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03/07/95 09:38 $503 224 7820 WOODWARD -CLYDE 4003/022 <br /> • Maintenance guidelines (both short and long - terrn) <br /> • Landscaping and vegetation selection/placement <br /> • Secondary benefits for the facility (e.g., recreation, habitat) <br /> • — -isy Costs (installation and long -term maintenance, where available) - The interim guidance should apply to all privately designed projects for private and <br /> public properties, and all land use types: residential, commercial, industrial, <br /> institutional (e.g., schools), parks and open spaces. The guidance should also apply to <br /> publicly- designed projects for parks, public buildings, etc. Both new development <br /> and redevelopment would be affected. Additionally, the interim guidance for <br /> maintenance practices should be used to ensure proper maintenance of stormwater <br /> quality facilities that are already in place, if possible. <br /> Reference materials developed for other areas should be used with caution; what <br /> works well in other areas won't necessarily work well in Eugene. There are many <br /> variables that will affect actual performance of a water quality facility, including soils, <br /> topography, groundwater and surface water condition, local water quality standards, <br /> land use, local land use restrictions such as environmental zoning, construction <br /> methods and maintenance techniques. City staff and the private engineers/designers <br /> must have a good understanding of applicability of the various facilities, given the <br /> unique local characteristics. <br /> Guidance materials work only as well as the process which supports them. This <br /> process not only includes the plan review and permitting process, it also includes <br /> continual education of City staff and those in the private sector regarding use of the <br /> materials and the City's objectives and standards for control of pollution from new <br /> development. Education is also required for proper construction and maintenance of <br /> the facilities to ensure optimum continued performance. Another critical part of the <br /> process is the City's recommended water quality design storm. Engineers and <br /> designers will require this bit of information before they can begin conceptual site <br /> design. Therefore, an interim design storm recommendation will likely be needed <br /> while interim guidance is being used, until the design storm standard is developed in <br /> 1996. <br /> Issues <br /> (see additional discussion below under "Background: Development Impacts') <br /> 1. New development and redevelopment have been recognized by EPA and the <br /> City as sources of pollutants in stormwater runoff, leading to potential water <br /> quality degradation in natural waterways and the City's storm drain system. <br /> S1945042na \task02001onsite controls\techmem.ck 2 <br />