T/ACEF 261-2026 Technical specification for investigation and assessment of heavy metal pollution in river, lake and reservoir sediments

Scope

This document stipulates the evaluation principles and process, on-site investigation and sample processing, evaluation factors, evaluation methods, evaluation grading, and results for the investigation and evaluation of heavy metal pollution in sediments of rivers, lakes, and reservoirs. This document is applicable to routine monitoring and pollution assessment in environmental monitoring and evaluation, as well as the evaluation of heavy metal pollution in sediments in projects such as river dredging, lake dredging, and water body ecological restoration and management. 4. Evaluation Principles and Process 4.1 Evaluation Principles 4.2 Workflow 5. Preliminary Investigation 5.1 Data Collection and Site Survey 5.2 Sampling Point Layout 5.3 Sample Collection 5.4 Analysis and Detection 6. Preliminary Evaluation 6.1 Evaluation Methods 6.2 Evaluation Grading 6.3 Result Judgment 7. Detailed Investigation 7.1 Dense Point Layout 7.2 Sample Collection 7.3 Analysis and Detection 8. Final Evaluation 8.1 Evaluation Methods 8.2 Evaluation Grading 8.3 Result Judgment 9. Evaluation Report Appendix A (Information) Reference Values for Heavy Metal Evaluation Appendix B (Information) Example of Field Record for Sampling of Sediments in Rivers, Lakes, and Reservoirs Appendix C (Information) Statistical Presentation of Evaluation Results for Heavy Metal Pollution in Sediments

Development Information

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