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<br />A. Excavation shall be unclassified and shall include materials encountered in the excavation <br />of trenches for pipe installation. The trench shall be of sufficient width and depth for <br />installation of the pipe as indicated herein and cause minimum disturbance to existing <br />conditions. Bore under existing pavement and sidewalks rather than cut and restore. No <br />pavement shall be cut without written approval. <br /> <br />B. Pipe shall be delivered and stored on the job site with suitable protection against any <br />damage to pipe and fittings. <br /> <br />C. Trenches shall be made wide enough to allow a minimum of six (6) inches between <br />parallel pipe lines. Trenches for pipe lines shall be made of sufficient depths to provide <br />the minimum cover from finish grade as follows: <br /> <br />1. 36" minimum cover over all sleeved lines routed under pavement. <br />2. 12" minimum cover over all lateral lines routed in landscaped areas. <br />3. 18" minimum cover over main lines to 2.5", 24" minimum cover over main lines <br />3" and above. <br />4. Allow for sufficient width of excavating and working in trenches made in soft soil. <br /> <br />D. Pipe and fittings shall be carefully inspected before installation in the trench. Rocks over <br />1" diameter and unsuitable bearing material shall be removed from trench. <br /> <br />1. Solvent welded joints shall be made only on clean, dry, square cut, smooth pipe <br />sections. The fitting shall be "dry" tested for proper size before solvent is <br />applied. The assembly shall proceed in strict accordance with recommended <br />procedures furnished by the manufacturer. <br />2. Solvent welded pipe sections shall be "snaked" from side to side in the trench to <br />prevent joint rupture due to thermal contraction. <br />3. Pipe openings shall be plugged during construction to prevent entrance of <br />foreign material. <br /> <br />E. Place pipe to be installed under roadways, sidewalks, walls, stairs or other hardscape <br />areas in a SCH 40 PVC sleeve which has an inside diameter of not less than one inch <br />larger than the outside diameter of the pipe or the combined outside diameter of pipes <br />installed. Extend sleeve at least 24" beyond edge of pavement and stabilize for <br />construction. Verify locations with other contractors and notify Consultant or City's <br />representative immediately of any conflicts. <br /> <br />F. Backfill shall be carefully placed to avoid pipe dislocation. Backfill material shall be free of <br />rocks, stumps, roots and other unsuitable material. Backfill shall be placed in six inch <br />(6") lifts and shall be thoroughly compacted, except in areas to receive trees and shrubs. <br />Backfill under pavement or sidewalks shall be compacted to 98% of maximum A.A.5.H.O. <br />T-180 density. The surface of backfilled trenches shall be even with the surrounding <br />ground surface. <br /> <br />3.03 SPRINKLER HEAD INSTALLATION <br /> <br />A. The plans are schematic in nature. Place sprinkler heads, adjust nozzles, spray patterns <br />and make adjustments that may be required to give the landscaped areas full, complete <br />and proper coverage and distribution of water, and to meet manufacturer's requirements <br />for even precipitation rates. <br />B. Install sprinkler heads to minimize vandalism. <br /> <br />PAGE 113 OF 130 <br />BID No. 08-10-01 <br />