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, <br /> Stormwate�Pollution Prevention Piai <br /> ' _ - <br /> ' rVternate sedimerd control 131�4Ps are included in Appendiz C as a quick reference tool for the <br /> ' onsite inspector�n the event the I3T4P(s) listed abo��e are decmed ineffective or inappropriatc <br /> during conswction to satisfy the requinments set forth in die General NPllES Perntit (Appendix <br /> D). To avoitl potential crosion and sedimcnt control issues that may cause a violation(s) of the <br /> , NPDES Construction Stomin�ater permit (as providcd in Appendix ll), ihe Certificd Erosion azid <br /> Sediment Control Lead w711 promptl}� initiate thc implemcntation of one or morc of the <br /> altemative T3D1Ps listed in Appendix C afler the first sign that existing I3\1Ps are ineffcctivc or <br /> � failing. <br /> In addition, sediment will be removed from pavad areas in and adjacent to construction ���ork <br /> ' arcas m:vwally or using mcchanical s��ccpers, as nccdcd, to minimizc tracking of scdimcnts on <br /> �•eliicle tires a�eay frum the site and to minimize washoff of sedimenLs from adjacent strcets in <br /> runoff. <br /> , \lrheuc��er possiblc, scdiment ladcn water shnll be dischargcd inm onsitc, relativel}' Icvel. <br /> vegctated arcas (B\�fP C240 paragraph �, page 4-102). <br /> ' ln some cases, sedimcnt discharge in concentrated runoff can be conirolled usin�;pern�anent <br /> storm�vatcr (3T1Ps (e.g., infiltratioo s�vales, ponds, trenchcs). Sediment loads can limit thc <br /> ' effectiveness of some permanent stomi��ater BMPs, such as those uscd for infiltration or <br /> biofiltration; howe�cr, thosc II\1Ps designed m remove solids by se(tling (wet ponds or detcntio❑ <br /> ; nnds? c:ui bc uscd during thc constniction phasc. \�'hen pcmiancnt stomi«•atcr I3�ll's will Uc <br /> ' uscd to control scdiment dischargc during construction; thc struc�urc will bc protccicd from <br /> escessive sec'•imenta�ion with adequate erosion and sediment conirol 13\�iPs. r\ny accumulated <br /> sediment shall be removed aflcr constn�ction is complcte and the penna�rent storniwater I3ViP <br /> ' �vill bc restabilizcd ���itli �•cgct.uion per appticahlc dcsign rcquircmcnts oncc thc rcm�indcr of ihe <br /> si�c has bccn stabilizcd. <br /> ' 1'he �i�llo��in� 1��4Ps will he implemenied as cnd-of=pipe sediment cnntrols as rcquired to mect <br /> pcnniltcJ uirbi�lity limits in lhc sitc disch,�rgc(s). Prior to the itnplcmcn6�tion of thcsc <br /> ' technologics, sedimenl sources and erosion control and soil st.�biliz�tion 131�4P eff'orts ���ili be <br /> m,iximizcd to rcducc thc nccd for cnd-of-pipc scdimcntation controls. <br /> t ■ I�cmporar}' Scdimcnl Pond (13�4P C2•I1) <br /> • Construction Stormwater Piltration(IiN1Y C251) <br /> , ■ Conswction Stonnwatcr Chcmical Trcatment (BMP C 250) <br /> (implemcnted only �vith prior writtcn approval from Ecology). <br /> � <br /> ' -- — -- <br /> — --- - �-- — <br /> ' <br />