Bottom mud is usually a mixture of clay, silt, organic matter, and various minerals. It is formed by depositing at the bottom of the water body after a long time of physical, chemical, and biological action and water transmission. The sediment with a thickness of 0 to 15 cm on the surface is called surface sediment, and the sediment with a thickness of more than 15 cm is called deep sediment. Bottom mud is the sediment of rivers and lakes and an important part of natural waters. When the water area is polluted, part of the pollutants in the water can be stored in the bottom sludge through precipitation or particulate matter adsorption, and then released under appropriate conditions to become a source of secondary pollution. This type of pollution is called bottom sludge pollution. Test items: mercury, lead, cadmium, copper, zinc, chromium, nickel, arsenic and other heavy metals or inorganic non-metallic toxic substances, total nitrogen, total phosphorus, PH, moisture content, organic m

Soil monitoring is basically the same as water quality and atmospheric monitoring. The various physical and chemical properties of the soil are measured by appropriate measurement methods, such as iron, manganese, total potassium, organic matter, total nitrogen, available phosphorus, total phosphorus, moisture, total arsenic, available boron, Fluoride, chloride, mineral oil and total salt content, etc., to achieve the purpose of monitoring the status of soil quality; monitoring of soil pollution accidents; dynamic monitoring of pollutant land treatment; soil background value investigation. my country's "Soil Environmental Quality Standard" stipulates that 11 items of heavy metals, pesticides and pH are monitored. The "Technical Specifications for Monitoring Farmland Soil Environmental Quality" divides soil monitoring projects into three categories: mandatory testing items, selection mandatory testing items, and selection items. Select required test items and selected test items include

The "Law of the People's Republic of China on Soil Prevention and Control" was promulgated on August 31, 2018 and officially implemented on January 1, 2019. my country's soil prevention and control has ushered in a new situation, and local environmental protection regulatory agencies will continue to strengthen in accordance with the requirements of regulations Supervise soil pollution sources and establish a soil environmental monitoring system for enterprise land. Environmental investigations on soil sites have become a key task for soil prevention and control in various regions. Service Scope: Farmland soil environment inspection, soil environment inspection for construction projects, regional soil background value investigation, site investigation.

Solid waste: refers to the solid and muddy waste discharged into the environment by people during development, construction, production and operation, and daily life activities. According to different classification standards: 1. Chemical properties: inorganic, organic 2. Shape: solid, muddy 3. Hazard: general, toxic (dangerous) 4. Source: industrial, mining, municipal waste, agricultural solid waste monitoring Solid waste monitoring It is the process of monitoring and measuring solid waste. Solid waste refers to solid and semi-solid wastes that pollute the environment generated in production, construction, daily life and other activities. Industrial solid waste refers to solid waste generated in production activities such as industry and transportation. Urban domestic waste refers to the solid waste generated in urban daily life or activities that provide services for urban daily life, as well as laws and administrative regulations.

Radioactive pollution refers to the occurrence of radioactive substances or rays that exceed national standards on the surface or inside of materials, human bodies, places, and environmental media due to human activities. The harm of radioactivity to biology is very serious. Radiation injury has acute injury and chronic injury. If people are exposed to large doses of X-rays, gamma rays and neutrons in a short period of time, they will cause acute injury. Mild cases have symptoms such as hair loss and infection. When the dose is larger, gastrointestinal damage such as diarrhea and vomiting may occur. Under extremely high doses of radiation, central nervous system damage occurs until death. For the central nervous system, the main symptoms include weakness, fatigue, lack of desire, collapse, lethargy, etc. In severe cases, the whole body muscles tremble and cause epileptiform spasm. The small intestine with vigorous cell division is highly sensitive to ionizing radiation.

Environmental Impact Assessment Environmental impact assessment refers to the analysis, prediction and assessment of the possible environmental impacts after the implementation of planning and construction projects, proposes countermeasures and measures to prevent or reduce adverse environmental impacts, and methods and systems for tracking and monitoring. The purpose is to implement sustainable development strategies, prevent adverse effects on the environment after the implementation of planning and construction projects, and promote the coordinated development of economy, society and the environment. Environmental Impact Assessment Report Form Service Process: Environmental Impact Assessment Report Preparation Process: Environmental Supervision Environmental supervision means that the environmental supervision agency is entrusted by the project construction unit, based on the environmental impact assessment documents, the environmental protection administrative department’s approva