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Table 1-2.5.1 On-Site Stormwater Management Requirements for Projects Triggering Minimum Requirements #1 - #9 Project Type and Location Requirement Low Impact Development Performance New development on any parcel inside Standard and BMP T5.13: Post-Construction the UGA, or new development outside the Soil Quality and Depth (p.911); or List#2 UGA on a parcel less than 5 acres (applicant option). New development outside the UGA on a Low Impact Development Performance parcel of 5 acres or larger Standard and BMP T5.13: Post-Construction Soil Quality and Depth (p.911). Low Impact Development Performance Redevelopment on any parcel inside the Standard and BMP T5.13: Post-Construction UGA, or redevelopment outside the UGA Soil Quality and Depth (p.911); or List#2 on a parcel less than 5 acres (applicant option). Redevelopment outside the UGA on a par-Low Impact Development Performance Standard and BMP T5.13: Post-Construction cel of 5 acres or larger Soil Quality and Depth (p.911). Note: This table refers to the Urban Growth Area (UGA) as designated under the Growth Management Act(GMA) (Chapter 36.70A RCW)of the State of Washington. If the Permittee is located in a county that is not subject to planning under the GMA, the city limits shall be used. Low Impact Development Performance Standard Stormwater discharges shall match developed discharge durations to pre- developed durations for the range of pre-developed discharge rates from 8% of the 2-year peak flow to 50% of the 2-year peak flow. Refer to the Standard Flow Control Requirement section in Minimum Requirement#7 for information about the assignment of the pre-developed condition. Project sites that must also meet minimum requirement#7 —flow control - must match flow durations between 8% of the 2-year flow through the full 50-year flow. List #1: On-site Stormwater Management BMPs for Projects Triggering Minimum Requirements #1 through #5 For each surface, consider the BMP's in the order listed for that type of surface. Use the first BMP that is considered feasible. No other On-site Stormwater Man- agement BMP is necessary for that surface. Feasibility shall be determined by eval- uation against: 1. Design criteria, limitations, and infeasibility criteria identified for each BMP in this manual; and 2014 Stormwater Management Manual for Western Washington Volume I- Chapter 2 -Page 56 9