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SECTION i/I - Analysis � Design of Source Control BMPs <br />GENERAL SITE RUNOFF <br />The water quality treatment for this project is provided by a system of well-accepted <br />best management practices: <br />(a) Rain gardens for water qualiiy treatment and runoff flow attenuation <br />(b) Com�ost amended soils for pollutant removal <br />(c) Vegetated filter strips for pollutant removal <br />(d) Sand filters for phosphate removal <br />(e) Infiltration to groundwater, and <br />(f) Compost filter berms for quality treatment and flow attenuation <br />Each of these BMPs working in concert with the others ensures that runoff from the site <br />is fully ireated and mitigated. <br />BMP T5.13 — POST-CONSTP.UCTION SOIL QUALITY AND DEPTH <br />BMP T5.34 — MULTIPLE SMALL BASINS <br />BMP C206 — LEVEL SPREADER <br />As shown above, the vast majority of the runoff - certainiy significantly more than the 6- <br />month water quality event - infiltrates into the compost-amended and native soils. <br />bi�tinp vegelotion pnrnarily Herf FL^er <br />u� nvl�r�. UrUarswry JmninaL,d Lf <br />� cnlmnn f?rrry antl fllnrk B�•rry <br />Sequenliol Fryoul of Ue�ms �ra.i6>s� <br />stumge tx stcrm mm t. Tho <br />-��nru'at'rm eHat 4^ �c inliMrotc mr! <br />ebrtn e�vea. <br />�.4_ Uminoge R<poit lor Cdade. <br />r . ,,,L <br />,�,i^���'� . <br />i' '..1 <br />.. . ,�Zd:;k.- . <br />y� � L <br />_ ' �*�, ��F�� r�WS�'i <br />.� �%�' <br />-" Flla bems pace�i pruunA egnifKor;� <br />vegetol'r.n anC ensLng Irees. mimrts <br />hummocL: iwnJ In maWre larests. <br />Ueims pia.itle Ilo� athnuoGan, Vmimenl <br />cirJ aKwmye icGttm!cu 7 ��rcv`rfr� <br />AnH�r Fnhanr�menL <br />�iver5- eyeciee ol •hruLs <br />and eve�grerm added to <br />improvc [�ul/er funclion. <br />YON fbpn <br />N4E QHq. <br />Inma5.5197 <br />iC=5!9 03 <br />I `��l �41 SWt�cJ Prya uWe:-- � <br />n re. <br />+ wh nn! <br />KTed SPrW *r. See Deln:. <br />�� on �s ari xi � S <br />Figurc J- End-nf-Ai.lc R��in G•rrJen :md Biofil[rntinn Bcrms <br />The area of the site contributing to the rain gardens encompasses the central core of <br />the site. Runoff irom the front yards, driveways and internal roadway are conveyed via <br />HEARTHSTONE 1_ANE 11 DRAINAGE REPORT <br />APRIL 2006 <br />