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1?XISI�INCi CONDII�!t)N; <br /> Pishennen's 13oat Shop (P'SS) is locatcd acliaccnt to thc Port of L��crctt �tarina in thc City of <br /> Gverett, Washington. P:iS Icases property from th. Port of Lverett for its Cacilities. �Chc facility <br /> consists of a marine rs,ihca} for the haul out of��ess�ls, indoor shop areas, and outside work <br /> arcas. Thc site is reiati��el}' 11at ��ith less than a three foot elevation change across the site. <br /> Currently, the site rclics mainly on infiltration of srornnvater, with some small paved arcas <br /> draining ro � catch basin collection system that discharges directly into the Port of Gvcrett <br /> Marina. Runoff from thc roof arcas generally discharge directly to the eround. <br /> A small part of the site serves as a boat ���ash station. ���astewater from the boat wash operation <br /> is collected in a closed loop rec}cle s}'siem inst.illed for treatment oCtlie Uoat ��'ash �vastc�vater. <br /> 'l�his wastcw:itcr docs not coiu� in contact �cith storn��vater runoff from thc sitc. <br /> PROP(�SI-.D 1n4PROVT:h4L'N"I S <br /> FI3S plans to p���'e a portion of the existing gra��el oiudoor ��ork arcas to provide a bettcr surFxc <br /> for ��orking on �'esscls. Approsimatel� 0.7� acres ���ill be modified from compacted gravel to <br /> pavemcnt. As part oC the pa��ing project, the site ��'ill be regraded and a storm drainage collection <br /> system �vill be installed. �fhrough discussions with thc Port of Everett, the City of Lverett, and <br /> thc Departmcnt of ficology. it ��as agrecd that i'[3S will be allo���ed to discharge a portion of its <br /> storm�vater runoff to the Cit}' of Eiverctt's �.�'aste���ater treatment facility, with a peak [low bypass <br /> discharging to the Port of Evcrett Marina. Ariditionally, cxistin� roof drains will be tightlined <br /> and discharged throueh tlie existing outCall. <br /> i�tinor grading ol thc sitc �cill bc conducted to routc surface storm���atcr runoff to a ccnval <br /> collection point. Prclimin�ry treatment for oil and grit removal Gom the runoff�tiater �cill occw• <br /> on site in a "Stonnceptor' system. ��he ilo��'s tiom the G month, 24-hour storm ���ill be routed <br /> Gom the `'Sturmceptor � through a discharge line to an existing sanitar�� se��cr manhole on the <br /> site. A Parshall Plume �cill be installcd in this discharge line to enaUle �rionitoring of the tlow to <br /> the sanitary se��'er. <br /> "Che outlet to the sanitaq� se��'er discharge linc ��ill be sizcd to limit thc flo�� to less than 0.2] cfs. <br /> 7�he Port of L•:�'erett currenth- has an agrecment ��ith the City for discharge of storm�vater from <br /> the north marina arca. �Che Port has aerecd to allow Fishermen's Boat Shap to use a portion of <br /> this capacit}� th�t is not beiue utilired by the Port. The system is desiened to route thc entire G <br /> month stonn e�'cnt n�noff and a ma.jorih o£the 3 ycar stormwarer ru:iofPto the Cit�''s �vast��vater <br /> treatmcnt plant for treauncnt. <br /> P'ishermen's I3oat Shop June �, 1998 <br /> El�draulic Report <br /> - � - <br />