1, the test items of witness testing shall be specified in accordance with the requirements of relevant national administrative regulations and standards.
2. Witnesses should be professional and technical personnel with knowledge of construction inspection and test.
3, witness personnel changes, the supervision unit shall notify the relevant units, go through the formalities of change in writing.
4. For the testing items that need witness testing, the construction unit shall notify the witness before sampling and inspection.
5. Witnesses should witness the whole process of sampling and inspection, and fill in witness records.
6. The testing institution shall verify the witnesses and witness records when receiving the samples. If the witnesses are inconsistent with the witness records or the witness records are not signed by the witness records, it shall not accept the samples.
7. The witness shall check whether the test items, quantity and proportion of witness testing comply with relevant regulations.
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