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HJ 169-2018: Technical guidelines for environmental risk assessment on projects
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Basic data | Standard ID | HJ 169-2018 (HJ169-2018) | | Description (Translated English) | Technical guidelines for environmental risk assessment on projects | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z06 | | Word Count Estimation | 55,561 | | Issuing agency(ies) | Ministry of Ecology and Environment | HJ 169-2018: Technical guidelines for environmental risk assessment on projects---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical guidelines for environmental risk assessment on projects
attachment1
National Environmental Protection Standard of the People's Republic
Replace HJ/T 169-2004
Technical guidelines for environmental risk assessment of construction projects
Published on.2018-10-14
2019-03-01 Implementation
Ministry of Ecology and Environment released
Content
Foreword..II
1 Scope.1
2 Normative references 1
3 Terms and Definitions.1
4 General. 2
5 Risk Survey 5
6 Environmental risk potential initial judgment. 5
7 Risk Identification 6
8 Risk accident situation analysis.7
9 Risk Prediction and Evaluation 8
10 Environmental Risk Management 11
11 Evaluation conclusions and recommendations.12
Appendix A (Normative Appendix) Simple Analysis of Basic Content 13
Appendix B (informative appendix) Dangerous substances and critical masses of concern..14
Appendix C (Normative) Classification of Hazardous Substances and Process Systems Hazard (P)..24
Appendix D (Normative) Classification of Environmental Sensitivity (E)..26
Appendix E (informative) Recommended value for leakage frequency 28
Appendix F (informative appendix) Accident source strength calculation method 29
Appendix G (Normative Appendix) Recommended Model for Atmospheric Risk Prediction..34
Appendix H (informative) Atmospheric toxicity endpoint concentration value selection 37
Appendix I (informative) Estimation of the probability of atmospheric damage from toxic and harmful gases.45
Appendix J (Normative Appendix) Report Drawings, Schedule Requirements 47
Appendix K (informative) Environmental Risk Assessment Self-checklist. 52
Foreword
Standardize environmental risks in order to implement the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on Environmental Impact Assessment
Evaluation work, strengthen environmental risk prevention and control, and develop this standard.
This standard specifies the general principles, contents, procedures and methods for environmental risk assessment of construction projects.
This standard is a revision of the Technical Guidelines for Environmental Risk Assessment of Construction Projects (HJ/T 169-2004). The main revisions are.
-- Adjusted the scope of application and connected with the reconstruction system of environmental impact assessment guidelines;
-- Adjust and supplement the relevant terms and definitions;
-- Increased the risk potential initial judgment and improved the evaluation work classification method;
- Standardize the content and methods of risk identification and source item analysis;
-- Optimized and adjusted the atmospheric and surface water risk prediction and evaluation content;
-- Increased technical requirements for groundwater risk prediction and evaluation;
-- Adjusting and refining the content of risk prevention measures;
-- Added evaluation conclusions and recommendations section;
-- Supplemented and improved the appendix and added the requirements for the preparation of drawings and schedules.
Appendix A, Appendix C, Appendix D, Appendix G, and Appendix J of this standard are normative appendices; Appendix B, Appendix E, Appendix F, Appendix H,
Appendix I and Appendix K are informative annexes.
From the date of implementation of this standard, the “Technical Guidelines for Environmental Risk Assessment of Construction Projects” (HJ/T 169-2004) shall be abolished.
This standard was formulated by the Ministry of Ecology and Environment.
This standard is mainly drafted by. Environmental Engineering Evaluation Center of the Ministry of Environmental Protection, China Ryukyu Engineering Co., Ltd.
This standard is approved by the Ministry of Ecology and Environment on October 14,.2018.
This standard has been implemented since March 1,.2019.
This standard is explained by the Ministry of Ecology and Environment.
Technical guidelines for environmental risk assessment of construction projects
1 Scope of application
This standard specifies the general principles, contents, procedures and methods for environmental risk assessment of construction projects.
This standard applies to the production, use and storage of toxic and harmful and flammable and explosive substances (including pipeline transportation).
Environmental risk assessment of sudden accidents (excluding accidents caused by man-made damage and natural disasters) that may occur in construction projects.
This standard does not apply to ecological risk assessment and environmental risk assessment of nuclear and radiation construction projects.
For construction projects that have specific industry environmental risk assessment technical specifications, the general principles specified in this standard apply.
The environmental risk assessment in the relevant planning environmental impact assessment can refer to this standard.
2 Normative references
This standard refers to the following documents or their terms. For undated references, the latest edition applies to this
standard.
GB 3095 Ambient Air Quality Standard
GB 3097 seawater quality standard
GB 3838 Surface Water Environmental Quality Standard
GB 5749 Sanitary Standard for Drinking Water
GB 30000.18-2013 Classification and labelling of chemicals - Part 18. Acute toxicity
GB 30000.28-2013 Classification and labelling of chemicals - Part 28. Harm to the aquatic environment
GB/T 14848 Groundwater Quality Standard
GB/T 19485 Technical Guidelines for Environmental Impact Assessment of Marine Engineering
HJ 2.1 General Outline of Technical Guidelines for Environmental Impact Assessment of Construction Projects
HJ 2.2 Technical Guidelines for Environmental Impact Assessment Atmospheric Environment
HJ 2.3 Environmental Impact Assessment Technical Guidelines Surface Water Environment
HJ 610 Environmental Impact Assessment Technical Guidelines Groundwater Environment
HJ 941 Enterprise Risk Assessment Method for Environmental Incidents
"Catalogue of Classified Management of Environmental Impact Assessment of Construction Projects"
National Emergency Response Plan for Environmental Emergencies (State Council Letter [2014] No. 119)
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Environmental risk
The extent and possibility of harm to the environment caused by sudden accidents.
3.2
Environmental risk potential
The generalized analysis of the degree of potential environmental hazards of construction projects is based on the material and process system risks involved in the construction project.
A comprehensive representation of the danger and the environmental sensitivity of its location.
3.3
Risk source
There is a source of accidental release of matter or energy and may create an environmental hazard.
3.4
Hazardous substance
A substance that is inflammable, explosive, toxic, and harmful, and causes harm to the environment.
3.5
Hazard unit hazard unit
Units with relatively independent functions consisting of one or more risk sources should be implemented with other function sheets in the event of an accident
The division of the yuan.
3.6
Maximum credible event
It is based on empirical statistical analysis, which causes the most serious environmental hazard in accidents that occur within a certain probability range.
3.7
Atmospheric toxicity endpoint concentration
Short-term exposure to personnel may result in a concentration of atmospheric pollutants that may have a health impact or death, used to determine the surrounding environmental risks
influence level.
4 General
4.1 General principles
The environmental risk assessment shall aim at the prevention and control of acute damage to the hazardous materials caused by sudden accidents, and the environmental wind of the construction project.
Risk analysis, forecasting and evaluation, environmental risk prevention, control, mitigation measures, environmental risk monitoring and emergency recommendations
Seeking to provide a scientific basis for the prevention and control of environmental risks in construction projects.
4.2 Evaluation procedures
The evaluation work procedure is shown in Figure 1.
Risk investigation
Risk source environmentally sensitive target
Initial judgment of environmental risk potential
Risky environmental sensitivity
Consider adjusting the risk potential as I risk potential is II~IV risk potential is IV simple analysis
Risk Identification
Risk source item risk type may spread the path may affect the consequences
Risk accident situation analysis
Risk source strong model selection parameter setting
Risk prediction and evaluation
Environmental risk management
Evaluation conclusions and recommendations
B3
Figure 1 Evaluation work procedure
4.3 Evaluation of work level division
The environmental risk assessment work level is divided into first, second and third levels. According to the material and process system involved in the construction project
Risk and location environmental sensitivity determine the environmental risk potential, and determine the evaluation work level according to Table 1. The risk potential is IV and
Above, carry out the first-level evaluation; the risk potential is III, carry out the second-level evaluation; the risk potential is II, carry out the three-level evaluation; risk potential
The potential is I, and a simple analysis can be carried out.
Table 1 Evaluation of work level
Environmental Risk Potential IV, IV III II I
Evaluation work level one two three simple analysis a
a is relative to the detailed evaluation of the work, in the description of hazardous substances, environmental impacts, environmental hazards, risk prevention measures, etc.
A definitive explanation. See Appendix A.
4.4 Evaluation work content
4.4.1 The basic content of environmental risk assessment includes risk investigation, initial judgment of environmental risk potential, risk identification, and risk accident situation.
Analysis, risk prediction and evaluation, environmental risk management, etc.
4.4.2 Based on the risk survey, analyze the risk and environmental sensitivity of the construction project material and process system, and judge the risk potential.
Determine the level of risk assessment.
4.4.3 Risk identification and risk accident situation analysis should identify the main distribution of hazardous substances in the production system, screening is representative
In the case of a risk accident, the source of the accident is reasonably set.
4.4.4 Each environmental element shall carry out predictive evaluation according to the determined evaluation work level, and analyze and explain the scope and extent of environmental risk hazard.
Put forward the basic requirements for environmental risk prevention.
4.4.4.1 Atmospheric environmental risk prediction. The first-level evaluation needs to select the most unfavorable meteorological conditions and the most common meteorological conditions in the place where the accident occurred.
Select the applicable numerical method for analysis and prediction, and give the range of atmospheric environmental impacts that may be caused by the release of dangerous substances in the event of a risk accident.
With degree. For projects with extremely high atmospheric environmental risks, further analysis of the probability of interest should be carried out. Secondary evaluation needs to choose the least
For meteorological conditions, select the applicable numerical method for analysis and prediction, and give the large possible release of dangerous substances in the case of risk accidents.
The extent and extent of the gas environment impact. The three-level evaluation should be qualitatively analyzed to explain the consequences of atmospheric environmental impact.
4.4.4.2 Surface water environmental risk prediction. The primary and secondary evaluations should select the applicable numerical method to predict the surface water environmental risk.
The extent and extent of the impact that may be caused by the risk accident; the third-level evaluation shall be qualitatively analyzed to explain the environmental impact of the surface water.
4.4.4.3 Groundwater environmental risk prediction. The first-level evaluation should give priority to the applicable numerical method to predict the groundwater environmental risk, and give
The extent and extent of the impact that may be caused by a risk accident; if it is lower than the first-level evaluation, the risk prediction analysis and evaluation requirements refer to
HJ 610 is executed.
4.4.5 Propose environmental risk management countermeasures, and clarify environmental risk prevention measures and emergency environmental emergency preparedness requirements.
4.4.6 Comprehensive environmental risk assessment process, giving evaluation conclusions and recommendations.
4.5 Evaluation scope
4.5.1 Atmospheric environmental risk assessment scope. The first-level and second-level evaluations are generally not less than 5 km from the boundary of the construction project;
The project boundary is generally not less than 3 km. The first-level and second-level evaluation of oil and gas and chemical pipeline projects are generally on both sides of the pipeline centerline.
The height is not less than.200 m; the third-level evaluation is generally not less than 100 m from both sides of the pipeline center line. When the atmospheric toxicity endpoint concentration is predicted to arrive
When the distance exceeds the evaluation range, the evaluation range should be further adjusted according to the predicted arrival distance.
4.5.2 The scope of surface water environmental risk assessment is determined by reference to HJ 2.3.
4.5.3 The scope of groundwater environmental risk assessment is determined by reference to HJ 610.
4.5.4 The scope of environmental risk assessment should be based on the distribution of environmentally sensitive targets and the consequences of accidents that may cause harm to the environment.
Such as comprehensive determination. In the area around the project, there are environmentally sensitive targets that require special attention outside the scope of evaluation, and the scope of evaluation needs to be extended.
To the goal of concern.
5 Risk investigation
5.1 Construction project risk source survey
Investigate the quantity and distribution of hazardous materials in construction projects, the characteristics of production processes, and collect safety technical specifications for hazardous materials.
Basic information such as (MSDS).
5.2 Environmentally sensitive target survey
According to the possible impacts of dangerous substances, clear environmentally sensitive targets, and give environmentally sensitive target location maps, list
Identify information such as survey objects, attributes, relative orientation, and distance.
6 Environmental risk potential initial judgment
6.1 Environmental risk potential division
The environmental risk potential of construction projects is divided into I, II, III, IV/IV.
According to the dangers of the materials and process systems involved in the construction project and the environmental sensitivity of the location, combined with the accident situation
Under the environmental impact approach, generalize the potential environmental hazard of the construction project, and determine the environmental risk potential according to Table 2.
Table 2 Environmental risk potential division of construction projects
Environmental sensitivity (E)
Hazardous substances and process system hazards (P)
Extremely high hazard (P1) High hazard (P2) Moderate hazard (P3) Mild hazard (P4)
Environmentally sensitive area (E1) IV IV III III
Environmentally moderately sensitive area (E2) IV III III II
Environmentally sensitive area (E3) III III II I
Note. IV is extremely high environmental risk.
6.2 P grading determination
Analyze the toxic, flammable and inflammable substances involved in the production, use and storage of construction projects. See Appendix B for confirmation.
The critical amount of hazardous materials. Quantitative analysis of the ratio of the amount of hazardous substances to the critical amount (Q) and the characteristics of the industry and production process
(M), in accordance with Appendix C, judge the hazardous substances and process system hazard (P) levels.
6.3 E grading determination
Analyze the environmental impact pathways of hazardous materials in the event of an accident, such as the atmosphere, surface water, groundwater, etc., in accordance with Appendix D.
The environmental sensitivity level (E) level of each factor of the construction project is judged.
6.4 Judging the potential risk of construction projects
The comprehensive level of the environmental risk potential of the construction project takes the relatively high value of each factor level.
7 Risk identification
7.1 Risk Identification Content
7.1.1 Identification of material hazards, including major raw and auxiliary materials, fuels, intermediate products, by-products, final products, pollutants,
Fires and explosions associated with secondary organisms.
7.1.2 Production system hazard identification, including major production facilities, storage and transportation facilities, public works and auxiliary production facilities, and
Environmental protection facilities, etc.
7.1.3 Identification of pathways for the transfer of hazardous substances to the environment, including analysis of the characteristics of hazardous substances and possible types of environmental risks, identification
The way in which hazardous substances affect the environment and analyze environmentally sensitive targets that may affect them.
7.2 Risk identification method
7.2.1 Data collection and preparation
Collect and prepare construction items based on the types of environmental risks that may result from sudden accidents such as hazardous material spills, fires, and explosions
Project data, surrounding environmental data, domestic and foreign industry, the same type of accident statistical analysis and typical accident case data. Right
The construction project shall collect environmental management system, operation and maintenance manual, emergency plan for emergency environmental incidents, emergency training, drill record, calendar
Historical environmental incidents and production safety accident investigation data, equipment failure statistics, etc.
7.2.2 Material Hazard Identification
According to the hazardous substances identified in Appendix B, the flammable, explosive, toxic and hazardous characteristics are given in the form of a chart, and the danger is clearly defined.
Distribution of dangerous materials.
7.2.3 Production system hazard identification
7.2.3.1 According to the process flow and the layout of the functional zoning, combined with the material hazard identification, the dangerous unit is given in the form of a chart.
The result and the maximum amount of hazardous substances in the unit. Analyze potential sources of risk within hazardous units according to the production process.
7.2.3.2 Analyze the hazard, existence conditions and conversion factors of the risk source according to the hazard unit.
7.2.3.3 Use qualitative or quantitative analysis methods to identify key risk sources.
7.2.4 Environmental Risk Types and Hazard Analysis
7.2.4.1 Types of environmental risks include leakage of hazardous materials, as well as associated/secondary pollutant emissions from fires, explosions, etc.
7.2.4.2 Analyze the type of environmental risks and the transfer of hazardous substances to the environment based on the results of the hazardous identification of substances and production systems.
Ways and ways of influence.
7.3 Risk identification results
On the basis of risk identification, the distribution of dangerous units is illustrated. Give a summary of the environmental risk identification of the construction project, including the danger list
Elements, sources of risk, major hazardous substances, types of environmental risks, environmental impact pathways, and environmentally sensitive targets that may be affected,
Explain the main parameters of the risk source.
8 Risk accident situation analysis
8.1 Risk accident situation setting
8.1.1 Risk accident situation setting content
On the basis of risk identification, select the type of accident that has a large impact on the environment and representative, and set the risk accident situation. wind
The setting of the accident situation should include the type of environmental risk, the source of the risk, the unit of danger, the hazardous substance and the way of influence.
8.1.2 Risk accident situation setting principle
8.1.2.1 The same hazardous substance may have multiple types of environmental risks. Risk accident situations should include leakage of hazardous materials, as well as fires,
Associated/secondary pollutant emissions caused by explosions, etc. Risk accidents that affect different environmental factors should be carried out separately
set up.
8.1.2.2 For fires and explosions, dangerous substances that are not completely burned in the accident shall be rapidly released to the atmosphere at high temperature.
And the environmental impact of the associated/secondary pollutants generated during the combustion process is set as the risk accident situation.
8.1.2.3 The probability of occurrence of a set of risk accidents should be in a reasonable range and be compatible with the level of economic and technological development. One
In general, events with a frequency less than 10-6/year are minimal probability events and can be used as the most credible accident in a representative accident situation.
Set reference.
8.1.2.4 Uncertainty and screening of risk accident situation settings. Due to the uncertainty of the trigger of the accident, the accident situation
The setting does not cover all possible environmental risks, but can provide a section for risk management through a representative analysis of the accident situation.
Basis for learning. The setting of the accident situation shall be screened on the basis of environmental risk identification, and the set accident situation shall have hazardous substances,
Representative of environmental hazards and impact pathways.
8.2 Source Item Analysis
8.2.1 Source item analysis method
The source term analysis should be based on the risk accident situation and the source strength should be estimated reasonably. See the recommended method in Appendix E for the leak frequency.
Determined, it can also be determined by accident tree, event tree analysis or analogy.
8.2.2 Determination of the source of the accident
The source of the accident is to provide an analytical simulation for the prediction of the consequences of the accident. Accident source strength can be calculated using calculations and empirical estimates
law. The calculation method is applicable to accidents mainly caused by corrosion or stress, etc.; the empirical estimation method is applicable to fires,
Release of concomitant/secondary pollutants in sudden accidents such as explosions.
8.2.2.1 Calculation of the amount of material leakage
See the recommended method in Appendix F for calculations of liquid, gas, and two-phase flow leak rates.
The leak time should be determined in conjunction with the design principles of the construction project detection and isolation system. In general, the emergency isolation system is set up.
System unit, leakage time can be set to 10 min; unit without emergency isolation system, leakage time can be set to 30
Min.
The evaporation rate of the leaking liquid can be calculated using the method recommended in Appendix F. Evaporation time should be combined with material properties, meteorological conditions
Comprehensive consideration of parts and working conditions, under normal circumstances, can be calculated according to 15~30 min; the area of the liquid pool formed by the leakage material should not exceed
The area inside the cofferdam (or bank) of the leaky unit.
8.2.2.2 Empirical method for estimating the amount of material released
Fire, explosion accidents, volatile substances that are rapidly volatilized at high temperatures and released into the atmosphere, and in the process of combustion
Associated/secondary pollutants produced can be estimated by empirical method using Appendix F.
8.2.2.3 Other estimation methods
a) Loading and unloading accidents, the leakage amount is calculated according to the loading and unloading material flow rate, pipe diameter and out of control time. The runaway time can generally be 5~30 min.
meter.
b) Leakage accident of oil and gas long-distance pipeline, estimate t...
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