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u r 334 -3.3 Mix Design Revisions: During production, the Contractor may request a target value revision to a mix design, subject to meeting the following requirements: (1) the target change falls within the limits defined in Table 334 -3, (2) appropriate data exists demonstrating that the mix complies with production air voids specification criteria, and (3) the mixture gradation meets the basic gradation requirements defined in 334 - 3.2.2. Table 334 -3 Limits for Potential Adjustments to Mix Design Target Values Characteristic Limit from Original Mix Design No. 8 sieve [2.36 mm] and Coarser ± 5.0 percent No. 16 sieve [1.18 mm] ± 4.0 percent No. 30 sieve [600pm] ± 4.0 percent No. 50 sieve [300,um] ± 3.0 percent No. 100 sieve [150 /im] ± 3.0 percent No. 200 sieve [75 ,um] ± 1.0 percent Asphalt Binder Content (1) ± 0.3 percent (1) Reductions to the asphalt binder content will not be permitted if the VMA during production is lower than 1 .0 percent below the design criteria. Submit all requests for revisions to mix designs, along with supporting documentation, to the Engineer. In order to expedite the revision process, the request for revision or discussions on the possibility of a revision may be made verbally, but must be followed up by a written request. The verified mix design will remain in effect until the Engineer authorizes a change. In no case will the effective date of the revision be established earlier than the date of the first communication between the Contractor and the Engineer regarding the revision. A new design mix will be required if aggregate sources change, or for any substitution of an aggregate product with a different aggregate code, unless approved by the Engineer. Ul 334 -4 Contractor Process Control. Assume full responsibility for controlling all operations and processes such that the requirements of these Specifications are met at all times. Perform any tests necessary at the plant and roadway for process control purposes. The Engineer will not use these test results in the acceptance payment decision. Address in the Quality Control Plan how Process Control failures will be handled. Investigate, at a minimum, the production process, testing equipment and /or sampling methods to determine the cause of the failure, and make any necessary changes to assure compliance with these Specifications. Obtain a follow up sample immediately after corrective actions are taken to assess the adequacy of the corrections. In the event the follow -up Process Control sample also fails to meet Specification requirements, cease production of the asphalt mixture until the problem is adequately resolved to the satisfaction of the Engineer. 334 -5 Acceptance of the Mixture. 334 -5.1 General: The mixture will be accepted at the plant with respect to gradation (P -a and P -Zoo), asphalt content (Pb), and volumetrics (volumetrics is defined as air P n ., March 2007 01000 -58 03- 4122.D �,;.