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Draft Infiltration and Inflow Report March 1998
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Draft Infiltration and Inflow Report March 1998
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11 - Seal Casting to Chimney <br />Cementitious materials are normally used to seal a frame to the top of the <br />manhole chimney. This seal can become damaged and allow inflow of water into <br />the manhole. Rehabilitation entails excavation to expose the frame to chimney <br />connection, and removal of the frame. The frame is re-sealed and backfilled, <br />followed by pavement replacement, if necessary. <br />12 - Seal Castiniz to Cone <br />Cementitious materials are normally used to seal a frame to the top of the <br />manhole cone, if no chimney is present. This seal can become damaged and <br />allow inflow of water into the manhole. Rehabilitarion entails excavation to <br />expose the frame to cone connection, and removal of the firame. The frame is re- <br />sealed and backfilled, followed by pavement replacement, if necessary. <br />13 - Plug and Waterproof Coat Manhole Chimnev <br />Various defects can develop in chimneys, permitting inflow through cracked or <br />missing mortar, holes, and defective or missing bricks. This rehabilitarion method <br />consists of cleaning the wa11s, repairing holes and cracks, and applying cement <br />based grout in multiple layers. <br />14 - Plug Lift Holes in Manhole Chimnev <br />The sealant material used to seal the precast lift holes has deteriorated or is <br />leaking. This rehabilitation method addresses removal of the deteriorated sealing <br />material and replacement with non-shrink grout or other sealant. <br />15 - Rebuild Manhole Chimney <br />The manhole chimney is deteriorated to the point where it is structurally unsound <br />and standard repair methods will not be effective. This rehabilitation method <br />addresses excavating to expose the manhole down to the chimney to cone joint, <br />installing a new chimney, re-seating the frame, backfilling, and pavement <br />replacement. <br />ADS Environmental Services, Inc. <br />VI-11 <br />
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