One: Two standard data
18883 data
Parameter category parameter unit standard numerical remarks
In summer, the temperature is 22 ~ 28 degrees Celsius.
16 ~ 24 winter
Summer humidity% 40 ~ 80
30 ~ 60 winter
Summer wind speed m/s 0.30
0.20 winter
The fresh air volume is m3/h, with 30.0 people.
Chemical sulfur dioxide mg/m3 0.50
Nitrogen dioxide mg/m3 0.24
Carbon monoxide mg/m3 10
Carbon dioxide% 0. 10
Ammonia mg/m3 0.20
Ozone mg/m3 0. 16
Formaldehyde mg/m3 0. 10
Benzene mg/m3 0. 1 1
Toluene mg/m3 0.20
Xylene mg/m3 0.20
Benzopyrene mg/m3 1.0
Inhalable particulate matter PM 10/0mg/m3 0. 15
TVOC mg/m3 0.60
Total number of biological bacteria cfu/m3 2500
Radioactive radon Bq/m3 400
Standard of 50325
First-class civil construction engineering and second-class civil construction engineering
Radon Bq/m3 ≤200 ≤400
Free formaldehyde mg/m3 ≤0.08 ≤0. 12
Benzene mg/m3 ≤0.09 ≤0.09
Ammonia mg/m3 ≤0.20 ≤0.20
TVOC mg/m3 ≤0.5 ≤0.6
A class of civil construction projects: residential buildings, hospitals, old buildings, kindergartens, school classrooms and other civil construction projects.
Class II civil construction projects: office buildings, shops, hotels, cultural and entertainment venues, bookstores, libraries, gymnasiums, public transport waiting rooms, barbershops and other civil construction projects.
Second, the difference between the two standards:
In-depth analysis of the differences between 18883 standard and 50325 standard on indoor air quality and indoor environmental pollutants detection-different publishing institutions, different objects, different detection conditions and different motives. What about ordinary people?
The main differences are:
1. Different license issuing agencies, different objects, different testing conditions and different motives.
18883 promulgated by the Ministry of Health and 50325 promulgated by the Ministry of Construction.
18883 is the minimum standard for human settlements, and 50325 is the standard for controlling environmental pollutants in construction projects.
18883 standard involves 19 indicators, while 50325 specification only involves 5 indicators.
18883 requires the doors and windows to be closed before inspection 12 hours, in order to make the inspection conditions as close as possible to the daily living conditions, that is, residents can generally guarantee the opportunity to open the window twice for ventilation. The test conditions of 50325 (formaldehyde, benzene, ammonia, TVOC) are carried out after the doors and windows are closed 1 hour. Obviously, the standard of 50325 is more concerned with making it easier for builders and decorators to pass the customs, as long as the indoor environmental pollution problem is not too outrageous. Compared with the test results of 12 hour and 1 hour in real houses, the results are often poor.
2. Obviously, 18883 and 50325 have great differences. 18883 cares about people's health, and 50325 cares more about the interests of builders and decorators. Indoor air quality testing according to 18883 standard is the fundamental standard to measure whether the house is environmentally friendly. There are 46 50325 testing units certified by Beijing Bureau of Quality and Technical Supervision, and only 18883 has passed. The objective fact of 46: 12 is undoubtedly a background factor for a lot of information that confuses and misleads the meaning and function of 18883 and 50325.
3. The effect is different. 18883 does not bind builders and decorators, but actually binds or warns the people. On the other hand, although 50325 requires builders and decorators to meet the standards before handing over the project, there are two ways for the "two vendors" to make the project pass smoothly: 1, bribing the "authoritative inspection" unit to do waterproofing; 2. Spray "deodorant" and "scavenger" which are effective in the short term, ineffective or even harmful in the long term before testing.
What about ordinary people?
Despite staring at the decoration materials and new furniture, the decoration companies and furniture sellers have vowed to ensure that the decoration and furniture are "absolutely environmentally friendly". However, in a hurry to move in, I still feel that the new house has a strange smell, and I feel uncomfortable when I stay-is the hateful decoration pollution, furniture pollution and formaldehyde, benzene, ammonia and TVOC pollution coming to the lovely new house? What to do and how to maintain self-confidence, we have the following football strategy:
1. Regarding the environmental acceptance of decoration, the new version of Beijing Standard Contract for Home Decoration has clearly stipulated that the interior decoration project can only be completed after environmental acceptance, otherwise the decoration company must rework and compensate. The problem is that there are three major difficulties in the implementation of this provision. First, when entrusting the decoration company, it was negligent and did not adopt the text of "standard contract", which made the decoration company escape the environmental protection acceptance; Secondly, in the process of decoration, the materials of the first phase are intertwined, and the responsibility for decoration is not clear. Even if it is clear, a few days before the environmental acceptance test, the decoration company also sprayed "sweeper" and "deodorant", which was a short-term cover-up, ineffective for a long time, and even added harm. Third, it is difficult to detect, and the "free detection" sent by the decoration company is obviously not a fair game; True and false "authoritative testing" is exorbitant, and the testing fee is "not negotiable"; Selling air purification equipment or selling indoor pollution control products or services for "free testing" is a trick of "cheating you to discuss" and even more unreliable.
Second, neutral, honest and affordable indoor environment testing service is essential. The question is where to find such a testing service? -Search "Looking for Different indoor testing" on Baidu to find it (don't "promote", just "snapshot").
Third, check the price problem. Three rooms, four pollutants of formaldehyde, benzene, ammonia and TVOC, and a sample of *** 12, 229 yuan, which is fair enough.
Fourth, is the parity check accurate? Let's talk about the high-priced "authoritative test", which is actually very inaccurate. Why do you see it? Look at the news that "the qualification of authoritative indoor air testing institutions in Beijing is less than half"-According to the Notice on the Comparison Results of Indoor Air Quality Testing Institutions (Social Laboratories) in Beijing in 2004 issued by Beijing Bureau of Quality and Technical Supervision on June 65438+1October 0, 2005, 12. Results Four laboratories were qualified, three were unqualified, and the unqualified rate was 43%. In this regard, the "handling opinion" of Beijing Bureau of Quality and Technical Supervision is 1, and the laboratories with satisfactory results are commended here, hoping to keep them in the future; 2. The unqualified 1 laboratory shall be rectified within 1 month, and after the rectification work is completed, an application for reexamination shall be submitted to the Beijing Municipal Bureau of Quality and Technical Supervision; During the rectification period, unqualified items shall not be detected; 3. Laboratories that fail to complete rectification within the time limit will be disqualified from project testing; After the laboratory confirmation of rectification is completed, the rectification project can be inspected. (See the website of Beijing Bureau of Quality and Technical Supervision for the original text). Why is "authority" planted? I'm afraid I only focus on "making a lot of money regardless of money", ignoring technology and business, and it's useless for advanced and expensive instruments and equipment (it's unknown to spend a lot of money on second-hand goods). On the other hand, there is nothing mysterious about indoor testing. Chemical indicators, chemical analysis and spectral analysis are all traditional technologies for hundreds of years, that is, it is not difficult to master or use them at a cost of several hundred gross. So accuracy is not a question of whether it is expensive or not. Expensive doesn't mean accurate, flat doesn't mean inaccurate. Whether it is accurate or not depends on whether the heart is right, not whether it is expensive or not. It is absolutely not allowed to find a wrong "authoritative test", or a "free test" with ulterior motives, or a pseudo-authoritative test that steals the concepts of "CMA" certification and "authoritative test", but it is credible to find a right "parity test".
V. How to choose two types and two standards 18883※50325? Four types of testing institutions and expenses
There are two indoor tests:
1. Indoor air quality testing measures whether a house meets the sanitary requirements of the living environment, according to GB/T 18883-2002 indoor air quality standard.
2. Indoor environmental pollutants detection The environmental acceptance test of civil construction projects and indoor decoration projects is based on the standard GB50325-200 1 Code for Environmental Pollutant Control of Civil Construction Projects.
The main differences between indoor test according to standard 18883 and indoor test according to standard 50325 are as follows:
1, with poor pertinence 18883 is a sanitary standard for human settlements, which is not binding on builders, decorators and furniture manufacturers, while 50325 is an acceptance standard for building decoration, which is mandatory for builders and decorators. The standard stipulates that construction projects and decoration projects must meet the environmental protection acceptance standards before they can be completed, and it is strictly forbidden to deliver unqualified houses.
2. Difference of index values 18883 standard involves indoor environmental physics, chemistry, biology and radioactivity *** 19 index, while 50325 standard only limits five items such as formaldehyde, benzene, ammonia, TVOC (total volatile organic compounds) and radon 222. The limit values of items in the overlapping standards are 0.10.08, 0.1.09, 0.20/0.20, 0.60/0.50 and 200 respectively.
3. Different detection conditions Although the index value standard 50325 is higher than the standard 18883, in fact, when it comes to detection conditions, 50325 is more relaxed than 18883. The former requires adequate ventilation before testing, and then the doors and windows are closed 1 hour before testing, while the latter requires closing doors and windows 12 hours. Different testing conditions often lead to the contradiction that the houses delivered for use after acceptance according to the 50325 standard are unqualified after inspection according to the 18883 standard, and all kinds of disputes caused by it are finally reported that the owners lost the case, which is not uncommon.
For homeowners, when do you choose the 50325 test?
1. If you have serious doubts about building environmental protection standards before closing the house, you need to ask for re-inspection. Don't close the house until the doubts are cleared. It is even harder to pursue it after the house is closed.
2. Before the decoration acceptance, according to the new version of renovation contract in 2004, the decorator must carry out environmental protection acceptance according to 50325 before the project is completed. Environmental protection acceptance of decoration should be carried out before the decorator leaves. If the environmental protection acceptance is unqualified, it will not be accepted, and it will be too late to find the problem after acceptance. Environmental protection acceptance must be carried out by a third-party testing unit entrusted by the owner that has nothing to do with the decorator and is unknown in advance to protect the owner's rights and interests.
Under what circumstances should the house owner choose 18883 for testing:
1. Diagnose the indoor air quality before moving into the new house to ensure the health of the living environment.
2. "Free testing" means "the problem is very serious". Promote therapeutic products to verify indoor air quality problems and avoid money and mental losses.
3. Acceptance of indoor pollution control project If the management company is entrusted to do indoor pollution control in advance, it is necessary to find a third party for inspection and acceptance.
4. Investigate the indoor air quality problems and check the houses in question.
Ordinary homeowners need to do four tests: formaldehyde, benzene, ammonia and TVOC (total volatile organic compounds). Radon 222 should also be considered in the underground, semi-underground and first floor of high-rise buildings.
For more information, you can go to Baidu or Google, Yahoo, sogou and other major search engines to search for "looking for different indoor tests" and see a snapshot of the search results. Or log in directly:/
References:
Www. 18883.cn to find different indoor air quality tests.