40 CFR 147.2555 - Aquifer exemptions since January 1, 1999.

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§ 147.2555 Aquifer exemptions since January 1, 1999.
In accordance with § 144.7(b) and § 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
Formation Approximate depth (feet belowground surface) Location
Powder River Basin, only approximately 0.4 square miles of the Lance Formation which is less than 0.005% of the Basin at indicated depths and location. 3,800-6,800 Two cylindrical volumes with centers in the wells COGEMA DW No. 1 and 18-3 Christensen 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 depths and locations 3,800-6,500 Two cylindrical 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]

Title 40 published on 2014-07-01

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