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EXHIBIT A: EXISTING CHAPTER 927 927.07 STREETS, UTILITIES AND PUBLIC SERVICES CODE 66N (k) Methods for controlling increases in stormwater runoff peaks and volumes shall be proposed that may include but are not limited to: (1) Retarding flow velocities by increasing friction; for example, grassed road ditches rather than paved street gutters where practical, low density development areas, access roads, etc.; or grass- and rock -lined drainage channels; (2) Grading and construction of terraces and diversions to slow runoff and use of grade control structures to provide a level of control in flow paths and streamgradients; (3) Induced infiltration of increased stormwater runoff into the soil where practical; for example, constructing special infiltration areas where soils are suitable; retaining topsoil for all areas to be revegetated; or providing good infiltration areas withproper emergency overflow facilities; and (4) Provisions for detention and retention; for example, permanent ponds and lakes with stormwater basins provided with proper drainage, multiple use areas for stormwater detention and recreation, wildlife, transportation, fire protection, aesthetics or subsurface storage areas. Any and all such method or methods proposed for controlling increases in stormwater runoff peaks and volumes shall first be submitted to the City Engineer for his review and comment, and may be implemented by the property owner only if first determined by the City Engineer to be reasonable and appropriate, and approved by the City Engineer. (Ord. 2012-76. Passed 10-23-12.) 927.07 STORMWATER STORAGE STANDARDS. Stormwater storage facilities shall be either underground storage facilities, dry or wet ponds or a combination thereof as approved by the City Engineer. Wet ponds (ponds that are designed to retain stormwater to a certain depth) shall be enclosed by a fence in accordance with Chapter 1345. (a) All materials and components used for the construction of a stormwater storage facility shall conform to the latest version of the UNIFORM STANDARDS FOR SEWERAGE IMPROVEMENTS or other approved standards and, where necessary, shall be designed to support a standard H-20 wheel load if the facility is located under a roadway, drive or parking area. Corrugated metal pipe shall have annular ends with matching bands, gasket joints, and watertight seams. All plate bulkheads over 24" in diameter shall be reinforced with external braces and stiffeners. Corrugated metal pipe shall be galvanized or aluminized. Reinforced concrete pipe used for storage facilities shall have premium joints and shall have endwalls or bulkheads designed to resist anticipated loads. Access manholes with access steps shall be provided at each end of an underground storage facility and at intermediate points, if deemed necessary by the City Engineer. The invert elevation of the storage facility outlet and the restrictor pipe shall be aligned in such a manner to eliminate the creation of a sump within the storage facility. Pipe installation methods and bedding materials shall conform to those recommended in the UNIFORM STANDARDS FOR SEWERAGE IMPROVEMENTS. (b) Infiltration basins, also known as stone beds, shall only be approved subject to the following standards: (1) A report shall be submitted from a certified testing laboratory containing sufficient records and data to establish the character of the soil. Such records shall describe the soil conditions found to a depth of at least five feet (5') below the deepest point proposed for the installation of the stone bed or dissipation wells. The report shall include information regarding the level of the water table and soil permeability. Storm Water Management and Urban