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generated as a consequence of the SMRC development for which a basin is <br />designed as approved by the Engineering Director in accordance with the City of <br />San Marcos Stormwater Technical Manual GentaFainaRt Removal Guideiines of <br />the City of San Mar-e These basins shall be maintained at all times in <br />accordance with section 5.1.1.7 so that efficient removal of the contaminants is <br />continuous. <br />(g) Disposal of Contaminants. Disposal of removed or filtered <br />contaminants shall be as approved by the Engineering Director in accordance with <br />the Contaminant Removal Guidelines of the City of San Marcos. <br />(h) Input to and Release from Basins. Input to and release from water <br />quality basins shall utilize grass -lined swales and/or overland flow dispersion <br />measures. <br />SECTION 11. Chapter 7, Public Facilities Standards, Article 5, Drainage, Section <br />7.5.1.1, System Drainage Requirements, subsection (g), is amended to read as follows: <br />(g) Layout Should Use Natural Contour Lines. In order to help reduce <br />storm water runoff, and resulting erosion, sedimentation and conveyance of <br />nonpoint source pollutants, the layout of the street network, lots and building sites <br />shall, to the greatest extent possible, be sited and aligned along natural contour <br />lines, and shall minimize the amount of cut and fill on slopes in accordance with <br />the standards for cut and fill set forth in Section 5.1.1.2 (including the limitations <br />on and procedures for variances under Section 5.1.1.20)) in order to minimize the <br />amount of land area that is disturbed during construction. <br />SECTION 12. Chapter 7, Public Facilities Standards, Article 5, Drainage, Section <br />7.5.1.2, Velocity Attenuation and Surface Drainage Channels, subsection (b), is amended to read <br />as follows: <br />(b) Surface Drainage Channels Surface drainage channels shall be <br />designed to minimize potential erosion and to increase the bottom width to flow <br />depth ratio as follows: Channel cross sections shall be trapezoidal in <br />configuration. <br />(1) Side slopes of channels shall be no steeper than four horizontal to <br />one vertical. <br />{�2 All constructed and altered drainage channels shall be stabilized <br />and vegetated as soon as practicable after final grading. <br />