Laserfiche WebLink
SECTION 4 – SANITARY <br />61 <br />4-3.11 (b) TELEVISION INSPECTION <br />1.) Provide television equipment capable of properly documenting the conditions as found within <br />the pipe in a digital video format (DVD). Lighting for the camera shall illuminate the entire <br />periphery of the sewer. The camera shall be radial view type capable of viewing 360 degrees <br />within the pipe and shall provide an unobstructed view of the full pipe. <br />2.) The video inspection shall begin with a clear identification of the televising location, upstream <br />and downstream manhole designation, and pipe diameter. The DVDs shall provide an accurate <br />length measurement of the entire segment and of the distance to each lateral connection. Pan <br />all lateral connections on both the pre- and post-televising recording. <br />3.) Reverse televising set-ups shall be utilized when line obstructions prevent full segment <br />televising from the initial set-up direction. <br />4.) Both a pre-lining and post-lining DVD shall be submitted to the City Engineer for approval. <br />The DVDs shall be clearly and properly labeled. Inspection for individual sewer segments <br />(manhole to manhole) shall be bookmarked. Pre-lining and Post-lining DVDs and inspection <br />reports shall be submitted to the City Engineer within seven (7) days of inspection. <br />4-3.11 (c) INSTALLATION <br />1.) The CIPP shall be installed in accordance with the practices given in ASTM F1216 (for direct <br />inversion installations) or ASTM F1743 (for pulled-in-place installations). The quantity of <br />resin used for the tube’s impregnation shall be sufficient to fill the volume of air voids in the <br />tube with additional allowances being made for polymerization shrinkage and the loss of any <br />resin through cracks and irregularities in the original pipe wall. A vacuu m impregnation <br />process shall be used in conjunction with a roller system to achieve a uniform distribution of <br />the resin throughout the tube. <br />2.) The resin-impregnated tube shall be installed into the host pipe by methods approved by the <br />Manufacturer and proven through previous successful installations. The insertion method shall <br />not cause abrasion or scuffing of the tube. Hydrostatic or air pressure shall be used to inflate <br />the tube and mold it against the walls of the host pipe. There will be no use of sewage in place <br />of clean water for insertion of the tube, or for the curing of the liner. <br />3.) The tube is to be installed in a controlled manner at a rate sufficient to prevent damage to the <br />tube. <br />4-3.11 (d) CURING <br />1.) After tube installation is completed, supply a suitable heat source and recirculation equipment. <br />The equipment shall be capable of delivering hot water or steam throughout the section to <br />uniformly raise the temperature above the temperature required to effect a cure of the resin. <br />2.) The heat source shall be fitted with suitable monitors to gauge the temperature of the incoming <br />and outgoing heat supply. Thermocouples shall be placed between the tube and the host pipe <br />in downstream manholes at or near the bottom to determine the liner tem perature during cure.