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4. 10 INSTALLATION <br /> A. Unless otherwise noted on the drawings or in other sections of this <br /> specification , the pipe shall be handled and installed in strict <br /> accordance with the manufacturer's instructions . The Contractor shall <br /> use every precaution during construction to protect the pipe against <br /> the entry of non -potable water, dirt, wood , small animals , and any <br /> other foreign material that . would hinder the operation of the pipeline . <br /> Where the groundwater elevation is above the bottom of the trench , <br /> the Contractor shall provide suitable dewatering . All piping shall be <br /> placed in a dry trench , unless the Engineer or IRCDUS approves wet <br /> trench installation . <br /> B . Depth of Cover and Pipe Elevation : Unless otherwise shown on the <br /> drawings , or otherwise authorized by the Engineer, all pipe shall have <br /> a minimum cover of 36 inches . Contractor shall determine top of pipe <br /> elevation and top of ground elevation for every two joints of pipe <br /> installed using a level . Pipe must have the minimum cover described <br /> above and must be within +/- 0 . 2 feet of the top of pipe elevation <br /> indicated on the drawings . Installed pipe , which does not meet these <br /> requirements , shall be reinstalled until it does meet these <br /> requirements . Contractor shall record top of pipe and top of ground <br /> elevations and the locations of where these elevations were <br /> determined and submit this information to Engineer. Engineer <br /> reserves the right to have Contractor excavate and check top of pipe <br /> and top . of ground elevations to see if they conform to the <br /> aforementioned requirements , at no cost to the Owner. <br /> END OF SECTION <br /> 4 - 5 <br />