​ The three steps of sampling

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The three steps of sampling: 1. Determining the sampling plan. The sampling plan includes: 1) The selected sampling locations; 2) The sampling tests to be conducted; 3) The frequency of sampling; 4) The timing of sampling; 5) The sampling methods; 6) The sampling routes; 7) The personnel involved in sampling and their roles; 8) The equipment used for sampling; 9) The transportation means; 10) Safety measures. 2. Preparations before sampling: 1) Understanding the purpose of the sampling task; 2) Knowing the requirements for sampling; 3) Familiarizing oneself with the surroundings of the monitoring sites; 4) Mastering the sampling methods; 5) Knowing the tests that need to be performed; 6) Being aware of the measures to ensure sampling quality; 7) Understanding the techniques for storing samples; 8) Determining the appropriate amount of samples to collect; 9) Preparing all necessary materials and supplies before sampling. 3 Sample collection: 1. Sampling must meet the relevant standard requirements. 2. Necessary quality control should be applied to the sampling preparation work and the sampling process itself. 3. Auxiliary devices such as positioners or cameras should be used to confirm the location of the sampling points. 4. Complete sampling records must be filled out