Summary
The work in the section includes performing pre and post construction closed- circuit television video (cctv) inspection of sanitary sewer lines shown on the drawings. Upstream manhole shall be plugged and the sewer to be inspected shall be essentially dry when performing television inspection. The work shall be performed as follows: 1. Perform pre-construction closed circuit television video (cctv) inspection of all sewer lines scheduled for rehabilitation immediately after cleaning to confirm that cleaning is satisfactory and to identify the location of service connections. The pre-construction cctv inspection shall also confirm the need for and location of any low points requiring rehabilitation. 2. Post-construction cctv inspection of the completed rehabilitation work shall be required to confirm compliance with the plans and specifications. 3. Concerns regarding manhole depth, air quality in the sewers, accessibility of manholes, traffic conditions, and safety are to be the sole responsibility of the contractor. 4. The camera system shall include a pan-and-tilt, radial viewing, sewer inspection camera that pans plus or minus 275 degrees and rotates 360 degrees with either automatic or remote focus and iris controls. Camera system shall have an accurate footage counter that displays on the operator’s monitor and the videotape the distance of the camera from the centerline of the starting manhole. Camera shall have a height adjustment which allows the lens to always be centered at one-half the inside diameter, or higher, in the sewer being televised. All cameras used shall be color units specifically designed or modified for use in sewer inspection work. The cameras shall be operable in 100% humidity conditions. Camera lighting shall be sufficient for use with camera, in all cases, the complete video system (cameras, lens, power, lighting, cables, monitors and recorders) shall be capable of providing a picture quality acceptable to the owner and engineer, and if unsatisfactory equipment shall be removed and no payments will be made for unsatisfactory inspections.
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