Award Bid - 2024 Sewer and Manhole Rehabilitation Proj No. 122-019 - Visu-Sewer, LLC

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2. Verify Location of Resin Injection - A second cause of a stopped wet out occurs when resin has not been injected into the center of the tube. In general, the occurrence of such a problem usually follows a resin injection at an intermediate point along the wet out liner and the cut was not made in the center of the tube. If it is found that the wet out is proceeding uncharacteristically slow, verify that the resin was injected into the center of the tube by opening up the injection site and counting the layers and/or roughly measuring the thickness of the felt layers. Injection anywhere other than the center of the tube will cause problems. Although it is not easy, the problem can be corrected. First use a board by cutting through the appropriate number of felt layers exposing the center of the liner just in front of the slug of catalyzed resin. The slug of resin can then be slowly pushed forward through the cut. White spots on top and/or under the tube or a short (i.e. 5-10 feet) section with white spots • Check Belt Speed--One possible cause may be that the belt is moving too quickly and pushing the resin into the tube faster than the vacuum can fully saturate the felt. Slow the belt down and check the vacuum spikes to eliminate leaks. • Lost Vacuum--If one of the vacuum hoses becomes plugged with resin or is pulled away from the tube and not noticed, vacuum on the tube may be lost. When this occurs, the weight of the resin slug overcomes the force holding the tube together and the resin will quickly move down the tube without saturating the felt. When this occurs, physically stop the resin slug and the belt, and re-establish the vacuum. If possible, check the underside of the tube as it moves off the belt to determine if this area of the tube also has areas that are not saturated. Failure to monitor the wet out may produce a number of problems in the field that will show up at the post inspection. Poorly saturated spots on the liner will not cure properly or have the physical properties to sustain the external hydrostatic water pressure. This would show up as a lift or bump that is soft. Correcting these problems is costly and unnecessary.