Method and device for extracting a soil gas, in particular radon or a gas mixture containing radon, from a building

Abstract

Method and device for planning and / or designing an extraction system for a soil gas (2) on a building (3) comprising the following method steps: - determining (100) at least one examination location (4, 6, 8) of a building (3) with a floor area (13) assigned to this examination location (4, 6, 8); - Providing (110) at least one application device (11, 11') which dispenses an indicator gas (10, 10') at the examination site (4, 6, 8); - determining (120) at least one destination (5, 7, 9) of the building (3) with a floor area (13) assigned to the destination (5, 7, 9); - providing (130) at least one detection device (12, 12') at the destination (5, 7, 9), - carrying out (140) an examination (150) determining at least one property of a soil structure of the soil region (13) between the at least one examination location (4, 6, 8) and the at least one target location (5, 7, 9) and generating (165) examination information (155), wherein the examination (150) comprises dispensing (160) an indicator gas (10, 10') to at least one examination location (4, 6, 8) and detecting (170) the presence and / or the proportion and / or the amount of at least one substance component of the indicator gas (10, 10') at at least one target location (5, 7, 9) by means of the detection device (12, 12'), and - Planning and / or designing (180) an extraction (200) of soil gas (2) depending on the examination information (155).

Description

[0001] The invention relates to a method and a device for planning and / or designing an extraction system for a soil gas, in particular radon or a gas mixture containing radon.

[0002] Methods for extracting soil gas from a building are generally known from the prior art. Buildings located on a subsurface where soil gas is vented can be equipped with a natural gas extraction device during remediation measures. This device extracts the soil gas escaping from the subsurface and releases it into the environment at a location outside the building. Alternatively, it is known to generate overpressure at least in certain sections of the building using a pressure relief device, thereby preventing the entry of soil gas into the building.

[0003] Soil gas typically enters the building through shrinkage cracks in a concrete basement or concrete floor slab, or through maintenance openings. Extraction devices of an extraction system or an extraction structure must be installed at these potential entry points for soil gas and / or at deliberately created connecting openings between the building and the subsoil to extract the soil gas during the remediation work.

[0004] It is known to use a "pressure field extension test" (or communication test) to determine the number of extraction points and the size of the fans required for an effective system. For this purpose, a suction device is used which creates a suction field beneath the floor slab at a proposed suction point. The extent and size of the suction field are measured using a micro-manometer. The micro-manometer records a pressure value at test holes located at different points on a floor slab or at different points at the transition from the building to the floor area or to the subsurface. The test holes are at different distances from the suction point. A throttle and / or a bypass can be arranged or designed in the connections between the suction device and the test holes in order to set a suction power specific to the suction lock.

[0005] US 9 157 651 B2 describes a vapor abatement system comprising at least one vacuum pipe configured to capture vapors beneath a floor of a building, and a fan connected to the at least one vacuum pipe. The fan is configured to create a vacuum beneath the floor of the building. The vapor abatement system includes a controller configured to regulate the speed of the fan.

[0006] US 2005 / 0 191 956 A1 describes a radon mitigation device using natural convection to remove radon-contaminated air from beneath the slab foundation of a structure, building or dwelling.

[0007] US 4,938,124 A teaches a network of pipes arranged beneath the foundation of a house, with a vent pipe extending from the network's pipes to above the house. A negative pressure is created in the network, so that all gases beneath the house are drawn into the pipes and released into the atmosphere.

[0008] The invention is based on the object of specifying a method and a device for planning and / or designing an extraction of soil gas, which in particular enables precise and simple planning and / or design, in particular optimization, adjustment and / or execution of an extraction of soil gas and allows this with low energy consumption.

[0009] The object is achieved by a method for planning and / or designing a soil gas extraction system according to claim 1. The dependent claims relate to possible embodiments of the method. Furthermore, the object is achieved by a device for planning and / or designing a soil gas extraction system according to claim 16. The object is also achieved by a method for extracting a soil gas according to claim 15 and by a device for extracting a soil gas according to claim 17.

[0010] The invention relates to a method for planning and / or designing an extraction system for soil gas, in particular radon or a gas mixture containing radon, from a building. The soil gas escapes from a subsurface or ground area located beneath the house or laterally adjacent to the house and penetrates into the house. For example, the soil gas entering the house from the subsurface is sucked in by a negative pressure inside the house and / or introduced into the interior of the house by means of an overpressure prevailing in the subsurface. In order to prevent the "uncontrolled" entry of soil gas into the interior of the house, the soil gas is extracted from the ground area or subsurface as part of a remediation measure in the course of an extraction system, in particular a permanent one, and is then specifically released, in particular blown out, to a location outside the house.

[0011] In a preceding step, at least one examination location of a building is determined, wherein an opening is provided, in particular created, at the examination location, which connects a building space of the examination location with a floor area assigned to this examination location. The opening is created before, after, or at the same time as determining or defining the respective examination location. The floor area assigned to the building space can be adjacent to the building space, in particular directly. This means, for example, that a wall delimiting the building space delimits the building space directly or immediately opposite the floor area. The building space can, for example, be a room that is at least partially in contact with the ground, e.g. a ground floor room without a basement. Through the opening, e.g. a core drilling, the building space is connected to the floor area, for example by a side wall and / or a floor wall (e.g.through a floor slab). Typically, a plurality of test sites and openings, e.g., more than three, preferably more than four, particularly preferably more than five, are defined or created, particularly in different building rooms.

[0012] In a further method step, an application device is provided that delivers an indicator gas to the at least one aperture of the at least one examination site. Furthermore, at least one target location is determined, wherein the at least one target location comprises an aperture that connects a building space of the target location with a floor area associated with the target location, preferably adjacent, particularly preferably directly adjacent. A target location is to be understood as a location that could be considered as a possible location for extraction, in particular subfloor extraction, so that this location can be used, in particular is used, as an extraction location, provided the floor area surrounding the target location has sufficient gas permeability to the floor areas of the at least one examination site. The aperture of the at least one target location is determined before, during, or after the at least one target location is determined.

[0013] In a further step, a detection device is provided at the at least one target location, wherein the detection device is configured to detect a presence and / or a proportion and / or a quantity of at least one substance component of the indicator gas at the at least one target location. For this purpose, the detection device can be arranged at the at least one target location and / or be in fluid communication with the at least one target location. In order to carry out a targeted optimization of the extraction, an examination is carried out which determines at least one property (parameter) of a soil structure at least between the at least one examination location and the at least one target location, and examination information is generated. The examination (a) comprises emitting an indicator gas from the application device to, in particular in or onto, at least one examination location ora breakthrough of an investigation site and (b) detecting the presence and / or proportion and / or quantity of at least one constituent of the indicator gas at at least one target location. The investigation information can describe a property of a soil structure of the soil region, e.g., its porosity or fluid permeability.

[0014] Detecting the presence can result in information indicating that the indicator gas is present or that no indicator gas is present. Alternatively or additionally, the proportion of the indicator gas in relation to the total gas detected by the detection device can be specified. For example, the absolute amount (volume and / or weight) of the indicator gas detected by the detection device can also be detected and output. In other words, by detecting the indicator gas, a conclusion can be drawn as to whether a fluid connection exists in the soil region between the at least one examination location and the at least one target location. Furthermore, at least one property of a fluid connection, e.g., the porosity or permeability, in the soil region between the at least one examination location and the at least one target location can be determined and output as examination information.

[0015] Finally, soil gas extraction is planned and / or designed based on the examination information. For example, depending on the examination information, soil gas extraction is performed at a breakthrough associated with at least one target location and / or at least one examination site and / or its extent is adjusted, in particular on a site-specific basis. Thus, based on the examination information, it can be determined that a sufficient fluid connection exists between at least one examination site and a target location, so that by providing / planning extraction at the target location, a soil gas extraction effect is achieved at at least one examination site.

[0016] In particular, the investigation information can be used to determine or plan whether piping or the extraction lines of an extraction structure are necessary for soil gas extraction in a building room on the ground floor, and if so, where or in which building rooms on the ground floor. Furthermore, the investigation information can be used to determine whether, especially on its own, soil gas extraction from at least one building room in the basement is sufficient to reduce or maintain the radon activity concentration on the ground floor below a predefined limit.

[0017] For example, depending on the examination information, the extraction and / or an operating parameter of the extraction is carried out or adjusted at at least one target location and / or at at least one examination site. In this case, the planning may also include refraining from or not carrying out extraction of the soil gas at a specific examined examination site and / or target location and instead extracting the soil gas at another examination site and / or target location. This may be the case, for example, if an insufficient amount of indicator gas, in particular no indicator gas at all, which was released or introduced at a defined examination site, arrives or is detected at a specific target location.In other words, the soil area between one investigation site and the target site may have such a condition that little or no indicator gas introduced at the investigation site can be detected at the target site, so that it can be assumed that, conversely, soil gas extraction carried out at this target site would not result in effective extraction of soil gas escaping into the building at the investigation site.

[0018] However, if the floor area of ​​a first building room in which soil gas (e.g., radon) was detected has a sufficient fluid connection to at least one target location located in a second building room, soil gas from the first building room can be extracted via an extraction system at the target location in the second building room. This has the advantage that providing an extraction duct structure in the first building room can be avoided, as this is not necessary, and the soil gas that would penetrate into the first building room can be extracted via an extraction system in the second building room and through the floor area. This reduces or prevents noise pollution (e.g., flow noise) due to extraction noise in the first building room and / or reduces the piping material required for soil gas extraction in a building.

[0019] For example, a first and at least one second examination location can be determined, wherein an opening is provided for each examination location that connects a building space of the respective examination location with a floor area assigned to this examination location.

[0020] It is possible that, before carrying out the investigation, the soil gas is measured in at least one room of the building. For example, the soil gas is measured in a room at a test site. In other words, after determining a defined quantity or intensity of a soil gas in a room, at least one test site can be defined in this room. For example, the soil gas is measured in at least two rooms of the building, e.g., by means of a room air soil gas measurement. If this measurement exceeds a defined soil gas limit, it may be advisable to create a breakthrough to the floor area for this room of the building. This breakthrough can then be used to introduce the indicator gas into the floor area adjacent to the test site.

[0021] In an advantageous embodiment, it can be provided that during the execution of the investigation, i.e., for example, in, at least one opening in the building room or rooms, an indicator gas is dispensed, in particular introduced, whereby this applies in particular to the openings in the building room or rooms in which the measurement of the soil gas has resulted in a soil gas value that is above a predefined limit value.

[0022] It is possible that, after carrying out a design and / or planning method, soil gas extraction is carried out at the target location and / or at an investigation site depending on the investigation information. For example, the extraction and / or an operating parameter of the extraction is set at at least one target location and / or at least one investigation site depending on the investigation information. In other words, the investigation information can be used to determine the suitability of a target location for the extraction of an investigation site or its building space that can be extracted from this target location through or via the ground area. If no suitable target location for soil gas extraction from an investigation site distant from the target location through the ground area is found, the planning result can provide that for this investigation site orfor the building room assigned to this investigation site, an extraction system is provided that takes place directly in this building room. This means that for this building room, no extraction is carried out through or via the floor area to a destination distant from this investigation site. For example, in this case, the appropriate remediation measure would be to provide a pipe connection in the affected building room to connect a connection point at a breakthrough assigned to this building room to an extraction system. Through the investigation, at least one property, e.g. porosity, of the subsoil or soil area can be determined area-specifically and, depending on the determined property of the subsoil or soil, the required remediation measures can be implemented.of the floor area, an area-specific setting or design of the extraction between at least two planned examination locations, in particular an area-specific setting of the extraction at a plurality of extraction locations, can be carried out.

[0023] An indicator gas is applied via the application device to, i.e., into or onto, the at least one planned examination site, in particular into the at least one opening assigned to this examination site. For this purpose, at least one application device is connected to or assigned to the at least one opening of the examination site or to openings of a group of examination sites, such that the indicator gas can be introduced via the application device to, in particular into, the respective openings and is present in the base region in order to enable flow to the target site and the detection device arranged there, in the event of a sufficient fluid connection between the base region of the respective examination sites and the at least one target site.

[0024] The indicator gas can be introduced into the at least one examination site using overpressure or by means of suction pressure. For example, it is possible for the indicator gas to be introduced into at least one area of ​​the examination site, and in particular into the floor area, using overpressure. For this purpose, the application device can, for example, have a pressure-generating means or be fluidly connected to a pressure-generating means by means of which the indicator gas can be or is introduced into at least one area of ​​the examination site using pressure-support. For example, the application device can comprise a compressor, e.g., a blower, or be fluidly connected to a compressor, e.g., a blower, such that the indicator gas emitted by the application device is introduced into an area of ​​the at least one examination site under overpressure.The region of the at least one examination site or a breakthrough of this examination site may comprise a cavity, e.g., the breakthrough may be a bore at the at least one examination site into which the indicator gas is introduced.

[0025] During the examination, for example, the indicator gas can be sucked in at least at the at least one target location. By generating a negative pressure or applying a suction flow at the at least one target location, the indicator gas can be sucked in – provided there is a fluid connection in the floor area between the at least one examination location and the at least one target location. The indicator gas sucked in is analyzed or detected by the detection device, so that a conclusion can be drawn regarding the presence or absence and / or the degree of presence of a fluid connection between the at least one target location and the at least one examination location.For example, a suction device is arranged on the detection device and / or within a connecting line downstream of the detection device, so that a suction flow can be generated which guides gas sucked in from the target location through a detection section of the detection device. The suction device used here can also be used for later suctioning out the soil gas, e.g. during the course of the, in particular permanent, remediation measure. Alternatively, another suction means can be used to suck in the indicator gas during the investigation, which is provided in addition to the suction device used to extract the soil gas. For example, the detection device has a vacuum generating means ora suction means which is separate from the suction device used during the extraction of the soil gas and is used to generate the negative pressure at the second planned suction location during the examination. The suction device and / or the negative pressure generating means or the suction means can be designed, for example, as a blower or a turbine, in particular as a compressor. Optionally, the indicator gas can be sucked in at least temporarily at at least one target location and the indicator gas can be introduced under pressure at at least one examination location. In this case, it is possible for (a) the suction pressure of the suction device and / or the negative pressure generating means and / or (b) the pressure of the pressure-supported indicator gas introduction to be manually or automatically variable.

[0026] In a preferred embodiment, an application device which dispenses the indicator gas at a first and a second examination site can be provided, wherein, while the examination is being carried out, the detection device is set up to detect the indicator gas dispensed at at least the first and second examination site. This means that, provided there is a fluid connection between the target site and the first and second examination site, the indicator gas which has reached the target site is detected by the detection device. For example, the indicator gas can be dispensed at least at the second examination site after the dispensing of the indicator gas to the first examination site has ended. In this way, by observing the temporal distribution of the indicator gas, the indicator gas detected at the detection device can be assigned to its introduction site orto the original location where the indicator gas was introduced - i.e. to the respective test sites. In other words, it can be advantageous if a similar or identical indicator gas is introduced into the first and the at least one second test site, with no or no significant temporal overlap in the introduction of the indicator gas. Thus, due to the temporally separate introduction of the indicator gas, the measurement results of the recording device can be clearly assigned to the respective introduction locations or test sites at which the indicator gas was introduced and to the soil areas at the target site. Optionally, it can be provided that, while the test is being carried out, indicator gas is introduced into the first and the at least one second test site at the same time, at least temporarily.

[0027] It is possible for different indicator gases to be introduced into the first and at least the second examination site, in particular at least temporarily at the same time, wherein the difference between the indicator gases can be detected by the detection device and thus the detection of the substance components specifying or identifying the respective indicator gas can be carried out and the measurement results of the detection device can be assigned to the introduction sites, ie to the corresponding examination sites, of the different indicator gases.

[0028] It is possible for at least one detection device to be provided or set up at the first and at least one further target location for detecting the presence and / or a proportion and / or a quantity of at least one constituent substance of the indicator gas at the first and at least one further target location in order to carry out an examination of the soil area there. This is done in order to generate, through the examination, examination information that describes the soil structure at least between the at least one examination location and a first target location, as well as between the at least one examination location and the at least one further target location.The indicator gas introduced at the first examination site can thus be detected by a first detection device assigned to the first target site – in the event of a leak of the indicator gas at the first target site – and by a second detection device assigned to the further target site – in the event of a leak at the further target site. Depending on which detection device detects the indicator gas, it can be deduced whether a fluid connection exists between the at least one examination site and the first and / or at least one further target site.

[0029] It is possible for the indicator gas to be detected at the at least one further target location after the indicator gas has been detected at the first target location. In this case, for example, a single detection device can be used, which is first connected to the first and later to the further target location or is brought into fluid communication with the respective target location. Alternatively or additionally, a detection device can be fluidly connected to the first and the at least one further target location via line connections or can be fluidly connected via a valve in order to detect the indicator gas at each of the respective target locations.

[0030] A trace gas and / or tracer gas and / or forming gas can be used as an indicator gas, for example. A trace gas is defined as a gas that is present in small quantities in the Earth's atmosphere. Trace gases in the Earth's atmosphere are gases other than nitrogen, oxygen, and argon, which together make up 99.934% of the Earth's atmosphere (excluding water vapor). A gas containing sulfur and / or fluorine at least as a component is preferably used as the indicator gas; in particular, sulfur hexafluoride can be used as an indicator gas. Sulfur hexafluoride (SF6) is an inorganic chemical compound composed of the elements sulfur and fluorine with the molecular formula SF6. Under normal conditions, sulfur hexafluoride is gaseous, colorless, odorless, nontoxic, and extremely inert, and has proven to be an advantageous indicator gas for this application. Sulfur hexafluoride also exhibits good detectability by a detection device.It is optionally possible to use a forming gas as indicator gas, for example a gas mixture of (a) nitrogen (N2) and hydrogen (H2) or of (b) argon (Ar) and hydrogen (H2).

[0031] The term gas or indicator gas can also refer to a gas mixture consisting of two chemically and / or physically different gases. Examples of such gas mixtures are aerosols, e.g., fog and / or smoke, etc. It is possible for an artificial fog, e.g., stage fog, to be used as the indicator gas. For example, an indicator gas can be formed by an aerosol comprising solid and / or liquid (suspended) particles in a gas. An artificial fog can, for example, be generated by evaporating fog fluid; an evaporator fog device can be used for this purpose. For example, a water-based or oil-based fog fluid can be used. It has proven advantageous to use water, especially distilled water, together with, in particular, high-purity, propylene glycol or glycerin.The vaporizer fogging device may comprise a pump and a heating element, wherein the fog fluid is vaporized by heating to form an aerosol or the artificial fog.

[0032] The indicator gas can, for example, be provided with a dye or have a color, so that the detection device can identify the indicator gas by means of optical gas analysis. Alternatively or additionally, the detection of the indicator gas by means of the detection device can be carried out using chemical and / or physical methods in order to examine a quantitative and / or qualitative composition of the indicator gas and / or an indicator gas mixture or to detect the presence or absence and / or the quantity and / or proportion of the indicator gas in a gas stream supplied to the detection device. For example, the gas analysis is carried out with the aid of at least one reagent. The gas analysis can, for example, be carried out using at least one automatic instrument.Optionally, the gas analysis by means of the detection device may comprise gas chromatography and / or IR spectroscopy and / or mass spectrometry and / or thermal conductivity measurement.

[0033] It is possible to use at least a first and a second indicator gas, wherein the at least two indicator gases differ in at least one substance component that can be detected by the detection device and / or in a proportion of a common substance component that can be detected by the indicator detection device. For example, the first indicator gas is released at least partially, preferably predominantly, particularly preferably exclusively, at the first examination site and the second indicator gas is released at least partially, preferably predominantly, particularly preferably exclusively, at at least one further examination site, in particular at the same time. In other words, the different indicator gases are assigned to at least two examination sites or at least two groups of at least two examination sites each or are applied there. In this way, depending on the presence orDepending on the absence of the respective indicator gas and / or the quantity and / or volume, in particular the volume flow, and / or the proportion of the respective indicator gas, it can be concluded whether a fluid connection exists in the soil region between the target location comprising the detection device or present with the detection device for analyzing the indicator gas escaping there and the first and / or second group of test locations, and to what extent a fluid connection exists. For example, the first and second indicator gases are introduced at least temporarily and simultaneously into at least two different test locations, so that a conclusion can be drawn about their introduction location based on the different composition of the indicator gases.Optionally, three or more different indicator gases can be dispensed at three or more different test locations, so that based on the indicator gas assigned to the respective test location, upon detection of the respective indicator gas, a conclusion can be drawn about its dispensing location, i.e. the test location where it was introduced.

[0034] To extract soil gas, it is possible for a suction structure comprising suction lines to be arranged at at least two apertures, and for the suction structure to provide a valve means at each of the at least two apertures for shutting off and / or changing the flow of the extracted soil gas, and for the at least two valve means to be adjusted as a function of the examination information. In other words, the suction structure has a first suction line connected to a target location (e.g., first target location) and at least one further suction line connected to a further target location, such that soil gas can be extracted from the respective target locations via the suction lines. A valve means configured to change the opening cross-section of the suction line is arranged in at least one suction line, preferably in each suction line.The opening cross-section can be changed between a completely open state and a completely closed state. Preferably, intermediate positions of the valve means, which enable a partial narrowing of the opening cross-section, can be set manually or automatically in stages or continuously. This adjustment of the at least one valve means, preferably of the at least two valve means, particularly preferably of all valve means, can be carried out as a function of the examination information. This can therefore be carried out, for example, as a function of the gas permeability information between at least two target locations and / or examination locations, preferably all target locations and examination locations. This has the advantage that if, for example, the suction lines are connected to a common suction device, the suction power of the device can be effectively tailored to the individual actual target locations orThis allows the extraction system to be distributed among extraction locations. For example, the extraction system can be operated at a constant power level, and the resulting suction power can be adjusted via the branch point of a central line section to individual extraction branch lines, taking into account the prevailing gas permeability of the floor area at the individual extraction locations.

[0035] In addition to the method for designing and / or planning a suction system, the invention also relates to a device for designing and / or planning a suction system or for determining the fluid permeability of a soil area. This device comprises an application device and a detection device and, if appropriate, connection means for fluidly connecting the application device and the detection device to the apertures of the target location and / or the examination sites. The application device has a container filled or fillable with indicator gas, wherein the application device is configured to introduce an indicator gas discharged from the container through the aperture into the soil area adjacent to the examination site.The device comprises at least one application device, at least one detection device, and a suction structure, which is / are arranged (a) at at least two target locations and / or (b) at at least two examination sites or (c) at at least one target location and at least one examination site, wherein the device is configured to carry out a method described herein. For example, the device may comprise means that enable time information relating to the release of an indicator gas at an examination site to be generated (e.g., time means) and / or stored (storage means) and / or output (output means). Optionally, the device may comprise means configured to generate indicator gas information describing or defining an indicator gas, or to query and / or receive such information from the application device.The indicator gas information describes, for example, the indicator gas emitted via the application device. Furthermore, the device can comprise an assignment means which is set up to assign time information and / or the indicator gas information to at least one examination location and / or at least one group of examination locations at which the indicator gas was introduced. If detection by means of the detection device is planned at at least two target locations and discharge or introduction of an indicator gas is planned at at least two planned examination locations, the assignment information can describe information on the fluid permeability between at least a first target location and a first examination location. The examination information and / or the assignment information can, for example, be stored on a portable electronic device orissued by an electronic mobile device. For this purpose, the electronic device can be configured, for example, as a smartphone, tablet computer, and / or portable computer (e.g., laptop). For this purpose, the capture device and / or the application device and / or a computer unit can be equipped with a wired, wireless, or contactless data connection in order to exchange information unidirectionally or bidirectionally with each other or with the electronic device.

[0036] Optionally, the invention relates to a device for extracting a soil gas, in particular for extracting radon or a gas mixture containing radon, from a building.

[0037] All advantages, details, embodiments and / or features of the method according to the invention are transferable or applicable to the devices according to the invention and vice versa.

[0038] The invention is explained in more detail using exemplary embodiments in the drawings. In the drawings: Fig. 1 a schematic diagram of a ground floor of a building intended for the extraction of soil gas according to an embodiment; Fig. 2 a schematic diagram of a basement of the building from Fig. 1; Fig. 3 a schematic representation of a method for extracting soil gas from a building according to an embodiment; Fig. 4 a schematic diagram of a building in a state of renovation, with soil gas extraction being provided in each of the rooms on the ground floor and in the basement affected by soil gas, in accordance with the state of the art; Fig. 5 shows a schematic diagram of a building during the execution of an examination using a detection device at a first target location and an application device at a first examination location according to an embodiment; Fig. 6 a schematic diagram of a building during the execution of an investigation according to Fig. 5, but with a blow-out of the indicator gas in the area of ​​the detection device; Fig. 7 a schematic diagram of a building during the execution of an investigation according to Fig. 5, but using an application device at a second examination site; Fig. 8 a schematic diagram of a building during the execution of an investigation according to Fig. 5, but using an application device at a third examination site; Fig. 9 a schematic diagram of a building during the execution of an investigation according to Fig. 8, but with the arrangement of a detection device at a second destination; Fig. 10 a schematic diagram of a building in the state of renovation, whereby based on the findings of the investigation according to the invention a Fig. 4 modified extraction configuration is applied; Fig. 11 is a schematic diagram of a building during the execution of an investigation using multiple detection devices and multiple application devices according to an embodiment; Fig. 12 a schematic diagram of a building during the execution of an investigation according to Fig. 11, but using two different indicator gases according to one embodiment; Fig. 13 a schematic diagram of a building during the execution of an investigation using three detection devices and three application devices according to an embodiment.

[0039] The figures show a method for designing and / or planning an extraction system for a soil gas 2, in particular radon or a gas mixture containing radon, in a building 3. In Fig. 1 shows a ground floor plan of a semi-basement building 3, the basement of which is in Fig. 2. In the rooms 31, 32, 33, and 34 on the ground floor, marked with exemplary measuring devices 23, a soil gas concentration was measured that exceeded a defined soil gas limit. For example, in the case of radon or a radon-containing mixture as soil gas, 300 Bq / m 3 annual average (limit value from the Radiation Protection Act) or 100 Bq / m 3on an annual average (WHO limit value) as the soil gas limit value. The objective is now to reduce the soil gas concentration in the building rooms 31, 32, 33, 34 which have an excessively high soil gas concentration and thus to bring it below the soil gas limit value by means of extraction, in particular underfloor extraction. In the example shown in the figures, at least some of the building rooms 31, 32, 33, 34 which have an excessively high soil gas value are building rooms 31, 32, 33, 34 which are in contact with the ground, i.e. at least partially, preferably entirely, rooms which do not have a basement. The further building room 35 is located in the basement and can, for example, also have a soil gas concentration in the room air above a defined soil gas limit value.

[0040] In order to enable the extraction of soil gas with as little piping as possible, especially on the ground floor, and / or with low noise pollution, especially on the ground floor, and / or with low material expenditure, the planning and design of the extraction of soil gas is carried out as described herein.

[0041] First, at least one investigation location 4, 6, 8 of a building room 31, 32, 33, 34 is determined 100, wherein a breakthrough is provided to the investigation location 4, 6, 8. In other words, the investigation location 4, 6, 8 is a connection between the interior of a building room 31, 32, 33, 34 having an excessively high soil gas value and the ground or floor area 13. Since the affected building room 31, 32, 33, 34 has no or only partial basement, there is an option of connecting the interior to the floor area 13 by means of a breakthrough by penetrating a section of the floor (e.g. the floor). B. by drilling through a ground-contacting wall section and / or a ground-contacting floor section of a building space 31, 32, 33, 34. This breakthrough forms a fluid connection between the building space 31, 32, 33, 34 and the adjacent soil or floor area 13.In other words, in a building space 31, 32, 33, 34, an examination location 4, 6, 8 is formed or defined by creating an opening connecting this building space 31, 32, 33, 34 with a floor area 13 assigned to this examination location 4, 6, 8.

[0042] It is possible that several openings of the examination sites 4, 6, 8 and / or target locations 5, 7, 9 are initially defined or created and additionally temporarily sealed gas-tight with a closure 24, so that the transfer of the indicator gas 10, 10' from a defined examination site to a target location is facilitated and the indicator gas transmission through the base region 13 is not reduced or distorted by possible openings from further examination sites and / or target locations. A closure 24 can, for example, also be implemented by a lockable valve, in particular by a lockable valve means 19, 19'. At least one closure 24 can be detachably attached to the at least one examination site 4, 6, 8 and / or to the at least one target location 5, 7, 9.

[0043] Furthermore, at least one application device 11, 11' dispensing an indicator gas 10, 10' is provided 110 to the at least one opening of the examination site 4, 6, 8. For this purpose, the application device 11, 11' is connected to the opening of the at least one examination site 4, 6, 8 or the at least one building room 31, 32, 33, 34, such that an indicator gas 10, 10' dispensed via the application device 11, 11' can be introduced via the opening into the floor area 13 adjacent to the examination site 4, 6, 8.

[0044] In a further method step, at least one target location 5, 7, 9 is determined 120, wherein the at least one target location 5, 7, 9 comprises an opening. In other words, at least one target location 5, 7, 9 is determined, and an opening in the building space 35 of the target location 5, 7, 9 is connected, e.g., by drilling, to a floor area 13 associated with and / or adjacent to the target location 5, 7, 9. The building space 35 associated with the target location 5, 7, 9 can preferably be located in a lower-lying area of ​​the building relative to the examination locations 4, 6, 8, e.g., in a lower-lying building floor. Thus, the target location 5, 7, 9 and thus the opening of a connection point of a detection device 12, 12' can be located in a basement of the building 3.The target location 5, 7, 9 is a location of a building room 35 which is at least initially considered as a suitable location for connecting an extraction device 16 for extracting soil gas to reduce the soil gas values ​​in the other building rooms 31, 32, 33, 34 and whose suitability for this purpose will be determined in the course of the method described herein.

[0045] Furthermore, at least one detection device 12, 12' is provided 130 or connected to the target location 5, 7, 9, wherein the detection device 12, 12' is configured to detect a presence and / or a proportion and / or a quantity of at least one substance component of the indicator gas 10, 10' at the at least one target location 5, 7, 9. For this purpose, the detection device 12, 12' is connected to an opening in the target location 5, 7, 9, so that indicator gas 10, 10' present or reaching the target location(s) 5, 7, 9 can be detected by the detection device 12, 12'.

[0046] In a further method step, an examination 150 is carried out 140 to determine at least one property of a soil structure of the soil region 13 between the at least one examination location 4, 6, 8 and the at least one target location 5, 7, 9, and an examination information item 155 is generated 165. The examination 150 comprises dispensing 160 an indicator gas 10, 10' to at least one examination location 4, 6, 8 and detecting 170 the presence and / or the proportion and / or the amount of at least one substance component of the indicator gas 10, 10' at at least one target location 5, 7, 9. The examination information item 155 can indicate or describe whether and / or to what extent a fluid connection through the soil region 13 exists between the at least one examination location 4, 6, 8 and the at least one target location 5, 7, 9.

[0047] Finally, a planning and / or design 180 of an extraction system 200 for soil gas 2 - in particular at a breakthrough of at least one target location 5, 7, 9 and / or at a breakthrough assigned to at least one examination location 4, 6, 8 - takes place depending on the examination information 155. In other words, the planning and / or design 180 of an extraction system 200 for a soil gas 2 of a building 3 takes place depending on the examination information 155. Thus, the at least one and / or more locations or breakthroughs for the extraction of soil gas 2 can be determined based on the examination information 155. Alternatively or additionally, (a) the extraction device 16 for extracting the soil gas 2 can be set and / or specified in its operating parameters and / or in its machine data and / or (b) an extraction structure 18, e.g.The cross-section and / or the course of the extraction lines 17, 17' and / or any valve means 19, 19' of the extraction structure 18 are designed and / or determined and / or adjusted depending on the examination information 155. The soil gas 2 extracted by the extraction device 16 reaches an area outside the building 3 via an opening in a line end 22 of the extraction structure 18. For example, it can be blown out into the environment.

[0048] During execution 140 of the examination 150, an indicator gas 10, 10' can be emitted, for example, at, i.e., in or onto, at least one breakthrough of the building room(s) 31, 32, 33, 34, 35, in which or in which the measurement 210 of the soil gas 2 has resulted in a soil gas value that lies above a predefined limit value. In other words, a measurement 210 can first be carried out in the building 3, and if this measurement 210 results in an elevated soil gas value or a soil gas value that lies above a predefined limit value, a remediation measure is indicated for the building 3 or for at least individual building rooms 31, 32, 33, 34, 35 of the building 3. Preferably, a measurement 210 is carried out for each of the building rooms 31, 32, 33, 34, 35 of the building. In at least some of the building rooms 31, 32, 33, 34, 35 in which increased soil gas values ​​were detected, a breakthrough to the ground or to the floor area 13 is created and used as an interface orInlet or outlet point for the indicator gas 10, 10'. In the . Fig. 1 and Fig. In the building 3 shown in Figure 2, an elevated soil gas concentration was also detected in the space located between building rooms 31 and 32. However, no investigation location or breakthrough is created in this space, since it is first investigated whether the soil gas 2 penetrating this space is already being or can be removed via the target location 5 by an extraction system provided for building room 31. Alternatively, at least one investigation location and / or target location can be defined for each of the building rooms 31, 32, 33, 34, 35 that have an elevated soil gas value.

[0049] The indicator gas 10, 10' can be introduced, for example, by means of overpressure into a passage of at least one examination site 4, 6, 8. In particular, at least one application device 11, 11' has a pressure generating means, cf. Fig. 5, by means of which the indicator gas 10, 10' can be introduced under pressure into or into the opening assigned to it in at least one examination location 4, 6, 8. Alternatively or additionally, the indicator gas 10, 10' can be sucked in at the at least one target location 5, 7, 9 during the examination 150. This sucking in can take place, for example, via a suction device 16 that is fluidly connected to the detection device 12, 12' and / or to the opening at the target location 5, 7, 9. Alternatively or additionally, at least one detection device 12, 12' can comprise a suction means 20 or a suction means 20 can be assigned to the detection device 12, 12', cf. Fig. 4. This suction means 20 may not be used during the execution 190 of the extraction 200 of the soil gas 2. In other words, in addition to the suction device 16 for the extraction 200 of the soil gas 2, a suction means 20 may be provided which is used, in particular exclusively, for the execution 140 of the examination 150. At least one suction means 20 assigned to a detection device 12, 12' may be arranged or configured upstream and / or downstream of the detection device 12, 12'. The suction means 20 may be detachably and / or permanently connected to the detection device 12, 12'. It is also possible for the detection device 12, 12' to be held manually against an outlet opening (not shown) of the suction means 20 in order to detect the indicator gas 10, 10' drawn in by the suction means 20. The outlet opening of the suction means 20 can be closed by a valve (not shown).It is possible for the at least one suction means 20 to have a particularly rigid (e.g. pipe connection) or flexible (e.g. hose) fluid connection with the opening associated with the at least one target location, e.g. through a base plate.

[0050] By introducing pressure-supported indicator gas at the examination site and / or by sucking in indicator gas at the target site under negative pressure, the sensitivity of determining or detecting any fluid permeability or porosity of the soil region 13 between at least one target location 5, 7, 9 and at least one examination location 4, 6, 8 can be increased. The reliability of the examination 150 can also be increased, since more indicator gas 10, 10' is supplied to the detection device 12, 12', thus simplifying and / or more accurately detecting. Alternatively or additionally, a detection device 12, 12' can be used that has a lower sensitivity for detecting the indicator gas 10, 10'.

[0051] Optionally, provision 110 of at least one application device 11, 11' that dispenses the indicator gas 10, 10' at at least one first and one second examination site 4, 6 can be made, wherein, during execution 140 of the examination 150, the at least one detection device 12, 12' is configured to detect the indicator gas 10, 10' dispensed at at least the first and second examination sites 4, 6 and conveyed via the base region 13 to the at least one target site 5, 7, 9. The indicator gas 10, 10' dispensed at the at least one examination site 4, 6, 8 can, for example, be introduced into the apertures of the first and second examination sites 4, 6. For this purpose, an application device 11, 11' can be connected to at least two examination sites 4, 6 via a branching channel structure.Alternatively or additionally, a first application device 11 can be arranged or formed at the first examination site 4, and a second application device 11' can be arranged or formed at a second examination site 6. As shown in FIGS. Fig. 6 and Fig. 7 or 8 and Fig. As shown in Figure 9, an application device 11 or a detection device 12 can be moved from one examination location 4, 6, 8 or target location 5, 7, 9 to another after performing a detection in order to perform a further detection.

[0052] Preferably, the indicator gas 10, 10' is dispensed at least at the second examination site 6 after the dispensing 160 of the indicator gas 10, 10' at the first examination site 4 has been terminated. In other words, the dispensing of an indicator gas 10, 10' at the first examination site 4 can first be terminated or stopped before the indicator gas 10, 10' is dispensed at at least one second examination site 6, 8.

[0053] For example, at least one detection device 12, 12' for detecting the presence and / or a proportion and / or a quantity of at least one substance component of the indicator gas 10, 10' at at least the first and at least the second target location 5, 7, 9 can be provided. For example, the examination 150 is intended to generate examination information 155 which describes the soil structure, in particular the fluid permeability, of the soil region 13 between at least one examination location 4, 6, 8 and the first and second target locations 5, 7. For example, a detection of the indicator gas 10, 10' at at least the second target location 7 can be carried out after - i.e., not before - a detection 170 of the indicator gas 10, 10' at the first target location 5 has been completed.

[0054] For example, a detection 170 of the indicator gas 10, 10' at the first and at least the second target location 5, 7, 9 can be carried out at least temporarily simultaneously, preferably predominantly simultaneously, cf. Fig. 11. It may prove advantageous if the application devices 11, 11' and / or the detection device 12, 12' and / or the suction device 16 are connected to a computer unit 15 for exchanging information via at least one data connection 21, e.g., via data lines. For example, control and / or detection information can be transmitted and / or output to the computer unit 15. During an at least temporary or always simultaneous detection 170 of the indicator gas 10, 10', it may prove advantageous if at least two different indicator gases 10, 10' are output to the examination sites 4, 6, 8 or used for possible target-side detection. It is possible for the examination information 155 to be processed in the computer unit 15 and / or stored in a storage unit 14 connected to the computer unit 15.The examination information 155 and / or control and / or detection information of the method, in particular of the at least one application device 11, 11' and / or detection device 12, 12' and / or suction device 16 and / or suction means 20, can be stored and / or retrieved via the storage unit 14.

[0055] A computer unit 15 and optionally a storage unit 14 connected to the computer unit 15 via a data link can control and / or regulate at least one valve means 19, 19' and / or at least one suction device 16 and / or at least one suction means 20 and / or at least one pressure generating means associated with an application device. For example, the examination information 155 is processed in the computer unit 15 and / or stored in the storage unit 14.

[0056] The extraction 200 of soil gas 2 can, for example, be carried out by means of an extraction structure 18 whose extraction lines 17, 17' are connected to at least two of the target locations 5, 7, 9. In the extraction lines 17, 17', each target location 5, 7, 9 is assigned at least one valve means 19, 19' for blocking or changing the flow of the extracted soil gas 2. The at least two valve means 19, 19' are or can be adjusted depending on the examination information 155. For example, at least one valve means 19, 19' can be controlled via a control signal from a computer unit 15. An opening cross-section can be changed automatically or manually via the valve means 19, 19' in order to adjust the suction intensity or suction effect prevailing at the respective target locations 5, 7, 9. For this purpose, it is advantageous to use the examination information 155 obtained from the examination 150.

[0057] In general, at least one valve means 19, 19' can be connected to the computer unit 15 via a data connection 21 for unidirectional or bidirectional data exchange. Optionally, at least one suction device 16, which is used to carry out 190 the suction 200, can be connected to the computer unit 15 via a data connection 21. This makes it possible, for example, for an adjustment and / or control of the suction device 16 to be carried out or executable depending on the examination information 155. The data connection 21 can be wired or wireless.

[0058] It may prove advantageous to use a tracer gas and / or tracer gas as the indicator gas 10, 10'. For example, a gas containing sulfur and / or fluorine at least as a component can be used as the indicator gas 10, 10'. Sulfur hexafluoride SF6 has proven advantageous as the indicator gas 10, 10' because it is non-toxic and can be reliably detected by a detection device 12, 12'.

[0059] For example, at least a first and a second indicator gas 10, 10' are used, wherein the at least two indicator gases 10, 10' differ in at least one substance component detectable by the at least one detection device 12, 12' and / or in a portion of a common substance component detectable by the detection device 12, 12'. The first indicator gas 10 can be emitted at least partially, preferably predominantly, particularly preferably exclusively, at the first examination site 4, and the second indicator gas 10' can be emitted at least partially, preferably predominantly, particularly preferably exclusively, at at least one second examination site 6, 8, cf. Fig.12. Thus, it is possible for the second indicator gas 10' to be dispensed at at least one second test site 6, 8, but not at a test site—here, the first test site 4—where the first indicator gas 10 is or was dispensed. Thus, the use of different indicator gases 10, 10' for at least two test sites 6, 8 can improve the determination of the fluid permeability of these test sites 6, 8.

[0060] To carry out 190 the extraction 200 of soil gas 2, for example, an extraction structure 18 comprising extraction lines 17, 17' can be arranged at at least two openings, and the extraction structure 18 can each have a valve means 19, 19' at the at least two openings for blocking and / or changing the flow of the extracted soil gas 2, and the at least two valve means 19, 19' can be adjusted depending on the examination information 155. The valve means 19, 19' can influence the permeability or flow resistance for a extraction flow guided via the valves 19, 19', wherein the adjustment of these valves or their flow resistance preferably takes place using or depending on the examination information 155.

[0061] In a preferred embodiment, a method for extracting 200 a soil gas 2 is carried out, wherein, after executing a planning and / or design method 180 described herein, an extraction 200 of soil gas 2 is carried out 190 at at least one target location 5, 7, 9 and / or at at least one examination location 4, 6, 8 depending on the examination information 155. For example, the extraction 200 and / or an operating parameter of the extraction 200 is adjusted at at least one target location 5, 7, 9 and / or at least one examination location 4, 6, 8 depending on the examination information 155.

[0062] In addition to the method for planning and / or designing 180 an extraction system 200, the invention relates to a device 1 for planning and / or designing 180 an extraction system 200 of a soil gas 2, in particular radon or a gas mixture containing radon, on a building 3. This device 1 comprises an application device 11, 11' and a detection device 12, 12', wherein the device 1 is configured to carry out a method for planning and / or designing 180 an extraction system 200 described herein.

[0063] Furthermore, the invention relates to a device 1 for extracting 200 a soil gas 2, in particular radon or a gas mixture containing radon, from a building 3. This device 1 comprises an application device 11, 11', a detection device 12, 12', and an extraction structure 18, which is preferably connected to a penetration of a target location 5, 7, 9 and / or to a penetration of an investigation site 4, 6, 8. The device 1 is configured to carry out a method described herein for extracting 200 a soil gas 2 from a building. LIST OF REFERENCE SYMBOLS 1 device 2 Soil gas 3 buildings 4 first investigation site 5 first destination 6 second examination site 7 second destination 8 third investigation site 9 third destination 10, 10' indicator gas 11, 11' Application device 12, 12' detection device 13 Floor area 14 Storage device 15 computer unit 16 Extraction device 17, 17' suction line 18 Extraction structure 19, 19' valve means 20 suction agents 21 Data connection 22 line end of 18 23 measuring device 24 closure 31 first building room 32 second building room 33 third building room 34 fourth building room 35 fifth building room (basement) 100 Determining 4, 5, 6, 7, 8 110 Providing 11 120 Determining 5, 7, 9 130 Providing 12, 12' 140 Execute 150 Investigation 155 Examination information 160 Spending 10, 10' 165 Creating 155 170 Capture of 10, 10' 180 Planning and / or laying out 200 190 Executing 200 200 suction of 2 210 Measurement of 2

Claims

[1] Method for planning and / or designing an extraction system for a soil gas (2), in particular radon or a gas mixture containing radon, in a building (3), comprising the following method steps: - determining (100) at least one examination location (4, 6, 8) of a building (3), wherein the examination location (4, 6, 8) comprises an opening which connects a building space (31, 32, 33, 34) of the examination location (4, 6, 8) with a floor area (13) assigned to this examination location (4, 6, 8); - Providing (110) at least one application device (11, 11') which dispenses an indicator gas (10, 10') to the at least one opening of the at least one examination site (4, 6, 8); - determining (120) at least one destination (5, 7, 9), wherein the at least one destination (5, 7, 9) comprises an opening which connects a building space (35) of the destination (5, 7, 9) to a floor area (13) assigned to the destination (5, 7, 9); - Providing (130) at least one detection device (12, 12') at the at least one target location (5, 7, 9), wherein the detection device (12, 12') is configured to detect a presence and / or a proportion and / or a quantity of at least one constituent of the indicator gas (10, 10') at the at least one target location (5, 7, 9), - carrying out (140) an examination (150) determining at least one property of a soil structure of the soil region (13) between the at least one examination location (4, 6, 8) and the at least one target location (5, 7, 9) and generating (165) examination information (155), wherein the examination (150) comprises emitting (160) an indicator gas (10, 10') to at least one examination location (4, 6, 8) and detecting (170) the presence and / or the proportion and / or the amount of at least one substance component of the indicator gas (10, 10') at at least one target location (5, 7, 9) and - Planning and / or designing (180) an extraction (200) of soil gas (2) depending on the examination information (155). [2] Method according to claim 1, characterized by that before carrying out (140) the examination (150) a measurement (210) of the soil gas (2) is carried out in at least one building room (31, 32, 33, 34) of the building (3), preferably a measurement (210) of the soil gas (2) is carried out in a building room (31, 32, 33, 34, 35) of an examination location (4, 6, 8), particularly preferably measurements (210) of the soil gas (2) are carried out in at least two building rooms (31, 32, 33, 34) which each comprise a breakthrough of an examination location (4, 6, 8). [3] Method according to claim 2, characterized bythat during the execution (140) of the examination (150) an indicator gas (10, 10') is emitted to at least one opening of the building room(s) (31, 32, 33, 34), in which the measurement (210) of the soil gas (2) has resulted in a soil gas value that lies above a predefined limit value. [4] Method according to one of the preceding claims, characterized by that the indicator gas (10, 10') is introduced into a breakthrough of at least one examination site (4, 6, 8) by means of overpressure, in particular the application device (11, 11') has a pressure generating means by means of which the indicator gas (10, 10') can be introduced into a breakthrough of at least one examination site (4, 6, 8) in a pressure-supported manner. [5] Method according to one of the preceding claims, characterized by that during the examination (150) at the at least one target location (5, 7, 9) the indicator gas (10, 10') is sucked in. [6] Method according to one of the preceding claims, characterized by Providing (110) at least one application device (11, 11') which dispenses the indicator gas (10, 10') at at least one first and one second examination location (4, 6), wherein during the execution (140) of the examination (150), the at least one detection device (12, 12') is set up to detect the indicator gas (10, 10') dispensed at at least the first and second examination location (4, 6) and which has reached the target location (5, 7, 9) through the base region (13). [7] Method according to claim 6, characterized by that the indicator gas (10, 10') is dispensed at least at the second examination site (6) after the dispensing (160) of the indicator gas (10, 10') at the first examination site (4) has been completed. [8] Method according to one of the preceding claims, characterized bythat at least one detection device (12, 12') for detecting the presence and / or a proportion and / or a quantity of at least one substance component of the indicator gas (10, 10') at at least the first and at least the second target location (5, 7, 9) is provided at least at a first and at least one second target location (5, 7, 9), in particular in order to generate, by means of the examination (150), examination information (155) which describes the soil structure of the soil region (13) between at least one examination location (4, 6, 8) and the first and second target locations (5, 7). [9] Method according to claim 8, characterized by that detection of the indicator gas (10, 10') is carried out at at least the second target location (7) after detection (170) of the indicator gas (10, 10') at the first target location (5) has been completed. [10] Method according to one of claims 1-8, characterized bythat a detection (170) of the indicator gas (10, 10') at the first and at least the second target location (5, 7, 9) is carried out at least temporarily simultaneously, preferably predominantly simultaneously. [11] Method according to one of the preceding claims, characterized by that a trace gas and / or tracer gas and / or a forming gas is used as indicator gas (10, 10'), preferably a gas comprising sulfur and / or fluorine at least as a component is used as indicator gas (10, 10'), particularly preferably sulfur hexafluoride (SF6) is used as indicator gas (10, 10'). [12] Method according to one of the preceding claims, characterized bythat at least one first and one second indicator gas (10, 10') are used, wherein the at least two indicator gases (10, 10') differ in at least one substance component that can be detected by the at least one detection device (12, 12') and / or in a portion of a common substance component that can be detected by the detection device (12, 12'). [13] Method according to claim 12, characterized by that the first indicator gas (10) is emitted at least partially, preferably predominantly, particularly preferably exclusively, at the first examination site (4) and the second indicator gas (10') is emitted at least partially, preferably predominantly, particularly preferably exclusively, at at least one second examination site (6, 8). [14] Method according to one of the preceding claims, characterized byin that, in order to carry out (190) the extraction (200) of soil gas (2), a suction structure (18) comprising suction lines (17, 17') is arranged at at least two openings, and the suction structure (18) provides a valve means (19, 19') at each of the at least two openings for blocking and / or changing the flow of the extracted soil gas (2), and the at least two valve means (19, 19') are adjusted as a function of the examination information (155). [15] Method for extracting (200) a soil gas (2), wherein, after carrying out a method for planning and / or designing (180) according to one of the preceding claims, an extraction (200) of soil gas (2) is carried out (190) at at least one target location (5, 7, 9) and / or at at least one examination location (4, 6, 8) as a function of the examination information (155), preferably the extraction (200) and / or an operating parameter of the extraction (200) is set at at least one target location (5, 7, 9) and / or at least one examination location (4, 6, 8) as a function of the examination information (155). [16] Device (1) for planning and / or designing (180) an extraction system (200) of a soil gas (2), in particular radon or a gas mixture containing radon, on a building (3), comprising an application device (11, 11') and a detection device (12, 12'), wherein the device (1) is designed to carry out a method according to one of claims 1 to 14, wherein the application device (11, 11') has a container filled or fillable with indicator gas (10, 10') and the application device (11, 11') is designed to introduce an indicator gas (10, 10') emitted from the container via the opening into the soil region (13) adjacent to the examination site (4, 6, 8). [17] Device (1) for extracting (200) a soil gas (2), in particular radon or a gas mixture containing radon, from a building (3), comprising an application device (11, 11'), a detection device (12, 12') and an extraction structure (18), wherein the device (1) is designed to carry out a method according to claim 15, wherein the application device (11, 11') has a container filled or fillable with indicator gas (10, 10') and the application device (11, 11') is designed to introduce an indicator gas (10, 10') emitted from the container via the opening into the soil region (13) adjacent to the examination site (4, 6, 8).

Images