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gophers and ground squirrels in the immediate green areas through the use of burrow fumigants instead of transferable poisons. It should be noted that the Integrated Pest Management Plan eluded to in the Buckeye Ranch Management Plan would not appear to apply to rodent control since such plans normally rely on the introduction of natural predators for control. In this case, several species of natural predators are already resident on the site (red-tail hawk, Swainson's hawk, great horned owl, coyote, etc.). 4-13-1(g) Eliminate all cattle grazing on the entire project site and institute the Muick grassland restoration plan (with the exception of sheep grazing) throughout the present grassland and oak savanna area outside of the suggested North Tracy Lake development area. This enhancement would greatly increase the rodent productivity of approximately two thirds of the grassland habitat currently present on the site and, in the opinion of the EIR biologist, would adequately offset the loss of the present foraging area which the development of the North Tracy Lake area would produce. It should be noted that sheep grazing should not be allowed because this animal will denude the grassland habitat, thereby negating the positive effects of the restoration plan as stated above. Impact 4.13-2 A portion of the oak savanna and Swainson's hawk foraging habitat would be eliminated. This is a secondary impact of Mitigation Measure 4.13-1(a)suggested above. It would occur in the northwest portion of the project site which has been recommended for development,thereby retaining the more valuable habitat. The following mitigation measures would offset this secondary impact. Mitigation Measure 4.13-2(a) Adopt the Scottish-style golf course concept and maintain the fairways in the restored grassland state proposed and described in the Buckeye Ranch Management Plan. This would preserve approximately one-third of the present potential Swainson's hawk foraging habitat in this area. This area would be preserved in an enhanced state in which the rodent production on the fairways could exceed that presently occurring over the entire alternative development area. It should be noted that whereas the Swainson' hawk is readily disturbed on its nesting sites by human presence, this refectory behavior does not appear to extend beyond the nesting territory to foraging sites. 4.13-2(b) Apply the grassland restoration plan to the greater South Tracy Lake area as suggested in Mitigation Measure 4.13-1(g). The greater rodent production resulting from such a restoration would again serve to offset the losses by the development of the northwest portion of the site. 4.13-3(c) Incorporate all mitigation measures proposed for the protection of native trees on the site (4.13-4a&b). This would insure that the mature, scenic oaks and buckeye trees of the northwest savanna area are not lost. 27