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Mountain House Spedrfic Plan III ........................................................................................................................................................................... Outfalls to the improved Mountain House Creek channel were constructed as part of the Specific Plan I project by Trimark. Existing trunk storm drain lines in Central Parkway and DeAnza Boulevard that L" ultimately drain to Mountain House Creek are"stubbed"to the south side of Mascot Boulevard to accept runoff from the southerly areas of the project,Neighborhoods A through D,which includes all of the L Specific Plan III area. Therefore, Specific Plan III does not contemplate further improvements to Mountain House Creek. r.. 15.5.3 Implementation Measures None. 15.6 Best Management Practices 15.6.1 Master Plan Summary The Master Plan requires that the storm drain system be designed to reduce the quantity of storm water pollutants as close to the point of origin as possible,and to incorporate cost effective Best Management Practices(BMP)treatment processes. To this end,site specific and regional treatment BMP's shall be incorporated into the design of all improvements including all structures and infrastructure. 15.6.2 Specific Plan III Description A water quality control pond is proposed for the developments within Neighborhood A/B area.The proposed pond will be located at the southwest comer of the intersection of Grant Line Road and Central Parkway. This will be an area-wide facility for the western watershed. Existing Water Quality Basin WQB 1 north of Byron Road treats runoff from Neighborhoods B and D, the areas that drain to DeAnza Boulevard and Mountain House Parkway. L In addition,per the requirements of the MHCSD Storm Water Master Plan,Manual for Best Management _ Practices and applicable ordinances,all private property runoff from non-residential areas will be pretreated on-site prior to discharge into the MHCSD public storm water collection system. All such non- residential users will be required to demonstrate compliance with all applicable MHCSD requirements as part of building permit issuance. 15.6.3 Implementation Measures a. All implementing projects shall comply with the applicable provisions of the MHCSD Development Standards. Draft 03/14/05 15-7 ...........................................................................................................................................................................