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� Secction 5 <br /> TreatmentfStream Bank Erosion Control BMP's <br /> RunotfiTreatrnent <br /> 'ihe PGIS created by the proposed development will be Iess than 5,000 sf,therefore wate,r <br /> qualiry treamient for detained stormwater is not proposed. <br /> Runoff Stream Bank Erosion Conorol <br /> Drainage from the development will be collected an�i corneyed to ihe propos+�d detention <br /> tanf;situaied under ihe site'S acceu drive. Discharc�.rates from the detention facility will <br /> match 'k the exisiing 2 year design storm,and rr�tch the existing 10 and 100 year design <br /> storm runoffs. <br /> Design Parameters <br /> P2y- 1.55". P10y-2.Z5", P100y-3.7_5" <br /> Existing:CN 86-8,327 SF,CN 9f3-3,3 I3 SF <br /> Tc m 27 Min <br /> . Developed:CtV 86- 5,4Z3 SF, CN 98 -6,1.17 SF�3,369 SF PGIS/Z,848 SF Non-PGIS� <br /> Tc= 5 Min(Assumed� <br /> Release rates:Match 'k existing 2 ycar, exis6ng 10 and 100 year d�sign srorms <br />