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Mountain House Community Services District Design Manual 2002 <br /> There are no measures or standards identified in the Mountain House Community Services District Design <br /> Manual applicable to water quality. <br /> SIGNIFICANT IMPACTS IDENTIFIED IN THE MOUNTAIN HOUSE MASTER PLAN AND SPECIFIC PLAN I <br /> FINAL EIR <br /> The MHMP EIR identified the following significant surface water quality impacts before mitigation associated <br /> with implementation of the MHMP: <br /> r Water quality problems associated with inadequate water circulation in the proposed on-site marina resulting <br /> from long residence time and low flow velocity[no longer relevant], <br /> Impacted water quality in Old River resulting from construction of proposed marina [no longer relevant], <br /> Sediment load transported by Mountain House Creek that could have interfered with flood control and <br /> enhanced habitat function of the Mountain House Creek corridor[no longer relevant]. <br /> The marina proposed in the MHMP was not associated with the College Park at Mountain House Specific Plan III <br /> area and is not applicable to this water quality analysis. The MHMP EIR did not identify any significant surface <br /> water quality impacts after mitigation(i.e., significant unavoidable water quality impacts)associated with <br /> implementation of the MHMP or development of the College Park at Mountain House Specific Plan III area. <br /> 4.8.3 SIGNIFICANCE THRESHOLDS <br /> The proposed project would result in significant surface water quality impacts if it would: <br /> violate any water quality standards or waste discharge requirements; <br /> substantially alter the existing drainage pattern of the site or area, including through alteration of the course of <br /> a stream or river, in a manner that would result in substantial on-site or off-site erosion or siltation that could <br /> adversely affect water quality; <br /> create or contribute runoff water that would provide substantial additional sources of polluted runoff; or <br /> otherwise substantially degrade water quality conditions. <br /> 4.8.4 IMPACT ANALYSIS <br /> ANALYSIS METHODOLOGY <br /> The environmental analysis reflects independent evaluation of potential project-related water quality effects of the <br /> proposed project. Short-term construction effects on water quality were evaluated qualitatively based on type, <br /> extent,duration, and timing of proposed construction activities and environmental factors, such as location with <br /> respect to sensitive water resources,topography,and climate.A numerical estimation procedure described below <br /> was used to evaluate potential changes in stormwater drainage quality characteristics resulting from conversion of <br /> the area from rural to urban land uses. <br /> With the proposed project,land uses on the project site would change from agricultural and undeveloped land <br /> uses to residential, commercial, and industrial development. Consequently,drainage conditions and constituents <br /> of runoff would likely change considerably with development of the project site. Speck Plan III Amendment to <br /> College Park at Mountain House Specific Plan III Draft EIR EDAW <br /> San Joaquin County 4.8-9 Water Quality <br />