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HJ 25.4-2014

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HJ 25.4-2014English339 Add to Cart Days<=3 Technical guidelines for site soil remediation Valid HJ 25.4-2014
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Detail Information of HJ 25.4-2014; HJ25.4-2014
Description (Translated English): Environmental Protection
Sector / Industry: Environmental Protection Industry Standard
Classification of Chinese Standard: Z05
Word Count Estimation: 12,177
Date of Issue: 2/19/2014
Date of Implementation: 7/1/2014
Older Standard (superseded by this standard): HJ/T 25-1999
Quoted Standard: HJ 25.1; HJ 25.2; HJ 25.3
Drafting Organization: Shenyang Institute of Environmental Sciences; Shanghai Academy of Environmental Sciences; Ministry of Environmental Protection, Nanjing Institute of Environmental Sciences; Standards Institute for Environmental; Environmental Protection Research Institute
Administrative Organization: Ministry of Environmental Protection
Regulation (derived from): Ministry of Environmental Protection Notice No. 14 of 2014
Issuing agency(ies): Ministry of Environmental Protection
Summary: This standard specifies the basic principles of contaminated site soil remediation technology programming, procedures, and technical requirements. This standard applies to the development of contaminated site soil remediation program. Groundwater remediat

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
Related standard:   HJ 25.5-2018  HJ 25.1-2014
   
 
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