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<br />CITY OF SUNNY ISLES BEACH SECTION 02762 - 13 <br />TELEVISING STORM SEWER SYSTEMS <br /> <br /> <br /> <br />3.2 LINEAR MEASUREMENT <br /> <br />The CCTV camera location footage counter shall be zeroed at the beginning of each <br />inspection. The survey unit location entered on the footage counter at the start of the <br />inspection shall allow for the distance from the accepted start of the length of the sewer <br />to the initial point of observation of the camera (pre-set footage). In the case of resuming <br />an inspection at an intermediate point within a sewer reach, the footage counter shall be <br />set to start at the distance from the upstream maintenance hole to that point, as <br />previously recorded by the counter. The Contractor shall ensure that the footage counter <br />starts to register immediately when the survey unit starts to move. <br /> <br />The lateral camera shall be pushed from cleanouts to the sewer main and be equipped <br />with a footage counter to display and record inspection footage. Maximum rate of travel <br />shall be 30- feet per minute when recording. <br /> <br />Prior to commencing inspections, the Contractor shall demonstrate compliance with the <br />linear measurement tolerance specified below: <br /> <br />A. The equipment shall measure the location of the camera unit in 1-foot increments <br />from the beginning (upstream end) of each continuous section. This footage <br />location must be displayed on the CCTV monitor and recorded on the videotapes. <br /> <br />B. The accuracy of the measured location shall be within + 0.5% of the actual length <br />of the sewer-reach being surveyed, or 1-foot, whichever is greater. <br /> <br />3.3 MEASUREMENT OF SAGS <br /> <br />The CCTV camera shall be equipped with a measuring device capable of accurately <br />measuring the depth of standing water up to 3-inches. The measuring device shall be <br />mounted to the front of the unit and be capable of being read as the unit advances <br />through the pipe. <br /> <br />3.4 CCTV MONITOR DISPLAY <br /> <br />The images displayed on the CCTV monitors will be a view of the pipe above the water <br />surface as seen by the CCTV camera as the unit is conveyed through the sewer. <br /> <br />The camera lighting shall be fixed in intensity prior to commencing the survey and the <br />white balance set to the color temperature emitted. In order to ensure color constancy, <br />no variation in illumination shall take place during the survey.