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Pimlico Drive Turnout and Pipeline Project Environmental Checklist <br />Less than <br />Potentially Significant Less than <br />Significant with Mitigation Signifiaurt Au <br />ISSUCS Impact Incorporated Impact Impact <br />Hydrology and Water Quality <br />Would the project: <br />a) Violate any water quality standards or waste ~ ~ l <br />discharge requirements'? <br />b) Substantially deplete groundwater supplies or ~ ~ ~X <br />interfere substantially with groundwater <br />recharge such that there would be a net deficit in <br />aquifer volume or a lowering of the local <br />groundwater table level (e.g., the production rate <br />ofpre-existing nearby wells would drop to a <br />level which would not support existing land uses <br />or planned uses for which pernrits have been <br />granted)? <br />c) Substantially alter the existing drainage pattern ~ ~ ~X <br />of the site or area, including through the <br />alteration of the course of a stream or river, in a <br />manner which would result in substantial <br />erosion or siltation on- or off-site`? <br />d) Substantially alter the existing drainage pattern ~ ~ ~X <br />of the site or area, including through the <br />alteration of the course of a stream or river, or <br />substantially increase the rate or amount of <br />surface runoff in a manner which would result <br />in flooding on- oroft=site`? <br />e) Create or contribute nmoff water which would ~ ~ ~X <br />exceed the capacity of existing or planned <br />stormwater drainage systems or provide <br />substantial additional sources of polluted <br />runoff? <br />f) Otherwise substantially degrade water quality'? ~ ~ ~X <br />g) Place housing within a 100-year flood hazard ~ ~ ~ ~X <br />area as mapped on a federal Flood Hazard <br />Boundary or Flood Insurance Rate Map or other <br />flood hazard delineation map? <br />City of Pleasanton 35 Winzler & Kelly <br />Draft Initial Study/Proposed Negative Declaration August 2006 <br />04263501 <br />