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D . Detectable Buried Trace Wire Trace wire shall be continuous # 14 THHN, single conductor copper wire . PVC color sheathing shall meet the color code of the "American Public Works Association" (APWA) . E . Foundation Rock A sieve analysis of the limerock shall conform to the following limits : Passing 1 " - 100% Passing 3 /4 " - 90 - 100% Passing 3 /8 " - 20 - 55 % Passing #4 - 0 - 10% Passing # 8 - 0 - 5 % 3 . INSTALLATION A . General Requirements 1 ) All work shall be proved to be in first class condition and constructed properly in accordance with the Drawings and Specifications . All defects and leaks disclosed by required testing shall be remedied. All tests shall be performed by the Contractor and observed by the Engineer. 2) All pipe and structures shall be installed on dry, firm bedding . The free water surface shall be shall be lowered to at least 12 inches below the bedding surface prior to placing pipe or structures and shall be maintained at that depth throughout bedding , haunching, and initial backfilling of the work. During subsequent backfilling , the water level shall be kept sufficiently below the working surface to allow compaction of backfill to the required density, and until required density tests have been performed . 3 ) Temporary supports shall be installed for adequate protection and maintenance of all underground and surface structures, water lines , drains, and other obstructions encountered in the progress of the work. Any structure which may have been disturbed shall be restored upon completion of the work. 4) Blasting shall not be permitted except by written approval of the Engineer. 5 ) Trenching and subsequent backfilling within the general construction site shall be accomplished as expeditiously as possible in order to prevent trench decay and maintain a clear operational area. C :\DoHmload\techspec-02601 .doc SC601 -3