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PROJECT SUMMARY <br /> 7'he project consists of thc construction of a cellular phone tower for Nextel <br /> Commu��ication Services. The project site is located at 2215 Merrill creek park�vay in the <br /> city of Everett, Washington. The project contains Aldenvood soils that have a hydrolob�c <br /> classification ol'"C". <br /> �Yater Quality Design <br /> Water quality treatment will be providcd by the usc of a catch basin stom� filtcr <br /> manufactured by Storntwater Management Inc., located downslremn of the Uioswale in <br /> Uehveen the outfall pipe from the bios�vale and the existing catch basin that has a rim <br /> clevation of 584.10. Pcr mccting with Jane Zimmennan, Senior Engincer of thc City of <br /> Gvcrett, we are proposing a hvo-cartridgc stonnfilter to treat the existing building, <br /> parking lol nnd the sun�oundcd arcas draining to the cxisting detention system. <br /> Stormfiltcr Sizine Calculations: <br /> Area included in the analysis = Q37 Acres <br /> Impervious area = 0.37 Acres(CN=98, Tc= 6min) <br /> �Vater qualily flow is calculaled as the 6-montl�/24hr-pcak tlow. SBUH Methodology <br /> with Type lA rainfall is used to calculate the peak tlo�v using lhe soliware "Stonnshed" <br /> Uy Gngenious Systems Inc. Kelcr to lhe following for more details. <br /> Rainfall Data <br /> C-Montlt =096 inches <br /> 2-yr/24hr = I.55 inchcs <br /> 10-yr/24hr =2.25 inchcs <br /> 100-}T/24hr = 3.25 inches <br /> �/1 <br />