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C . If any joint shows an appreciable amount of leakage , the jointing material <br /> shall be removed and joint remade . If any pipe is defective , it shall be <br /> removed and replaced . If the quantity of water required to maintain a <br /> constant level in the sewer for one hour does not exceed 100 gallons per <br /> inch of diameter per day per mile of sewer and if all the leakage is not <br /> confined to a few joints , the workmanship shall be considered <br /> satisfactory. If the amount of leakage indicates defective joints or broken <br /> pipes , the Contractor shall correct them . <br /> D . Pipe shall be tested for infiltration after the backfill has been placed . <br /> Infiltration tests shall be made under the supervision of the Engineer and <br /> IRCDUS . The length of line to be tested shall be as directed by the <br /> Engineer and/or IRCDUS . The allowable infiltration shall be 100 gallons <br /> per inch of diameter per day per mile of sewer. <br /> E . Rate of infiltration shall be determined by means of V-notch weirs , pipe <br /> spigot or by plugs in the end of the pipe , to be provided and installed by <br /> the Contractor in an approved manner and at such times and locations as <br /> may be directed by the Engineer and/or IRCDUS . <br /> F . In an inspection of the completed sewer or any part thereof shows any <br /> manholes , pipes or joints that allow the infiltration of water in a noticeable <br /> stream or jet, the defective work or material shall be replaced or repaired , <br /> as directed by the Engineer and/or IRCDUS . <br /> G . Leakage between two adjacent manholes may be double the amount <br /> above stated , provided the average leakage for a total length of any size <br /> does not exceed the amount first stated and provided there are not <br /> gushing or spurting leaks . <br /> H . All water used in testing and flushing shall be furnished at the <br /> Contractor's expense . The minimum amount of water to be used is two <br /> (2) times the volume of the pipe . <br /> I . The Contractor may use an air test in lieu of the exfiltration test as <br /> described above . If he elects to do this , he shall submit his proposed <br /> method to the Engineer and/or IRCDUS for approval . <br /> J . If the results of the air test are unsatisfactory , as determined by the <br /> County, the Contractor shall be required to perform the exfiltration test as <br /> outlined above . <br /> K. AT the conclusion of the work, the Contractor shall thoroughly clean the <br /> entire inside of the pipe by flushing with water or other means to remove <br /> all dirt, stones , and pieces of wood or other material that may have <br /> entered during the construction period . Debris cleaned from the lines <br /> shall be removed from the lowest outlet. If, after this outlet cleaning , <br /> obstructions remain , they shall be removed . After the pipe is cleaned and <br /> if the groundwater level is above the pipe , or following a heavy rain , the <br /> IRCDUS will examine the pipe for leaks . If defective pipes or joints are <br /> discovered at this time , the Contractor shall repair them at his expense . <br /> 10 - 5 <br />