Item C: Stormwater Development Standards

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stormwater runoff that will be generated by the proposed new development for the flood control design storm. If the applicant cannot establish that existing stormwater drainage facilities have such capacity, the applicant must construct new storm drainage facilities to accommodate the stormwater draining from the proposed development. 2. EC 9.6791, Stormwater Pollution Reduction , applies to land use applicants requesting approval of a cluster subdivision, a conditional use, a partition, a planned used development, site review, or a subdivision tentative plan and is intended to reduce the impacts that urbanization is having on the City’s water quality by providing standards for the capture and treatment of stormwater runoff from development. This provision requires that applicants include pollution reduction facilities selected from the Stormwater Management Manual that treat all of the stormwater runoff from the development site that will result from the water quality design storm. The pollution reduction facilities must be sited, designed and constructed according to the Manual and must be designed using one of the three methodologies outlined in the Manual. 3. EC 9.6792, Stormwater Flow Control , applies to all land use applications for development sites in the headwaters area requesting approval of a cluster subdivision, a conditional use, a partition, a planned used development, site review, or a subdivision tentative plan and is intended to protect waterways in the headwaters area from the erosive effects of increases in stormwater runoff peak flow rates and volumes resulting from development. The provision requires that applicants demonstrate, using methodology in the Stormwater Management Manual, that peak rates of flow delivered to an existing open waterway at a point above 500 feet in elevation will not increase during storms larger than the water quality design storm and smaller than the flood control design storm as a result of the development. The facilities to control the rate of stormwater runoff must be sited, designed and constructed according to the Manual. 4. EC 9.6793, Stormwater Oil Control , applies to all new commercial and industrial development with parking lots that store wrecked vehicles, all development and redevelopment that would result in an expected daily traffic count greater than 100 vehicles per 1,000 square feet of gross building area, that would result in 100 or more off-street parking spaces or that receives an adjustment approving installation of 125 percent or more of the minimum off-street parking spaces and is intended to protect the City’s stormwater system from oil and grease from stormwater runoff of impervious surface areas on properties that produce high concentrations of these pollutants. Applicants must site, design and construct oil control facilities in accordance with the Stormwater Management Manual. 5. EC 9.6794, Stormwater Source Controls , applies to fuel dispensing facilities and surrounding traffic areas where vehicles, equipment, or tanks are refueled on the premises, exterior storage of liquid materials in quantities of 50 gallons or more, all facilities that store solid waste, developments that stockpile or store high-risk or low-risk bulk materials in outdoor containers, developments proposing the installation of new material transfer areas or structural alterations to existing material transfer areas, all development with a designated equipment or vehicle washing or steam cleaning Exhibit A to Ordinance No. ___ Findings of Consistency