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Na. 4— Control Str��lure/Flow Restrictor <br />Maintenance I Dufect <br />Componenl <br />Geitcral <br />Cleanout Gale <br />Orificr. Plale <br />Overilow Pipr, <br />Manhole <br />Catc.h Rasin <br />Augus( 2001 <br />Candition Whan Maintonance is Needed <br />frash anJ Debris I Materlal exceeds 25�0 0( sump depth or 1 <br />�Includes Sedimenq fool below onfice plale <br />Stnir.lcral Damage I Strvcture is not securely attarhed to <br />c�anhole wall. <br />Structuro is not in upright posilion jallow up <br />ta 10°h Irnm plumb�. <br />Conneclions to ouUet pipo aro nul watertighl <br />nnd show signs of rus�. <br />�ny holes--ulher Ihan designed holca--fn lhe <br />S�41ryUfe. <br />Dam�iged or Missinq � Geanoul galo is not wa�ortic�h� or Is missing <br />Grde u�nnot Uo moved up �nd dnwn by ona <br />maintonanc� person. <br />C:iainhod leadinc� to gnio is missinc� or <br />damaged. <br />Ga:n fs rustod over fi0% o( ils surface area. <br />Damaqed or Missiny Control device Is not vrorkin� prop�rly due to <br />n�issing, out of piace, or bent orifice plate. <br />OGstructlons Any trash, debris, sadimont, or ve^,elation <br />blockinc� Ihe ptale. <br />Obslructions <br />Seo "Closed <br />Dotention Systnrrs" <br />(No. 3). <br />See "Cnlc�.h �asins" <br />(Nu �il <br />Any trash or debris blceking (or having the <br />potenlial of blocking) Ihe ovedlow pipe. <br />See'Closed Dalenllon Systems' (No. 3). <br />Seo'Catch �asins (Nu. 5). <br />Vnlun�e V — Riuiolf Treatment <br />Results Ezpactad <br />When Maintenancn <br />la Porformed <br />CoNrol strudure <br />ori9ce Is not blocked. <br />All trash and dobris <br />removed. <br />SUucture securely <br />attached to wall and <br />outlet pipe. <br />Siruclure in conect <br />Canneclions to oullet <br />pipe are �vater lighl: <br />structure repaired or <br />replacod and v�orY.s <br />es deslgned. <br />Strucluro has no <br />holes olh�r than <br />desiqned holes. <br />Galo is watertiglit <br />2nd works as <br />designed. <br />Ga�o moves up nnJ <br />down easily and is <br />watertic�ht. <br />Chain Is in place anA <br />works ns designed <br />Gate Is repaired or <br />replaced to moet <br />desic�n standards. <br />Plate is in p�ace an' <br />works as designed. <br />Plale Is Iree of ell <br />obstructions and <br />works as designed. <br />Pipe Is free of all <br />obstructions and <br />works as designod. <br />See 'Closed <br />Detention Systems' <br />(No. 3). <br />Sne "Catr.h Rasins' <br />(No. fi). <br />4-35 <br />SI <br />