Quality control sampling and testing. Testing performed by the contractor on samples taken by the contractor for process control which is used as a part of the acceptance decision as defined by the Schedule of Materials Control . Also known as QC testing or process control testing. Verification sampling and testing. Products which can be accepted based upon a manufacturer's certificate of compliance.
Common examples are asphalt, cement, fly ash, paint, and seed.
Products which can be accepted based upon a manufacturer's representation that a product complies with all contract requirements, usually identified by a product name. Common examples are concrete admixtures, joint sealers, raised pavement markers, and sign sheeting. Homogeneous samples that are distributed and tested by two or more laboratories. The test results are compared to assure that the laboratories are obtaining the same results. Laboratory testing or field companion testing.