Distinguish NRMCA ready-mix plant certification from the contractor's own quality-control responsibilities on a concrete flatwork pour

Steps

1. Recognize that NRMCA (National Ready Mixed Concrete Association) plant certification programs assess the producer's plant, equipment, and quality-management systems for consistently producing conforming concrete -- they do not certify or guarantee the placing contractor's finishing, jointing, curing, or flatness/levelness results.
2. Confirm the ready-mix supplier's plant certification and mix design documentation (batch tickets, approved mix design, delivery/discharge time records) as part of receiving-inspection QC, without treating plant certification as covering field placement quality.
3. Assign and document field QC responsibilities separately: slump/air/temperature testing at point of placement, cylinder/test specimen sampling, finishing-crew qualifications, curing application, and joint-sawing timing are the placing contractor's responsibility.
4. Use ACI flatwork craftsman certifications (Concrete Flatwork Associate/Finisher/Advanced Finisher) to document finishing-crew qualifications as part of the contractor's own QC program, distinct from the plant's NRMCA certification.
5. Set a clear QC chain of custody at the pre-slab conference describing what the producer certifies vs. what the contractor tests and documents, so a flatness, jointing, or curing dispute is not incorrectly attributed to bad concrete.