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important to the overall assessment of ASR feasibility and effectiveness. These include performance of surface and subsurface storage, a comparison of losses from surface evaporation and subsurface storage, the number and distribution of wells required for a regional ASR system, and estimates of energy costs for operation over the anticipated project life.

As a final comment, the CROGEE notes that the CERP calls for ASR to be implemented in phases. The Committee agrees that phased implementation is an appropriate strategy and strongly recommends a) thorough evaluation of the environmental effects of each incremental increase in scale of ASR, and b) ongoing adaptive assessment of the program.

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