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12 ATTACHMENTS
City of Pleasanton
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CITY CLERK
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2009
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102009
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12 ATTACHMENTS
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10/16/2009 11:21:06 AM
Creation date
10/14/2009 3:03:36 PM
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CITY CLERK
CITY CLERK - TYPE
STAFF REPORTS
DOCUMENT DATE
10/20/2009
DESTRUCT DATE
15 Y
DOCUMENT NO
12 ATTACHMENTS
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Hacienda Mixed Use Rezoning Initial Study <br /> Less Than <br /> Potentially Significant with Less Than No <br /> Significant Mitigation Significant Impact <br /> Impact Incorporation Impact <br /> 8. Hydrology and Water Quality Would the project: <br /> a) Violate any water quality standards or waste discharge X <br /> requirements? <br /> b) Substantially deplete groundwater supplies or interfere X <br /> substantially with groundwater recharge such that there <br /> would be a net deficit in aquifer volume or a lowering of the <br /> local groundwater table level (e.g., the production rate of pre- <br /> existing nearby wells would drop to a level which would not <br /> support existing land uses or planned uses for which permits <br /> have been granted)? <br /> c) Substantially alter the existing drainage pattern of the site X <br /> or area, including through the alteration of the course of a <br /> stream or river, in a manner which would result in substantial <br /> erosion or siltation on- or off -site? <br /> d) Substantially alter the existing drainage pattern of the site X <br /> or area, induding through the alteration of the course of a <br /> stream or river, or substantially increase the rate or amount of <br /> surface runoff in a manner which would result in flooding <br /> on- or off -site? <br /> e) Create or contribute runoff water which would exceed the X <br /> capacity of existing or planned stormwater drainage systems <br /> or provide substantial additional sources of polluted runoff? <br /> 0 Otherwise substantially degrade water quality? X <br /> g) Place housing within a 100 -year flood hazard area as X <br /> mapped on a federal Flood Hazard Boundary or Flood <br /> Insurance Rate Map or other flood hazard delineation map? <br /> h) Place within a 100 -year flood hazard area structures which X <br /> would impede or redirect flood flows? <br /> i) Expose people or structures to a significant risk of loss, X <br /> injury or death involving flooding, including flooding as a <br /> result of the failure of a levee or dam? <br /> j) Inundation by seiche, tsunami, or mudflow? X <br /> Environmental Setting <br /> All three project sites are currently located in a 500 -year flood zone and are within the Del Valle Dam <br /> Inundation Area as shown on Figures 5 -7 and 5 -8, respectively, of the Public Safety Element of the <br /> proposed Pleasanton General Plan. <br /> Significance Criteria <br /> The impact questions above constitute the significance standard for this environmental topic. <br /> Discussion of Checklist Items <br /> Less than Significant Impacts. The proposed zone change would not cause any hydrology or water <br /> c}ualit impacts. <br /> Draft, Subject to Revision 17 8/31/2009 <br />
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