 24.210', W88° 16.830')