2008-213 (5) - Laserfiche WebLink

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L accepted Bid Documents. All material that is brought in from other sources for backfill shall be at the price set forth in the Contract. 3. Excavated material to be used for backfill shall be neatly deposited at the sides of the trenches where space is available to protect against caving or sloughing into the trench. Where stockpiling of excavated material is required, the Contractor shall coordinate the site location with the Engineer and shall maintain his operations to provide for natural drainage and not present an unsightly appearance. No excavated material shall be placed on private property without the consent of the property owner. D. Compaction Methods 1. Mechanical compaction shall be accomplished using pneumatic or gasoline -powered tampers or flat -plate vibrators. Self propelled rollers may be used with the exception that the first two feet of backfilling over the pipe shall be compacted by hand- operated tamping devices. 2. Flooding or puddling with water to consolidate backfill is not acceptable, except where sand is encountered below unpaved areas only, and only with prior approval by the Engineer. The flooding or puddling operation shall be repeated with each two feet of backfill placed. E. Density Tests 1. The Contractor shall arrange to have sufficient soil tests made by an independent testing laboratory selected by the Engineer to demonstrate conformance of his work with the stability and compaction levels required by these specifications. Compaction tests shall be taken at intervals listed herein or as deemed necessary by the Engineer. All test results shall be signed and sealed by a Florida Registered Engineer, and a copy provided to the Owner and Engineer. 2. Any proposed alternative test methods to those specified herein must be approved by the Engineer prior to testing. At the request of the Engineer, the Contractor shall provide such documentation of a proposed alternative test method as the Engineer may require to evaluate the method for approval. 3. In no case shall the Contractor proceed with construction on compacted material until the tests prove satisfactory and approval is given by the Engineer. 4. In general, at least one test for maximum dry density/optimum moisture content shall be performed on representative samples of each inherently different material to be used for compacted backfill or embankment fill. For material of uniform composition and textural class, a minimum of two test locations per mainline run between manholes shall be performed. 5. As a minimum, in-place density tests shall be performed at the following rates on the compacted backfill, and shall be taken in one foot intervals beginning at one foot above the pipe and ending at the final grade. Test locations shall be as directed by the Engineer or his authorized representative. For material of uniform composition and textural class, a minimum of one test location per 02530-7 02530 - Gravity Sanitary Sewer Piping