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� <br />i <br />c <br />� <br />r <br />'Cable 1- Conveyance System Summary <br />System <br />Arcu (ac) <br />2.az <br />5.25 <br />Stornrn�ater/Uclention Treulroent <br />Peak 25-yr Tlnw <br />13oatyard lletenlion and Se�ver Outfall <br />7.d I <br />I d.38 <br />Minimum <br />rreeboard Q <br />.52 <br />.G3 <br />• Pcr the DcparUnent of Bcology requirements for indu;trial boatyard dischargc <br />the undergroimd detention I,mks have bccu unalyzed to attenuate a minimum <br />of the 2-;�ear 24 hour design flow for dischargc lo the Ciry of Everett's <br />sanilary scwcr systcm. <br />• A summary of this infonnation is provided in Tablc 2. Backup calculations <br />and dctailcd (low analysis arc providcd in Appcndis C. <br />• A stormwatcr rcicasc ratc of 35 gpm has bccn uscd as the dcsign dischargc <br />ralc frum thc dctention sysiem to the City's sewcr systcm. Backup <br />culculutions and dctailcd ilo�v analysis for dcsign of the sanitary sc�vcr P�����P <br />st;i!ion arc providcd in Appcndix D. <br />• A minimum .5 ft of scJimcnt storaoe is to bc providcd throu�ahout thc <br />dctcnlion systcm. <br />'I'able 2- Uclention and Sewer Outfall Summary, <br />System llisch:�rge Rate to <br />Se�rcr (enm) <br />Pcuk 2-yr <br />tlo�r (cfs) <br />1.79 <br />Yarkiug Lot Syslem - Stornililter'CrcaUnent 5}'slem <br />Uctenlion Volume (c <br />Required Actual <br />23,205 �3,S6d <br />. Scc Norlh Mnrina Rcdc��clopmcnt Infrastruction Phasc 1 slorm���atcr rcport. <br />Vl. Anal��sis and Design of Rcyuired Source Co�itrol BA71''s <br />Applicahle Consu•uction Site Acti��ities and the appropriatc [3MP's include: <br />I. 1-1,mdlina of Petrolcum Producls <br />Actions to bc Iakcn to prc��cnt pollulion Gom petrolcum products includc: proper <br />sturage oC pcu�olcum products; adcqualc maintenance of equipment; proper �ispnsal <br />of �vaste; rcicntion of oi! contaminutcd scdimcnt on-sitc. <br />2. Nuu•icnt (�crtilizci9 A�lication <br />Proper,oil stabilization mcasures, scdimcnt control and stormwatcr dctention <br />structures will hr i��ca to kecp inorganic nuUicnt pollulants out of watcrways. <br />