Issues regarding the design of the factory’s main exhaust outlet

There should be standards for this, as when installing a flow meter – usually an ultrasonic flow meter – the discharge outlet needs to have fixed specifications； In Fujian, it is six meters long, 60 centimeters wide, and 60 centimeters deep ； Cover both the inside and outside with tiles for an attractive appearance ； Shields also need to be installed at both ends: the one at the front prevents bubbles generated by water falling from affecting the operation of the flow meter, while the one at the back ensures a certain water level so as not to disrupt the proper functioning of the online monitoring instruments.

View relevant **standards; there are corresponding production regulations**

Technical Specifications for the Standardized Rectification of Wastewater Outlets Article 1 These specifications are formulated to standardize the management of discharge outlets, in accordance with environmental standards and the relevant regulations of the **State Environmental Protection Administration. Article 2 These specifications apply to the standardized rectification of emission outlets at existing polluting units, as well as the standardized construction of emission outlets for new and expanded projects. Article 3: The standardized rectification of emission outlets shall follow the principles of facilitating sample collection, measurement and monitoring, as well as routine on-site supervision and inspection. Article 4: Standardized emission outlets of key pollution sources shall be equipped with measuring devices, recorders for pollution control facilities, and monitoring devices, and shall be connected to the computer monitoring network of the municipal environmental protection bureau. If it is not installed yet, a space for installation should be reserved during the construction or renovation of the discharge outlet. Simple metering and recording devices can be installed at the standardized discharge outlets of industrial pollution sources that are subject to emission regulations. Article 5: Rectification and standardization of wastewater discharge outlets 1. The main discharge outlet of the polluting entity, as well as the discharge outlets of workshops that emit Class 1 pollutants, shall be equipped with properly designed flow measurement sections and sampling points in accordance with the \"Technical Specifications for Pollutant Source Monitoring\", to facilitate the measurement of flow rate and velocity ； 2. It is prohibited to construct new wastewater discharge outlets within drinking water source protection areas. Existing discharge outlets should be subject to total pollutant control in accordance with the functional requirements of the water bodies, to ensure that the receiving waters meet the water quality standards for their designated uses. Article 6: Rectification and standardization of exhaust gas emission outlets 1. For those that emit exhaust gases in an organized manner, the number, height, and leakage conditions of their exhaust stacks shall be rectified ； 2. The setting of the sampling ports shall meet relevant requirements and facilitate sampling and monitoring. If the location of the sampling port does not meet the regulatory requirements, its location shall be determined by the local environmental monitoring authority ； 3. In cases of uncontrolled emission of toxic and harmful gases, a ventilation system should be installed to collect and treat such gases, and sampling points should be marked ； Article 7: Rectification and standardization of sites for the storage and stacking of solid waste 1. Specialized sites for the storage and stacking of general solid waste should be designated. For storage and stacking areas where secondary dust generation is likely, preventive measures such as water spraying should be taken ； 2. Hazardous waste such as toxic and harmful solid wastes must be stored in dedicated disposal areas, with preventive measures in place to prevent dispersion, loss, and leakage ； 3. Temporary solid waste storage and dumping sites should also be appropriately rectified and standardized according to the circumstances. Article 8: Rectification and regulation of fixed noise emission sources. Where the noise level at the boundary of a factory exceeds the environmental noise standards for the corresponding environmental function zone, measures must be taken to address those noise sources so that they meet the requirements set by those standards. Article 9 Requirements for signage at emission outlets 1. When pollution-discharging entities carry out standardized improvements and construct emission outlets (sources) as well as sites for the storage and disposal of solid waste, they must install signage at these outlets in compliance with the provisions of the ** standards “Graphic Symbols for Environmental Protection” (GB15562.1—1995) and (GB15562.2—1995) ； 2. Signboards should be placed in prominent locations near pollutant emission sources and solid waste storage (disposal) sites, or at sampling and monitoring points, and should be able to remain in place for a long time. Depending on the circumstances, vertical or horizontal fixed signs can be chosen; for signs installed on the ground, the upper edge of such signs should be 2 meters above the ground level ； 3. At general pollutant discharge points (sources) or sites for the storage and disposal of solid waste, warning environmental protection graphic signs should be installed ； 4. At emission outlets (sources) that release highly toxic substances, carcinogens, and other materials that pose serious risks to human health, as well as at sites where hazardous waste is stored or disposed of, warning environmental protection signage must be installed ； 5. The fields that need to be filled in on the auxiliary signs of the signboards shall be filled out in a unified manner by the municipal environmental protection bureau; the handwriting must be neat, and the color of the text should be in harmony with the overall color of the signboard. Article 10: Both the municipal environmental protection bureau and the polluting entities are required to use the \"Registration Certificate for Standardized Emission Outlet Marks of the People’s Republic of China\", which is printed uniformly by the **General Administration of Environmental Protection. They must fill in the relevant information carefully as required, in accordance with Document Su Huan Kong (1997) No. 122. The registration certificate and the emission outlet sign shall be used in conjunction. The number on the sign plate in the register list and the number on the registration card for that sign plate should match the number on the auxiliary mark of the sign plate. The numbering format is specified as follows: Wastewater – WS—XXXXXXX; Noise – ZS—XXXXXXX; Exhaust gases – FQ—XXXXXXX; Solid waste – GF—XXXXXXX. The first two letters of the code represent the category of waste being discharged, the first to fourth digits denote the sequential number of the entity discharging the waste (which corresponds to the ninth to twelfth digits of the waste discharge registration number), while the fifth to sixth digits indicate the sequential number of the discharge outlet. The numbering sequence of multiple discharge outlets: for wastewater discharge outlets, they are arranged in a clockwise direction, starting from the main entrance of the discharging entity ； The exhaust stacks (chimneys) are arranged in sequence according to the process flow, from the main production units to the auxiliary units ； The arrangement method for the monitoring stations at locations where fixed noise pollution sources disturb residents is the same as that for wastewater discharge outlets ； Solid waste storage (disposal) sites are arranged in the order of their usage duration and clockwise from the entrance. Article 11: The Municipal Environmental Protection Bureau shall establish management files for emission outlets based on the information contained in the registration certificates, such as the name of the polluting entity, and the nature and number of the emission outlets. Geographical location of the emission outlet, types, quantities, and concentrations of the main pollutants emitted, destination of the emissions, status of signage, operation status of the facilities, and suggestions for improvement, etc.

Appendix 2: Technical Requirements for the Standardization of Wastewater Discharge Outlets 1. Scope: Applicable to the standardization of wastewater discharge outlets of existing polluting units in this province, as well as to the standardized construction of wastewater discharge outlets for new, expanded, and renovated projects. 2. Referenced Standards The provisions contained in the following standards and specifications, when referenced in these requirements, constitute the provisions of these requirements and have the same effect as them. GB15562.1—1995 Environmental Protection Graphic Symbols – Emission Outlets (Sources); GB8978—1996 Comprehensive Wastewater Discharge Standards; HJ/T96-2003 Technical Requirements for Automatic pH Water Quality Analyzers; HJ/T15-1996 Ultrasonic Open Channel Wastewater Flow Meters; JJG711-90 Flow Meters for Open Channel Weirs; CJ/T3008.1–5—93 Standards for Measuring Urban Drainage Flow Using Weirs; HJ/T191-2005 Technical Requirements for Automatic Online UV Absorption Water Quality Monitors; HBC6-2001 Technical Requirements for the Certification of Environmental Protection Products; Automatic Online Monitors for Chemical Oxygen Demand (CODcr) in Water Quality. When these standards and specifications are revised, their latest versions should be used. 3. Definitions: The standardization of wastewater discharge outlets refers to the systematic management of the types, quantities, concentrations, and methods of pollutant discharge from such outlets, with the aim of facilitating sample collection, automatic monitoring, and routine inspection and supervision. 4. Principles for standardizing wastewater discharge outlets 4.1 Discharge entities that meet one of the following conditions should be given priority in carrying out standardized improvements or constructions for their discharge outlets, and flow meters should be installed to measure flow rates; at the same time, the groundwork for online monitoring must be laid: 4.1.1 Key pollution sources identified by the State Environmental Protection Administration 4.1.2 Key pollution sources identified by the provincial environmental protection administrations 4.1.3 Urban (town) sewage treatment plants, as well as sewage treatment plants in industrial parks (including industrial clusters) 4.2 Discharge outlets for pollutants that are subject to total emission control limits (such as chemical oxygen demand and ammonia nitrogen) should first undergo standardized improvements or constructions. 4.3 In cases where wastewater contains pollutants of Category 1, standard sampling points should be established at the outlets of workshops or at the wastewater treatment facilities within those workshops. 5. Steps and contents for the standardization of wastewater discharge outlets 5.1 Investigation of the current status of pollution source discharge outlets: Discharge entities conduct investigations of each of their wastewater discharge outlets to determine the geographical location of these outlets (including latitude and longitude), as well as the types, concentrations, quantities of the main pollutants discharged, the methods of discharge, the destinations of the discharged waste, and the impact on the surrounding environment. 5.2 Engineering design and construction for the standardization of discharge outlets: Based on the status survey, an engineering design plan for the discharge outlets is prepared, engineering drawings are drawn up, and the estimated costs, construction period, and completion date for the improvement of each discharge outlet are determined. The design plan shall meet the requirements of Article 6 of these requirements. 5.3 Standardization of the filling out of emission outlet registration certificates and the installation of environmental protection signage: Emission-emitting units shall install signage at the designated locations at each emission outlet in accordance with the requirements of standard GB15562.1-1995. The district or county environmental protection bureaus are responsible for filling out and issuing the \"Standardized Emission Outlet Registration Certificate\", thereby completing the process of marking the emission outlets. Each registration certificate shall be accompanied by a photo showing the location of the installation sign, and submitted to the municipal environmental protection bureau for record-keeping. 5.4 Establishment of standardized records for emission outlets: To meet the needs of future supervision and management of pollution sources, it is necessary to create records for the supervision and management of each emission outlet after standards are established. These records should include information such as the name of the polluting entity, the nature and designation of the emission outlet, its geographical location, the types, quantities, concentrations of the main pollutants emitted, as well as their destination; details on the establishment of relevant standards; records of facility operation; and findings from regular on-site inspections. 5.5 Acceptance of the standardization of emission outlets: Before putting the equipment for standardizing emission outlets into operation, the polluting entity shall apply to the local environmental protection department for acceptance and submit relevant documents. Upon receiving an application for inspection, the local environmental protection authorities organize relevant departments to conduct the inspection for those entities that meet the requirements. For new, renovated, or expanded projects that undergo standardized treatment of their emission outlets, the acceptance process is carried out simultaneously with the environmental protection acceptance upon completion of the construction project. 6. Methods and technical requirements for the standardization of wastewater discharge outlets 6.1 Construction of the instrument room (1) The typical area of an instrument room is around 9 m2, with a height of 3 m; the construction materials used are brick-concrete or colored steel. (2) The instrument room should be built near the sampling port, with the distance generally not exceeding 5 m. (3) The supply voltage is 220V, 50HZ. The power supply must be stable to meet the operational requirements of the equipment. Provide a regulated power supply of at least 2KW. (4) The operating temperature of the equipment is generally between 15 and 35°C. The room should be equipped with an air conditioner with a power output of around 1000W. For winter heating, air conditioners or electric heaters can be used to maintain the working temperature. (5) To ensure good wireless communication signals for the equipment, the instruments should be kept away from sources of electromagnetic radiation and tall metal structures. (6) Attention should be paid to lightning protection between instruments. The electrical system should be grounded for protection. (7) Nameplates and warning signs should be hung outside the instrument room, and unauthorized personnel are prohibited from entering. 6.2 For entities whose production and operation sites are concentrated in one location, in principle, only one outlet for wastewater and one outlet for treated water are permitted ； For entities whose production and operation sites are not in the same location, in principle only one emission outlet is allowed per site. In cases where, due to special reasons, individual units need to install more emission outlets than permitted, they must submit an application for approval to the local environmental protection authorities. If a pollution-discharging unit has multiple discharge outlets, it is necessary to carry out consolidation and improvement of the pipeline network by combining separate treatment of clean and polluted water streams and rational adjustment of wastewater flow. 6.3 Monitoring of Class I pollutants shall be carried out in accordance with the provisions of the \"Integrated Wastewater Discharge Standards\" (GB8978—1996) and the \"Technical Specifications for the Design of Water Quality Sampling Plans\" (GB12997—1996); sampling points shall be established at the outlets of workshops or wastewater treatment facilities in those workshops ； For the monitoring of category II pollutants, sampling points are set at the total discharge outlets of the polluting entities. In principle, the location of the main discharge outlet is set at the factory boundary. For those that do not meet the requirements, approval from the district or county environmental protection department is necessary. 6.4 The sampling points shall meet the sampling requirements. When using hidden pipes or channels for waste discharge, a shaft that meets the sampling requirements must be installed, or a section of open channel must be constructed. If the sewage surface is more than 1 meter below the ground level, sampling steps or ladders should be provided. Sampling valves should be installed on pressure pipeline discharge outlets. 6.5 Entities that meet the requirements of paragraphs 4.1 and 4.2 of these regulations must construct a special channel (pipe) (flow measurement section) upstream of the main discharge outlet of the entity, at a location where all wastewater streams can be accessed, and this section shall be designed in accordance with the terrain, drainage methods, and volume of wastewater flow, in order to meet the requirements for measuring flow rates: A. Principles for selecting flow measurement tanks a. When the wastewater flow rate is greater than 50 cubic meters per hour, and the terrain is suitable, it is appropriate to use a Bézier tank installed within an open channel. b. When the discharge rate is not more than 50 cubic meters per hour and the terrain is relatively narrow, triangular or rectangular weirs fitted inside small channels are suitable. c. Pumped drainage generally has a high instantaneous flow rate; therefore, regardless of the daily volume of water discharged, a buffer weir should be installed to ensure that the water flows into the metering tank at a steady rate. B. The flow measurement section of the metering tank shall comply with the following requirements: a. When using the weir tank method or weir-tank-based flow meters for flow measurement, an open channel that meets the \"Standards for Measuring Urban Drainage Flow with Weir Tanks\" (CJ/T 3008.1–5–93) must be constructed. b. When using the flow velocity meter method for flow measurement, it is necessary to construct a straight transition section with a hard and smooth bottom, a regular geometric cross-section, and a length of not less than 3–5 meters. The designed water depth should be at least 0.1 meter (for systems equipped with automatic online water quality monitoring systems, this value should be at least 0.3 meters), and the flow velocity should be at least 0.05 meters per second. The specific requirements shall be in accordance with the instructions for using the flow meter. c. When using the float method for flow measurement, a channel that is at least 10 meters long, with a regular cross-section, a horizontal bottom free of gradients or bends, steady water flow, and a consistent water level height, is required. d. The container method is used for flow measurement; there should be an appropriate height difference between the overflow outlet and the receiving water body, or this difference can be created using a conduit, with the flow rate being low. e. For waste discharge pipes, a pipe-specific electromagnetic flowmeter must be installed in the flow measurement section; however, the pipe must be recessed into the ground, with the flowmeter placed at the bottom of this recess, in order to enable calculation over the full range. 6.6 The sampling location of the automatic online water quality monitoring system should be placed as close as possible to the center of the flow path in the measuring tank, with the sampling port located 10–20 cm below the water surface. For wastewater containing a large amount of floating debris, a metal screen with a mesh size of 10–20 mesh can be used to prevent such debris from blocking the sampling ports. 6.7 Flow meters for wastewater should also be installed at the discharge outlets of general pollution-emitting units as much as possible; if this is not feasible, weir-type flow measurement devices or other measuring devices can be used. The weir channel flow measurement device shall meet the requirements of the standard \"Open-channel Weir Channel Flow Meters\" (JJG711-90). Ultrasonic open-channel sewage flow meters shall meet the requirements of the standard \"Ultrasonic Open-Channel Sewage Flow Meters\" (HJ/T15-1996). 6.8 In cases where, due to special circumstances, it is not possible to construct a flow measurement section and install a sewage flow meter, the sewage-discharging entity shall explain the reasons to the environmental protection authorities, and the method used for calculating the flow rate of its sewage (waste water) must be approved by those authorities. 6.9 The technical requirements for the installation of automatic online water quality monitoring systems shall comply with the standards such as \"Ultrasonic Open-channel Sewage Flow Meter\" (HJ/T15-1996), \"Technical Requirements for Automatic pH Water Quality Analyzers\" (HJ/T96-2003), \"Technical Requirements for the Certification of Environmental Protection Products – Online Automatic Monitors for Chemical Oxygen Demand (CODcr) in Water Quality\" (HBC6-2001), and \"Technical Requirements for Automatic Online UV Absorption Water Quality Monitors\" (HJ/T191-2005). 6.10 Environmental protection graphic signs for wastewater discharge outlets should be installed in a prominent location near the outlet. If the emission outlet is concealed or located outside the plant boundary, the sign can also be placed in a prominent location near the monitoring and sampling point. 6.11 Installation of environmental protection graphic signs 6.11.1 All sewage discharge points (sources) of entities that discharge pollutants or waste water must be brought under standardized management; in accordance with the **Standards for Environmental Protection Graphic Signs** (GB15562.1-1995), appropriate environmental protection graphic signs must be installed there. 6.11.2 Environmental protection signboards should be installed in a prominent location near the sewage (waste water) discharge point (source) or sampling site, and they must be able to remain in place for a long time. The recommended height is generally: 2 meters from the ground to the top edge of the environmental protection graphic sign. 6.11.3 For the wastewater discharge outlets (sources) of key polluting units, vertical signboards should be installed primarily ； For the pollutant emission outlets (sources) of general pollution-emitting units, vertical or horizontal fixed signs can be selected for installation as appropriate. 6.11.4 For general sewage (wastewater) discharge outlets (sources), install indicative environmental protection graphic signs ； Warning environmental protection graphic signs shall be installed at the outlets (sources) for discharging wastewater containing highly toxic substances, carcinogens, and other materials that pose serious risks to human health. 6.11.5 Environmental protection graphic signs shall be manufactured at designated sites in accordance with the **Standard for Environmental Protection Graphic Signs (GB15562.1-1995)**, and their production is supervised by the Municipal Environmental Protection Bureau. a. Shape and size of signs: Warning signs have a triangular frame, while guidance signs have a square frame. Dimensions of flat, fixed signs: the side length of warning signs is 0.42 meters, while the length of advisory signs is 0.48 meters and their width is 0.3 meters ； Dimensions of vertical fixed signs: the side length of warning signs is 0.56 meters, while the length and width of guidance signs are both 0.42 meters. The height of the pole is such that the top of the sign is 2 meters above the ground and 0.3 meters below it. b. The sign boards are made of 1.5–2 mm cold-rolled steel plates, while the poles are made of 38×4 seamless steel pipes; the surfaces are covered with special anti-counterfeiting film. c. Sign color: The background and posts of warning signs are yellow, while the patterns, borders, supports, and text on the auxiliary signs are black ； The background and posts of the indicator signs are green, while the patterns, borders, supports, and text on the auxiliary signs are white; the font used for the text is bold. d. Format of content for sign auxiliary markers: The first line is the company name, the second line is the emission outlet number, and the third line is the type of pollutant. The content of the sign’s auxiliary markings must be consistent with the relevant information in the wastewater discharge declaration form. The numbering format for discharge outlets is standardized as follows: For wastewater, WS—×××××. The first two letters of the code represent the category of waste being discharged, while the subsequent five digits indicate the sequential number of the discharge outlet. The sequential numbering of the emission outlets is determined by the local environmental protection authorities. 6.10.6 For the fields that need to be filled in on the auxiliary signs of environmental protection graphic signs, the Municipal Environmental Protection Bureau shall specify the requirements for filling them out; the handwriting must be neat, and the color of the text should be in harmony with the color of the sign. 6.12 Establishment of records for the standardization of emission outlets 6.12.1 Environmental protection departments at all levels and entities that emit pollutants must use the \"Standardized Emission Outlet Registration Certificate\" printed uniformly by the municipal environmental protection bureau, and fill in the relevant information carefully as required. 6.12.2 The registration certificate and signboard are used in conjunction, and are issued by the local environmental protection agency to the relevant polluting entities. The number on the sign in the register list and the number on the sign’s registration card should match the number on the sign’s auxiliary marker. 6.12.3 The local environmental protection agency establishes a management file for emission outlets based on the information contained in the registration certificate, including: the name of the polluting entity, the type and number of emission outlets, the geographical location of these outlets, the types, quantities, and concentrations of the main pollutants emitted, the destination of these emissions, information regarding signage in place, the operating status of the facilities, and suggestions for improvements. 7. Quality assurance for the standardization of wastewater discharge outlets 7.1 Requirements for standardizing discharge outlets include the certification of the measuring equipment used in automatic monitoring systems. 7.1.1 Waste-discharging entities should choose automatic monitoring equipment that is listed in the catalogs of online monitoring instruments and equipment maintained by the **National Environmental Protection Administration and the local environmental protection bureaus, and they must submit the technical plans for installing such monitoring equipment along with related facilities to the local environmental protection bureau for record-keeping. 7.1.2 After the wastewater flow meter is put into operation, the waste-discharging entity shall apply to the local metrology department for calibration every year to obtain a metrology calibration certificate. 7.1.3 For automatic monitoring equipment that cannot undergo metrological certification at the moment, it shall be entrusted to a unit with monitoring qualifications for comparative monitoring and calibration, and this shall be carried out no less than twice a year. 7.2 Operation and management of automatic monitoring equipment: Facilities that install flow meters and other automatic monitoring equipment should give priority to selecting entities with the qualifications for operating environmental protection facilities to be responsible for the daily maintenance and management of such equipment. 8. Acceptance of the standardization of wastewater (effluent) discharge outlets 8.1 Acceptance conditions a. There shall be no more than two total wastewater discharge outlets per separate plant site. b. The units that require separation of clean and dirty water have implemented such separation. c. Sampling ports that facilitate sampling and flow measurement are provided at the total wastewater discharge outlet, as well as at the inlet and outlet of the wastewater treatment facilities ； Sampling ports that facilitate sampling have been installed at the emission outlets of workshops that emit Class 1 pollutants. d. The sampling point for the total wastewater discharge outlet is located at the factory boundary (except in special cases). e. The standardized emission outlets of key polluting units that meet the requirements of paragraphs 4.1 and 4.2 of these regulations are equipped with flow meters or online monitoring devices that have passed **product certification. Online monitoring instruments shall meet the requirements of standards such as \"Ultrasonic Open-channel Sewage Flow Meter\" (HJ/T15-1996), \"Technical Requirements for Automatic pH Water Quality Analyzers\" (HJ/T96-2003), \"Technical Requirements for the Certification of Environmental Protection Products – Online Automatic Monitors for Chemical Oxygen Demand (CODcr) in Water Quality\" (HBC6-2001), and \"Technical Requirements for Automatic Online UV Absorption Water Quality Monitors\" (HJ/T191-2005). Monitoring data should be interconnected at three levels: the polluting enterprises, the county and city environmental protection bureaus, and the provincial environmental protection bureau. f. At each wastewater sampling point of the general treatment facility, measuring and recording devices such as triangular weirs, rectangular weirs, and flow measurement channels that meet standard measurement requirements are installed. 8.2 Signage at discharge outlets a. All sewage (waste water) discharge outlets (sources) are equipped with environmental protection signboards that meet the requirements of the **Standard for Environmental Protection Graphic Signs** (GB15562.1-1995). b. Environmental protection graphic signs should be installed in a prominent location near the sampling point (monitoring site) and should be able to remain in place for a long time. The upper edge of the environmental protection graphic sign should be 2 meters above the ground. c. Advisory environmental protection graphic signs for the installation of general wastewater discharge outlets (sources) ； Warning environmental protection graphic signs should be installed at the outlets (sources) for discharging wastewater containing highly toxic substances, carcinogens, and other materials that pose serious risks to human health. 8.3 Documentation of emission outlets a. Use the \"Standardized Emission Outlet Registration Certificate\" and fill in the relevant information as required. b. An emission outlet management file was established based on the information contained in the registration certificate (including the name of the polluting entity, the nature and number of emission outlets, the geographical location of the emission outlets, the types, quantities, and concentrations of the main pollutants emitted, the destination of those emissions, the status of relevant monitoring systems, and the operation status of pollution control facilities). 8.4 Acceptance Procedures 8.4.1 Document Review The standardized documentation on emission sources provided by the emitting entity should include the following information: A. Basic information such as industry category, competent authority, scale of the enterprise, main products, production volume, quantities and usage of raw and auxiliary materials, as well as annual water and coal (oil) consumption of the enterprise. Appendix: Table of main products and raw materials and auxiliary materials ； Unit orientation and floor plan. B. Main production processes: The production processes for the main products. Figure: Process flow diagram. C. Major pollution sources and pollutant emissions: Types of pollutants, point sources of emission for major pollutants, frequency of emission, methods of emission, and destinations of emissions ； Location of emission outlets and status of pollution treatment facilities. D. Contents of treatment for wastewater discharge outlets: total wastewater discharge outlets, discharge outlets of workshops emitting Class 1 pollutants, number and location of inlet and outlet ports of various wastewater treatment facilities ； Sampling points, settings of sampling platforms, locations of flow measurement sections ； Type of flow measurement device or metering device, model of flowmeter, quantity, renovation time ； Number of environmental protection graphic signs, and locations where they are installed. Appendix: Plan view showing the geographical location of the wastewater discharge outlet, photos of the discharge outlet ； Sampling, water use, drainage processes, and water balance diagram (indicating the locations of various wastewater discharge points and sampling sites, as well as the locations of flow measurement sections). E. Automatic monitoring equipment and supporting facilities: a. Application report for the acceptance of automatic monitoring equipment, acceptance application form, project summary, final account statement of project funds, and comparison test reports on equipment acceptance provided by qualified monitoring units. b. Data from the automatic monitoring and summarization of equipment operation over 30 days, as well as technical documents related to the debugging, calibration, and testing of the monitoring equipment. c. Management system for the automatic monitoring of equipment operation. d. Other relevant documents that meet the technical specifications and requirements for acceptance. e. If the automatic monitoring equipment is operated and managed by a third-party service provider, the polluting entity must provide a contract outlining the terms under which the equipment is managed by that commissioned service provider. F. Standardized emission outlet records: Copies of the main and secondary certificates for the standardized emission outlet registration ； Summary Table of Standardization and Rectification of Emission Outlets ； Form for the acceptance of standardized rectification of emission outlets. 8.4.2 On-site inspection: The county or city environmental protection bureaus retrieve the real-time monitoring data from units that have carried out standardized improvements to their emission outlets ； A inspection was conducted at the site where the discharge outlets of the polluting entities were being standardized. 8.4.3 Acceptance Comments: Acceptance comments are formulated based on the review of documents and the results of on-site inspections. Requirements for rectification are issued to pollution-discharging entities that fail the acceptance inspection. 8.5 Acceptance Results 8.5.1 Polluting units that pass the acceptance inspection must submit the relevant acceptance documents to the local environmental protection authorities for record-keeping, after which the equipment installed for standardizing their emission outlets can be put into normal operation. 8.5.2 For polluting entities that fail to meet the requirements for standardized rectification and acceptance at the emission outlets, the local environmental protection department shall order them to make corrections within a specified time frame, and impose penalties in accordance with ** and the relevant local laws and regulations. 9. Management of standardized facilities for waste discharge 9.1 Operational management 9.1.1 Waste-discharging entities shall include the facilities related to standardized discharge outlets within the scope of their equipment management, establish corresponding management methods and regulations, and assign full-time or part-time personnel with a strong sense of responsibility, as well as the necessary professional knowledge and skills, to oversee these discharge outlets, ensuring clear responsibilities and defined rewards and penalties. 9.1.2 The emission source entity shall be responsible for the proper operation of the environmental protection facilities at the emission points, maintaining the clarity and integrity of environmental protection signs, ensuring the proper functioning of sampling points as well as online monitoring instruments and equipment, so as to guarantee that all types of pollutants are emitted at levels that meet the specified standards. 9.1.3 When there are changes in the location of the emission outlets or the types of pollutants, the polluting entity shall promptly report to the local environmental protection department, and upon approval, update the relevant contents on the signboards and registration certificates. 9.2 Supervision and Management 9.2.1 The facilities related to standardized emission outlets (such as measurement and monitoring devices, signs, etc.) are part of the pollution control facilities. Environmental protection departments in various regions should strengthen daily supervision and management in accordance with the regulations regarding the supervision and management of such pollution control facilities. 9.2.2 After the environmental protection graphic signs are installed, no unit or individual shall remove, move, or alter them without permission. 9.2.3 After the installation of automatic monitoring equipment, no unit or individual shall remove, leave it unused, or damage it without authorization.

Technical Requirements for the Standardized Rectification of Waste Discharge Outlets (Trial) (May 20, 1996, **Environmental Protection Bureau Document No. Huan Jian 470) Chapter 1 General Provisions 1.1 These Requirements are formulated in accordance with **environmental protection laws and regulations, the standards for **Environmental Protection Graphic Symbols, and the spirit of the **Environmental Protection Bureau’s Notice on Carrying Out Pilot Projects for the Standardized Rectification of Waste Discharge Outlets. 　　1.2 The standardized regulation of discharge outlets is one of the fundamental tasks in implementing the total pollutant control plan. Its purpose is to encourage enterprises that discharge pollutants to improve their operational management and pollution control measures, to strengthen environmental supervision and enforcement, and to better fulfill their responsibilities related to \"three inspections, two surveys, and one fee collection\". This approach aims to achieve scientific and quantitative management of pollutant emissions over time. 　　1.3 The standardized rectification of discharge outlets should follow the principles of facilitating sample collection, enabling measurement and monitoring, and supporting routine on-site inspections. 　　1.4 These Requirements apply to the standardized rectification of discharge outlets of all pollution-discharging entities. Chapter 2 Scope of Standardized Rectification for Discharge Outlets 2.1 All discharge outlets (points, sources) of entities that discharge pollutants into the environment (wastewater, exhaust gas, solid waste, noise) must undergo standardized rectification. 　　2.2 The standardized rectification of discharge outlets can be carried out in stages. During the pilot period, the scope of rectification should cover at least 50% of the units within the jurisdiction that are subject to pollution discharge fees, and the following four principles should be followed (2.3–2.6). 　　2.3 Focus on the rectification of sewage discharge outlets, while also addressing exhaust gas, solid waste, and noise emission outlets (points and sources). 　　2.4 Focus on rectifying key pollution sources. Priority is given to rectifying the discharge outlets of those listed as key polluting units at the ** and provincial/municipal levels. 　　2.5 The focus is on regulating the discharge outlets of the 12 pollutants included in the total emission control targets (soot, industrial dust, sulfur dioxide, chemical oxygen demand, petroleum compounds, cyanides, arsenic, mercury, lead, hexavalent chromium, and industrial solid waste). 　　2.6 To reflect the principle of pilot projects, it is necessary to select the discharge outlets of pollution-emitting units of different types, industries, standards, and affiliations for renovation separately. Chapter 3 Technical Requirements for the Standardized Rectification of Wastewater Outlets 3.1 Rectification of Wastewater Discharge Outlets 3.1.1 Determining the location of wastewater discharge outlets appropriately. 　　3.1.2 Set sampling points in accordance with the Technical Specifications for Pollutant Source Monitoring. Examples include: the main emission outlet of a factory, the emission outlets of workshops that discharge category 1 pollutants, as well as the inlet and outlet of wastewater treatment facilities. 　　3.1.3 A standardized flow measurement section that facilitates the measurement of flow rate and velocity should be provided. 　　3.1.4 Flow meters shall be installed at the sewage discharge outlets designated for focused treatment. 　　3.1.5 Flow measurement devices such as triangular weirs, rectangular weirs, flow channels, or other metering devices can be installed at general sewage outfalls. 　　3.2 Rectification of exhaust gas outlets 　3.2.1 Exhaust gases emitted in an organized manner. Rectify the number, height, and leakage conditions of its exhaust stacks. 　　3.2.2 The exhaust stack shall be equipped with sampling ports that facilitate sampling and monitoring. The setting of the sampling ports shall comply with the requirements of the \"Technical Specifications for Monitoring Pollution Sources\". 　　3.2.3 If the location of the sampling port does not meet the requirements of the “Specifications”, the location of the monitoring wells shall be determined by the local environmental monitoring authority. 　　3.2.4 For uncontrolled emissions of toxic and harmful gases, exhaust ventilation systems should be installed for collection and treatment, and sampling points should be established. 　　3.3 Remediation of solid waste storage and dumping sites 3.3.1 Specialized storage and dumping sites should be provided for general solid waste. For storage and stacking areas where secondary dust generation is likely, preventive measures such as irregular spraying should be taken. 　　3.3.2 For hazardous waste such as toxic and harmful solid wastes, dedicated storage areas should be provided, along with preventive measures to prevent dispersion, loss, and leakage. 　　3.3.3 Temporary solid waste storage and dumping sites should also be properly managed according to the circumstances. 　　3.4 Remediation of fixed noise emission sources 　3.4.1 Where the noise level at the factory boundary exceeds the requirements set by the environmental noise standards for that area, the corresponding noise sources must be remediated. 　　3.4.2 Depending on the characteristics of different noise sources, measures such as vibration reduction and noise suppression, sound absorption for noise reduction, and sound insulation for noise reduction can be adopted to meet the standard requirements of the functional area. 　　3.4.3 Install monitoring points for the noise source at those locations within the plant boundary where noise is sensitive and where its impact on the outside environment is greatest. Chapter 4 Requirements for Installing Signage and Maintaining Records at Discharge Points 4.1 Requirements for Installing Signage at Discharge Points 4.1.1 All pollution discharge points (sources) of pollution-generating entities, as well as sites for the storage and disposal of solid waste, must be brought under standardized management. In accordance with the provisions of the **Standards for Environmental Protection Graphic Signs** (GB15562.1—1995) (GB15562.2—1995), appropriate environmental protection graphic signs must be installed there. 　　4.1.2 Units that carry out standardized rectification of emission sources and solid waste storage and disposal sites must use environmental protection signage uniformly designed and supervised by the **Environmental Protection Bureau. 　　4.1.3 The installation locations of environmental protection graphic signs should be in a place that is close to and visible from the pollutant emission sources as well as solid waste storage/disposal sites or sampling points, and they should be able to remain in place for a long time. In particular, signs indicating noise emission sources should be placed in a location that is close to the designated monitoring points and is easily visible. The recommended height is generally: 2 meters from the ground to the top edge of the environmental protection graphic sign. 　　4.1.4 For the pollutant emission outlets (sources) of key polluting enterprises, or sites for the storage and disposal of solid waste, vertical signboards should be installed primarily ； For the pollutant emission outlets (sources) of general polluting entities, or the sites for the storage and disposal of solid waste, vertical or horizontal fixed signboards can be selected for installation as appropriate. 　　4.1.5 At general pollutant discharge outlets (sources) or solid waste storage and disposal sites, warning environmental protection graphic signs shall be installed. 　　Warning environmental protection graphic signs shall be installed at emission outlets (sources) that release highly toxic substances, carcinogens, and substances that pose serious hazards to human health, as well as at sites for the storage and disposal of hazardous waste. 　　4.1.6 On the auxiliary signs of environmental protection graphic signs, the fields that need to be filled in shall be filled out in a unified manner by the environmental protection department; the handwriting should be neat, and the color of the text should be in harmony with the color of the sign. 　　4.2 Requirements for maintaining records of discharge outlets 4.2.1 Environmental protection departments at all levels and entities that discharge pollutants must use the \"Standardized Discharge Outlet Label Registration Certificate\" printed uniformly by the **Environmental Protection Bureau**, and fill in the relevant information carefully as required. 　　4.2.2 The registration certificate and signboard are used in conjunction, and are issued by the local environmental protection departments to the relevant polluting entities. The number on the sign in the register list and the number on the sign’s registration card should match the number on the sign’s auxiliary marker. The numbering format is specified as follows: Wastewater WS－××××, Noise ZS－×××××, Exhaust Gas FQ－××××, Solid Waste GF－×××××. The first two letters of the code represent the category, while the subsequent five digits indicate the sequential number of the emission source. The sequential numbering of wastewater discharge outlets is determined by the local environmental protection departments. 　　4.2.3 Environmental protection agencies in various regions establish management records for pollution discharge outlets based on the information contained in the registration certificates. These records include details such as the name of the polluting entity, the type and number of pollution discharge outlets, the geographical location of these outlets, the types, quantities, and concentrations of the main pollutants discharged, the destination of these pollutants, information regarding the installation of signs, the operating status of the related facilities, and suggestions for improvements. 　　4.3 Requirements for the management of environmental protection facilities at discharge points 4.3.1 The facilities related to the regulation of discharge points, such as measuring devices and signage, are considered environmental protection facilities. Environmental protection agencies in various regions should carry out regular supervision and management in accordance with the relevant regulations on the supervision and management of such facilities. Discharge entities should incorporate these environmental protection facilities into their equipment management systems and establish corresponding management methods and rules. 　　4.3.2 Discharge entities shall assign full-time or part-time personnel with a strong sense of responsibility, as well as professional knowledge and skills, to manage the discharge outlets, ensuring clear responsibilities and defined rewards and penalties.