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.03/07/95 09 :40 $503 224 7820 WOODWARD -CLYDE two -v... <br /> engineers can begin conceptual site design of the stormwater quality facilities discussed <br /> in this memorandum. <br /> ?lac -City does -not have a consistent set of guidance for on -site controls -..Each -- <br /> staffperson utilizes their own set of materials and personal knowledge for providing <br /> verbal recommendations to permit applicants wishing to voluntarily construct on -site <br /> controls. This interaction typically occurs during the plan review process. No written <br /> technical guidance is distributed; permit applicants are encouraged to obtain copies of <br /> the reference materials currently used by the City staff. The technical manuals <br /> currently being used by staff include: <br /> • Washington State Department of Ecology. February 1992. <br /> "Stormwater Management Manual for the Puget Sound Basin." <br /> • King County. November 1992. "Surface Water Design Manual". <br /> King County Department of Public Works, Surface Water <br /> Management Division, Seattle, Washington. <br /> • City of Portland, City of Lake Oswego, Clackamas County, Unified Sewerage <br /> Agency. August 1991. "Surface Water Quality Facilities Technical <br /> Guidance Handbook." Prepared by Brown and Caldwell. <br /> • City of Portland, Washington County Department of Land Use and <br /> Transportation. January 1991. "Erosion. Control Plans Technical <br /> Guidance Handbook." <br /> • City of Austin Environmental Resource Management Division, Environmental <br /> and Conservation Services Department. February 19, 1991. <br /> "Environmental Design Criteria Manual." <br /> Providing a complete set of consistent guidance materials to all staff involved in the <br /> planning process will allow for a more proactive rather than reactive approach. This <br /> will give the staff the tools and information they need to be able to review the range <br /> of possibilities for water quality on -site controls for the unique site conditions early in <br /> the process during the pre - application or conceptual design phase. <br /> Currently private property owners are allowed a discount on their stormwater fees if <br /> they minimize impervious areas on their site and disconnect direct sources of runoff to <br /> the storm drain system (e.g., disconnect roof downspouts). However, there is no <br /> consistent guidance for how to handle the runoff flows that remain on site. Most <br /> property owners (especially on commercial /industrial properties, where the savings are <br /> S\945042na \task0200\onsite controls\techmem.ck 5 <br />