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Potentially Less Than Less Than Analyzed Si nificant Significant with Si nificant No In The 9 Mitigation g Impact Incorporated Impact Impact Prior EIR X. HYDROLOGY AND WATER QUALITY. Would the project: a) Violate any water quality standards or waste discharge requirements or otherwise substantially ❑ ❑ ❑ ❑ degrade surface or ground water quality? b) Substantially decrease groundwater supplies or interfere substantially with groundwater recharge ❑ � � ❑ ❑ such that the project may impede sustainable groundwater management of the basin? c) Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river or through the El ❑ 11addition of impervious surfaces, in a manner which would: i) result in substantial erosion or siltation on-or off- ❑ ❑ ❑ X F1site; ii) substantially increase the rate or amount of surface runoff in a manner which would result in ❑ ❑ ❑ flooding on-or off-site; iii) create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide ❑ ❑ ❑ ❑ substantial additional sources of polluted runoff; or iv) impede or redirect flood flows? ❑ ❑ ❑ I'ki F] d) In flood hazard, tsunami, or seiche zones, risk ❑ ❑ El � 11release of pollutants due to project inundation? e) Conflict with or obstruct implementation of a water quality control plan or sustainable groundwater F1 El 1:1 ❑ management plan? Impact Discussion: a-b) The proposed project is a General Plan Map Amendment and Zone Reclassification that does not propose any development within the scope of the application. If the application is approved, the parcels will be rezoned Residential Medium Density. Any future development of the parcels will be residential and will receive water service through a public water system therefore, no impact on groundwater is anticipated. c) The proposed project is a General Plan Map Amendment and Zone Reclassification that does not propose any development within the scope of the application. For any future development of the project site, any necessary drainage improvements will be required as conditions of the construction and grading will be performed under permit from the Building Department. d-e) The project site is not in a tsunami or seiche zone. The site is located in an `x(500)' flood designation area, which is defined as areas of 0.2% annual chance (500-year) flood. Therefore, there is little risk of release of pollutants due to inundation. The project itself, a General Plan Map Amendment and Zone Reclassification, if approved, will not result in an increase to surface, channel or stream volumes, or alterations to drainage patterns or streams, nor will it result in PA-1900031 and PA-1900037—Initial Study 18