Ord 2014-015/amending various Sections of the Land Development Code as follows: amending Chapter 1, Article 6 by establishing a two year expiration date for permits approving Public Improvements Construction plans; amending Chapter 1, Article 8 by allowin

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separete watef quality pond is fiat Fequifed, the fate of Funeff sha4i be eamputed en both a twe year- and a 25 yeaf peak ster+n flew using the City of Austin Drainage Gr-iter-ia omputation of the rate of runoff shall be based on an assumption of a fully developed contributing drainage area or watershed. (c) Waiver of Detention. Detention will be waived for single - family residential and small projects with less than 5,000 square feet of impervious cover, including buildings, parking lots and sidewalks. Runoff from development shall be discharged as sheet flow through grass areas to reduce peak runoff rates and provide for filtering of sediments prior to exiting property. (d) Low Impact Development Practices as described in the City of San Marcos Stormwater Technical Manual may be used to reduce the impact of runoff on the natural and built drainage system. SECTION 8. Chapter 5, Environmental Regulations, Article 1, General Provisions, Section 5.1.1.6, Street and Drainage Improvements, subsection (b) is amended by amending subsection (2) and adding a new subsection (3) to read as follows: (2) Drainage easements must be at least 25 feet five inehes in width for open drainage systems, or 15 feet in width for enclosed drainage systems. (3) Detention and water quality ponds shall be designed to avoid the need for fencing when possible. When the need for fencing g annot be avoided, the fencing shall be designed to and utilize materials that complement any associated building structure and the project site. Ornamental fencing, includin wrought iron wooden or masonry fencing may be erected along steep side slopes or changes in grade only for safety purposes, but may not be erected around the entire pond. Chain link fencing, however, is prohibited. Detention and water quality ponds and facilities must otherwise comply with the design standards set forth in the City of San Marcos Stormwater Technical Manual, including requirements for location, screening and fencing not inconsistent with this Chapter and applicable ordinances. SECTION 9. Chapter 5, Environmental Regulations, Article 2, Development Related to the Edwards Aquifer, Section 5.2.4.1, Requirements and Standards for BMP's, subsection (b), is amended to read as follows: (b) Installation of BMPs. If impervious cover at the site of a development in the recharge zone equals or exceeds 15 percent on the approved Watershed Protection Plan (Phase 1, Phase 2, or Qualified) for the development, permanent BMPs must be installed in accordance with the approved Watershed Protection Plan (Phase 1, Phase 2, or Qualified) in order to mitigate the water quality impacts of the development. The permanent BMPs must limit the increase