HYDROLOGY - 9/4/2009, 7:15:47 AM-JWD

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Centennial Project - Section 33 Pumping Test Plan 8 September 2009 Powertech (USA) Inc. All tanks and piping will be fully fenced to keep livestock and wildlife away from the • temporary infrastructure associated with the pumping test. Produced Water Disposal At the conclusion of the aquifer test, all waters produced from the step-rate and primary pumping tests will be re-injected back into the same formation from which it was extracted. Powertech is currently seeking authorization for water injection through the Environmental Protection Agency's (EPA) Underground Injection Control (UIC) program, utilizing a Class V permit. A requirement of the Class V permit is that Powertech demonstrates that there is no potential for hydrogeologic communication with overlying Underground Sources of Drinking Water (USDW), in this case the Laramie Formation, through the injection well and its annular space. Powertech will demonstrate injection well integrity by performing a pressurized mechanical integrity test (MIT). Water will be routed from the Baker Tanks to a transfer pump and then to the injection well head. Based upon current information, it is not expected that the well head will be operated under pressure. However, the well head will be sealed to allow use of the transfer pump to pressure the system if necessary. Pressure and flow rate will be monitored at the well head. There will be a flow control valve or adjustable speed drive on the transfer pump to regulate flow and pressure to the injection well head. The maximum operating injection pressure will be kept below a limit based upon the results • of the mechanical integrity test performed on the injection well casing and/or requirements of the EPA permit, whichever is lower. Should the operating pressure approach this limit, injection flow will be decreased or shut down so that the limit is not exceeded. Due to the expected short duration of the test, all piping will be placed upon the ground surface and will be secured and fenced. 8.0 SITE SECURITY and MONITORING Site Security Throughout the entire duration of the step-rate and primary aquifer pumping tests Powertech personnel will be onsite to provide site security 24 hours each day. Powertech will provide a camper so the onsite personnel can be comfortable and not be exposed to the weather elements. In addition, the entrance to the lands in which the aquifer test will take place will be locked and secured. During re-injection of the produced aquifer test water Powertech personnel will conduct site security inspections every 4 hours between the hours of 8:00 AM and 8:00 PM, 7 days each week. In addition, coordination will be made with the Nunn Police Department to be available to conduct security inspections during the late hours of the night. The entrance to the lands in which the re-injection will take place will always be locked and secured. CJ