北京污染场地治理全国领先（Beijing pollution control over the country leader）The management of contaminated sites in Beijing is a good beginning in the country. Enterprises in Beijing have realized that if the soil pollution is not controlled, the final land price will be reduced.Text / lookout Newsweek reporter Liu WeiIn the brief history of soil pollution control in Beijing, the story of three subway exploration workers in 2004 was a little-known turning point.This year at noon on April 28th, Beijing Songjiazhuang metro construction site exploration workers are digging construction. When three workers in pit 31 dug 3 meters below the surface, they smelled a strong pungent smell.As the builders had planned ahead, three workers wore gas masks. When the pit was dug to 5 meters deep, three per capita symptoms appear, one of them began to vomit.Subsequently, three workers were sent to the Tie Ying Hospital, one of the most serious symptoms received hyperbaric oxygen treatment, discharged to 4 pm the same day. The other two had mild symptoms and returned to the site after a simple treatment.The scene is a Beijing pesticide factory site, the pesticide factory in the last century at the end of 70s and early 80s, by the Beijing Red Lion paint factory merged.This is the beginning of Beijings emphasis on site (soil) pollution, which was 2004. Beijing Municipal Environmental Protection Bureau solid waste management center deputy director Li Lixin told the lookout Newsweek reporter, in 2005, Beijing launched a potential pollution site investigation.Pollution greenhouseAt noon on February 23rd, Li Lixin took the correspondents to contaminated soil in Changping District city of Beijing Nankou town stores. Beijing construction environmental restoration company built a temporary storage of contaminated soil here in the greenhouse.Reporters traveling in Beijing city of Beijiao Road, suddenly on the side of the road, through the early spring sparse forest branches, see the side of the road within the walls, a huge white cube, a pillow, the volume can reach a scale of indoor games. Construction environment restoration company general manager Gao Yanli told reporters, this is the storage of contaminated soil greenhouses.A few minutes later, after a gate, the entrance side of the off-road vehicle parked in the shed, shed 150 meters long, 50 meters wide, 25 meters high, can accommodate seventy thousand or eighty thousand of the greenhouse soil, from the bottom of cement paved, complete with greenhouse soil isolation. The greenhouse itself adopts high polymer flame retardant material and inflatable film.The shed was less than a month old. A total of more than 70 thousand tonnes of contaminated soil have now been loaded. These soils have been shipped from the site of the former Beijing dye factory.Beijing Dyestuff Factory was established in 1956 to produce disperse dyes, vat dyes and organic pigments. Dye factory site accepted environmental assessment, it was confirmed that the main pollutants are heavy metals, semi volatile organic compounds and some dyeing dyes pollution, its pollutants are harmful to the environment and human health.In November 2008, the Beijing Land Resources Bureau and the Beijing Municipal Environmental Protection Bureau carried out an open tender for the pollution restoration project of the block. Beijing construction environment restoration company won the bid. This is the fourth case of the company involved in the soil remediation project in Beijing.This reporter in the greenhouse entrance not far from the cottage, put on a white protective clothing, wearing gas masks, and two staff into the greenhouse. The entrance of the greenhouse is divided into two layers, similar to the lock. Into the outer door, the outer door is closed, the inner door, double door can effectively prevent greenhouse air leakage, to prevent pollution two.After two layers of shutter door into the greenhouse, the reporter found himself in a vast space of white fog, can not see the scene in the greenhouse. The staff said there was steam in the fog as well as volatile matter in the soil.A few minutes later, the reporter saw the scene, several excavators are open enough horsepower to mound to higher ground, the staff said that the soil to heap to 20 meters high, in order to shed more into the soil.The driver in the excavator, like reporters, was wearing protective clothing,The difference is that they carry oxygen cylinders back and forth every two hours and take turns to ensure health and safety.Gao Yanli said that in the greenhouse within 10000 tons of contaminated soil, thermal analysis method will be used for disposal, the technology can meet the remediation standards of contaminated soil, and does not destroy soil composition.In fact, a part of contaminated soil from the former Beijing dye factory has been sent to the cement burning kiln affiliate