Ordinance 3168-10 - Laserfiche WebLink

with requirements in the Phase II National Pollutant Discharge Elimination System Stormwater Permit as issued by the Washington State Department of Ecology. SECTION 2: DEFINITIONS. Section 2 of Ordinance 2196-97 (EMC 14.28.020),which reads as follows: (1) "Basin Plan" refers to a detailed analysis for each drainage basin which compares the capabilities and needs for runoff accommodation due to various combinations of development, land use, structural and non-structural management alternates. The plan recommends the form, location and extent of quantity and quality control measures which optimally would meet the legal constraints, water quality standards, and community standards, as well as identifying the institutional and funding requirement for plan implementation. (2) "Best Management Practice (BMP) -physical, structural, and/or managerial practices that, when used singly or in combination,prevent or reduce pollution of water, and have been approved by the Department of Ecology. (3) "City Engineer" shall mean the City Engineer and/or his designee. (4) "Computations" shall mean calculations, including runoff coefficients and other pertinent data, made to determine the drainage plan with rates of flow of water given in cubic feet per second (cfs) and/or cubic meters per second(cms). (5) "Critical Area" shall refer to areas that are highly susceptible to erosion or flooding such as steep or bare slopes, potential slides, flood plains, streambanks, drainage channels, silt bars, wetlands, bogs, marshes, and poorly drained areas. (6) "Design Storm" shall refer to a rainfall event as stipulated in the Storm Management Manual which when used for purposes of design, will specify both the return period in years and the duration in hours (as in 2 year 24 hour storm). 3