HJ 916-2017Environmental Dioxins monitoring technical specification (English PDF)

4.1 Preparation stage

4.1.1 Pre-investigation

Before monitoring, through the consultation, research and field surveys, etc. necessary to collect information for monitoring purposes and monitoring the current status of the surrounding environment, to confirm the sampling site conditions are in line with the requirements of this standard.

4.1.2 Equipment preparation

Prepare related equipment as required to ensure good operation and meet monitoring requirements.

4.1.3 Security

Dioxin monitoring activities should pay attention to personnel safety and avoid accidents.

4.2 Monitoring program

Monitoring programs include project overview, monitoring purposes, monitoring points, monitoring frequency and monitoring time, monitoring staff arrangements, Contact information, sampling methods and analytical methods, quality assurance measures, report preparation requirements.

4.3 Site monitoring

4.3.1 on-site monitoring Surveillance sampling point overview of the surrounding environment, sources of emissions and so on. Detailed record of the site monitoring results.

4.3.2 Field measurement

Actual measurement of meteorological, hydrological, working conditions and other parameters, fill in the sampling record measurement results.

4.3.3 Site sampling

On-site monitoring and on-site measurement is completed, the scene sampling.

4.4 Sample Storage and Transportation

Samples should be sealed dark to save transportation, sample processing and analysis as soon as possible.

4.5 Laboratory Analysis

After the sample is transferred, the laboratory analysis is completed after preparation, extraction, purification, concentration and instrument testing.

4.6 Report preparation

According to the monitoring program, prepare the monitoring report.

5.1 Water and Wastewater

5.1.1 Monitoring point layout

Surface water monitoring section laying principles, setting methods, set the number of reference to HJ/T 91-2002 4.1 and HJ 495-2009 in the relevant requirements of 5.2. For surface water dioxin monitoring, if each monitoring section is upsampled Vertical number of more than 1, each vertical line on the number of sampling points more than 1, respectively, the same cross-section of each vertical and vertical sampling Samples of the instantaneous water samples, according to the proportion of equal volume mixed into a comprehensive water sample.

Groundwater monitoring network layout principles, laying requirements, monitoring points (monitoring wells) to set methods and monitoring wells and construction Management reference HJ/T 164-2004 2.1 ~ 2.3 in the relevant requirements.

Waste water point layout principle and point setting with reference to HJ/T 91-2002 in 5.1, HJ/T 92-2002 5.1 ~ 5.3 and HJ 495-2009 8.1 in the relevant requirements, the sampling of dioxins in wastewater should be located in the workshop or workshop treatment facilities emissions mouth.

5.1.2 Sampling time and sampling frequency

Surface water sampling time and sampling frequency refer to HJ/T 91-2002 in 4.2.1, 4.2.2 and HJ 495-2009 in 10.2;

Groundwater sampling time and sampling frequency refer to HJ/T 164-2004; Wastewater sampling time and sampling frequency refer to HJ/T 91-2002 in 5.2.1, 6.1 ~ 6.2 in HJ/T 92-2002, 10.3 in HJ 495-2009 and 5.3 in GB 3544-2008.

Different water quality types, with the lowest sampling frequency, to obtain the most representative samples.

5.1.3 Sampling method

Surface water sampling method reference HJ/T 91-2002 in 4.2.3 and HJ 494-2009 4.1 ~ 4.3; groundwater sampling method Reference HJ/T 164-2004 3.2 and HJ 494-2009 in 4.5; Wastewater sampling method with reference to HJ/T 92-2002 in 6.3, HJ/T 91-2002 in 5.2.2 and HJ 494-2009 in 4.7.2. Sampling tools and containers should be used for dioxin-free adsorption Materials used, such as stainless steel, PTFE or glass, before use to use methanol or acetone and toluene or dichloromethane sufficient Cleaning. After the water samples collected in the field extraction or back to the laboratory analysis.

For industrial wastewater, if the sewage treatment unit production process is continuous and stable, sewage treatment facilities and normal operation or have a regulatory pool so that wastewater can be discharged steadily, you can adopt instantaneous water samples; if the sewage production process units with intermittent Sex or stage, then the collection of isochronous mixed water samples, mixed samples of sampling times shall not be less than twice. Sample size is not for a single sample Less than 5 L.

5.1.4 Sampling considerations

1) Samples should not be stirred underwater sediment, should pay attention to remove debris on the surface of the water, garbage and other floating objects.

2) Sampling should be used to locate the positioning device to ensure the accuracy of the sampling point.

3) Seriously fill in the water quality sampling records, including the sampling time, location, sample number, sample appearance, sample Variety, water temperature, weather and other parameters.

4) If you need to collect and enrich the water sample in the field, you need to add the sampling internal standard and record the internal standard name and Tim Add amount.

5.2 Ambient air

5.2.1 Sampling instruments and materials

The technical parameters of the sampling instrument refer to 6.1.1 in HJ 77.2-2008.

Ambient air samples collected using quartz fiber membrane and polyurethane foam (PUF) material, the technical parameters and treatment methods see HJ 77.2-2008 5.13 and 5.14.

5.2.2 Ambient Air Quality Monitoring

1) Surrounding monitoring points should be relatively stable, with stable and reliable power supply. Monitoring equipment around the sampling port is not There may be high buildings, trees or other obstructions that impede the flow of ambient air. The surrounding water level should be at least 270 ° Capture space; if the sample port on the side near the building, the surrounding water level should have more than 180 ° of free space.

2) The use of the region's perennial wind direction, meteorological data and regional size, functional categories and other factors to simulate the calculation of pollutant diffusion, Migration and transformation rules, forecast pollution distribution, determine the dioxin monitoring points. The number of monitoring points depends on the monitoring area the size of the area and the change of regional ambient air are reasonably determined. Sample collection flow can refer to HJ 77.2-2008 6.1 and GB 18485, the choice of flow does not exceed 1000 L/min.

3) Each monitoring point should take 7 days for each monitoring sample, and the sampling time per day should not be less than 18 hours. Such as no significant source of dioxin emissions in the monitoring area can reduce the frequency of monitoring, each monitoring point for not less than 3 d. Pre-Tim sample Plus sampling internal standard.

5.2.3 Fixed emission sources surrounding environmental quality monitoring

In principle, the monitoring points are set on the upper and lower wind direction of the dominant and second dominant wind directions. If there are environmentally sensitive areas in the monitoring area, Monitoring points should be added at environmentally sensitive sites. Each monitoring point collection of not less than 3 d. Sampling methods and sampling time reference environment Air quality monitoring (5.2.2) of the relevant requirements.

5.2.4 Road traffic point monitoring

For road traffic points, the general should be on the leveled side of the lane, according to the size of traffic flow, lane on both sides of the terrain, built the distribution of buildings and other locations to determine the location of road traffic points, the sampler from the road edge shall not exceed 20 m. Sampling methods and sampling time, refer to the relevant requirements of ambient air quality monitoring (5.2.2).

5.2.5 Background point monitoring

Background points should be far away from the city built-up areas and major sources of pollution, set in a clean area from the impact of human activities, the background point the altitude should be appropriate. In mountainous areas should be located at a local high, to avoid interference from local air pollutants and near-surface inversion Layer and other local weather conditions; in a gentle area should be maintained in a relatively open high ground to avoid the deposition of air depression.

Sampling methods and sampling time, with reference to the relevant requirements of ambient air quality monitoring (5.2.2).

5.2.6 Sampling records

Including meteorological conditions, environmental conditions, coordinates of monitoring sites, unorganized emissions, emission source altitude, sampling volume, Sampling time, sampling equipment operating conditions and other information, the abnormal occurrence of the sampling period should be specially marked. Sampling records should be Fill the site, record information should be signed to confirm.

5.3 Exhaust gas

5.3.1 Sampling instruments and sampling materials

Use to meet the technical requirements of 6.1.2 HJ 77.2-2008 or HJ/T 365-2007 Appendix B of the exhaust gas Dioxin sampling.

Sampling material technical parameters and treatment methods see HJ 77.2-2008 5.13 and 5.14.

5.3.2 Monitoring platform and sampling hole

Monitoring platform and sampling holes in accordance with GB/T 16157-1996 4.2 sampling location and sampling point set. Monitor flat Taiwan's fence height of not less than 1.1 m, sampling platform area of not less than 4 m2. Sampling hole diameter of not less than 80 mm. When monitoring when the platform is 5 m above the ground, there should be a Z-ladder, a ladder or a lift leading to the monitoring platform.

5.3.3 Monitoring location selection

According to GB/T 16157-1996 4.2 or HJ/T 397-2007 Chapter 5 of the laying of the monitoring location, monitoring Location should give priority to the vertical flue. Sampling conditions can not meet the requirements of GB/T 16157-1996 or HJ/T 397-2007, Sampling location should be selected in the longer straight section of the flue, and the elbow or variable section of the distance not less than 1.5 times the flue equivalent straight Diameter, flue equivalent diameter calculation formula see GB/T 16157-1996 in 4.2.1.

5.3.4 Sampling mode

Dioxin sampling of exhaust gas is preferred to use porous multi-point constant-velocity tracking sampling; on-site sampling conditions can not meet the porous multi-point Constant velocity tracking sampling, you can use single-hole multi-point constant velocity tracking sampling. Flue sampling point within the reference layout GB/T 16157-1996 or HJ/T 397-2007.

Stable conditions of pollution sources, can choose to predict the flow rate sampling. Unable to achieve constant speed sampling, you can use constant current sampling.

In the exhaust gas purification system front-end sampling, the smoke content may be larger, can take to replace the cartridge or additional smoke collection device to ensure continuous sampling.

5.3.5 Adsorption device temperature control

During sampling, the temperature of the PM collection unit should be kept above the dew point of the exhaust gas. If the temperature of the exhaust gas is below the dew point, the particulate matter collection unit should be heated. When the exhaust gas temperature is too high, the exhaust gas entering the sampling system needs to be cooled down.

Exhaust gas in the gas collection unit should be immersed in an ice water bath or cooling cycle device into the gas adsorption column flue gas into Line cooling, gas adsorption column temperature should be maintained below 30 °C. Sampling process gas adsorption column should be protected from light.

5.3.6 Sample quantity and sampling time

According to the construction project completion and acceptance of environmental protection, supervisory monitoring, commissioned monitoring needs to determine the sampling period, weekly not less than 3 samples collected. In order to avoid short-term unstable conditions on the monitoring results have an impact, for continuous operation set Shi, a single sample collection time of not less than 2 h; for intermittent operation of facilities, monitoring process as much as possible to cover different sections, Must include the highest level of theoretical concentration of dioxin emissions, a single sample collection time based on the running time of the section indeed Set, refer to GB 18485.

5.3.7 Operating conditions

During the monitoring, the kiln system should be in normal operation. The production load has a clear requirement for the implementation of the relevant provisions;

If no special requirements, the production load and operating conditions should be consistent with the daily production load.

5.3.8 Monitoring records and sampling records

Monitor and record kiln type, treatment target, production load, fuel load, combustion chamber temperature, exhaust gas treatment facility Process and operation. Special objects need to record the sources of incineration materials, formulation ratio, heating value of ingredients, reuse ratio, chlorine Volume and other information. Monitoring records need to be signed and sealed monitoring confirmed.

Sampling records should include the sampling date, sampling personnel, the basic parameters of the exhaust gas, sampling system sealing test results, mining Sample name and the amount of internal standard, sampling start and end time (accurate to specific minutes), sampling volume, oxygen content, such as carbon monoxide parameter.

5.3.9 Other requirements

Exhaust gas samples must include dioxins adsorbed on particulate matter, dioxins in the gas phase, flue gas condensate, and piping Dioxins in cleaning solution. Each exhaust gas sample to be added to the sampling standard.

5.4 Soil, sediment, solid waste

5.4.1 Monitoring point layout

Refer to HJ/T 166-2004 for layout of soil monitoring sites 5.2. Different types of soil dioxin monitoring sites refer to the relevant provisions of 6.1.4, 6.2.2, 6.3.1 and 6.4 of HJ/T 166-2004 for implementation. For follow-up monitoring, mining the location of the sample should be consistent with the historical monitoring points.

For sampling points of rivers, lakes and reservoirs, refer to HJ/T 91-2002- 4.3.1.1 and HJ 494-2009 4.4 Relevant requirements layout, sampling of marine sediment reference GB 17378.3-2007 in 5.2 related requirements layout. Sediment mining the cross section should be set the same with the section of water quality, and the sediment sampling point and the water quality point should be as much as possible on the same line, if Sediment sampling points have obstacles affect the sampling or inconvenient collection, can be properly offset.

According to the characteristics of solid waste and storage location or container layout sampling points, with specific reference to HJ/T 20-1998 4.2 Regulations.

5.4.2 Sampling frequency and the number of samples

Sampling frequency of soil samples with reference to HJ/T 166-2004 in 4.5. In principle, each monitoring cycle should be However, during the actual monitoring, the sampling frequency may be appropriately increased according to the purpose of the monitoring and special requirements. earth the amount of soil samples collected according to the provisions of HJ/T 166-2004 in 5.3.

Sediment sampling frequency reference GB 17378.3-2007 in 5.3, and water quality sampling simultaneously, but the frequency can be reduced, A sediment sample is collected for each water quality monitoring section or sampling point.

The sampling frequency of solid waste should be determined according to the way of its production, if it is continuously produced, in principle, each monitoring period is collected Once; if produced intermittently, collected once per cycle. The number of samples in accordance with the relevant provisions of HJ/T 20-1998 4.2 carried out.

5.4.3 Sampling method

According to different types of soil, soil samples collected reference HJ/T 166-2004 in 6.1.5,6.2.3,6.3, 6.4 and 6.5, dry weight of each sample is not less than 1 kg. Soil sampling tools can be stainless steel sampling shovels or cutters and wood Sampling shovel.

Sediment sample collection method reference HJ/T 91-2002 in 4.3.1.2 and GB 17378.3-2007 in 5.4, the election with a grab bucket or column dredger, the sample volume is 1 kg ~ 2 kg. Due to the larger water content of sediment samples, the sample flowed Strong, sediment samples should be stored in a brown jacketed jar.

For solid waste sampling methods, refer to 4.2.1 and 4.3 of HJ/T 20-1998 and 4.4 of HJ/T 298. Each sample taken Sample size reference HJ/T 298-2007 in 4.3 to determine.

5.4.4 Sampling records

Soil sampling, should record the sample number, sampling tools, sampling sites, sampling methods, soil characterization, sampling Depth, sampling date and sampling staff.

Sediment sampling, should record the sample number, sampling section, water depth, sediment characteristics, sampling date and sampling Personnel, etc., character traits described in GB 17378.3-2007 in 5.5.

Solid waste sampling, should record the sample number, the name of the solid waste, batch, source, quantity, character, packaging and storage methods, sampling points, sampling methods, sampling dates and sampling staff.

Field records of soils, sediments and solid waste are detailed in Appendix D.

Soil, Sediment and Solid...