(a) It shall be the intention of these specifications to secure a sewer system with a minimum amount of infiltration. Maximum allowable infiltration shall be 200 gallons per mile per inch of diameter for sanitary sewer per twenty-four hour day at any time, and 500 gallons per mile per inch of diameter for storm sewers per twenty-four hour day at any time. The joints shall be tight, and visible leakage in the joints or leakage in excess of that specified above shall be repaired at the contractor’s expense by any means found to be necessary.
(b) To check the amount of infiltration, the contractor shall furnish, install and maintain a V-notch shape crested weir in wood frame, tightly secured at the low end of each sewer lateral and at locations on the main sewers directed by the Engineer. The Engineer will check the infiltration by measuring the flow over such weirs. When infiltration is demonstrated to be within the allowable limits, the contractor shall remove such weirs.
(c) All sewers will also be tested with a flow of water before acceptance by the owner. Any sewer which does not show the velocity calculated by the Engineer based on its size, type and gradient, shall be dug out and, if such sewer when uncovered is found to be not in accord with drawings and specifications, the contractor shall bear the expense of such digging up and relaying. If found to be installed in conformance with the drawings, the Village will bear the expense. Sewers must be straight between manholes and will be tested for straightness by flashing a light from manhole to manhole, by tamping or by other suitable means.
(Ord. 352. Passed 10-22-62.)