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( <br /> ' BMP C121: Mulching <br /> � Purpn.�r I hc pui�,��.c ��(nwl.hinp a�,il. iti u� p;oci�lc innncJi;+tc irni}��n;n� <br /> protcelion from ciosion. �iulch also cnhancc, ��lant c>tablishmcnt I�� <br /> conscrving moistm'e, holding fenilizcr, sccd, and i�,psoil in placc. and <br /> � modcraung soil tcmncratures. "fhcrc is an cnormous �;�rict� uf mulrh�. <br /> that can Uc used. Only ihc mosi common h pc�arc discusscd in th i, <br /> scclion. <br /> l ('nudr�inns u/'Usr As a tcmporary covcr mcasurc, mulch shoul�i bc uscd: <br /> 1 <br /> e On disturbcd arcas ihat rcquire covcr mcasw•cs lor Icss than �U da�s. <br /> � • As a covcr for sced during thc�vct scason and dw ing thc hut summcr <br /> months. <br /> � . Dw•ing the���et season on slopes steeper than 3H:1 V with morc than 10 <br /> fcct of vc�tical rclicf. <br /> . Mulch may be applied at any time of thc ycar�nd must bc rc5�eshed <br /> � periodically. <br /> Desl,�n and For mulch materials, application rates, and specifications, see'I'able a.7. <br /> I In,�taAn�ir�n Note: Thicknesses mny be incrcascd for disturbcd areas in or ncar <br /> Sj�eriJirntinns sensitive m•cas or othcr areati highly suseeptible to erosion. <br /> Mulch usecl within thc ordinaty high-���ater mark of sm•facc walcrs should <br /> � bc sclected to minimiu potcntial (lotation of urganic ntattcr. Comp��stcd <br /> organic materials havc higher specific gr�vitics(densities) than su•aH�, <br /> wood, or chipped matcrial. <br /> � .Uniiuc�raiur . "nc� thickness of ihc cnvcr must bc maintaincd. <br /> Srnu�lrn•ds . qn�� arcas that e�perienee crosion shall be remulched and,'or protected <br /> � �vith a nct or Ulankct. If thc crosion problem is drainage related, then <br /> the problem shall be f ixed and the cruded area remulched. <br /> � <br /> � <br /> � <br /> � <br /> � <br /> � <br /> � q-?p Volume !I- Construction Sformwater Pollution Prevenfion February 2005 <br /> c�� <br /> 1 <br />