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Mr. Peter MacNicholl <br /> 6/12/2007 <br /> Page 4 <br /> Section 3. <br /> 1. Section 3.3, dot 6. This item should be reviewed in light of the above discussion <br /> of recharge. <br /> 2. Section 3.3, dot 7. Note that there is at least one known breach in the Corcoran <br /> within the model domain, in the Annex area where an agricultural well collapsed. <br /> It is possible that there is still some damage to the deep aquitard present at this <br /> location. <br /> 3. Section 3.4.0.3 The hydrograph for MW-5 (shallow) in Appendix A shows an <br /> increase, then a decrease in water level during pumping from the Corcoran , <br /> which suggests that, despite the conclusion in the report, there is a small amount <br /> of vertical leakance that occurs after the initial matrix pressure issues sort <br /> themselves out. While the Corcoran in general forms an extensive aquitard, it <br /> may still be breached in places. Since a breach can be simulated as a source or <br /> sink, this is not a critical problem for the model, but the possibility should be left <br /> open for future improvements. Some discussion of how this would be addressed <br /> would be welcome. <br /> 4. Section 3.4.1 The volume of Flow through each boundary (inflow and outflow) <br /> should be hand-checked (using Darcy's law) for reasonableness within the <br /> context of the overall water budget. Please provide a table indicating total <br /> boundary inflow and outflow for each category in this section. <br /> 5. Section 3.4.1.7 The recharge rates should be checked in the southern area of <br /> Fig. 2-6 to make sure they reflect conditions shown in the section. <br /> 6. Section 3.4.1.12. The hydrographs suggest there are substantial pumping <br /> impacts on the Upper Tulare Aquifer. This section needs to be revised in <br /> conjunction with the hydrograph discussion. In addition, recharge from rainfall <br /> needs to be assigned to the following, not the current year in the model. (A few <br /> areas might need to have it spread out over two years, based on hydrographs.) <br /> However, pumping needs to be in the current year. <br /> 7. Section 3.4.2.6. Summarize aquifer tests (number, well, range of values, model <br /> unit, etc.) somewhere in an appendix, and include locations on a map so the <br /> spatial coverage of aquifer tests can be quickly discerned. <br /> 8. This section should include a summary table with the general water budget items <br /> presented by category. <br />