The most famous brownfield (also known as poison land) incident in the United States is the Ralph Canal Community case. At the end of 1970s, families living in this residential area suffered from abortion, stillbirth, neonatal malformation and defects, and adults also developed various tumors. After investigation, the conclusion is that the community used to be a large landfill full of chemical waste. Without restoring the land, it was sold to the local education department, and schools and residential quarters were built on the ground. This incident also promoted the promulgation of the American brown zone legislation "Super Fund Act". On April 28th, 2004, three workers were poisoned while working underground at the Songjiazhuang subway site on the South Third Ring Road in Beijing, and were taken to the hospital. One of the most severe symptoms was treated with hyperbaric oxygen chamber. The scene of the accident was the original site of a pesticide plant, which was merged by Beijing Hongshi Paint Factory in the late 1970s and early 1980s. In February 2006, a real estate project in Wuhan started, and workers were exposed to deep soil poisoning during pile foundation operation, resulting in vomiting and dizziness. After investigation, the conclusion is that the land is polluted by pesticides and chemicals, and the construction must be stopped immediately. This land originally belonged to pesticide plant, Wuhan. It has been produced and operated here for decades, and there have also been major chemical leakage accidents. In 2003, pesticide plant moved out after restructuring. In 2005, Wuhan Land Reserve Center completed the land acquisition and reserve work. In 2006, Sanjiang Real Estate Company won the bid with 405 million yuan. Since then, Sanjiang Real Estate Company has taken Wuhan Land and Resources Bureau to court, and finally got compensation of 65.438+0.2 billion yuan to recover the plot. In the Wuhan Poisonous Land Incident, the investigation of relevant departments showed that the soil there contained a large number of chemical components of banned organophosphorus and organochlorine pesticides. The biggest feature of this component is its strong chemical stability, which is difficult to degrade even if it is buried deep underground. The Wuhan Land Reserve Center believes that the major mistake at that time was that there was no environmental assessment and investigation when the land was collected and stored. It was not until the developer was poisoned in the construction that the largest "poisonous land" in the country finally retreated. In July 2006, a chemical company located in Guoxiang, near the South Ring Road in Suzhou, Jiangsu Province, moved, leaving 20 mu of polluted land, and six road builders fell into a coma while digging toxic soil. Su Hua factory was established in 1956. It was once a large state-owned first-class enterprise and moved to Zhangjiagang in 2003. Since 2006, the company's headquarters has gradually stopped production. Before August 3, 2007, the company had dismantled more than 0 sets of chemical production devices 10, such as chlorobenzene, acetic anhydride, imidacloprid, glyphosate and ion-exchange membrane caustic soda. At the end of the year, methamidophos, phosphorus trichloride and other devices were also successfully dismantled. Although the workshops and warehouses of Su Hua factory have been moved away, the soil in these areas is likely to contain toxic and harmful chemicals such as methamidophos and benzene chloride, and the residual chemicals will not only pollute the shallow soil, but also affect the deep soil and even groundwater. 2011May 27th, Heshan, Hanyang, Wuhan, the original soil remediation project of Wuhan pesticide factory is under way. A new residential area has been built next to this "poisonous land".