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SGLGCTION PROCisSS FOR RUNOF� CO�V7'ROL I3MPS <br />Site Statistics: <br />Total Area of Shaw Creek Condominiums ...................... <br />Less Open Space Arca to Remain Undisturbed :............... <br />Less Bypass Area :............................................................. <br />Equals Total Area Tributary to Detention System:........... <br />...................... 1.8'3 Acres <br />........ ............. 0.182 Acres <br />.................. ... 0.225 Acres <br />...................... 1.466 Acres <br />Reference: City of Everett Stormwater Managemcnt Manunl, Section 1-3.3. <br />STEP 1: DETERMING RUNOFF CONTROL OQJECTIVTS <br />Step I A O///WATER SEPARATOR BAfPS BASED UPON LAND USE <br />77ie proposed land use does not trigger a requircment for an oil/watcr separator. <br />Step 1 B RUNOFF TREATML•NT <br />The total impervious area of the proposcd development exceeds the 5,000 squarc foot <br />impervious area thrcashold. Therefore, RunotTTreatment will bc requircd. <br />Stcp I C STREAM BAN6 EROS/ON CONTROL <br />The total impervious area of the proposed de��elopment excceds the 5,000 square foot <br />impervious arca thrcashold. Thereforc, Runoff Treatment wil{ bc required. <br />�TEP 2: S�LECT RUNOFF TREATI�IF.NT AND STRI:AMI3ANK I;ROSION <br />CONTROL 1311PS <br />Stcp 2A SELECTlON OFOII./IPATF_R SE/',4RATOR. <br />:\n oil/�catcr scpar:uor �� ill not bc rcyuired. Reter to titcp I:�. <br />Stcp '_Il SCREEN FO/� AfETHODS OFSTREAd1 BANR EROSION C0;1'TROL. <br />l he e�isting soil t}pe on the project sile consists of Aldencood Urban Land Cumplex. <br />Flydrologic Soil Group "C". Since this type of soil is not considered �uitable for an <br />intihrati�m system, an intiltration sqstem has not been proposed. <br />Duc to dic proximit}' of thc �cctulnd buitcr arcas to thc mar of thc proposcd condominium <br />wiits, as �cell as the generally unsuitahle nuture of Ihe rxisting soil t}pe, root=top runofl' <br />infihr�tion or Jispersion systems ha�e not been proposrd. <br />Stcp 2C DETER6f/NEAfETHOD OFRUNOFFTREATAfENT. <br />13:ucd upon rc�ic�c ��( thr runoff trcauncnt f3�1P, Jcscribcd in �hc Sturm�cater <br />�9anagement \tanual, as �cell as discussions with City sta(7�, rwioff treatment will be <br />��m� i�ir�l h� dead stc�rage in a detenti� ripe anJ �c�elatrJ tre.�ment cell s�'stem. <br />8 <br />ia <br />