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i <br />4D <br />granular backfill not exceeding 112 'inch in particle :size. Care shall be exercised <br />during backfilling, compaction to ensure that sharp or heavy rocks do not come <br />` into contact with tite tubing. <br />Where possible all service taps into the mainline shall be made 301 above <br />perpendicular to the pipe axis. Under no circumstances shall the tapping angle <br />exceed 45o above perpendicular. successive taps into the mainline shall be <br />spaced a minimum 18 inches apart. <br />" All water service tubing crossing under roadways shall be installed in schedule <br />40 PVC casing pipe in accordance Willi the Drawings. Casing pipe to be <br />installed under existing asphaltic surface courses shall be jack and bored as further <br />specified in these Documents, or by following a pneumatically burrowed hole <br />such as made by a "Pierce Arrow". <br />' <br />B. Installation of Delectable Buripd WarninXTape <br />'rape shall be tied to each valve or fitting and shall run continuously with no <br />splices between valves or fittings. Tape shall be placed at a maximum depth of <br />I 12 inches below finished grade directly above the pipe centerline. <br />Following placement of tape, the trench shall be backfilled with due caution to <br />prevent displacement or damage to the tape. <br />{ <br />C. Installation of Detectable Buried Trace Fire <br />'trace wire shall be installed on all pipe, valve and fittings, with splices. branches, <br />connections and terminations as shown on tite plans. <br />0 <br />