Item 4: PH - Ordinance on Stormwater Development Standards

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(3)Standards. (a) Applications shall include pollution reduction facilities selected from the Stormwater Management Manual as follows: 1. For land use applications listed in EC 9.6792(2)(a) for undeveloped land, the selected pollution reduction facilities shall treat all the stormwater runoff from the development site that will result from the water quality design storm; 2. For land use applications listed in EC 9.6792(2)(a) that change or add development to an already developed site, the selected pollution reduction facilities shall treat the stormwater runoff from all added and replaced impervious surface that will result from the water quality design storm; 3. For development permit applications, the selected pollution reduction facilities shall treat all stormwater runoff from all new or replaced impervious surface, or an equivalent on-site area, that will result from the water quality design storm. (b) All pollution reduction facilities shall be sited, designed and constructed according to the pollution reduction provisions and the facility design requirements set forth in the Stormwater Management Manual. Pollution reduction facilities must be designed using one of the three methodologies outlined in the Stormwater Management Manual. (c) The standards in EC 9.6792(3) may be adjusted pursuant to EC 9.8030(24). 9.6793 Stormwater Flow Control (Headwaters). (1)Purpose. The purpose of EC 9.6793 is to protect waterways in the headwaters area from the erosive affects of increases in stormwater runoff peak flow rates and volumes resulting from development. (2)Applicability and Exemptions . (a) Except as exempt under EC 9.6793(2)(c), the standards in EC 9.6793(3) apply to all land use applications for development sites in the headwaters area that drain directly into a headwater stream or drain into a pipe that discharges into a headwater stream that are submitted after [effective date of this ordinance,] requesting approval of one or more of the following: 1. A cluster subdivision - tentative plan (EC 9.8055); 2. A conditional use (EC 9.8090 or 9.8100); 3. A partition - tentative plan that includes the creation or construction of a street (EC 9.8215 or 9.8220); 4. A planned unit development - tentative plan (EC 9.8320 or 9.8325); 5. Site review (EC 9.8440 or 9.8445); 6. A subdivision tentative plan (EC 9.8515 or 9.8520). Ordinance - 7 L:\CMO\2006 Council Agendas\M060410\S0604104-attA.doc 4/3/06 - Ordinance includes changes made pursuant to the 1/9/06, 1/10/06 and 2/13/06 PC meetings and the 3/13/06 City Council Work Session.