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Major Mafntenan�Q: Sediment RemovallCuilridge Replacement <br />Depending on the configurqt(on of the particular �yslem, a worker rnay he requireil to enter the vault <br />to perform some tasks. If �iault enlry is requhr.d, OSHA ntles for gen�ral conpned spaoo onfry must <br />6e foliowed. Filter cartridge replacement should oxur duriny dry weather, ancl it may be neeassary <br />to plug the fllter inlet pipe �F baso tlows axist. Standing water present In the vault should be regarded <br />as pol, ,ted and sfiould be contained du�ing this ope�aiion by lemporarily capping the manitold <br />connec ors. <br />Replacement cnrtridges will be delhiered to th� sfte by onQ or lwo ulili'ry workers, dependinp on the <br />particular un(l, ancJ a h�uling trucic operator, InFormaUon conCerninc� how to oblain tttn repla �ernent <br />cartridges fs availeble f�m Stormwaler Mana�ement Inc. <br />warning: In the c:ase of a spill, lhe worker stiould abort maintenance activities untii the proper <br />guidancci is obtained. Notify the local hazard conirol agency and Stormwater Man?nement Inc. <br />immediately. <br />To conducl cartrtdge replacement and sodii��onl removal mainlenance: <br />1. If applicable, �et up safety equipment to protect pedestrians from tall hazarris due to open vault <br />doors or when worVc is heing done near ro�dways. ' <br />2. Visuaily Inspeci the extemel conditicn of the unft and lake notes conceming defects/probiems. <br />3. Open the doors to the vault and allow fhe s;ysfem lo alr out for G-10 minutes. <br />4. tNilhout enterinfl tho vault, give the inslde of lhe unil, including components, a general condilion <br />inspection. <br />5. Malce notes about the exlemal and fnlernal conditlon of the vault. <br />Give parlicufar atterdion fo recoMing the level nf sediment 6uild-up on tlie floor of liie vaull, in the <br />forebay, and on top of Ihe Internal r.ompunents, <br />6. Remove largo ::;e debris and fresh us(nc� a pole with a grapple or net on the end. <br />7. Using a boorn, crane, cr other davice (dolly end ramp), oi8ond the roplacement cartridges (750 <br />Ibs, each) znd set aside�. <br />8. Usfng an appropriate sling, a(t�ch the cable from lhe boom, �rane, or Vipod to the cartridge be(ng <br />removed. Conlact SMI for specificalions on appropriale ettachntenl devices. <br />This activity may require lhat woricers entet' lhe vaull lo remove the catiridpes from tho drainage <br />system and place ihem under the vault opening for lifting. <br />Important: hote lhat cariridges contalnfnp media otlier Ihan Ihe leaf inedia requiro unserewing <br />frorr� their threaded connectors. Take care not to damage lh� manf(old connectors. This <br />conneclor shoulci romr�in installed in lhe manifold end capped if necessary (seo Figure 1 far <br />c:arlridge diagrem). <br />'f aoo.5la.hG67 F 000.561.1271 W w�roy,stormv�aterinc.tont a � <br />