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I E. The pipe and fittings shall be carefully inspected before installation of the trench. All rocks over two -inch (1/2 ") diameter and unsuitable bearing material shall be removed from trench in strict accordance with the manufacturer's recommendations. Solvent - welded joints shall be made only on clean, dry, square cut, smooth pipe sections. The fittings shall be "dry" tested for proper size before solvent is applied. The assembly shall proceed in strict ' accordance with recommended procedures furnished by the manufacturer. 2. Solvent - welded pipe sections shall be "snaked" from side to side in the trench to prevent joint rupture due to thermal contraction. I 3. Pipe openings shall be plugged during construction to prevent entrance of foreign materials. F. Backfill shall be carefully placed to avoid pipe dislocation. Backfill material shall be free of rocks, stumps, roots, and other unsuitable material. In planting areas, the top six inches (6 ") shall be suitable planting soil. Backfill shall be placed in six -inch (6 ") lifts and shall be thoroughly compacted, except in planting area where planting soil is used. Backfill under pavement or sidewalks shall be compacted to ninety -eight percent (98 %) of maximum A.A.S.H.O. T -180 density. The surface of backfilled trenches shall be even with the surrounding ground surface. Plant locations shall take precedence over sprinkler and pipe locations. The IC shall coordinate the routing of lines and final head locations with the placement of specimen trees and shrubs. 3.03 SPRINKLER HEAD INSTALLATION A. The IC shall be responsible for the exact location of all sprinkler heads, acknowledging that the plans are schematic in nature. The IC shall accordingly place all sprinkler heads, adjust all nozzles, spray patterns, and make whatever other adjustments that may be required to give the landscaped areas full, complete, and proper coverage and distributions, and to meet all manufacturer's requirements. The IC shall make all such adjustments and additions solely at his expense. B. Sprinkler heads located along curbs and edges of paving shall be installed six inches (6 ") from back -of -curb or paving; except along roadways without curbs, sprinkler heads shall be located eighteen inches (12 ") from edge of 1 pavement. I 07/06 02810 -17 05 -5564