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1905.3.2 Performance and Approval
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All mix designs submitted for review and approval in accordance with Section 1905.3.2.2 shall be certified by the director of the approved agency or the quality control manager of the approved fabricator that performed the tests used to substantiate the mix design. In addition all mix designs shall be signed by an owner or officer of the concrete production facility.
Copies of the approved mix design(s) shall be maintained at the construction site by the contractor and made available to the department upon request. A copy of the approved mix design(s) shall be provided by the contractor to the licensed concrete testing laboratory performing the acceptance testing of the concrete at the construction site.