Search result: HJ 25.4-2019 (HJ 25.4-2014 Older version)
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Technical guidelines for soil remediation of land for construction
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HJ 25.4-2019
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| HJ 25.4-2014 | English | 519 |
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Technical guidelines for site soil remediation
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HJ 25.4-2014
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| Standard ID | HJ 25.4-2019 (HJ25.4-2019) | | Description (Translated English) | Technical guidelines for soil remediation of land for construction | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z18 | | Classification of International Standard | 13.080 | | Word Count Estimation | 12,189 | | Date of Issue | 2019-12-05 | | Date of Implementation | 2019-12-05 |
ii
Foreword
In accordance with the "Environmental Protection Law of the People's Republic of China" and the "Law of the People's Republic of China on Soil Pollution Control",
Health, protect the ecological environment, strengthen the supervision and management of construction land environment, standardize the preparation of soil remediation plans for construction land, formulate
This standard.
This standard specifies the basic principles, procedures, contents and technical requirements for the preparation of soil remediation plans for construction land.
Appendix A of this standard is an informative appendix.
This standard was first published in.2014, and this is the first revision. The main contents of this revision include.
1. The standard name was revised from "Guidelines for Soil Remediation Technology for Contaminated Sites" to "Guidelines for Soil Remediation Technology for Construction Land";
2. The scope of application shall be modified accordingly with reference to the standard name;
3. Added the normative reference document "Soil Environmental Quality Construction Land Soil Pollution Risk Control Standard" (GB
36600), updated other standards-related content of normative references;
4. Deleted terms and definitions for "site" and "potentially contaminated site";
5. Unifiedly express the "repair technology plan" and "repair plan" as "repair plan", and clarify the repair plan and future
Continue the relationship between engineering design and construction;
6. Modified the contents of “Propose repair target value” and “Select repair mode”;
7. Modify "Repair Engineering Acceptance" to "Repair Effect Evaluation".
This standard and the following standards belong to a series of environmental protection standards for soil pollution risk management and restoration of construction land.
"Technical Guidelines for Investigation of Soil Pollution on Construction Land" (HJ 25.1);
"Technical Guidelines for the Control and Remediation of Soil Pollution Risks on Construction Land" (HJ 25.2);
"Technical Guidelines for Risk Assessment of Soil Pollution on Construction Land" (HJ 25.3);
"Technical Guidelines for Risk Control of Contaminated Land and Evaluation of Soil Remediation Effect" (HJ 25.5);
"Guidelines for Groundwater Remediation and Risk Management and Control of Contaminated Land" (HJ 25.6).
As of the implementation of this standard, the Technical Guidelines for Soil Remediation of Contaminated Sites (HJ 25.4-2014) is abolished.
This standard was formulated by the Department of Soil Ecology and Environment, Laws and Standards Department of the Ministry of Ecology and Environment.
The main drafters of this standard are. Shanghai Academy of Environmental Sciences, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Ecology
Institute of Environmental Standards, Ministry of Environment, Institute of Environmental Protection of Light Industry, Shenyang Institute of Environmental Sciences.
This standard was approved by the Ministry of Ecology and Environment on December 5,.2019.
This standard will be implemented as of December 5,.2019.
This standard is explained by the Ministry of Ecology and Environment.
Guidelines for soil remediation technology for construction land
1 Scope
This standard specifies the basic principles, procedures, contents and technical requirements for the preparation of soil remediation plans for construction land.
This standard applies to the formulation of soil remediation plans for construction land. Technical guidelines for groundwater remediation are published separately.
This standard does not apply to soil remediation of radioactive and pathogenic biological pollution.
2 Normative references
The content of this standard refers to the clauses in the following documents. For undated references, the valid version applies to
This standard.
GB 36600 Soil Environmental Quality Control Standards for Soil Pollution Risk of Construction Land
HJ 25.1 Technical Guidelines for Investigation of Soil Pollution on Construction Land
HJ 25.2 Technical Guidelines for Soil Pollution Risk Management and Remediation Monitoring on Construction Land
HJ 25.3 Technical Guidelines for Risk Assessment of Soil Pollution on Construction Land
HJ 25.5 Technical Guidelines for Risk Management and Contamination Evaluation of Contaminated Land
3 terms and definitions
The following terms and definitions apply to this standard.
3.1
Soil remediation
Use physical, chemical or biological methods to fix, transfer, absorb, degrade or transform
The process of reducing its content to acceptable levels or converting toxic and harmful pollutants into harmless substances.
3.2
Target for remediation
Target pollutants determined by soil pollution surveys and risk assessments do not directly or directly affect human health and ecological receptors.
Potential hazards, or pollution remediation endpoints without environmental risks.
3.3
Feasibility study for remediation
Evaluate and demonstrate alternative repair technologies in terms of technology, conditions, cost-effectiveness, etc.
Feasible and economically viable repair plan.
3.4
Remediation strategy
The general idea of land restoration, including in-situ restoration, off-site restoration, off-site disposal, natural restoration, pollution resistance
Isolation, resident protection, and institutional control, also known as remediation strategies.
4 Basic principles and working procedures
4.1 Basic principles
4.1.1 Scientific principles
Adopt a scientific method to comprehensively consider the land restoration target, the treatment effect of soil restoration technology, restoration time, and restoration
Costs, environmental impacts of remediation projects, etc., formulate remediation plans.
4.1.2 Feasibility principle
The formulated soil remediation plan should be reasonable and feasible. Based on the preliminary work, the pollution nature of the land,
Extent, scope, and harm to human health or ecological environment, reasonably choose soil remediation technology and adapt to local conditions
Establish a repair plan, make the repair target reachable, and the repair project is feasible.
4.1.3 Security Principles
Formulate the soil remediation plan to ensure the safety of the land remediation project and prevent the health of construction workers and surrounding people.
As well as ecological environment harm and secondary pollution.
4.2 Working Procedure
The working procedure for plotting the soil remediation plan is shown in Figure 1.
Start
Put forward the restoration target and confirm the restoration requirements.
Select repair mode
Analysis and comparison of practical repair techniques
Feasibility assessment of remediation technology
Identify repair techniques
Develop a technical route to estimate the amount of restoration work
Develop an environmental management plan
End
select
repair
mode
filter
repair
technology
Make
repair
Program
Determine process parameters
Comparison of repair options
Initial formulation of repair plan
Preparation of a repair plan
Figure 1 Procedure for compiling soil remediation plan
The preparation of plot soil remediation plan is divided into the following three stages.
4.2.1 Select repair mode
Based on the analysis of the previous survey and risk assessment data of contaminated soil pollution,
Pollutants, restoration targets, scope and duration of restoration, choose to determine the general idea of land restoration.
4.2.2 Screening repair technology
According to the specific situation of the plot, according to the determined remediation mode, select practical soil remediation technologies and carry out the necessary practical
Laboratory test and field test, or analysis of soil remediation technology application cases, from the applicable conditions,
Assessment of recovery effects, costs and environmental safety.
4.2.3 Develop a repair plan
According to the determined remediation technology, formulate the soil remediation technology route, determine the process parameters of the soil remediation technology, and estimate the
For the amount of soil remediation, a preliminary remediation plan is proposed. From the main technical indicators, the cost of repair works and the prevention of secondary pollution
The feasibility comparison and selection of the measures and other aspects were carried out to determine economic, practical and feasible remediation plans.
5 Select repair mode
5.1 Confirming site conditions
5.1.1 Verification of relevant information of the plot
Review the previous survey report of soil pollution status completed in accordance with HJ 25.1 and HJ 25.2 and the site completed in accordance with HJ 25.3
Block risk assessment report and other relevant information, verify the completeness and validity of the relevant data of the block, and focus on verifying the previous block information
And whether the data can reflect the current actual situation of the plot.
5.1.2 Site inspection site conditions
Investigate the current status of the site, paying special attention to major changes that occurred during the previous survey and risk assessment of soil pollution
And changes in sensitive environmental protection targets. On-site inspection of the construction conditions of the land restoration project, paying special attention to the site
The power, water, construction roads, and security conditions of the block provide basic information for the layout of the construction area of the repair plan.
5.1.3 Supplement relevant technical data
By checking the existing data of the plot and inspecting the status of the plot, if it is found that it cannot meet the basic information requirements for the preparation of the restoration plan
If necessary, relevant information should be supplemented appropriately. When necessary, supplementary monitoring should be carried out appropriately, and even supplementary soil pollution surveys should be conducted
And risk assessment, relevant technical requirements refer to HJ 25.1, HJ 25.2 and HJ 25.3.
5.2 Propose repair goals
By analyzing the soil pollution status survey and risk assessment data obtained in the previous period, and combining necessary supplementary surveys,
Confirm the target pollutants, target value and scope of soil remediation.
5.2.1 Confirmation of target pollutants
Identify the target soil remediation pollutants from the previous soil pollution survey and risk assessment, and analyze their characteristics with the plot
Relevance of pollutants and compliance with relevant standards.
5.2.2 Propose repair target value
Analyze and compare the soil risk control value calculated according to HJ 25.3, the screening value and control value stipulated in GB 36600, and the plot
The background content of the target pollutants in the soil in the area and the limits specified in relevant national and local standards, combined with the target pollutants
The morphology of dyestuffs, the law of migration and transformation, etc., reasonably put forward the target value of remediation of target soil pollutants.
5.2.3 Confirm the scope of repair
Confirm whether the scope of soil remediation proposed in the previous soil pollution survey and risk assessment is clear, including the surrounding boundaries and
Depth distribution of contaminated soil layer, special attention should be paid to abnormal distribution of contaminated soil layer, such as discontinuity from top to bottom. in accordance with
Remediation target value of soil target pollutants. Analyze and evaluate the amount of soil to be remediation.
5.3 Confirmation of repair requirements
Communicate with the stakeholders of the plot to confirm the requirements for soil remediation, such as the time of remediation and expected funding.
5.4 Select repair mode
According to the characteristic conditions of the plot, the target of restoration and the requirements for restoration, the overall idea for the restoration of the plot is selected and determined. Permanent repair
Recycling takes precedence over disposal, which significantly reduces the amount of pollutants, toxicity, and mobility. Encourage the use of green, sustainable and
Source repair. In principle, the treatment and restoration project should be carried out at the original site. If it is necessary to transfer the contaminated soil, the transporter
Pattern, route and quantity of contaminated soil, whereabouts and final disposal measures.
6 Screening and repair techniques
6.1 Analysis and comparison of practical repair techniques
Combining plot pollution characteristics, soil characteristics, and selected remediation models, from technical maturity, suitable target pollutants, and
Analysis of soil types, remediation effects, time and cost, compared with the advantages and disadvantages of existing soil remediation technologies, focusing on analysis
The practicability of each repair technology engineering application. A list can be used to describe the principles of repair techniques, applicable conditions, and main technical indicators
Comparative analysis of the advantages and disadvantages of the target, economic indicators and technology applications, etc., can also use the method of weight scoring. by
Comparative analysis, put forward one or more alternative repair technologies for further feasibility assessment.
6.2 Feasibility assessment of remediation technology
6.2.1 Lab test
The feasibility assessment of soil remediation technology can be carried out in a laboratory. Laboratory quiz to collect contaminated soil in plots
For testing, a laboratory test plan should be developed for the key links and parameters of the test repair technology.
6.2.2 On-site pilot
If the applicability of soil remediation technology is uncertain, field trials should be carried out on the plot to verify the actual effectiveness of the test remediation technology.
Results, while taking into account project management and secondary pollution prevention. The pilot test should try to take into account different areas and different pollution in the plot.
Dye concentration and different soil types to obtain the parameters required for soil remediation engineering design.
6.2.3 Application Case Analysis
The feasibility assessment of soil remediation technology can also be carried out by using application case analysis of the same or similar land remediation technology.
On-site inspection and evaluation of the actual project of the application case when necessary.
6.3 Identify repair techniques
On the basis of analyzing and comparing the advantages and disadvantages of soil remediation technologies and conducting technical feasibility tests,
Summarize the various alternative repair technologies in terms of conditions, effectiveness, cost, time, and environmental safety
In comparison, select and determine the repair technology for the next stage of formulating a repair plan.
7 Develop a repair plan
7.1 Develop a technical route for soil remediation
According to the determined land remediation model and soil remediation technology, formulate the soil remediation technology route, and a single remediation can be adopted
The technology is formulated, and multiple repair technologies can also be used for optimal combination and integration. The repair technology route should reflect the overall land repair
Ideas and repair methods, repair process and specific steps, should also include contaminated water bodies, air
Decontamination of solid waste and solid waste.
7.2 Determine process parameters of soil remediation technology
The process parameters of soil remediation technology should be obtained through laboratory test and/or field pilot test. Process parameters include, but are not limited to
Dosage or ratio of medicament, equipment influence radius, equipment processing capacity, processing time required, processing conditions, energy consumption, equipment
Footprint or area of work area, etc.
7.3 Estimating the quantity of soil remediation
According to the technical route, according to the determined single repair technology or a combination of repair technology schemes, combining process flow and parameters
Number to estimate the amount of repair work for each repair plan. Depending on the restoration plan, the amount of restoration work may be surveyed and evaluated
The amount of work required for soil treatment and disposal determined at the stage may also be the amount of work involved in the plan.
The amount of decontamination treatment and disposal of polluted water, gas and solid waste during the process.
7.4 Comparison and selection of repair schemes
From the main technical indicators, project cost estimates and secondary
Comparison and selection of pollution prevention measures, etc., finally determine the best remediation plan.
7.4.1 Main technical indicators
Combining plot soil characteristics with restoration goals, from compliance with laws and regulations, long- and short-term effects, restoration time, cost and
In terms of the environmental impact of the restoration project, the rationality of the main technical indicators of different restoration schemes is compared.
7.4.2 Cost of restoration works
Based on the amount of land restoration works, estimate and compare the restoration costs incurred by different restoration schemes, including direct costs and time
Pick up costs. The direct costs mainly include the cost of the main equipment, materials, and engineering implementation of the restoration project, and the indirect costs include restoration
Expenses for project monitoring, project supervision, quality control, health and safety protection, and secondary pollution prevention measures.
7.4.3 Preventive measures against secondary pollution
The implementation of the land remediation project should first analyze the environmental impact of the project implementation, and should be based on the soil remediation process and
Environmental impacts such as waste water, waste gas, solid waste, noise and dust generated during construction equipment cleaning, etc.
Collection, treatment and disposal of technical solutions, and put forward secondary pollution prevention measures. Comprehensive comparison of secondary pollution prevention measures for different remediation schemes
Effectiveness and enforceability.
7.5 Develop an environmental management plan
The environmental management plan of the soil remediation project includes the environmental monitoring plan and environmental emergency safety plan for the remediation project.
7.5.1 Environmental Monitoring Plan for Remediation Engineering
The environmental monitoring plan of the rehabilitation project includes the environmental supervision of the rehabilitation project, the monitoring of the secondary pollution and the assessment of the environment in the restoration effect.
monitor. According to the determined best repair plan, combined with the pollution characteristics of the plot and the environmental conditions of the plot, targeted
Establish an environmental monitoring plan for the restoration project. Relevant technical requirements are implemented in accordance with HJ 25.2 and HJ 25.5.
7.5.2 Environmental emergency safety plan
In order to ensure the safety of the construction workers and surrounding residents during the land remediation process, a comprehensive land remediation project environment should be formulated.
Emergency safety plan, including identification of safety issues, precautions that need to be taken, emergency measures in case of an emergency, necessary
Equipped with safety protection equipment and safety protection training.
8 Prepare a repair plan
8.1 General requirements
The repair plan should fully and accurately reflect all the work content. The text in the report should be concise and accurate
Use charts, tables, and photos to describe key technical information to facilitate the design and construction of subsequent soil restoration projects.
8.2 Main contents
The restoration plan shall be selected in full or in part according to the environmental characteristics of the plot and the characteristics of the plot restoration project.
prepared by.
Appendix A
(Informative appendix)
Compilation outline of plot soil remediation plan
1 General
1.1 Origin of the task
1.2 Preparation basis
1.3 Preparation Content
2 Land problem identification
2.1 Overview of the area
2.2 Basic information of the plot
2.3 Plot environment characteristics
2.4 Land pollution characteristics
2.5 Soil pollution risk
3 Parcel repair mode
3.1 General idea of land restoration
3.2 Scope of land repair
3.3 Land restoration target
4 Screening of repair techniques
4.1 Brief introduction of soil remediation technology
4.2 Feasibility assessment of soil remediation technology
5 Repair plan design
5.1 Repair technical route
5.2 Technical parameters of repair technology
5.3 Estimation of the quantity of restoration works
5.4 Estimation of the cost of restoration works
5.5 Comparison and selection of repair schemes
6 Environmental Management Plan
6.1 Supervision of repair works
6.2 Prevention of secondary pollution
6.3 Evaluation and monitoring of restoration effect
6.4 Environmental emergency plan
7 Cost-benefit analysis
7.1 Repair costs
7.2 Environmental, economic and social benefits
8 Conclusion
8.1 Conclusion of feasibility study
8.2 Questions and suggestions
......
HJ 25.4-2014
Technical guidelines for site soil remediation
People's Republic of China national environmental protection standards
Replacing HJ/T 25-1999
Guidelines for soil remediation of contaminated sites
Posted on.2014-02-19
2014-07-01 implementation
Ministry of Environmental Protection released
Directory
Foreword .1
1 scope of application .2
2 Normative references .2
3 Terms and definitions .2
4 basic principles and working procedures 2
5 Select repair mode 4
6 screening repair technology 4
7 to develop a rehabilitation program 5
8 Preparation of rehabilitation programs 6
Appendix A.7
Foreword
According to "Environmental Protection Law of the People's Republic of China", in order to protect the ecological environment, protect human health and strengthen the contaminated sites
Environmental supervision and management, standardize the preparation of soil remediation technology program contaminated sites, the development of this standard.
This standard and the following standards belong to the same series of environmental protection sites contaminated sites.
Technical Guidelines for Site Environmental Investigation (HJ 25.1-2014)
Site Technical Guidelines for Environmental Monitoring (HJ 25.2-2014)
Technical Guidelines for Risk Assessment of Contaminated Sites (HJ 25.3-2014)
Since the implementation of the above standards, the "Industrial Enterprise Soil Environmental Quality Risk Assessment Benchmark" (HJ/T 25-1999) waste
only.
This standard specifies the basic principles, procedures, contents and technical requirements for the preparation of soil remediation program for contaminated sites.
This standard is formulated by the Ministry of Environmental Protection Science and Technology Standards Division.
This standard is mainly drafted by. Shanghai Institute of Environmental Sciences, Nanjing Environmental Science Institute of Environmental Protection, Environment
Ministry of Environmental Protection Institute of Environmental Protection, Light Industry Environmental Protection Institute, Shenyang Institute of Environmental Sciences.
This standard MEP approved on February 19,.2014.
This standard since July 1,.2014 implementation.
This standard is interpreted by the MEP.
Guidelines for soil remediation of contaminated sites
1 scope of application
This standard specifies the basic principles, procedures, contents and technical requirements for the preparation of soil remediation program for contaminated sites.
This standard applies to the development of soil remediation program of contaminated sites. Technical guidelines for groundwater rehabilitation will be announced separately.
This standard does not apply to radioactive contamination and pathogenic biological contaminated sites soil remediation.
2 Normative references
This standard references the following documents in the terms. For undated references, the effective version applies
This standard.
HJ 25.1 Site Environmental Investigation Technical Guidelines
HJ 25.2 Technical Guidelines for Site Environmental Monitoring
HJ 25.3 Technical Guidelines for Risk Assessment of Contaminated Sites
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1 site site
Soil, groundwater, surface water and the sum of all structures, facilities and living things within a parcel within the parcel.
3.2 contaminated sites contaminated site
After investigation and risk assessment of potential contaminated sites, it is acceptable to confirm that the pollution hazard exceeds human health or ecological environment
Risk level of the site, also known as contaminated land.
3.3 Soil remediation soil remediation
Use of physical, chemical or biological methods to fix, transfer, absorb, degrade or convert contaminants in the soil of the site to
Its content is reduced to an acceptable level, or toxic and hazardous pollutants into harmless substances process.
3.4 site repair goal site remediation goal
The target pollutants identified by site environmental surveys and risk assessments do not have a direct or potential impact on human health and ecological receptors
Hazard, or end of pollution remediation without environmental risk.
3.5 Fix Feasibility Study feasibility study for remediation
From the technical, conditions, cost-effectiveness and other aspects of alternative repair techniques to assess and demonstrate that the technology can be
Line, the economic feasibility of rehabilitation programs.
3.6 repair mode remediation strategy
The general idea of remediation of contaminated sites includes in situ remediation, offsite remediation, offsite disposal, natural remediation,
Dye barrier, residential protection and system control, also known as repair strategy.
4 basic principles and working procedures
4.1 The basic principle
4.1.1 Scientific Principles
The use of scientific methods, taking into account the remediation of contaminated sites, the effectiveness of soil remediation techniques, repair time,
Repair costs, environmental remediation works and other factors, the development of rehabilitation programs.
4.1.2 Feasibility Principle
Developed contaminated site soil remediation program to be reasonable and feasible, based on the previous work, for the contaminated sites of pollution
Dyeing nature, extent, scope and harm to human health or ecological environment, reasonable choice of soil remediation technology, due to
The system should be developed to repair programs, remediation goals up to repair works feasible.
4.1.3 safety principles
To develop plans for remediation of contaminated sites so as to ensure the safety of the remediation works of contaminated sites and prevent the construction workers from surrounding areas
Population health and ecological hazards and secondary pollution.
4.2 working procedures
Contaminated site soil remediation program preparation work program shown in Figure 1.
Contaminated site soil remediation program is divided into the following three stages.
4.2.1 Select the repair mode
Based on the analysis of the environmental survey and risk assessment data of the contaminated sites in the early stage, according to the characteristics and conditions of the contaminated sites, the target
Pollutants, repair objectives, repair range and repair time, choose to determine the general idea of remediation of contaminated sites.
4.2.2 screening repair techniques
According to the specific conditions of the contaminated site, according to the determined repair mode, screening of practical soil remediation technology, to carry out the necessary
Of the laboratory test and on-site pilot or soil repair technology application case analysis, from the applicable conditions of the field soil
Soil repair effect, cost and environmental safety assessment.
select
repair
mode
Make
repair
Program
End
Analysis and more practical repair techniques
Repair Technical Feasibility Assessment
Determine the repair technique
Determine the technical parameters of the development of technical routes to estimate the amount of repair projects
Comparison of repair options
Start
Formulate an environmental management plan
Initial development of rehabilitation programs
Preparation of rehabilitation programs
Confirm the repair request
filter
repair
technology
Choose repair mode
Figure 1 Contaminated site soil remediation program preparation procedures
Put forward the repair target to confirm the site conditions
4.2.3 Develop a rehabilitation program
According to the established restoration technology, formulate the soil remediation technology route, determine the technical parameters of soil remediation technology, estimate the pollution
Dyeing site soil repair works, put forward a preliminary repair program. From the main technical indicators, repair costs and secondary pollution
Dye control measures and other aspects of the feasibility of the program to determine the economic, practical and feasible rehabilitation programs.
5 Select the repair mode
5.1 confirm the site conditions
5.1.1 Verify site related information
Review the Site Environmental Investigation Report in Accordance with HJ 25.1 and HJ 25.2 Earlier and the Contamination Site Performed in HJ 25.3
Risk assessment report and other relevant information to verify the integrity of the site-related information and effectiveness, focusing on verifying pre-site information
And whether the information can reflect the actual situation of the venue.
5.1.2 site inspection site conditions
Examine the present situation of the site, pay special attention to the significant changes that have taken place during the previous site environment investigation and risk assessment,
As well as changes in sensitive targets surrounding environmental protection. Site inspection site construction conditions, with special attention to the venue
Electricity, water, construction roads, security and other conditions, to provide basic information for the layout of the construction area of the rehabilitation program.
5.1.3 add relevant technical information
By checking the site has the information and on-site inspection of the site conditions, such as found that the existing data can not meet the restoration program
Information requirements, should be appropriate to add relevant information. Where necessary, supplementary monitoring should be conducted as appropriate and even complementary site environments should be established
Investigation and risk assessment, the relevant technical requirements refer to HJ 25.1, HJ 25.2 and HJ 25.3.
5.2 propose restoration goals
Through the pre-access site environment survey and risk assessment data analysis, combined with the necessary supplementary investigation, confirmed
Contaminated site soil remediation target pollutants, repair target value and repair range.
5.2.1 confirm the target pollutants
Confirm the pre-site environmental survey and risk assessment proposed soil remediation target contaminants, analysis of the site with the characteristics of pollution
Material relevance and compliance with relevant standards.
5.2.2 propose repair target value
Analyze and compare the soil risk control values calculated according to HJ 25.3 with the background of target pollutants in the soil in the site area
Content and the relevant national standards set forth in the limit, a reasonable target soil remediation target pollutants.
5.2.3 confirm the scope of repair
Confirm the scope of soil remediation proposed by previous site environmental survey and risk assessment is clear, including the surrounding borders and pollution
Soil depth distribution, with particular attention to the abnormal distribution of contaminated soil, such as discontinuities from top to bottom distribution. Depending on the soil
Target remediation of target contaminants, analysis and assessment of the amount of soil needed to be rehabilitated.
5.3 confirm the repair requirements
Communicate with the stakeholders in the site to confirm the requirements for soil remediation, such as repair time and expected funding.
5.4 Select the repair mode
According to the contaminated site characteristics and conditions, repair objectives and repair requirements, choose to determine the general idea of remediation of contaminated sites. permanent
Sexual remediation takes precedence over disposal, ie significantly reducing the amount of contaminants, toxicity and migration. Encourage the use of green, sustainable
Continued and resourced restoration.
6 screening repair techniques
6.1 Analysis and more practical repair techniques
Combined with the pollution characteristics of contaminated sites, soil characteristics and the choice of repair mode, from the technical maturity, the appropriate target pollution
And soil types, the effectiveness of the restoration, time and cost analysis and comparison of existing advantages and disadvantages of soil remediation technology, the focus of
Analyze the practicability of each repair technology engineering application. You can use the list to describe the principle of repair technology, applicable conditions, the main technology
Indicators, economic indicators and the advantages and disadvantages of technical applications and other aspects of comparative analysis, you can also use the method of weighting. through
After comparative analysis, put forward one or more alternative repair techniques for the next feasibility assessment.
6.2 Repair Technical Feasibility Assessment
6.2.1 laboratory test
Feasibility assessment of soil remediation techniques can be performed using laboratory bench tests. Laboratory test should be collected contaminated sites of pollution
Dyeing soil test, test repair technology for the key aspects and key parameters, the development of laboratory test program.
6.2.2 Field Pilot
If the applicability of soil remediation technology is uncertain, a pilot site test should be carried out in the contaminated site to verify the actuality of the test remediation technology
International effects, taking into account project management and secondary pollution prevention. Pilot test should try to take into account the different areas of the venue, no
With the same pollution concentration and different soil types, the parameters needed for soil remediation engineering are obtained.
6.2.3 application case analysis
Feasibility assessment of soil remediation technology can also be applied to the same or similar contaminated site repair technology application case analysis
Line, if necessary, site visits and assessment of practical cases of practical projects.
6.3 Determine the repair technique
On the basis of analyzing the advantages and disadvantages of soil remediation technology and carrying out technical feasibility test, from the technical maturity, suitable
With the conditions of the contaminated site soil remediation effect, cost, time and environmental safety aspects of the various options of repair technology
Comprehensive comparison of the line, choose to determine the repair technology, to carry out the next stage of the development of rehabilitation programs.
7 Develop a rehabilitation program
7.1 Develop soil remediation technology route
According to the determined site restoration mode and soil remediation technology, the development of soil remediation technology route, you can use a repair
Technology development, you can also use a variety of repair techniques for optimal combination of integration. Repair technology route should reflect the contaminated site repair
General ideas and methods of repair, repair process and concrete steps, but also include the contaminated water in the process of site soil remediation
Body, gas and solid waste disposal harmless treatment.
7.2 Determination of soil repair technology process parameters
Soil repair technology process parameters should be through the laboratory test and/or field pilot obtained. Process parameters include but are not limited to
Repair material dosage or proportion, equipment impact radius, equipment processing capacity, processing time, processing conditions, energy consumption,
Equipment footprint or area of work area.
7.3 Estimate the amount of soil remediation works on the contaminated site
According to the technical route, in accordance with the established single repair technology or repair technology combination of programs, combined with the process and reference
Estimate the number of repairs for each repair scenario. Depending on the repair plan, the amount of repair work may be investigated and evaluated
The amount of work required to process and dispose of soils at the stage may also be the amount of work involved in the program. Consideration should also be given to soil remediation
Process in the contaminated water, gas and solid waste disposal harmless treatment of the project volume.
7.4 repair program comparison
From the identified single repair technology and a variety of repair technology portfolio of the main technical indicators, project cost estimates and secondary
Pollution control measures and other aspects of comparison, and finally determine the best repair program.
7.4.1 The main technical indicators
Combined with the site soil characteristics and restoration goals, from the compliance with laws and regulations, long-term and short-term effects, repair time, cost and
Repair the environmental impact of the project, etc., to compare the reasonableness of the main technical indicators of different rehabilitation programs.
7.4.2 repair project costs
Based on the volume of site restoration works, estimate and compare the remediation costs incurred by different remediation programs, including direct costs and charges
Take the fee The direct costs mainly include the cost of repairing the main equipment, materials and engineering implementation of the project. The indirect costs include repairing
Project monitoring, project supervision, quality control, health and safety protection and secondary pollution prevention measures.
7.4.3 secondary pollution prevention measures
The implementation of the project of remediation of contaminated sites should first analyze the environmental impact of the project implementation and should be based on the soil remediation process
Process and construction equipment cleaning and other links generated by waste water, waste gas, solid waste, noise and dust and other environmental impacts, to develop relevant
Collection, treatment and disposal of technical programs, proposed secondary pollution prevention measures. Comprehensive comparison of different repair programs secondary pollution prevention
Effectiveness and enforceability of measures.
7.5 Develop an environmental management plan
The contaminated site soil remediation project environmental management plan includes the remediation project environmental monitoring plan and the environmental emergency safety plan.
7.5.1 repair project environmental monitoring plan
Rehabilitation project environmental monitoring plan includes remediation project environmental supervision, secondary pollution monitoring and repair project acceptance of the environment
monitor. Should be based on the best repair programs identified, combined with the site pollution characteristics and the site where the environmental conditions, targeted system
Set repair project environmental monitoring plan. The relevant technical requirements in accordance with HJ 25.2 implementation.
7.5.2 Environmental Emergency Safety Plan
In order to ensure the safety of construction workers and surrounding residents in the process of site restoration, well-circumscribed site restoration engineering environment should be established
Urgent safety plan, including the identification of safety issues, precautions to be taken, emergency measures in case of an emergency, must
Equipped with safety equipment and safety training.
8 Preparation of rehabilitation programs
8.1 General requirements
Repair programs to fully and accurately reflect the entire work content. The text in the report should be concise and accurate and should be used as much as possible
Describe a variety of key technical information in the form of charts, tables and photos to facilitate the construction party to develop a site for soil remediation of contaminated sites
Work plan.
8.2 main content
The rehabilitation plan should be based on the environmental characteristics of contaminated sites and contaminated sites to repair the characteristics of the project to choose Appendix A All or part of
Content preparation.
Appendix A.
Contaminated site soil remediation program compilation outline
1 general
1.1 mission origin
1.2 based on the preparation
1.3 preparation of content
2 site identification problem
2.1 Overview of the region
2.2 site basic information
2.3 site environment characteristics
2.4 site pollution characteristics
2.5 Soil contamination risk
3 site repair mode
3.1 site repair general idea
3.2 site repair range
3.3 site repair goals
4 repair technology screening
4.1 soil remediation technology brief
4.2 Soil remediation technology feasibility assessment
5 repair program design
5.1 repair technology route
5.2 repair technical process parameters
5.3 repair project estimate
5.4 repair project cost estimates
5.5 repair program comparison
6 Environmental Management Plan
6.1 repair project supervision
6.2 secondary pollution prevention
6.3 Project Acceptance Monitoring
6.4 Environmental Emergency Plan
7 repair engineering design
8 cost-benefit analysis
8.1 repair costs
8.2 Environmental benefits, economic benefits, social benefits
9 Conclusion
9.1 Feasibility Study Conclusions
9.2 Questions and Suggestions
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