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Centennial Project - Section 33 Pumping Test Plan 7 <br />September 2009 Powertech (USA) Inc. <br />The pumping well will be started and maintained at a constant rate for an estimated <br />period of 3 to 6 days. As noted, the pumping rate will be determined based on the <br />results of the step-rate test. <br />Barring unexpected variations in hydrogeologic properties, a minimum drawdown 0.2 <br />feet with a `cause and effect' relationship will be considered "significant" with respect to <br />demonstration of hydraulic connection between the pumping well and the production <br />zone monitoring wells. At the end of the pumping period, monitoring will continue until <br />80 to 90 percent recovery is achieved. <br />Conventional analytical techniques (i.e., log-log, semi-log, and distance-drawdown <br />methods developed by Theis, Jacob, and Cooper and Jacob, respectively) will be used <br />to evaluate the response of the aquifer to pumping and to assess the hydraulic <br />characteristics of the A2 production zone. Theis recovery analyses will be performed on <br />the pumping well, and if necessary, on some of the monitoring wells. Other analytical <br />methods (e.g., Hantush, Neuman, etc.) will be employed for the monitoring wells if <br />warranted. The analyses will be performed using the Aquifer Test software package <br />(Waterloo Hydrogeologic, Inc.). <br />Following the conclusion of the field activities and data analysis, a report that fully <br />discusses the pump test objectives, procedures, and results will be prepared. The <br />report will include discussion of monitoring well installation procedures and geologic <br />data; background water-level trends; hydrogeologic characteristics of the ore zone (A2 <br />• Horizon); water-level responses in the A2 Production Zone; and responses in the <br />overlying and underlying aquifers, if any. <br />7.0 PRODUCED WATER MANAGEMENT and DISPOSAL <br />Produced Water Containment <br />Groundwater produced during the step-rate and primary aquifer pumping test will be <br />totally contained onsite within several "Baker" mobile storage tanks, each with a 500 <br />barrel holding capacity. Initially four Baker tanks will be staged onsite in a <br />topographically flat area located just down gradient from the pump well providing 84,000 <br />gallons of holding capacity. This number is sufficient to contain the estimated fluid that <br />will be produced from both the step-rate and primary pump test. After performing the <br />step rate test, if it is determined that additional tanks may be needed to hold all the fluid <br />produced from the primary pump test, they will be brought onsite and ready for use <br />before start of the pumping test. The Baker style tanks will be decontaminated before <br />and after their use. <br />Produced water will be piped above ground from the pumping well to a manifold that will <br />allow filling of the tanks without interruption of the well flow. Valving on the manifold will <br />allow switching of the tanks as needed and the filling of more than one tank <br />simultaneously. Pressure, flow rate, and tank levels will be monitored during the test. <br />0 <br />ffhemi *