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F . The Contractor shall make all arrangements necessary with an <br /> independent commercial laboratory approved by the Department of <br /> Environmental Health for the collection and examination of samples of <br /> water from disinfected water mains . Note : The Contractor may not collect <br /> his own samples . These samples shall be examined for compliance with <br /> the Department of Environmental Health 's and Florida Department of <br /> Environmental Protection 's requirements . Sampling shall be made daily <br /> and continuously unfit two successive examinations are found <br /> satisfactory. Should one examination be found unsatisfactory, the line <br /> shall be flushed and disinfected again . PVC Certified copies of all <br /> laboratory analyses shall be provided to the IRCDUS . The cost al all <br /> sampling , flushing and disinfecting shall be included in the contract price . <br /> IRCDUS personnel shall operate all valves and be present to determine <br /> and control the volume of water used for flushing . <br /> TABLE 10 — 1 . <br /> Chlorine Required to Produce a 25-mq/L Concentration in 100ft of Pipe by <br /> Diameter <br /> 1 -percent <br /> Pipe 100-percent Chlorine <br /> Diameter Chlorine Solution <br /> (inches) (pounds) (gallons) <br /> 4 0 . 013 0 . 16 <br /> 6 0 . 030 0 . 36 <br /> 8 0 . 054 0 . 65 <br /> 10 0 . 085 1 . 02 <br /> 12 0 . 120 1 . 44 <br /> 16 0 . 217 2 . 60 <br /> For Pipes larger than 16-inches in diameter see <br /> AWWA Standard Specifications C-651 -99 <br /> 10 .04 TESTING OF GRAVITY SEWERS <br /> A. Leakage test by exfiltration and infiltration , as described below, shall be <br /> made on all pipes . <br /> B . Exfiltration tests shall be made on . all pipes after backfilling . All sewers <br /> shall be tested such that water is filled to the rim of the lowest manhole <br /> being tested within each section being tested , as directed by the <br /> IRCDUS . Mechanical plugs shall be used on the gravity sewer system in <br /> such a manner that the air can be released from the sewer while it is <br /> being filled with water. The test shall be continued for one hour and <br /> provisions shall be made for measuring the amount of water required to <br /> maintain the water at a constant level during this period . If test results are <br /> unsatisfactory, the Engineer and/or IRCDUS may direct that additional <br /> test be made on any section or the entire pipe . <br /> 10 - 4 <br />