Xin'an Evening News Anhui.com Dawan Client News Huangshan Xinguang Factory (formerly Shanghai Lao Third Line Factory) in Dongchong Village, Xikou Town, Xiuning County, Huangshan City has a history of more than 50 years. It has caused heavy metal pollution to underground soil during long-term production. The factory is adjacent to the upper reaches of Xin'an River and the Yuetan Reservoir, a national large-scale water conservancy project that has stored water. In order to protect the clear water of a river, tens of millions of yuan were invested last year for soil treatment. Recently, the project's effect evaluation report was released to the society, saying that the restoration effect has met the relevant national requirements and meets the planned uses, and the plot can be safely used.
htmlOn February 22, Xin'an Evening News Anhui.com Dawan client reporter learned from Yuetan Lake tourism operation company that during Yuetan Lake tourism development, it will be appropriately used based on the actual situation of the plot and the characteristics of the ground architectural style.The predecessor of Huangshan Xinguang Factory, modern
The predecessor of Huangshan Xinguang Factory, was an accessories production base established in 1966. In 1986, the factory closed and handed over the assets to the local area. Later, the state-owned enterprise Huangshan Xinguang Stainless Steel Materials Products Co., Ltd. (hereinafter referred to as "Huangshan Xinguang Factory") was established. In 2000, it was converted into a mixed-ownership enterprise with employee shareholding; in 2010, it was converted into a private enterprise. In 2016, production was completely stopped and the equipment was being demolished. In early summer 2020, Xin'an Evening News Anhui.com Da'an client reporter visited the industrial buildings remains of the plot. Some of the industrial historical buildings have unique styles and are of great protection and utilization value.
This enterprise is 1.4 kilometers away from the birthplace of Xin'an River upstream of Yuetan Reservoir. It is located on the boundary of the Yuetan Reservoir planning area and does not belong to the water source protection area. In the long-term production of enterprises, heavy metal pollutants have left behind on underground soil and other pollutants. Soil pollutants in the plot may flow into Xin'an River along the surface and then flow into Yuetan Reservoir, affecting its water quality safety.
Huangshan Yuetan Reservoir is lowered to store water at the end of 2020, providing Huangshan people with reliable drinking water sources, taking into account flood control and irrigation, and developing water-related tourism formats. When the Yuetan Reservoir was built, it was decided to systematically control the heavy metal pollution sites in the plot before the reservoir was stored. In December 2019, Beijing Gaoneng Times Environmental Technology Co., Ltd. won the bid for the restoration project, with a winning bid of 12.181896 million yuan. On September 4, 2020, the restoration and treatment of all contaminated soil on site was completed, and the soil restoration project on the site was completed and accepted.
Fluoride and heavy metal arsenic have seriously exceeded the standard
On January 27, 2021, in accordance with the information disclosure requirements, the "Effect Evaluation Report of Site Soil Restoration Project of Huangshan Xinguang Stainless Steel Materials Products Co., Ltd." was released publicly. Xin'an Evening News Anhui Network Da'an Client reporter checked the report and learned that the project plot is adjacent to the county road on the west side, with a small number of retail investors on the northwest side, and an employee dormitory building on the southwest side (has moved out and a small number of left-behind elderly people live), and hilly landforms on the east, south and north sides.
According to evaluation and detection, the soil exceeds the standard substances mainly include heavy metals cobalt, chromium, nickel, arsenic, hexavalent chromium, organic PAH polycyclic aromatic hydrocarbons, and petroleum hydrocarbons (C10-C40) at S5 point exceeding the standard, and fluoride at U16 point exceeding the standard. In some points, fluoride exceeds the standard by 21.16 times, nickel exceeds the standard by 2.97 times, cobalt exceeds the standard by 1.06 times, and arsenic exceeds the standard by more than 1 times. The maximum pollution depth at the point is 4.5 meters. The above pollutants are at risk of carcinogenicity and need to be repaired. Among them, the waste residue samples at the detection point include 13 heavy metals, cyanide, fluoride, hexavalent chromium, total petroleum hydrocarbons, volatile organics and semi-volatile organics. The heavy metal molybdenum exceeds the standard value by 1.53 times, which may cause pollution. After risk assessment, the pollution risk of groundwater pollutants is an acceptable risk level, and repairs are not required if the planned land use method (land for commercial service facilities) does not change.
repair results meet the repair scope and national relevant requirements
According to the repair process and technical requirements, a total of 10,349 cubic meters of contaminated soil and 48 cubic meters of molybdenum slag were repaired. It mainly adopts chemical reduction, curing/stabilizing, chemical oxidation and other processes. In accordance with the requirements of the restoration technical plan, the construction unit will repair and treat the contaminated soil in the project site. The actual amount of clearing and repaired earth is greater than the estimated project volume, meeting the restoration scope and achieving the restoration goal.The potential pollution in the plot is cut off from the two aspects of pollution sources and pollution pathways. The continuous impact of the 178 factors on the water quality of Yuetan Reservoir is ensured, and the human health risk of the plot is acceptable.
After repair, the pollutant concentration and leaching concentration in the soil and waste residue in the site are less than the repair target value, and the repair effect has met the relevant national requirements. Meet planned uses and the plot can be used safely. After the restoration is completed, the plot will be planned for Class II land. At the same time, the "Repair Project Effect Evaluation Report" also clearly states that risk control is carried out on the soil and groundwater in the blocked landfill area, and groundwater must be monitored dynamically as required, and the monitoring indicators include at least nickel, cobalt, arsenic, fluoride, hexavalent chromium, total chromium, molybdenum, lead and zinc. Baogai also has clear requirements for on-site soil management in blocking landfill areas.
reporters have initially learned that in the development of Yuetan Lake tourism, it is planned to make appropriate use based on the actual situation of the plot and the characteristics of the ground architectural style.
Xin'an Evening News Anhui.com Dawan Client Reporter Wu Yongquan Photography Report
Editor Zhang Dawei
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