10025 19TH AVE SE BASE FILE 2018-01-02 MF Import

, , h) All other applicable, a^d non-conflicting, criteria in the current edition of SMI's Product Design Manual shall be followed in the design, construction and maintenance of the SMI Storm Filter or, this site. i) For Storm Filter located downstream of detention systems, the SMI mass loading design procedure shall be utilized, with the following assumatians: 1) TSS removal requi�ed = 80% 2) Vb = the v�lume of dead storage plus the 7-day average live storage volume from the routing of the 6-month, 24-hour storm through the detention system (if a 7-day routing is not available, use Vb = volume of � dead storage) � 3) `✓r= the 6-month, 24-hour storm volume � 4) H = depth of Vb I 5) Mean annual rainfall = 37 inches 6) Percent runoff capture = 90% - 7) Event mean concentration (EMC) = 100 mg/L 8) Alfowable cartridge flow rate = 7.5 gpm 9) Mass load per cartridge = 36 Ibs 10) For checking that Qpn can meet Eri,e,, assume the TSS load entering the filter has a particle size distribution of 5% sand, 85% silt, and 10% clay 19. Where soil characteristics are suitable and other site conditions do not preclude their use, roof runoff systems designed and constructed in accordance with City standards shall be used to infiltrate roof top runoff to the maximum extent practical. 20. Table 1-5.7 of the City's Storm�Nater Management Manual contains an error in the "n" values for sheet flow. The column of values should read "0.011, 0.05, 0.15, 0.24, 0.41, 0.13, 0.40, 0.80". 21. For the medical and dental offices any X-ray developers will need to have silver recovery units in place or haul the used fixer. All dental o�c�s will need to be compliant with the agreement between ihe Washington Dental Association and the Department of Ecology for amalgam control as well as silver recovery/hauling for the X-ray developing. 22. A pedestrian circulation system for the site m�.!st be approved by the Planning Director and Traffic Engineer prior to the issuance of any building permits. Walkways m�st alloyv pedestrians and wheelchairs to gain easy access from sidewalks and bus stops to building entrances through the use of paths which are physically separated from vehicle tratfic and mane� :eriny areas. (See the city's Design and Censtruction Stand:.�ds and Specifications Manual and Section 39.165 of the Zoning Code.) 23. Placement and screening of refuse disposal areas must be provided per Section 39.080 of the Zoning Code as follows: 6��