PC-2009-18, PUD-68, CONTINUING LIFE COMMUNITIES

Resolution No. PC -2009-18 Page Three part of the project. The swale will not be needed once the flood improvements required by the EIR are constructed in Livermore. The project site and land to the east are currently vacant. The City Council approved the Stoneridge Drive Specific Plan amendment which allows for an auto mail and a neighborhood park (with a stormwater flow control basin) east of the site and the Arroyo Mocho and a community park south of the site. Existing residences are west of the site. The 1-580 freeway is north of the site. As conditioned, the project will be designed to minimize impacts on the existing residents and the Arroyo Mocho. The project, as conditioned, is compatible with previously developed properties in the vicinity and adjacent proposed projects, and the natural topographic features of the site. Therefore, this finding can be made. 4. Grading takes into account environmental characteristics and is designed in keeping with the best engineering practices to avoid erosion, slides, or flooding to have as minimal an effect upon the environment as possible. The natural topography of the site is relatively flat. Minimal changes in grades are proposed, with the exception of the filling of an existing drainage swale by the western boundary and the construction of a berm by 1-580. The site is not located within an Alquist-Priolo Earthquake Fault Zone. Slides are not anticipated. The proposed project will require the construction of stormwater detention facilities to contain the 100 -year flood. An EIR mitigation measure for the project requires the site to be removed from the flood hazard area prior to occupancy. Engineering modeling indicates that the implementation of the Livermore flood protection improvements, as part of Livermore's approved EI Charro Specific Plan, will provide sufficient detention to prevent inundation of the Staples Ranch site for the 100 -year storm event. It is anticipated that Livermore will begin the construction of these improvements this year. To help prevent the erosion and pollution of the Arroyo Mocho, on-site stormwater will be treated on-site for contaminates and directed into the stormwater flow control basin on the Staples Ranch Neighborhood Park before being released into the Arroyo Mocho.