Are there any technical uncertainties?
While most issues have been resolved, some remain. Some of the technologies proposed – such as aquifer storage and recovery and seepage control – are already in use, but have not been implemented on the scale proposed in the Plan. A series of pilot projects will address these uncertainties and help to direct future design and implementation. In addition, scientific and engineering models were used to develop the Plan. Although these models have undergone rigorous peer review, models are only approximations of very complex systems. As we draw conclusions and work towards implementing the Plan, we will recognize the limitations of these models. Additional interagency and independent peer review during the more detailed design of each feature will allow us to make any needed adjustments. Some differences of professional opinion have characterized each step in the evolution of the Plan and indicate a healthy diversity in backgrounds, interest and agency missions. The flexibility and openne
