Obtain aggregates from sources participating in the Department's Aggregate QC/QA Program as described in Section 1006. Obtain aggregates from pre-approved sources, or have the source approved before use. Approval of such sources is based not only on the quality of the aggregate, but also on satisfactory production facilities and procedures. A list of approved aggregate sources participating in the Department's Aggregate QC/QA Program in Section 1005. North Carolina and adjoining states is available from the Materials and Tests Unit. This list includes aggregates meeting Specification requirements but whose use is restricted due to history of unsatisfactory service performance. Use of aggregates is allowed in the work provided they have been properly stockpiled in units of not less than 300 tons, tests of representative samples of these aggregates indicate satisfactory compliance with the Specifications and the source meets all the requirements of the Aggregate QC/QA Program. For any questions regarding this bid, please contact Kelly Satterfield, at ksatterfield@owasa.org. Handle and stockpile aggregates in such a manner to minimize segregation. Provide sites for aggregate stockpiles that are cleared, grubbed and cleaned with a firm, smooth and well drained ground surface. Maintain a cover of at least 3" of aggregate over the ground surface to avoid the inclusion of soil or foreign material. Operate trucks or other equipment on a stockpile in an acceptable manner. Space or separate with suitable walls or partitions stockpiles of different types or sizes of aggregates to prevent the mixing of the aggregates. Identify stockpiles with signs that can be read from a distance of at least 50 ft from the pile. Do not allow the stockpile to become contaminated with foreign matter or degrade excessively. Failure of aggregate samples to meet all gradation requirements due to excessive degradation will be determined by sieve tests of samples taken from any portion of the stockpile and iscause for discontinuance of such stockpiling procedure. Use material that consists mainly of rock dust produced through normal handling of the aggregate and that is essentially free from clay orshale.
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