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PACE JOB NO. 14364 <br /> An Engineering Services Company JOB NAME Starbucks - Broadway & 10TH <br /> 11255 Kirkland Way, Suite 300 SHEET NO. 2 OF 2 <br /> Kirkland,Washington 98033 CALCULATED BY EM DATE 2/27/2014 <br /> Phone:425.827.2014 Fax: 425.827.5043 CHECKEC BY JW DATE 2/27/2014 <br /> Sizing Stormwater Tanks: <br /> The sizing of the Construction Stormwater Tanks are sized following the design specifications stated in <br /> Volume 2 of the 2010 Edition of the City of Everett Stormwater Management Manual. The <br /> determination of the required volume is shown below, where SA = the required surface area, Vs = the <br /> settling velocity, FS = factor of safety, and Q2 = the two year storm as determined in the WWHM <br /> mr rlol <br /> SA = FS(Q2Ns) — SA = 2(Q2/0.00096) <br /> SA = 2(0.1766/0.00096) — SA = 368 SF <br /> Depth = 3.5 ft <br /> Vol.req= 1288 cu. ft. —* Vol.req= 9635 gal. <br /> Therefore the total construction stormwater volume provided needs to be be greater than or equal to <br /> 9635 gal. The number of tanks required is determined based upon the following calculation: <br /> Tank Capacity = 6900 gal. <br /> Dimensions = 10' Dia. X 13.5' <br /> Tanks Required = Vol.req / Vol.given = 9635 / 6900 <br /> Tanks Required = 1.396376812 2 Tanks Required <br /> P:1P14114364.00 Starbucks1DOCS\CALCS114364_TESC Calc Sheet.xls Page 2 of 2 <br />