After the gravity sewer lines have been cleaned, flushed and manhole channeled, the developer shall provide a complete televised inspection.
The developer shall perform a complete televised inspection of the sewer pipe and appurtenances and shall provide to the district a narrated DVD color audiovisual recording of the inspections together with a written log of the television inspection. The camera shall be a pan and tilt type equipped with adequate light and focusing to allow inspection of sewer main, side sewers and full circumference inspection of main line joints and fittings. The district shall determine if the quality of the televising is acceptable.
Immediately prior to the televised inspection, the developer shall run water through each sewer line for five to 10 minutes to provide water for detection of any adverse grade sections visible by the presence of ponded water. The camera shall be stopped periodically at the ponded areas and the depth of water shall be measured with a ball of known diameter on the pull line. During the inspection, all tees and other fittings shall be logged as to exact location within one percent maximum error in measurement, wherein accuracy is checked with various fittings and the terminating manhole.
The district shall be notified 48 hours prior to any television inspection and this work shall be performed on a schedule to allow the district to witness the inspection.
Any defects in material or installation identified by the television inspection shall be repaired as required by the district at the developer’s expense.
(1) Sewer Video Requirements.
(a) Start videoing from the downstream manhole to upstream manhole.
(b) The center of the downstream manhole will start at zero and the uphill manhole footage will be finished at the center of the upstream manhole. Verbalize the side sewer with a station such as 1+64 along with writing on the screen to make it permanent on the video log.
(c) Control the lighting power to best visualize the system including side sewers.
(d) Stop and video all fittings including the side sewer connections. Visualize any joints that appear to not be normal such as wide gaps which require video around the connection point to see if any gasket is showing. Verbalize and document on the video the fittings or any abnormalities.
(e) Document ponding verbally as well as typing onto the screen which will then be on the video log. Document the start of the pond to the end of the pond along with depth of the pond.
(f) Video train to include one-inch visible ball with graduated one-eighth-inch indicator rings.
(g) Make sure the selected camera is appropriate to the pipe material and diameter to create the best video record. The camera needs to be stabilized. The lack of traction from the camera creating a jumping video is not acceptable.
(h) When videoing the inside of a manhole focus on the joints along with the risers for the ring and cover. Turn the camera lights up when looking inside the manhole.
(i) When looking up side sewers use the zoom and focus on any apparent defects.
(j) The video along with the manhole logs assist with verification of side sewers for the as-builts.
(k) Camera tractor speed needs to be kept at a consistent pace and not too fast.
(l) When documenting on the video and video log, use stations for the tees from the downstream manhole.
(m) When documenting a tee for a side sewer use “tee left” or “tee right” along with the stationing from the downstream manhole.
(n) Verbalize on the recording anything documented on the log. [Res. 735 § 1, 2017.]