In accordance with Sec. 144.7(b) and Sec. 146.4 of this chapter, the aquifers described in the following table are hereby exempted from the definition of an underground source of drinking water, as defined in 40 CFR 144.3:
Aquifer Exemptions Since January 1, 1999------------------------------------------------------------------------
Approximate depth
Formation (feet below Location
ground surface)------------------------------------------------------------------------Powder River Basin, only 3,800-6,800...... Two cylindrical
approximately 0.4 square volumes with centers
miles of the Lance Formation in the wells COGEMA
which is less than 0.005% of DW No. 1 and 18-3
the Basin at indicated depths Christensen
and location.. respectively, and
radius of 1,320
feet. Both wells are
located in the
Christensen Ranch,
in Johnson County,
WY. The COGEMA DW
No. 1 well is
located at
approximately 450
feet West of N/S
line and 100 feet
North of E/W line of
SE/4, NW/4, Section
7, T44N, R76W. The
18-3 Christensen
well is located
approximately 600
feet West of N/S
line and 550 South
of E/W line of NE/4,
NW/4, Section 18,
T44N, R76W.Lance Formation at indicated 3,800-6,500...... Two cylindrical
depths and locations. volumes with centers
in the wells COGEMA
DW No. 2 and COGEMA
DW No. 3
respectively, and
radius of 1320 feet.
Both wells are
located in the
Christensen Ranch,
in Johnson County
WY. The COGEMA DW
No. 2 is located at
approximately 2,290
feet from the North
line and 1130 feet
from the East line
SW1/4 SE1/4 NE1/4 of
Section 7, Township
44 North, Range 76
West. The COGEMA DW
No. 3 is located
approximately 3300
feet from the North
line and 1340 feet
from the West line
center of SW1/4 of
Section 5, Township
44 North, Range 76
West.------------------------------------------------------------------------ [64 FR 14803, Mar. 26, 1999, as amended at 67 FR 47726, July 22, 2002]
Subpart AAA_Guam