Guangxi Province, Liuzhou City, a chemical enterprise's site heavy metal pollution treatment project, covering an area of 120,000 square meters. The waterproofing structure from bottom to top is as follows: 4,800g waterproof geotextile, 2.0mm geomembrane, 6.3mm composite drainage grid, 600g geotextile, followed by 1,000mm of planting soil. After completion of construction, an integrity test of the waterproofing lining was conducted on-site. During the test, five leakage points from mechanical compaction were found. After waterproofing repairs, the project passed the leakage detection of the waterproofing system. The project was successfully inspected and approved by the owner and the supervisory party.