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r <br /> � <br /> ' IV. ANALYSIS ANll UESIGN OF REQUIRED EROSION AND <br /> SEDIMENT CONTROL BMPS <br /> � The Best Managetnent Practices(BMPs)designcd and applicd to the project site are as follo�v: <br /> l. StaUilizcd Construction Gntrance ' <br /> 1 2. Pilter rabric Fcr.ce <br /> d 3. Stonn Drain [nlct Prolection <br /> 4. Clear I'lastic Covcring <br /> � The pioject sile is nol hydraulicall}'ncar any scdimenUcrosion sensitive features. The Scasonal <br /> I Limitations Rating Checklisl scorc lor th�site is 35 points, Icss lhan 100 (sce Appendix A). <br /> With this score, thcrc will be no seasonul limitation period for land altcration activities according <br /> lo Section 1-2.2.1 of the Gverelt Siornnruler Munn�emenl Alnnuul. <br /> I V. ANALYSIS AND DESIGN OF IZEQUIRED RUNOFF CONTROL <br /> IStrcam 13:mk F.rosinn Control <br /> I Thc proposed dcvelopment adds no new impervious arca to the site. In C�ct, thc development <br /> reduces impervious arca at thc site. Stream bank erosion control is nol requircd acwrding to <br /> Section 1-3.1 oi'the Ereren S�ornnraler Alunagemen! A/nnual; thcrefom, no stomi�vatcr <br /> Idetention or retcntion lacility is dcsigned Cor this projcct. <br /> Storn»vatcr Runoff Natcr Qualih• Trc:�tment <br /> ! Stonn nuioff from the project site is discharged dirccQy into the ciry combined se�+•er system and <br /> trcated in the city trcalment plmu. RunolTtrcatmcnt is not rcquired according to Section I-3.1 oC <br /> the Gvcrcl!Stornnraler Afannge�»c�nl ,1lamrnh, therefore, no storni�vater water qu�lit}' facility is <br /> desigtred for this project. <br /> Com�c��ancc Svstcm <br /> Tlte conveyancc system for the project site is sizcd to convey the 25-year storm event of the post <br /> developmenL The preliminary sizing of starni drainage systcros uses the Ration?] Method. Pipe <br /> sizing cafculations for thc project ure included in Appendi� II. <br /> Discharec Locatim� <br /> The developmcnt will maintain the site's natural drainagc patterns and dischargc location. Storm <br /> runoff from thc site will continuc to flo�v from die west toward lhe allcy in the easL It will be <br /> collecicd and discharged into the existing calch basin at tlte south cnd of the allcy, then to the <br /> combined sewer main in 26`�' Street, as before the project. RunofFfrom the building rooCwill <br /> also be collected aud discharged into the public combined sewer main. <br /> [3anner Dank and Mortgaec Center, G�crett 7 Septembcr 200R <br /> Stomiwater Site Plan ' � • � <br />