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1 work background 1. 1 origin Jiangsu MO opto-electronic material Co., Ltd.(hereinafter referred to as aimou) is located at No.1 Qinglongshan Branch Road, international chemical industry park, Zhenjiang New Area, adjacent to xinchangyuan chemical industry in the south, Qinglongshan road in the East, Zhenda railway in the north and Saifei new materials in the West. The geographical coordinates are 119 degrees 37'28.10647 "east longitude and 32 degrees 950.05985" north latitude. It covers an area of 41000 square meters (61.5 mu), and the planned land type is class II construction land. Aimou belongs to the c3985 special electronic material manufacturing industry, specializing in the production of high-purity metal organic compounds (Mo sources) with independent intellectual property rights and special alk-aluminum catalysts for polyolefin/synthetic rubber industry, which can achieve alk-aluminum and high Pure Mo source is one of the large-scale production enterprises. The products of the enterprise are divided into two major sectors, namely, high-purity metal organic compounds (electronic chemicals) such as diethylzinc and alk-aluminum catalysts such as diethylaluminum chloride, of which the purity of diethylzinc products is more than 99.9999%. In order to effectively strengthen the prevention and control of soil pollution and gradually improve the quality of soil environment, the State Council formulated and issued the action plan for the prevention and control of soil pollution (Guofa [2016] No.31), referred to as the "ten soil articles". "Ten articles on soil" pointed out that in view of the current situation of soil pollution in China, we should "strengthen the protection of uncontaminated soil and strictly control new soil pollution." among them, in order to "prevent new pollution of construction land", "Since 2017, relevant local people's governments should sign letters of responsibility for soil pollution prevention and control with enterprises in key industries, clarify relevant measures and responsibilities, and make the letters of responsibility public to the public." and "strengthen daily environmental supervision. All localities should And pollution emissions, determine the list of key supervision enterprises of soil environment, implement dynamic updates, and publish them to the public. Enterprises on the list should conduct soil environmental monitoring on their own land every year, and the results should be made public to the public. Relevant environmental protection departments should regularly monitor the periphery of key regulatory enterprises and industrial parks, and upload data to the national soil environment information management platform in a timely manner, and the results should be used as an important basis for environmental law enforcement and risk early warning. " As one of the key regulatory enterprises in Zhenjiang City (see the list of key regulatory units of soil pollution in Zhenjiang City (Zhenhuan office 2021] No.4), aimou entrusted Jiangsu Yingtai Testing Technology Co., Ltd. to carry out self monitoring of its factory area in November 2022. According to the work flow stipulated in the technical guide for self monitoring of soil and groundwater in industrial enterprises (hj1209-2021), and according to the on-site survey and investigation, the self monitoring plan of soil and groundwater in the enterprise plot is prepared. 2 enterprise overview 2. 1 enterprise name, address, coordinates, etc Jiangsu MO opto-electronic material Co., Ltd.(hereinafter referred to as aimou) was registered in August 2010 and located at No.1 Qinglongshan Branch Road, international chemical industry park, Zhenjiang new area. The geographical coordinates are 119 degrees 37'28 "east longitude and 32 degrees 9'50" north latitude. It covers a total area of 41000 square meters (61.5 mu). The planned land type is class II construction land. Aimou belongs to the c3985 special electronic material manufacturing industry, specializing in the production of high-purity metal organic compounds (Mo sources) with independent intellectual property rights and special alk-aluminum catalysts for polyolefin/synthetic rubber industry. It is one of the large enterprises in China that can realize the large-scale production of alk-aluminum and high-purity Mo sources. The products of the enterprise are divided into two major sectors, namely, high-purity metal organic compounds (electronic chemicals) such as diethylzinc and alk-aluminum catalysts such as diethylaluminum chloride, of which the purity of diethylzinc products is more than 99.9999%. At present, the products have been widely used in polyolefins (Sinopec, PetroChina, coal chemical industry), synthetic rubber, microelectro The industrial park where aimou is located is a gathering area of chemical enterprises. Except that Qinglongshan road is an open space on the east side, the rest are chemical enterprises. Xinchangyuan chemical industry is on the south side, Saifei new materials is on the west side, and Zhenda railway is on the north side. It is across the road from Puyuan chemical industry, Cape chemical industry and Zhengdan chemical industry.nics and LED/OLED display and new energy battery industries 6 layout plan of monitoring points 6. 1 layout position of key units and corresponding monitoring points/wells 6. 1. 1 principle of distribution According to the results of preliminary data collection and analysis, on-site survey and personnel interviews, the principles for setting up site soil and groundwater monitoring points are as follows in accordance with the technical guidelines for self monitoring of soil and groundwater in industrial enterprises (hj1209-2021): 1. The layout of monitoring points shall follow the principle of not affecting the normal production of enterprises and not causing potential safety hazards and secondary pollution 2. The point shall be as close as possible to the key places or key facilities and equipment with potential soil pollution hazards in the key units. When the key places or key facilities and equipment cover a large area, they shall be as close as possible to the hidden danger points in the places or facilities and equipment that are most likely to be affected by the leakage, loss and dispersion of pollutants; 3. According to the geological survey data, if there is no soil available in the target sampling layer or the groundwater burial conditions are not suitable for sampling, the corresponding monitoring may not be carried out, but the geological survey data shall be provided and explained in the monitoring report. ① Soil monitoring point: · 1)Class I unit: in principle, at least one deep soil monitoring point shall be set around each concealed key facilities and equipment involved in class I unit, and at least one topsoil monitoring point shall be set inside or around the unit. · · 2)Class II unit: in principle, at least one topsoil monitoring point shall be set up inside or around each class II unit, and the specific location and quantity can be adjusted appropriately according to the size of the unit or the number and distribution of key places or key facilities and equipment in the unit. In principle, the monitoring points shall be set at the exposed soil, and the areas where rainwater is easy to converge and accumulate shall be taken into account. The units with pollution channels including dispersion shall also be determined in combination with the main settlement positions of pollutants. ② Groundwater monitoring log · 1) There shall be no less than one groundwater monitoring well corresponding to each key unit. In principle, the total number of groundwater monitoring wells (including control points) of each enterprise should not be less than 3, and try to avoid being in the same straight line. · · 2) The location and quantity of groundwater monitoring wells corresponding to the unit shall be determined according to the number and distribution of key places or key facilities and equipment in the key unit. The monitoring wells shall be arranged downstream of the pollutant transport path. In principle, the location and quantity of wells shall be able to capture the groundwater pollution that may be generated by all key places or key facilities and equipment in the unit. · · 3) Key places or key facilities and equipment that meet the relevant anti seepage technical requirements of HJ 610 and HJ 964 have been adopted on the ground, and the number of monitoring wells in their units can be appropriately reduced, but not less than one monitoring well. · · ③ Groundwater control point: · In principle, the enterprise shall set up at least one groundwater control point. The control point is arranged at the upstream of the groundwater flow of the enterprise land, which is set in the same aquifer as the pollutant monitoring well, and should be protected from the production process of the enterprise monitored by itself as far as possible. The groundwater control point and the groundwater pollutant monitoring well shall be set in the same aquifer. · 6. 1. 2 layout position of key unit points · Considering the requirements of the guidelines on the frequency of self monitoring, a total of 17 soil sampling points are set up in the self monitoring plan for this year. For key monitoring units and key facilities, 4 groundwater monitoring points (3 common points of water and soil, 1 separate groundwater) are set up, and 1 Soil and groundwater control point is set up upstream of the groundwater flow of the enterprise. The layout of sampling points should be as close to the pollution source as possible without affecting the normal production of enterprises and causing potential safety hazards and secondary pollution. See figure 6.1-1 for the layout of soil and groundwater sampling points.

1.1 Origin of Work Jiangsu MO opto-electronic material Co., Ltd. (hereinafter referred to as Aimou) is located at No.1 Qinglongshan Branch Road, International Chemical Industry Park, Zhenjiang New Area. It is adjacent to Xinchangyuan Chemical Industry to the south, Qinglongshan Road to the east, Zhenda Railway to the north, and Saifei New Materials to the west. The geographical coordinates are 119 ° 37 ′ 28.10647 ″ E and 32 ° 9 ′ 50.05985 ″ N, covering an area of 41000m2 (61.5 acres), and the planned land type is Class II construction land. IMOO belongs to the C3985 electronic specialized material manufacturing industry, specializing in the production of high-purity gold with independent intellectual property rights It belongs to the organic compound (MO source) and alkyl aluminum catalyst specialized in the polyolefin/synthetic rubber industry, and is one of the large enterprises in China that can achieve large-scale production of alkyl aluminum and high-purity MO sources. The company's products are divided into two major categories: high-purity metal organic compounds (electronic chemicals) such as diethyl zinc and alkyl aluminum catalysts such as diethyl aluminum chloride. The purity of diethyl zinc products is over 99.9999%. In order to effectively strengthen the prevention and control of soil pollution and gradually improve the quality of soil environment, the State Council has formulated and released the "Action Plan for Soil Pollution Prevention and Control" (Guo Fa [2016] No. 31), abbreviated as the "Soil Ten Articles". In response to the current soil pollution situation in China, it is pointed out in the "Soil Ten Articles" that "we should strengthen the protection of unpolluted soil and strictly control new soil pollution." Among them, it is "to prevent new pollution from construction land", Starting from 2017, relevant local people's governments should sign soil pollution prevention and control responsibility agreements with key industry enterprises, clarify relevant measures and responsibilities, and make the responsibility agreements publicly available to society Strengthen daily environmental supervision. Each region should determine the list of key soil environment supervision enterprises based on the distribution and pollution emissions of industrial and mining enterprises, implement dynamic updates, and make it public to the public. Enterprises included in the list should conduct soil environment monitoring on their own land every year, and the results should be made public to the public. Relevant environmental protection departments should regularly monitor key supervision enterprises and the surrounding areas of industrial parks, and timely upload data to the national soil environment The information management platform serves as an important basis for environmental law enforcement and risk warning. As one of the key regulatory enterprises in Zhenjiang City (refer to the "List of Key Soil Pollution Regulatory Units in Zhenjiang City" (Zhenhuan Ban [2021] No. 4), Aimou entrusted Jiangsu Yingtai Testing Technology Co., Ltd. to carry out self monitoring work on its factory area in November 2022. According to the workflow specified in the "Technical Guidelines for Self Monitoring of Soil and Groundwater in Industrial Enterprises" (HJ1209-2021), and based on on-site exploration and investigation, a self monitoring plan for the soil and groundwater in the enterprise plot is prepared. At the same time, self monitoring work is carried out according to the monitoring plan and a self monitoring report is ultimately formed. 2.1 Enterprise name, address, coordinates, etc Jiangsu MO opto-electronic material Co., Ltd.(hereinafter referred to as Aimou) was registered and established in August 2010, located at No. 1 Qinglongshan Branch Road, International Chemical Industry Park, Zhenjiang New Area. The geographical coordinates are 119 ° 37 ′ 28 ″ E and 32 ° 9 ′ 50 ″ N, covering a total area of 41000m2 (61.5 acres), and the planned land type is Class II construction land. Aimou belongs to the C3985 electronic specialized material manufacturing industry, specializing in the production of high-purity metal organic compounds (MO sources) with independent intellectual property rights and alkyl aluminum catalysts for the polyolefin/synthetic rubber industry. It is one of the large enterprises in China that can achieve large-scale production of alkyl aluminum and high-purity MO sources. The company's products are divided into two major categories: high-purity metal organic compounds (electronic chemicals) such as diethyl zinc and alkyl aluminum catalysts such as diethyl aluminum chloride. The purity of diethyl zinc products is over 99.9999%. At present, the product has been widely used in industries such as polyolefins (Sinopec, PetroChina, coal chemical), synthetic rubber, microelectronics, LED/OLED displays, and new energy batteries. The industrial park where EMO is located is a cluster area for chemical enterprises. Except for the vacant land on Qinglongshan Road on the east side, all other areas within its four boundaries are chemical enterprises. To the south is Xinchangyuan Chemical, to the west is Saifei New Materials, and to the north is Zhenda Railway, facing Puyuan Chemical, Kaipu Chemical, and Zhengdan Chemical across the road. 4.4 Situation of key locations, facilities and equipment The main structures in the factory area include Class A factory buildings, hazardous material warehouses, Class D warehouses, Class C warehouses, incinerator equipment areas, substations, etc. The ground in the factory area has been hardened and cofferdams have been set up to collect initial rainwater; At the same time, an emergency pool should be set up to prevent unexpected situations from occurring. The waste gas of this project mainly includes process waste gas (non condensable waste gas, vacuum exhaust gas) and incineration waste gas. Each production line is equipped with two-stage absorption tanks and liquid nitrogen deep cooling to collect and treat waste gas, which is then discharged into the atmosphere through a newly added exhaust funnel (P2). A total of three sets of waste gas treatment facilities are set up. White oil in the first level absorption tank; The secondary absorption tank is filled with three layers of materials, which are 50% NaOH layer+absorbent felt partition, calcium oxide+absorbent felt partition, and activated carbon+absorbent felt partition from top to bottom. The collection efficiency of "secondary absorption tank+liquid nitrogen deep cooling" is 99%. The incineration gas is finally discharged through a 25m chimney (P3) using a "waste liquid atomization system+fixed bed furnace for primary incineration → secondary combustion in the secondary combustion chamber → tube heat exchanger → quench neutralization tower → dry spraying device+drying tower → bag dust removal system → alkali spray tower → induced draft fan". The solid waste generated in the production process of enterprises mainly includes hazardous waste (incinerator slag, fly ash), household waste, and general solid waste. Hazardous waste is temporarily stored in hazardous waste warehouses and entrusted to Jiangsu Jiexia Environmental Protection Technology Co., Ltd. for disposal and utilization. According to the relevant requirements of the "Technical Guidelines for Self monitoring of Soil and Groundwater in Industrial Enterprises (Trial)" (HJ 1209-2021), survey work is carried out on the premise of understanding the information of various facilities within the enterprise. Conduct a comprehensive investigation and survey of the key objects of concern within the Emo factory area, with the focus on self monitoring of the company's internal environment. Compare the layout plan of the enterprise and investigate the distribution of all facilities on the plot to understand their internal structure, process flow, and main functions. Observe whether the surrounding areas of each facility are There is a possibility of pollution occurring. Implement relevant records, materials, on-site photos, etc. separately. For those who discover serious pollution situations, timely report to relevant institutions and responsible departments and handle them in a timely manner.3 4.4.1 Site Survey of Class A Factory Buildings The areas targeted for on-site inspection are mainly Class A Workshop 1 and Class A Workshop 2. The main focus is on whether there is any leakage of materials, whether the ground is hardened, whether there is special maintenance and regular testing, and whether there is a management plan for emergency accidents. The on-site inspection results are shown in Table 4.4-1. After on-site investigation, it was found that the floors of Class A Factory Building 1 and Class A Factory Building 2 are both cement hardened and impermeable, and the floors are flat. Class A Factory Building 1 has a small amount of leakage traces, and there is no leakage of pipeline valves; The production equipment is regularly maintained by professional personnel, and the company has relevant measures for emergency accidents. 4.4.2 Site Survey of Incinerator Workshop The area targeted for on-site inspection is mainly the incinerator workshop, which mainly focuses on whether there is any leakage of materials, whether the ground is hardened, whether there is special maintenance and regular testing, and whether there is a management plan for emergency accidents. The on-site inspection results are shown in Table 4.4-2 After on-site inspection, it was found that the floor of the incinerator workshop is hardened with cement for anti-seepage, and the floor is relatively flat with a small amount of leakage traces. There is no leakage of pipeline valves; The production equipment is regularly maintained by professional personnel, and the company has relevant measures for emergency accidents. 4.4.3 Site Survey of Tank Farm This item mainly investigates the hidden dangers in the storage tank area of the factory area, mainly focusing on whether there is any leakage in the storage tank, whether there is any leakage in the transportation pipeline and pump body, and whether there is a management plan for emergency accidents After on-site investigation, it was found that the ground of the storage tank area (liquid nitrogen tank) was hardened with concrete. There was no cofferdam built in the tank area, and there was no cracking or damage during the hardening process. The specific situation is shown in Table 4.4-3. The company regularly assigns dedicated personnel to inspect, and has relevant measures for emergency accidents, which may cause soil pollution. 4.4.4 Site inspection of hazardous material warehouses, hazardous waste warehouses, Class C warehouses and other hidden dangers in the factory area The on-site inspection mainly focuses on hazardous material warehouses, hazardous waste warehouses, Class C warehouses, and empty bottle warehouses, checking for special maintenance, regular testing, and management plans for emergency accidents in buildings such as roofs/coverings, floors, and enclosures. The on-site inspection results are shown in Table 4.4-4. After on-site inspection, it was found that hazardous material warehouses, hazardous waste warehouses, Class C warehouses, and empty bottle yards have all been equipped with rainproof and ground hardening facilities; The hazardous waste warehouse has diversion ditches and wastewater collection tanks, and solid waste is packaged and classified for treatment. In addition, the company arranges relevant personnel to regularly inspect the ground conditions, and the company has relevant measures for emergency accidents. 4.4.5 Site Survey of Emergency Accident Pool The on-site inspection focuses on whether the treatment pool in the factory area has undergone anti-seepage and leakage prevention treatment, whether there are special maintenance and regular inspections, and whether there is a management plan for emergency accidents. The on-site inspection results are shown in Table 4.4-5. Table 4.4-5 Site Survey of Emergency Accident Pool After on-site inspection, it was found that the emergency accident pool in the factory area is in good condition and free from cracking. The company regularly arranges dedicated personnel for inspection and maintenance, and has relevant measures for emergency accidents. 8. Analysis of monitoring results 8.1 Analysis of Soil Monitoring Results 8.1.1 Soil Environmental Quality Assessment Standards This survey selected the "Soil Environmental Quality Construction Land Soil Pollution Risk Control Standard (Trial)" (GB36600- 2018) Evaluate the content of detection factors in the soil of the plot. The "Soil Environmental Quality Construction Land Soil Pollution Risk Control Standard (Trial)" (GB36600-2018) was issued by the Ministry of Ecology and Environment of China and the State Administration for Market Regulation on June 22, 2018, and officially implemented on August 1, 2018. This standard divides land use types into two categories based on the exposure of protected objects: ****** land includes residential land (R) in urban construction land according to GB50137, primary and secondary school land (A33), medical and health land (A5), and social welfare facility land (A6) in public management and public service land, as well as community park or children's park land in park green space (G1); The second type of land includes industrial land (M), logistics and warehousing land (W), commercial service industry land (B), road and transportation facilities land (S), public facilities land (U), public management and public service land (A) (excluding A33, A5, A6), as well as green space and square land (G) (excluding community park or children's park land in G1) specified in GB50137. The monitoring plot is for industrial use, therefore, the soil pollutant risk screening standard for this project plot adopts the screening value (Class II land) standard in Table 1 of the "Soil Environmental Quality Construction Land Soil Pollution Risk Control Standard (Trial)" (GB36600-2018). The specific standard values are detailed in Table 8.1-1. 8.1.2 Monitoring results of each point From December 14th to 15th, 2022, complete the collection and submission of soil samples. A total of 33 samples were collected on site, including 3 parallel samples. A total of 12 monitoring surface samples (0.2m-0.5m) were collected, including BS1, BS2, BS3, BS4, BS5, BS6, BS7, BS8, BS9, BS10, BS11, and BS12. One soil sample was collected at each point; There are 6 soil columnar points with a depth of 6m, namely S0, S1, S2, S3, S4, and S5. Each point collects and monitors 3 soil samples, totaling 18 soil columnar samples. Three on-site parallel samples are set up for inspection. According to the monitoring results, heavy metals such as arsenic, mercury, cadmium, lead, copper, nickel, and zinc have been detected in soil samples, while hexavalent chromium is less than the detection limit; The volatile organic compound dichloromethane has been detected in soil samples; The characteristic pollutant petroleum hydrocarbons (C10-C40) have been detected. The test results are shown in Attachment 2, and the summary of the detection rates of pollutants in soil samples is shown in Table 8.1-2 8.1.3 Analysis of monitoring results (1) Basic physical and chemical properties test results total of 33 samples were analyzed for the basic physical and chemical properties of the soil within the plot, with a pH value between 7.33 and 8.06. According to the Technical Guidelines for Environmental Impact Assessment - Soil Environment (Trial) (HJ964-2018), there are no extremely alkaline (pH>9.5) or strongly alkaline (pH: 8.5-9.5) soil samples; 26 alkaline (pH: 7.5-8.5) soil samples, accounting for 78.79%; A total of 7 weakly alkaline (pH: 7.0-7.5) soil samples, accounting for 21.21%; Non acidic soil samples. In summary, the soil samples of our company are generally alkaline. (2) Heavy metal and inorganic substance detection results A total of 7 heavy metals were detected, including copper, nickel, lead, cadmium, mercury, arsenic, and zinc, with a detection rate of 100%, all lower than the screening value for the second type of land. (3) Organic matter detection results Volatile organic compound dichloromethane has been partially detected, mainly appearing at 3.5-6m of BS4, BS11, S0, S1 In the soil samples collected from S2, S3, S4, and S5, a ******* value of 25.2mg/kg was detected, which did not exceed the limit standard; The detection rate of petroleum hydrocarbons (C10-C40) is 100%, which is lower than the screening value for Class II land use. 8.2 Analysis of Groundwater Monitoring Results 8.2.1 Groundwater Environmental Quality Assessment Standards Currently, there is no risk-based groundwater risk screening standard in China. The Technical Guidelines for Site Environmental Investigation (HJ 25.1-2019) released by ***** in China stipulate the use of the "Groundwater Quality Standard" (GB/T 14848-2017) as the groundwater screening standard. Therefore, the relevant standard limits in the national standard "Groundwater Quality Standards" (GB/T14848-2017) are prioritized for the evaluation of groundwater environmental quality in this monitoring. The Quality Standard for Groundwater (GB/T14848-2017) was issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and the National Standardization Administration of China on October 14, 2017, and will be implemented soon on May 1, 2018. The new standard has been revised in conjunction with the revised GB 5749-2006 "Sanitary Standards for Drinking Water", the scientific research achievements of the Ministry of Land and Resources in the field of groundwater in the past 20 years, and international research achievements. The number of indicators has been increased, and the water quality monitoring factor indicators have increased from 39 in GB/T 14848-1993 to 93, an increase of 54 items; Adjusted 20 indicator classification limits and directly adopted 19 indicator classification limits; Reduced comprehensive evaluation regulations, making the standards more widely applicable. Based on the quality status of groundwater in China and human health risks, referring to the quality requirements for drinking water, industrial, agricultural and other water uses, and based on the content of each component (excluding pH), groundwater quality is divided into five categories: Class I: groundwater has low chemical composition content and is suitable for various purposes; Class II: Groundwater has a low content of chemical components and is suitable for various purposes; Class III: Groundwater with moderate chemical composition content, based on GB5749-2006, mainly suitable for centralized domestic drinking water sources and industrial and agricultural water use; Class IV: Groundwater has a high content of chemical components, and the quality requirements for agricultural and industrial water use are as follows: Based on a certain level of human health risk, it is suitable for agricultural and some industrial water use, and can be used as domestic drinking water after appropriate treatment; Class V: Groundwater has a high content of chemical components and is not suitable as a source of drinking water for daily use. Based on the fact that the monitored land is for industrial use and the future groundwater will not be developed and utilized, the Class IV standard in the "Groundwater Quality Standard" (GB/T 14848-2017) is adopted for the evaluation of groundwater environmental quality in this self monitoring. The specific standard limits are shown in Table 8.2-1. 8.2.2 Monitoring results of each point In this monitoring, 5 groundwater monitoring wells (including 1 control well) were constructed in the factory area, 5 samples were collected, and 1 parallel sample was set up. According to the monitoring results, multiple indicators in groundwater samples have been detected to varying degrees. The specific results are shown in Annex 2. The summary of the detection rates of pollutants in groundwater samples is shown in Table 8.2-2. 8.2.3 Analysis of monitoring results A total of 6 groundwater samples were collected within the project site, and the monitoring indicators cover the "Groundwater Quality Standards" (GB/T 35 sensory shapes, general chemical indicators, toxicological indicators, etc. in 14848-2017, 45 items in Table 1 of the "Soil Environmental Quality Construction Land Soil Pollution Risk Control Standard (Trial)" (GB36600-2018), and 23 water quality indicators were detected, including turbidity, pH, dissolved solids, total hardness, chloride, sulfate, permanganate index, ammonia nitrogen, fluoride, nitrate, etc Nitrite, iron, manganese, sodium, aluminum, zinc, copper, nickel, arsenic, iodide, dichloromethane, volatile phenols, and petroleum hydrocarbons; No other indicators were detected or below the detection limit. The detection rate of turbidity, pH, soluble solids, total hardness, chloride, permanganate index, ammonia nitrogen, fluoride, nitrate, sodium, aluminum, zinc, copper, nickel, and arsenic is 100%. Except for the total hardness index in W3 groundwater well exceeding the Class IV water standard, all other indicators meet the Class IV water standard in the "Groundwater Quality Standard" (GB/T 14848-2017). The detection rate of dichloromethane is 83.33%, meeting the Class IV water quality standard; The detection rate of petroleum hydrocarbons, volatile phenols, iodides, iron, manganese, and sulfates is 66.67%, among which the manganese in W0, W1, and W3 groundwater exceeds the Class IV water standard in the "Groundwater Quality Standard" (GB/T 14848-2017), with a 50% exceeding standard; The detection rate of petroleum hydrocarbons and nitrite nitrogen is 33.33%, meeting the Class IV water standard. In this monitoring, groundwater levels in W0, W1, and W3 all exceeded the standard. Among them, W0, W1, and W3 are manganese levels exceeding the standard. W0 is the control point, W1 is the southern area of Class A factory building, and W3 is the vicinity of the accident pool. The surrounding areas of the three groundwater wells are well hardened and there is no leakage. Moreover, W0 is located in the upstream area of groundwater, so it is speculated that the manganese level exceeding the standard may be caused by the high manganese content in the groundwater in the region; In addition, the total hardness index in W3 exceeds the standard by 0.078 times, and the other several points are relatively close to the Class IV water standard. Therefore, it is speculated that the exceeding of this index is also due to the high total hardness of the region. In summary, the internal soil and groundwater conditions of Jiangsu Aimou Optoelectronic Materials Co., Ltd. are generally good, but some indicators of groundwater have exceeded Class IV water conditions. Therefore, it is recommended not to use groundwater in this area as drinking water. At the same time, regular monitoring of soil and groundwater should be carried out in accordance with relevant soil and groundwater standards in the future to determine whether the groundwater exceeds the standard and has expanded. 10 Conclusion and Measures 10.1 Monitoring Conclusion In the soil and groundwater monitoring within the factory area of Jiangsu Aimou Optoelectronic Materials Co., Ltd., the characteristic pollutants such as petroleum hydrocarbons (C10~C40) and zinc in the soil, as well as the basic 45 items that must be tested in GB36600, did not exceed the soil pollution risk screening value for Class II land in GB36600-2018. Turbidity, pH, dissolved solids, total hardness, chloride, sulfate, permanganate index 23 indicators, including ammonia nitrogen, fluoride, nitrate, nitrite, iron, manganese, sodium, aluminum, zinc, copper, nickel, arsenic, iodide, dichloromethane, volatile phenols, and petroleum hydrocarbons, have been detected. Among them, the total hardness in W3 underground water wells exceeds the Class IV water quality standard of GB/T14848-2020, and the manganese in W0, W1, and W3 underground water all exceeds the Class IV water quality standard of the "Groundwater Quality Standard" (GB/T 14848-2017), All indicators in other groundwater have not exceeded the groundwater Class IV water standard, which may be due to the overall high level of these indicators in the regional groundwater. In addition, the detection values of characteristic pollutants such as petroleum hydrocarbons C10~C40 are also lower than the screening values for Class II land pollution risk control in Shanghai's construction land. Therefore, the pollution risk of surface soil and groundwater in the factory area of Jiangsu Aimou Optoelectronic Materials Co., Ltd. is currently within an acceptable range, but groundwater is not recommended for use as drinking water. 10.2 Main measures and reasons to be taken by enterprises in response to monitoring results (1) Establish and improve a system for identifying and rectifying potential soil pollution hazards In addition to conducting a comprehensive and systematic investigation of soil pollution hazards every 2-3 years in accordance with the "Guidelines for the Investigation of Soil Pollution Hazards in Key Regulatory Units (Trial)", enterprises should regularly conduct self inspections of key areas and facilities such as production areas, hazardous material warehouses, hazardous waste temporary storage rooms, underground rainwater and sewage pipelines, and pools within the factory area every year, and promptly rectify any discovered pollution hazards, truthfully record the investigation and rectification of hazards, Form archive files for future reference. At the same time, enterprises also need to conduct irregular inspections of hidden dangers based on their own production practices, promptly rectify the identified problems, and form documents for future reference. (2) Strengthen the management of production activities in production areas To reduce the risk of soil and groundwater pollution, enterprises should strengthen the management of anti-seepage measures for the ground inside and outside the factory buildings and entrances and exits in the production area. Cracks and damages on the ground should be repaired in a timely manner, and the anti-corrosion layer should be improved. At the same time, regular special inspections are conducted on the leakage of underground rainwater and sewage pipelines and underground pools within the factory area to prevent secondary pollution of soil and groundwater caused by pollutant leakage and migration. (3) Strengthen the construction of equipment and facilities to prevent leakage Enterprises shall design, construct, and install relevant anti-corrosion and leakage prevention facilities and leakage monitoring devices in accordance with the requirements of relevant national standards and regulations, in order to prevent the pollution of soil and groundwater by toxic and harmful substances, including production facilities, storage tanks, underground pipelines, and other facilities that pose a risk of soil and groundwater pollution. The design, construction, and installation of anti-corrosion and leakage prevention facilities and leakage monitoring devices should be archived in a timely manner. If conditions permit, facilities and equipment involving toxic and harmful substances should be designed above ground as much as possible and not directly grounded to reduce the risk of soil and groundwater pollution.

Jiangsu MO opto-electronic material Co., Ltd. (hereinafter referred to as Aimou) is located in the International Chemical Industry Park in Zhenjiang New Area No. 1 Qinglongshan Branch Road, adjacent to Xinchangyuan Chemical Industry to the south, Qinglongshan Road to the east, Zhenda Railway to the north, and Saifei New Materials to the west, The geographical coordinates are 119 ° 37'28.10647 "E and 32 ° 9'50.05985" N, covering an area of 41000m ² (61.5 acres), The planned land type is the second type of construction land. Emo belongs to the C3985 electronic specialized material manufacturing industry, specializing in production High purity metal organic compounds (MO source) with independent intellectual property rights and polyolefin/synthetic rubber industry specific alkanes Aluminum based catalysts are one of the large enterprises in China that can achieve large-scale production of alkyl aluminum and high-purity MO sources. enterprise Product classification: high-purity metal organic compounds (electronic chemicals) such as diethyl zinc and alkyl aluminum catalysts such as diethyl aluminum chloride Two major sectors, including diethyl zinc products with a purity of over 99.9999%. According to the Soil Pollution Prevention and Control Action Plan (Guo Fa (2016) No. 31), "Prevention and Control of Soil Pollution in Jiangsu Province Work Plan "(Su Zhengfa (2016) No. 169) and" Zhenjiang City Soil Pollution Prevention and Control Work Plan "(Zhen Zhengfa (2017] No. 29) Regarding the requirements of "resolutely controlling new soil pollution" and "preventing new pollution from construction land", Em As one of the key regulatory enterprises in Zhenjiang City, Ou (see "List of Key Soil Pollution Regulatory Units in Zhenjiang City") (2021] No. 4) Entrusted Jiangsu Langdi Environmental Technology Service Co., Ltd. (hereinafter referred to as "our company") to inspect the enterprise's factory Conduct investigation on potential soil and groundwater pollution hazards within the area, and prepare self monitoring of soil and groundwater based on the results of the investigation Plan. Our company follows the "Technical Guidelines for Self monitoring of Soil and Groundwater in Production Enterprises" (draft for soliciting opinions) and other countries Assign professional technical personnel to collect data, conduct personnel interviews, and conduct on-site investigations in accordance with relevant technical guidelines and standards Identify key locations and key facilities and equipment within the factory area that may pose potential soil and groundwater pollution hazards, and develop a scientific approach Reasonable soil and groundwater monitoring plan. After completing the initial draft, listen to the opinions of experts through letter review and The requirement has been further modified and improved, and the "Self monitoring of Soil and Groundwater by Jiangsu Aimou Optoelectronic Materials Co., Ltd." has been completed Test Plan (Draft for Approval). According to the self monitoring plan, our company's technical personnel conducted a soil monitoring site survey on September 24, 2021 The construction of on-site sampling and groundwater monitoring well was carried out on September 26th, and the on-site sampling of groundwater was carried out from September 27th to 10th Sample submission and laboratory testing analysis will be conducted on the 14th of the month. By analyzing the detection results of soil and groundwater samples, We have prepared the "2021 Soil and Groundwater Self Monitoring Report of Jiangsu Aimou Optoelectronic Materials Co., Ltd.". Page 1 Jiangsu Langdi Environmental Technology Service Co., Ltd 6 Conclusion and Suggestions In this monitoring of the soil and groundwater in the Emo factory area, zinc and petroleum hydrocarbons Cio~C40 were found in the surface soil of the factory area The basic 45 items that must be tested in GB36600-2018 and DB36/1282-2020 have not exceeded the requirements of GB36600-2018 and DB36/1282-2020 The soil pollution risk screening value for Class II land use. PH, chloride, sulfide, ammonia nitrogen, total phosphorus, aluminum Zinc, COD, total hardness, total dissolved solids, sulfate, cadmium, lead, chromium (hexavalent), mercury, arsenic, copper, nickel Cyanide, fluoride, and volatile organic compounds (24 items) do not exceed the Class IV water quality standard of GB/T 14848-2020, The detection value of petroleum hydrocarbon C π o~C40 is also lower than the second type of land screening for groundwater pollution risk control in Shanghai's construction land Value. Therefore, overall, the pollution risk of surface soil and groundwater in the Emo factory area is currently within an acceptable range Within, it can be ignored. However, in this monitoring, the zinc content at point S2 located on the south side of Class A factory building in the factory area is much higher than The background control point BJS, as well as the COD of the groundwater monitoring points (W1~W4) and background control points (BJW) in the factory area Both exceed the Class I limit and meet the Class IV water quality standard, especially W4 and BJW located in the first area of the Class A factory building in the production area The COD detection values of these two monitoring wells located in the production area of the factory area, which are also relatively upstream of groundwater flow, are significantly higher than Other points Wl and W3 located in the downstream area of the underground water in the factory area. Therefore, the following suggestions are proposed: 1. Establish and improve a system for identifying and rectifying potential soil pollution hazards In addition to the requirements of the "Guidelines for the Investigation of Soil Pollution Hazards in Key Regulatory Units (Trial)", it is carried out every 2-3 years A comprehensive and systematic investigation of potential soil pollution hazards should be carried out every year by enterprises, including regular inspections of production areas, hazardous material warehouses Conduct self-inspection on key areas and facilities such as hazardous waste temporary storage rooms, underground rainwater and sewage pipelines, and pools, and promptly rectify them Record the investigation and rectification of existing pollution hazards truthfully, and archive them for future reference. 2. Strengthen the management of production activities in production areas Regarding the high zinc content of soil point S2 in the production area of the factory and the COD content of groundwater wells W4 and BJW The situation is significantly higher than other points in the factory area. In order to reduce the risk of soil and groundwater pollution, enterprises should strengthen the factory within the production area Management of anti-seepage measures for both indoor and outdoor floors and entrances/exits, timely repair of cracks and damages on the floor, and improvement of the anti-corrosion layer. At the same time, regular special inspections are conducted on the leakage of underground rainwater and sewage pipelines and underground pools within the factory area to prevent pollutants Leakage migration causes secondary pollution of soil and groundwater. 3. Strengthen the construction of equipment and facilities to prevent leakage The presence of soil in production facilities, storage tanks, underground pipelines, etc. involving toxic and harmful substances during the new, renovation, and expansion of enterprises Facilities that pose a risk of groundwater pollution should be designed, constructed, and installed in accordance with relevant national standards and regulations Page 5 Jiangsu Langdi Environmental Technology Service Co., Ltd

Page 1 Jiangsu Langdi Environmental Technology Service Co., Ltd Project Background Jiangsu MO opto-electronic material Co., Ltd. (hereinafter referred to as Aimou) is located in the International Chemical Industry Park in Zhenjiang New Area No. 1 Qinglongshan Branch Road, adjacent to Xinchangyuan Chemical Industry to the south, Qinglongshan Road to the east, Zhenda Railway to the north, and Saifei New Materials to the west, The geographical coordinates are 119 ° 37 ′ 28.10647 ″ E and 32 ° 9 ′ 50.05985 ″ N, covering an area of 41000m2 (61.5 acres). IMOO belongs to the C3985 electronic specialized material manufacturing industry, specializing in the production of high-purity metal organic materials with independent intellectual property rights Compounds (MO sources) and alkylaluminum catalysts specifically designed for the polyolefin/synthetic rubber industry are capable of achieving alkylation in China One of the large enterprises engaged in large-scale production of aluminum and high-purity MO sources. Enterprise products are classified as high-purity metal organic compounds (electronic Chemicals such as diethyl zinc and alkyl aluminum catalysts such as diethyl aluminum chloride, among which the diethyl zinc product is pure The degree reaches over 99.9999%. Emo currently has 30 active employees who work 300 days a year, with a total of 17 frontline employees Implement a continuous working system of three shifts and two shifts for personnel; The technical management and logistics service positions are subject to a regular day shift system. According to the "Action Plan for Soil Pollution Prevention and Control" (Guo Fa [2016] No. 31) and the "Soil Pollution Prevention and Control Work in Jiangsu Province Plan "(Su Zheng Fa [2016] No. 169) and" Zhenjiang City Soil Pollution Prevention and Control Work Plan "(Zhen Zheng Fa [2017] Regarding the requirements of "resolutely controlling new soil pollution" and "preventing new pollution from construction land", Aimou, as a town One of the key regulatory enterprises in Jiang City (refer to the "List of Key Soil Pollution Regulatory Units in Zhenjiang City" (Zhenjiang Environmental Protection Office [2021] 4) Entrust Jiangsu Langdi Environmental Technology Service Co., Ltd. to carry out the investigation of soil and groundwater pollution hazards in the enterprise's factory area Check and develop a self monitoring plan for soil and groundwater based on the results of hazard investigation. Jiangsu Langdi Environmental Technology Service Co., Ltd The company follows relevant national technologies such as the "Technical Guidelines for Self monitoring of Soil and Groundwater in Production Enterprises" (draft for soliciting opinions) Assign professional technical personnel to collect data, conduct personnel interviews, and conduct on-site investigations in accordance with the requirements of the guidelines and standards Identify key locations and facilities that can pose potential soil and groundwater pollution hazards, and develop scientific and reasonable soil Soil and groundwater monitoring plan. Self monitoring purpose Law of the People's Republic of China on the Prevention and Control of Soil Pollution, and Action Plan for Soil Pollution Prevention and Control (Guo Fa [2016] 31) The introduction of laws, regulations, and documents such as No. has clarified the main body of key regulatory enterprises for soil and groundwater environmental protection Responsibility, promote enterprises to strengthen internal management, incorporate soil and groundwater pollution prevention and control into the environmental risk prevention and control system, and strictly Construct and operate pollution control facilities in accordance with laws and regulations to ensure stable and standard discharge of key pollutants. Developing soil for enterprise land use Self monitoring of soil and groundwater is the primary link in controlling soil and groundwater pollution risks, which is conducive to timely detection of potential pollution Factors, take measures to prevent new pollution, achieve source prevention of soil and groundwater pollution in enterprises in production, and ensure soil protection. Page 2: Jiangsu Langdi Environmental Technology Service Co., Ltd And the quality and safety of groundwater environment. Self monitoring principle (1) Targeted principle Identify key locations for potential soil and groundwater pollution hazards based on the production situation and pollution discharge processes within the enterprise's factory area And key facilities and equipment provide a basis for self monitoring and environmental management of soil and groundwater within the factory area. (2) Normative principle The design and preparation process of the self monitoring plan strictly follows the requirements of relevant national standards and guidelines, regulates soil and The layout of groundwater monitoring points, on-site sampling, and sample collection and analysis process ensure the scientificity and monitoring of the monitoring process The reliability of the results. (3) Principle of operability Taking into account the actual situation within the factory area of the production enterprise, combined with the current technological development and professional technical level, the soil and The layout of groundwater monitoring points, sample collection, and testing analysis process are practical and feasible. Self monitoring basis laws and regulations Environmental Protection Law of the People's Republic of China (implemented from January 1, 2015); The Water Pollution Prevention and Control Law of the People's Republic of China (implemented from January 1, 2018); Law of the People's Republic of China on the Prevention and Control of Soil Pollution (implemented from January 1, 2019); Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste (implemented from September 1, 2020); Regulations on the Safety Management of Hazardous Chemicals (State Council Order No. 645); Action Plan for Soil Pollution Prevention and Control (Guo Fa [2016] No. 31); Measures for Soil Environmental Management of Industrial and Mining Land (Trial) (Order of the Ministry of Environmental Protection [2018] No. 3); Regulations on Ecological Environment Monitoring in Jiangsu Province (implemented from May 1, 2020); Technical standards and guidelines General Guidelines for Self Monitoring Technology of Pollutant Discharge Units (HJ 819-2017); Technical Guidelines for Self Monitoring of Soil and Groundwater in Production Enterprises (Draft for Soliciting Opinions); Technical Guidelines for Soil Pollution Investigation on Construction Land (HJ 25.1-2019); Technical Guidelines for Soil Pollution Risk Control and Remediation Monitoring of Construction Land (HJ 25.2-2019); Page 3 Jiangsu Langdi Environmental Technology Service Co., Ltd Technical Specification for Soil Environmental Monitoring (HJ/T 166-2004); Technical Specification for Groundwater Environmental Monitoring (HJ/T 164-2020); Technical Guidelines for Soil Environmental Investigation and Assessment of Construction Land (Announcement No. 72 of 2017); Technical Guidelines for Sampling Volatile Organic Compounds in Land Soil and Groundwater (HJ 1019-2019); Technical Regulations for the Preservation and Management of Water Quality Samples (HJ 493-2009); Soil Environmental Quality Standards - Soil Pollution Risk Control Standards for Construction Land (Trial) (GB36600-2018); Quality Standards for Groundwater (GB/T 14848-2017); Comprehensive Emission Standards for Air Pollutants (DB 32/4041-2021); Discharge Standards for Water Pollutants in the Chemical Industry (DB32/939-2020); Technical Guidelines for Environmental Impact Assessment - Groundwater Environment (HJ 610-2016); Job Description and Technical Route Job Description Jiangsu MO opto-electronic material Co., Ltd. formulates and implements soil in accordance with relevant laws, regulations, and technical specifications And the groundwater self monitoring plan, organize regular monitoring, and timely discover the impact of the operation process of various key facilities in the factory area on soil Does the soil and groundwater environment cause pollution. The main job responsibilities include: (1) Identification of key facilities and areas Based on data collection, personnel interviews, and on-site investigations, the situation of various areas and facilities in the factory area is analyzed, combined with production Analyze the production, discharge, and migration pathways of pollutants during the process, and identify potential soil or groundwater pollution hazards within the factory area Key facilities and key areas. (2) Determination of monitoring content Design a soil and groundwater self monitoring plan for the identified key facilities and areas, and determine the soil Layout of soil and groundwater monitoring points, monitoring items and frequency, construction and maintenance of monitoring wells, and changes in monitoring plans Content. (3) Sample collection, storage, circulation, and analysis testing The collection, preservation, and circulation of soil and groundwater samples shall comply with relevant national standards and technical guidelines HJ/T 164 According to the requirements of HJ/T 166 and HJ 1019; The testing and analysis of samples are entrusted to China with metrological certification (CMA) qualified testing institutions shall conduct testing and analysis, with priority given to using national or industry standard analysis methods. Page 4 Jiangsu Langdi Environmental Technology Service Co., Ltd (4) Analysis of sample testing results Referring to the environmental quality standards for soil and groundwater (i.e. GB 36600-2018 and GB/T 14848-2017), the sample Analyze the detection results to determine whether the pollutants of concern at each monitoring point in the factory area exceed the corresponding control limits. about Key locations or facilities with confirmed signs of pollution should be immediately investigated for potential hazards to identify the cause of pollution, Cut off pollution sources, prevent pollution diffusion, and appropriately increase monitoring points to increase monitoring frequency. (5) Quality Assurance and Quality Control According to the work needs of self monitoring, establish monitoring institutions or departments, equip monitoring personnel, and establish self monitoring quality The quantity system ensures and controls the quality of various links such as the development of monitoring plans, sample collection, preservation, circulation, and analysis and testing. (6) Preparation of monitoring reports and archiving of data The relevant content of soil and groundwater self monitoring within the factory area shall be included in the annual report of enterprise self monitoring, and the data shall be properly collected File and submit monitoring data to the ecological environment regulatory department in accordance with the law. technology roadmap The technical route for self monitoring of soil and groundwater in industrial enterprises is shown in Figure 1-1. Page 5 Jiangsu Langdi Environmental Technology Service Co., Ltd Figure 1-1 Roadmap of Soil and Groundwater Self Monitoring Technology for Enterprises in Production Page 6 Jiangsu Langdi Environmental Technology Service Co., Ltd Enterprise Overview Basic information Jiangsu MO opto-electronic material Co., Ltd.(hereinafter referred to as Aimou) was registered and established in August 2010 No. 1 Qinglongshan Branch Road, International Chemical Industry Park, Zhenjiang New Area, with geographic coordinates of 119 ° 37 ′ 28.10647 ″ E and north latitude 32 ° 9 ′ 50.05985 ″, covering a total area of 41000m2 (61.5 acres). Made of Emo C3985 electronic special material Manufacturing industry, specializing in the production of high-purity metal organic compounds (MO sources) and polyolefins/polymers with independent intellectual property rights The dedicated alkyl aluminum catalyst for the rubber industry is a large scale catalyst that can achieve large-scale production of alkyl aluminum and high-purity MO sources in China One of the top tier enterprises. Enterprise products are classified into high-purity metal organic compounds (electronic chemicals) such as diethyl zinc and alkyl aluminum catalysis Agents such as diethyl aluminum chloride and other two major plates, with a purity of over 99.9999% for diethyl zinc products. Currently, the product It has been widely used in polyolefins (Sinopec, PetroChina, coal chemical), synthetic rubber, microelectronics, LED/OLED Display and new energy battery industries. The industrial park where EMO is located is a gathering area for chemical enterprises, with only vacant land on the east side of Qinglongshan Road within its four boundaries, The rest are chemical enterprises, with Xinchangyuan Chemical on the south side, Saifei New Materials on the west side, Zhenda Railway on the north side, and Puyuan on the west side Chemical, Kepu Chemical, and Zhengdan Chemical are facing each other across the road. The geographical location and satellite images of the Emo factory area are shown in Figures 2-1 and 2-2, The coordinates of the inflection points of the factory plot are shown in Appendix 11-1. Figure 2-1 Geographical Location of Emo Figure 2-2 Image of Emo Satellite Identification results According to the identified key facilities and areas, there are no liquid storage facilities or sewage treatment facilities in the Emo factory area Shi. The production area (R2) is the sewage discharge area for facilities and equipment such as reaction kettles during the production process in the factory area, and it also contains raw and auxiliary materials Temporary storage tanks (above ground) and waste gas disposal for finished products; Dangerous goods warehouse (R3) and Class D warehouse (R4) are hazardous materials within the factory area Hazardous chemicals (including hazardous waste) storage and transmission areas, therefore production areas (R2), hazardous material warehouses (R3), and Class D The warehouse (R4) is a primary key monitoring area, while the rest are secondary key monitoring areas. Key points within the Emo factory area plot The monitoring area is shown in the red wireframe in Figure 3-1, and the specific division is shown in Table 3-2. heavy Frequency of groundwater and soil monitoring According to the guidelines, the minimum monitoring frequency for enterprises to self monitor soil and groundwater is 1 time per year. When it is discovered that If there is pollution in the soil or groundwater, adjust the sampling point layout of the monitoring plan according to the actual situation, and increase the amount of soil and groundwater Annual monitoring frequency of the site. The soil monitoring factors within the factory plot include 45 basic items and characteristic pollutants in GB 36600-2018 Petroleum hydrocarbons C10~C40, zinc, specific monitoring factors are shown in Table 4-5. Table 4-5 List of monitoring factors for soil sites under self-monitoring by Emo -- Based on the homology of soil and groundwater pollutants within the factory plot, as well as the organic pollutants produced by solid (hazardous) waste and exhaust gas emissions Mainly volatile organic compounds. Therefore, ① Groundwater monitoring factors include 45 basic items in GB 36600-2018 7 heavy metals and 27 volatile organic compounds, excluding semi volatile organic compounds and containing characteristic pollutants Monitoring factors for petroleum hydrocarbons C10~C40 and zinc; ② According to the conventional indicators of GB/T 14848-2017, combined with the production process in the factory area The pollutants of concern to wastewater (domestic sewage) include aluminum, COD, ammonia nitrogen, total phosphorus, chloride, sulfide, and Sulfate, as well as potential characteristics of chemical manufacturing projects in Appendix F of HJ 164-2020, with added toxicological indicators of fluoride Chemicals and cyanide; ③ This includes the general physical and chemical indicators of groundwater, including pH, total hardness, and total dissolved solids. Specific monitoring factors Please refer to Tables 4-6 for details. Jiangsu Aimou Optoelectronic Materials Co., Ltd. Soil and Groundwater Self Monitoring Plan Page 10 Jiangsu Langdi Environmental Technology Service Co., Ltd Table 4-6 List of monitoring factors for groundwater points under self-monitoring by EMO safety protection Safety protection mainly includes the following aspects: (1) Before starting on-site sampling, communicate with staff familiar with the company's situation again to investigate the underground related issues Further confirmation of pipeline and other conditions. During on-site sampling, invite staff familiar with the company's situation to provide on-site guidance to avoid Lowering the pipeline affects construction safety. (2) Pay attention to electricity safety during on-site construction and use qualified and safe construction machinery. Temporary construction electricity mainly relies on Diesel generator power supply, while utilizing existing power supply lines to assist power supply. Before use, check the generator and existing power supply lines The safety of the device must not be arbitrarily pulled or connected. Jiangsu Aimou Optoelectronic Materials Co., Ltd. Soil and Groundwater Self Monitoring Plan Page 11 Jiangsu Langdi Environmental Technology Service Co., Ltd (3) Construction machinery and equipment safety. The machinery and equipment used during the construction process shall be selected based on a construction qualification form The protection measures should be complete and managed by professional personnel. Before use, safety checks should be carried out to ensure that there is no "sick" work and that it meets the requirements of safety and civilization. (4) Strengthen fire protection measures during construction. Construction in fire resistant areas should be carried out with caution, and temporary construction sheds should comply with fire safety requirements, Flammable materials are not allowed to be used. Flammable and explosive materials in construction materials must be stored separately and must comply with fire prevention regulations. Construction processes are prohibited Smoking is prohibited, and it is prohibited to come into contact with leftover materials in the venue. Strictly equip fire extinguishing equipment during the construction process. (5) Strengthen personnel management at the construction site to prevent unrelated personnel from entering. Adopting supervision, inspection, and institutional constraints A combination of measures to comprehensively ensure construction safety. Strictly implement sampling construction requirements. Appoint on-site safety supervision personnel, Full time inspection of construction standards. (6) Strengthen publicity and education to raise awareness. Promote safety regulations and knowledge to all construction personnel entering the site, Educate on the correct wearing of personal protective equipment, emergency response to accidents, and inform about the risks present on site, emphasizing the importance of on-site use The particularity of work.