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1 O • <br />Testing requirements for sluny and backfill are as follows (and are outlined in Table l): <br />A. Materials <br />1. Bentonite: Certification of compliance with the specifications shall be obtained from the <br />material manufacturer. <br />2. Backfill Mix: Backfill material shall be tested prior to placement in the trench by <br />conducting tesss to determine slump and gradation. Testing fiequency will be as directed <br />by the Engineer with a minimum of one series of tesss per 200 cubic yards of backfill <br />material prepared for introduction in the trench. <br />B. Slurry Introduced in the Trench <br />A complete series of tests shall be conducted on slurry from the pond containing slurry ready for <br />introduction in the trench at least once per shift or each time a pond is prepared. The tests shall <br />include: <br />- pH of the slurry, <br />- Unit weigh[ of the slurry, <br />- Filtration lass of the slurry, and <br />- Viscosity of the slurry. <br />C. Slurry in the Trench <br />Sluny in the trench shall be tested at least once per shift. Samples shall be obtained from near the <br />bottom of the trench near the point of trenching and tested for unit weight and sand content. <br />END OF SECTION <br />01/99 Section 02(68 -Page 5 of 5 <br />