1001 SHUKSAN WAY 2016-01-01 MF Import

i . � IThe volumes for the open water cells and weHand treatment all are as follow: ITwn Open Water Cells Volume of the dead storage at elevation 513.5 = 0.(� acre-ft � Volume of the dead storage at elevatio�.�515.0= 0.43 acre-ft Volume of the dead storage at elevation 517.0= 1.65 acre-ft IWetlond Treatment Ce!! � Volume of the dead storage at elevation 513.5 = O.W acre-ft Volume of the dead storage at elevation 517.5 = 0.32 acre-ft IPond Control Structure I The Santa Barbara Urban Hydrograph (SBUH) method was used with the WaterWorks computer program to calculate the orifice sizing. The calculations are in Appendix A. I Ori6ce size for elcvation 515.32 feet=2 inch Ori6ce siu for elevation 521.61 fat =5-3/8 inches Orifice size for elevation 522.73 feet =7-1/2 inches 1 I Emergency Ove�flow Spillway The /998 King �ounry Sur;'ace Woter Design Manual was used to calculate the dimensions of the I spillway for the 100-year developed condition runoff. The invert of the spillway was set at 524.50 feet, 12 inches above the 100-yeaz water surface elevation, so the spillway's riprap blanket would be above the peak stage elevation. The length of the overflow spillway weir(L) was calculated at I 75 feet based on a head (h) of 0.2 feet. See Appendix B for calculations. � f 6. Analysis and Design of Required Source Control BMPs ! The following 5ource Control BMPs wtre identified as appropriate for The FSA warehouse � basecl on the Construction Activities Checklist (see Table 2) and are described in the Washington State Depaztment of Ecology Stormwater Management Manual for the Puget;ound Basin. I . C1.20 Handling of Petroleum Products . C1.30 Nutrient Application and Control I • CI.40 Solid Waste Handling and Disposal • C1.50 Use of Chemicals During Construction . C1.60 Managing Hazardous Products IFood Services o(America Stortnwater Sire Plan and Stamwata Darntim Pood ,=,� I Hydraulic Rcport '� � r J