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' Should any pipe be cracked or defective, the City may allow the Contractor to cut off the <br /> cracked or defective portion and lay the remainder of the pipe if, in his opinion, the cutting of the <br /> cracked or defective end will not injure the balance of the pipe. Permitting such cutting off of <br /> cracked or defective ends, however, will not absolve the Contractor from any of his <br /> responsibility toward the work. <br /> All pipe shall be thoroughly cleaned of earth and rubbish before being placed in the trench and <br /> ' so kept until final completion and acceptance of the worts. Every open end of the pipe shall be <br /> securely plugged when pipe laying is not in progress. <br /> All pipe shall be thoroughly flushed and cleaned after installation but prior to acceptance. All <br /> ' connections to existing lines or manholes shall be plugged to prevent mud and water from <br /> entering the existing system during construction. <br /> All pipe shall be laid on lines and grades as directed by the Engineer and as shown on the <br /> Drawings. All pipe shall be placed on a firm foundation so as to prevent subsequent settlement, <br /> and the trenches will be carefully excavated to the proper grade, except where rock excavation <br /> ' is encountered, so that it will be unnecessary to fill in under the pipe. Bell holes shall be <br /> provided for all pipe laying modes and special care shall be exercised in obtaining full barrel <br /> support. <br /> 11. Pioe Laying —Vitrified Clay Pine. All materials for laying and jointing the pipe in the trench <br /> shall conform to the specifications for such materials hereinbefore given, and will be furnished <br /> by the Contractor. Grade lines for aligning and grading the pipe in the trench will be established <br /> ' by the Engineer, and all material and labor required will be furnished by the Contractor. <br /> Previous to being lowered into the trench, each pipe shall be inspected by the pipe foreman, <br /> and faulty pipe rejected and removed from the work. No pipe shall be laid in the trench until the <br /> Engineer has been notified of the intention of the Contractor to lay pipe, giving the Engineer <br /> sufficient time to check the lines and grades before pipe laying is begun. The Contractor shall <br /> notify the Engineer at least three days before work is to begin. <br /> ' Extra strength Vitrified Clay Pipe, as hereinbefore specified, shall be used regardless of the <br /> depth of trench in which it is to be installed. <br /> Class "B" Bedding shall be used in trench depths between 0 feet and 24 feet.All pipe installed <br /> in trenched greater than 24 feet shall be installed using Class"A" Bedding. <br /> ' Upon completion of the work,all lines shall present a clean and unbroken barrel,true to line and <br /> grade, and any defective lines shall be repaired and any deposits removed by the Contractor at <br /> his own expense. <br /> 12. PVC Gravity Sewer Pine(SDR 35). PVC gravity sewer pipe shall be installed using a Class <br /> "B" bedding as shown on the plans with a select backfill material to the springline of the pipe. <br /> Minimum cover over PVC sewer pipe shall be 3-feet to any subgrade elevation. <br /> ' Select backfill material is defined as stabilization stone(Size No. 67) <br /> ' SANITARY SEWER LINES: DETAILED SPECIFICATIONS FOR INSTALLATION SS-5 <br /> 10/15/09 <br />