Second information disclosure of environmental impact assessment for the expansion project of non-ferrous metal alloy manufacturing

I. Overview of the construction project

Construction project name: Expansion project of non-ferrous metal alloy manufacturing

Construction unit: Dongguan Liangshu New Material Co., Ltd

Construction nature: expansion

Construction site: Inside the existing workshop, No. 7, Zifu Road, Tianjin Ziya Circular Economy Industrial Zone.  

Construction overview: This project involves adding two alloy wire rod production lines to the existing roughcast workshop 1. Each production line is equipped with a power frequency induction furnace and several standby furnaces, along with a batch of new production equipment. The annual production capacity is 5,000 tons of non-ferrous metal alloy welding wires and wires.

II. Potential Environmental Impacts of the Project and Preventive Measures

1. Construction period

All production in this project utilizes the existing production workshop, and other auxiliary and supporting facilities, including office buildings, rely on the company's existing facilities. Therefore, the construction process of this project is only the installation and commissioning of simple production equipment, which is carried out in the production workshop. The construction process is simple and the construction period is short, and the construction period will not have a significant impact on the surrounding environment.

2. Operation period

(1) Atmospheric environment

1) Exhaust gas from melting, heat preservation, and strip drawing processes: The exhaust gas generated during the melting, heat preservation, and strip drawing processes is collected by a gas collection hood and then enters a cyclone bag filter for treatment before being discharged through a 15m high exhaust stack, with an emission concentration of 0.0165mg/m3. The emission concentration of particulate matter emitted in an organized manner can meet the corresponding limit (20 mg/m3) specified in the "Emission Standards for Air Pollutants from Industrial Kilns and Furnaces" (DB12/556-2015), thus having a minor impact on the surrounding environment.

The unorganized emission of particulate matter from the melting, heat preservation, and strip drawing processes amounts to 0.0512 t/a, which is discharged into the external environment through the doors and windows of the workshop in an unorganized manner. According to the prediction results, the unorganized particulate matter emission concentration from the melting, heat preservation, and strip drawing processes of the project meets the requirements of the limits specified in Table 2 of the "Integrated Emission Standard of Air Pollutants" (GB16296-1996), and has a minor impact on the surrounding environment.

2) Exhaust gas from the skinning process: The dust from the skinning process is collected by a gas collection hood and enters a bag filter for treatment before being discharged through a 15m high exhaust stack. The organized emission rate is 0.00056kg/h, and the emission concentration is 0.037 mg/m3. Both the emission concentration and emission rate of the particulate matter from the organized emission can meet the requirements of the limits specified in Table 2 of the "Integrated Emission Standard of Air Pollutants" (GB16296-1996), with minimal impact on the surrounding environment.

The unorganized emission of particulate matter from the skinning process is 0.1 t/a, which is discharged into the external environment through the doors and windows of the workshop in an unorganized manner. According to the prediction results, the unorganized particulate matter emission concentration from the skinning process of the project meets the requirements of the limits specified in Table 2 of the "Integrated Emission Standard of Air Pollutants" (GB16296-1996), and has a minor impact on the surrounding environment.

(2) Surface water environment

The wastewater in this project is primarily domestic sewage, with a daily discharge volume of 2.76 cubic meters and an annual discharge volume of 828 cubic meters. After being treated in the existing septic tanks within the factory area, the domestic sewage from the project is channeled through the sewage pipe network of the Ziya Circular Economy Industrial Zone and then into the Ziya Wastewater Treatment Plant for further treatment.

The project's wire drawing, drawing, and finished wire drawing processes all require the use of indirect circulating cooling water, while annealing uses direct circulating cooling water. The circulating cooling water is reused and not discharged outside. This project has a minor impact on the surface water environment.

(3) Groundwater environment

Based on the characteristics of the construction and operation periods, identify the impacts on the groundwater environment under "normal conditions" and "abnormal conditions", and determine the prediction scenarios and prediction factors.

1) Construction period

During the civil construction and installation of equipment and facilities in the project, after taking environmental protection measures for the collection, removal, and discharge of construction waste, waste soil, and construction wastewater in accordance with national and local requirements, the impact on the groundwater environment is minimal.  

2) Operation period

① Normal condition

Waste engine oil and other hazardous wastes are temporarily stored in the hazardous waste room, inspected daily, and regularly transferred. None of these practices will pollute groundwater.  

② Abnormal condition

Based on engineering analysis, the plant area is equipped with a hazardous waste room. During the handling and storage of temporarily stored waste engine oil, there is a possibility of leakage and damage to the floor of the hazardous waste room, which could lead to groundwater contamination by petroleum pollutants.

This prediction examines the relationship between pollutant concentration and downstream distance (C-x) at 100 days, 1000 days, 3650 days (10 years), and 7300 days (20 years) after an oil leakage from the hazardous waste room. According to the prediction, the petroleum-based substances (oil) within the hazardous waste room will not exceed Class III standards and will remain below the detection limit at all these time points.

(4) Acoustic environment

The noise-generating equipment used in this project mainly includes shearing machines, water pumps, and fans, with noise levels ranging from 75 to 90dB(A). The predicted noise values at the factory boundaries during daytime meet the "Class 3" standard requirements specified in the "Emission Standard for Industrial Enterprises Noise at Boundary" (GB12348-2008). Therefore, the equipment noise during the project's operational phase will not have a significant impact on the acoustic environment of surrounding sensitive points.  

III. Conclusion of Environmental Impact Assessment

The construction of this project conforms to the current national and local industrial policy requirements; the production process and facilities comply with the national technical specifications; upon completion, the project will yield significant environmental and social benefits.

After analyzing the impacts of the proposed project on wastewater, waste gas, noise, and solid waste, it is found that the construction of this project has an acceptable impact on the environment, provided that various pollution prevention measures are effectively implemented. Therefore, the project is feasible in terms of environmental protection.    

IV. Scope and Main Topics for Public Consultation

This public notice is primarily targeted at units and individuals directly or indirectly affected by the construction of this project, as well as other members of the public who have opinions and suggestions regarding the project's construction. It mainly seeks public input on potential environmental issues that may arise during the project's operation, and aims to understand the public's suggestions and opinions on the environmental protection efforts of this project.    

V. Contact Information for Public Consultation During the publicity period, the public can contact the construction unit or its entrusted evaluation unit by mail, fax, or telephone to express their opinions and views on the construction and environmental impact assessment of the project. The contact information is as follows:

1. Name and contact information of the construction unit

Construction unit: Dongguan Liangshu New Material Co., Ltd. Address:

Contact Person:

Contact phone number:

email

2. Name and contact information of the environmental impact assessment unit

Environmental impact assessment unit:

Xizang Shenzhou Ruilin Environmental Protection Technology Co., Ltd

Certificate No.: GHPZ No. 3507

Address: Room C1002, 10th Floor, Block C, Building B-6, North Territory, Zhongguancun Dongsheng Science and Technology Park, No. 66 Xixiaokou Road, Haidian District, Beijing

Contact: Mr. Li

Contact number: 010-62956605

Email: 1150966705@qq.com

VI. Starting and ending time for public comments: The public is requested to contact the construction unit or environmental assessment unit within ten working days from the date of this announcement to provide feedback and suggestions on the environmental protection aspects of this project.

Note: If necessary, you can request a simplified version of the environmental impact report for this project from the environmental assessment unit.    

Announcement issued by: Dongguan Liangshu New Material Co., Ltd. August 10, 2018