Transportable container

Abstract

A sealable transportable container 100 comprises: a first region 110 for entrance by a user through a first door 116; a first air inlet 130 to permit air to flow into the first region; a first air out

Description

Field of the invention The present invention relates to a sealable transportable container and a method of operating the sealable transportable container. The sealable transportable container may be for the storage and transport of hazardous waste. Background to the invention It is known to provide storage and transportation containers for waste, such as skips. For hazardous waste materials, such as fibrous waste (e.g. asbestos), it is known to provide a closed skip. It is in this context that the present inventions have been devised. Summary of the invention In accordance with an aspect of the present invention, there is provided a sealable transportable container. The sealable transportable container comprises a first region for entrance by a user through a first door. The sealable transportable container comprises a first air inlet configured to permit air to flow into the first region therethrough. The sealable transportable container comprises a first air outlet configured to permit air to flow out of the first region therethrough. The sealable transportable container comprises a pressure control system configured to cause a first airflow, away from the first door and towards the first air outlet, to thereby cause a lower pressure inside the container than an ambient pressure outside the container. According to another aspect of the present invention, there is provided a method of operating a sealable transportable container. The sealable transportable container comprising: a first region for entrance by a user through a first door, a first air inlet configured to permit air to flow into the first region therethrough, a first air outlet configured to permit air to flow out of the first region therethrough, and a pressure control system. The method comprises causing a first airflow, away from the first door and towards the first air outlet, to thereby cause a lower pressure inside the container than an ambient pressure outside the container. Advantageously, by providing an airflow away from the first door, which is the door that the user uses to enter and exit the container, air is moved away from the first door. In turn, any undesirable airborne materials within the first region of the container will be moved away from the first door and are therefore less likely to escape through the first door when the first door is opened. This prevents a build-up of air from forming near the first door in the first region. Therefore, when the user opens the door to enter or exit the container, the air inside the first region does not escape through the first door to the exterior of the container. This prevents, or at least reduces, the release of air from inside the container to the exterior of the container. In addition, another advantage is that the provision of a lower pressure inside the container compared to the exterior of the container means that when the first door is opened, air moves into the container through the doorway, rather than out of the doorway. Therefore, air from the exterior of the apparatus is drawn into the container to again further prevent the release of air from inside the container to the exterior of the container. The above advantages are particularly beneficial when the container is used to store and / or transport hazardous waste material, which may be of the kind discussed further below. This is because it is important to prevent the release of airborne hazardous waste material from escaping the container when the first door is opened. It will be understood that a sealable transportable container is typically any apparatus which can be, at times, sealed, and which can be transported, for example by being lifted, rolled, or otherwise moved from one location to another location, and which can retain material within a chamber thereof. The container may be a storage container. The container may be a shipping container. The container may be an intermodal container. The container may be a skip. The container may be a roll-on, roll-off skip. It will be understood that sealed in this context should be taken to mean that flow of air between the container and an external environment of the container is restricted, or even substantially prevented. In general, the container is intended for storing hazardous waste and transporting that waste to another place different from where it was loaded into the container. This container is particularly beneficial for transporting hazardous waste that is capable of contaminating air with which it comes into contact. As an example, the container may be used to store and transport hazardous construction waste from a construction site to a disposal centre for this type of material. However, other uses of this container when it is desired to move hazardous waste from one place to another will be envisaged. Typically, the first air inlet is an aperture which allows air to move into the first region. Typically, the first air outlet is an aperture which allows air to move out of the first region. It may be that the first air inlet is covered by horizontal slats (i.e. louvres) which are moveable to open and close the first air inlet. It may be that the louvres are selfclosing louvres. It may be that the louvres are passive self-closing louvres. The louvres may typically open when the first door is closed and the pressure control system is activated. Typically, the louvres on the first air inlet may be configured to be opened by applying suction thereto from within the container. In other words, the louvres may be hingedly mounted at an inner side of the first air inlet, hinged at an upper side of each louvre. Thus, suction will cause the louvres to open and permit airflow through the first air inlet into the container. Without sufficient suction, the louvres will not be caused to open, and the air within the container will be unable to pass out of the container through the first air inlet. In this way, when the first door is closed, and any other inlets or outlets are also closed, the container can be considered to be sealed. The first door may open outwardly, away from the first region. In other words, to open the first door from outside the container, the user typically pulls the door open. The first door may be biased towards the closed position (e.g. i.e. the first door may be selfclosing). The first door may allow the user to enter the container, particularly the first region, from the outside of the container, and to exit the container. The first door is typically dimensioned to allow a human user to pass through the respective doorway when opened. By this we mean that the first door has a greater height than its width and may typically be openable (e.g. pivotably hinged) along a vertical axis. The first door may be (un)lockable from the outside of the container. The first door may be released using controls on the outside of the container. The first door may be moveable from a closed position to an open position (and vice versa). It may be that the closed position refers to an extremity of the range of motion of the first door. It may be that the open position refers to the other extremity of the range of motion of the first door. The first door may be biased to a closed position, or at least closer to the closed position than the open position. Optionally, the pressure control system comprises an airflow generator, as will be discussed in more detail below. The airflow generator causes the first airflow in that it uses moveable members to displace air in the vicinity of the airflow generator. Optionally, the pressure control system comprises a controller. The controller may typically be configured to control the airflow generator. It may be that the controller comprises one or more processors. It may be that the controller comprises computer readable memory. It may be that the computer readable memory is configured to store instructions which, when executed by the one or more processors, causes operation of the airflow generator. It may be that the controller exchanges data and / or control signals with other components of the container. The computer readable memory may be non-transitory computer readable memory. It may be that the pressure exterior to the container is an ambient pressure. It may be that the pressure exterior to the container is an atmospheric pressure depending on the height above sea-level. It may be that the pressure control system is configured to cause a differential pressure between the first region of the container and an external environment of the container of at least 1 kilopascal, such as at least 3 kilopascals, for example at least 5 kilopascals. The pressure control system may be configured to cause a differential pressure between the first region of the container and an external environment of the container of no more than 50 kilopascals, such as no more than 30 kilopascals, for example no more than 10 kilopascals. In another example, the pressure control system may be configured to cause a differential pressure between the first region of the container and an external environment of the container of no more than 1500 kilopascals, such as no more than 1000 kilopascals, for example no more than 500 kilopascals. The pressure control system may be configured to cause a differential pressure between the first region of the container and an external environment of the container of more than 10 kilopascals, such as more than 50 kilopascals, for example more than 100 kilopascals. The first region may be subdivided into a first portion and a second portion. The first portion of the first region is typically in the vicinity of the first door within the first region. It may be that the first portion of the first region is an area within 0.5m, within 1 m, within 1,5m or within 2m of the first door. Typically, the second portion of the first region is an area within the first region nearer to the second wall than the first wall, i.e. in the rear of the container. It may be that the second portion of the first region is an area over 1.5m, over 2m, over 2.5 or over 3m away from the first door. Typically, the first airflow is away from the first region meaning that the first airflow is in a direction away from the first door. Typically, the first airflow is towards the second portion of the first region in that the first airflow is towards the rear half of the container. It may be that the container has a width of at least 1 meter, a height of at least 1.5 meters and a depth of at least 4 meters. It may be that the container has a width of at least 1.5m, at least 2m or at least 2.5m, a height of at least 1.5 meters, at least 2m or at least 2.5m and a depth of at least 4 meters, at least 5m, at least 6m or at least 7m. Advantageously, the container is dimensioned so as to allow an adult human to enter the container and walk through the first region, at least. It may be that the container comprises an attachment component for connecting the container to a transport vehicle. Advantageously, the container can be securely fastened to the transport vehicle to ensure that the container remains attached to the transport vehicle when the transport vehicle is in motion. It may be that the attachment component comprises one or more of: a latch mechanism, a chain connection, a bolt mechanism and a twistlock. However, other mechanisms for attaching the container to the transport vehicle will be envisaged. It may be that the sealable transportable container is for the storage and transportation of hazardous waste. It may be that the sealable transportable container further comprises a second region for loading, storing and unloading the hazardous waste. It may be that the second region comprises a second door to an exterior of the container. It may be that the second door is openable for unloading the hazardous waste. It may be that the container comprises a third door between the first region and the second region, wherein the third door is openable for loading the hazardous waste in the second region. It may be that the first region is defined at least by a first wall and an opposing second wall. It may be that the first door is located closer to the first wall than the first door is located to the second wall. It may be that the third door is located closer to the second wall than the third door is located to the first wall. Advantageously, since the third door is located closer to the second wall than the third door is located to the first wall, the user must walk a substantial distance along the first region before being able to open the third door to enter the second region. It may be that the first door is biased towards a closed position. It may be that the third door is not openable until the first door is in the closed position. It may be that the distance between the first and third doors is such that, when the user enters the first region through the first door, the first door is configured to move into the closed position before the user is able to open the third door. In accordance with another aspect of the present invention, there is provided an apparatus for the storage and transportation of hazardous waste. The apparatus comprises a first region for entrance by a user. The first region is defined at least by a first wall and an opposing second wall. The first region comprises a first inlet configured to permit air to flow into the first region. The first region comprises a first outlet configured to permit air to flow out of the first region. The first region comprises a first door to an exterior of the apparatus. The first door is located closer to the first wall than the first door is located to the second wall. The first door is openable for a user to enter the first region. The apparatus comprises a second region for loading, storing and unloading the hazardous waste. The second region comprises a second door to an exterior of the apparatus. The second door is openable for unloading the hazardous waste. The apparatus comprises a third door between the first region and the second region. The third door is openable for loading the hazardous waste in the second region. The third door is located closer to the second wall than the third door is located to the first wall. The apparatus comprises an airflow control system configured to cause a first airflow, in a first portion of the first region, away from the first door and towards a second portion of the first region. In accordance with another aspect of the present invention, there is provided a method of operating an apparatus for the transportation of hazardous waste. The apparatus comprises a first region for entrance by a user. The first region is defined at least by a first wall and an opposing second wall. The first region comprises a first inlet configured to permit air to flow into the first region. The first region comprises a first outlet configured to permit air to flow out of the first region. The first region comprises a first door to an exterior of the apparatus. The first door is located closer to the first wall than the first door is located to the second wall. The first door is openable for a user to enter the first region. The apparatus comprises a second region for loading, storing and unloading the hazardous waste. The second region comprises a second door to an exterior of the apparatus. The second door is openable for unloading the hazardous waste. The apparatus comprises a third door between the first region and the second region. The third door is openable for loading the hazardous waste in the second region. The third door is located closer to the second wall than the third door is located to the first wall. The apparatus comprises an airflow control system. The method comprises causing, by the airflow control system, a first airflow, in a first portion of the first region, away from the first door and towards a second portion of the first region. The airflow control system may be the pressure control system described hereinbefore. The apparatus may be the container, e.g. the sealable transportable container described hereinbefore. Any of the features described hereinafter may be combined with any one or more of the aspects described hereinbefore unless inherently incompatible. It may be that the first and / or second regions are rooms which can be entered by a human and are sized so the user can walk into the region. The first and / or second regions may be corridors in that their depth is longer than their height and width. Each of the first and second regions may have a door for access into and out of the region. The first wall typically forms the front of the container. The second wall typically forms the rear of the container. By “front” we refer to the side of the container which faces the user when the user approaches the first door to enter the container. By “rear” we refer to the side of the container furthest away from the first wall. Where the container is a roll-on roll-off skip, it may be that the container is configured to be lifted from the rear (i.e. from the second wall) of the container to be pulled onto a transport vehicle. It may be that the first and second walls are parallel. It may be that the first and second walls defined both the first and second regions. Typically, the first and second walls are external container walls. Advantageously, since the first door is closer to the first wall than the third door is to the first wall, the user must enter the second region, from the first region, at a location that is at the rear region of the container. By “rear region” of the container, we refer to a region of the container which is closer to the second wall than the first wall. By “front region” of the container, we refer to a region of the container which is closer to the first wall than the second wall. The first door is typically located in the front region of the container. Therefore, the distance between the first door and the third door is such that the air inside the front region in the region in front of the first door is different to the air inside the rear region in the region in front the third door. Typically, the first and second regions are divided, e.g. defined, by a shared third wall. The third wall is typically interior to the container. It may be that the first and or second regions are defined by a further one or more walls which are either internal or external walls. In an example, the first region may be defined by the first wall, the second wall, the third wall and a fourth wall. In an example, the second region may be defined by the first wall, the second wall, the third wall and a fifth wall. In these examples, the fourth and fifth walls are different walls. Optionally, the first door is positioned on the first wall. Optionally, the first door is positioned on a lateral wall, such as the fourth wall in the above example. In any case, the shortest distance between the first door and the first wall may be less than the shortest distance between the first door and the second wall. By lateral, we refer to the walls extending between the first wall and the second wall. Typically, the second region is for storing the hazardous waste, which may be during transportation of the container. The second region may be sized so as to store the hazardous waste. It may be that the hazardous waste is stored in sealable (e.g. sealed) waste bags and the second region is configured to hold and store a plurality of sealable (e.g. sealed) waste bags. The second door typically opens outwards, away from the container. The second door is typically opened when it is desired to unload the hazardous waste from the container. The second door may typically be openable (e.g. pivotably hinged) along a horizontal axis. The second door may have a greater width than the first door. The second door may have a greater height than the first door. It may be that the second door is dimensioned so as to allow a plurality of sealable waste bags to be unloaded from the second region at one time. Typically, the second door is (un)lockable from the outside. The second door may be moveable from a closed position to an open position (and vice versa). It may be that the closed position refers to an extremity of the range of motion of the second door. It may be that the open position refers to the other extremity of the range of motion of the second door. The second door may be biased to the closed position, or at least closer to the closed position than the open position. The second door may be biased to the closed position by gravity. Typically, the third door is an internal door. It may be that the third door is positioned on the third wall from the example used above. It may be that the third door opens into the first region. The third door may typically be dimensioned to allow a human user to pass through the respective doorway when opened. By this we mean that the third door has a greater height than its width and may typically be openable (e.g. pivotably hinged) along a vertical axis. The third door may be released using controls on the side of the door facing the first region and / or the side of the third door facing the second region. The third door may be moveable from a closed position to an open position (and vice versa). It may be that the closed position refers to an extremity of the range of motion of the third door. It may be that the open position refers to the other extremity of the range of motion of the third door. The third door may be biased to a closed position, or at least closer to the closed position than the open position. Optionally, the third door is positioned on a shared internal wall defining the first and second regions. Optionally, the third door is positioned on the third wall from the hereinbefore example. In any case, the shortest distance between the third door and the second wall may be less than the shortest distance between the third door and the first wall. It may be that the hazardous waste is fibrous waste. It may be that the fibrous waste is asbestos. The container and method described herein is particularly helpful for the storage and transportation of hazardous waste because asbestos is known to contaminate air with which it comes into contact. Therefore, the container, having a controlled airflow away from the first door and a lower pressure inside the container than the exterior of the container, is particularly beneficial for preventing, or at least reducing, the risk of user exposure to air contaminated with asbestos. It may be that the hazardous waste comprises solid or liquid waste. It may be that the hazardous waste is solid or liquid waste. It may be that the hazardous waste is not a flammable gas. It may be that the hazardous waste is airborne in that it is carried by air. It may be that the hazardous waste comprises particles of between (inclusive of) 1 to 10 microns, 2 to 8 microns or 3 to 6 microns. Thus, particles of these sizes in the waste are easily carried by air, and particularly harmful to humans when breathed in, not least because such particles can be easily transported into the lungs. It may be that the first air outlet is between the first region and the second region. It may be that the pressure control system is configured to cause the first airflow to move, through the first air outlet, from the first region to the second region. It may be that method comprises causing, by the pressure control system, the first airflow to move, through the first air outlet, from the first region to the second region. Advantageously, the first airflow leaves the first region through the first air outlet. This means that air from the first region, which is entered by the user, is moved away from the door. This prevents the build-up of stagnant air in the first region. Typically, the first air outlet is provided in the third wall which divides the first and second regions. It may be that the pressure control system is configured to cause the first airflow to move through the first air outlet by operating the airflow generator to direct air through the first air outlet. In another example, the first air outlet may outlet the air directly to an exterior of the container. In such an embodiment, the pressure control system may be configured to, or the method may comprise causing, by the pressure control system, the first airflow to move, through the first air outlet, out of the container. It may be that the first air inlet is between the exterior of the container and the first region. It may be that the pressure control system is configured to cause a second airflow to move through the first air inlet. It may be that the first air inlet is between the exterior of the container and the first region. It may be that the method comprises causing, by the pressure control system, a second airflow to move through the first air inlet. Advantageously, the first air inlet between the exterior of the container and the first region draws in air from the exterior of the container, which replenishes the air in the first region (i.e., near the first door) with cleaner air from the exterior of the container. In the arrangement where air is not continuously circulated inside the container, fresh air is drawn in to replace the air which leaves the container. Therefore, by providing a second airflow to replace the air of the first airflow which moves away from the first door, clean air is provided in its place. By pulling in air through the air inlet, the existing air in the first region is displaced, thereby preventing, or at least reducing, a build-up of contaminated air near the first door. The first air inlet typically draws in fresh air from outside of the container into the first region. The second airflow may be the movement of air into the first region from the exterior of the container. The first air inlet may be positioned on the first wall of the container, i.e. at the front of the container. It may be that the first air inlet is provided in the first portion of the first region. It may be that the first air outlet is provided on a lateral wall of the container in the front half of the container in the first region. It may be that the pressure control system is configured to cause the second airflow to move through the first air inlet by operating the airflow generator to direct air through the first air inlet. It may be that the container comprises a second air inlet configured to permit air to flow into the second region. It may be that the pressure control system is configured to cause a third airflow to move, through the second air inlet, from the exterior of the container into the second region. It may be that the container comprises a second air inlet configured to permit air to flow into the second region. It may be that the method comprises causing, by the pressure control system, a third airflow to move, through the second air inlet, from the exterior of the container into the second region. Advantageously, the provision of an airflow from the exterior of the container into the second region allows for the air inside the second region, to be displaced and replenished with fresher air from the exterior of the container. The air inside the second region becomes contaminated when the hazardous waste is stored in the second region. When the third door between the first and second regions is opened to allow the user to enter and leave the second region, air from the second region can move through this doorway into the first region. Contaminated air from the second region is prevented from building up in front of the first door because of the first airflow which is directed away from the first door. It may be that the second air inlet is an aperture which allows air to move into the second region. The second air inlet typically draws in fresh air from outside of the container into the second region. The third airflow may be the movement of air into the second region from the exterior of the container. The second air inlet may be positioned on the first or second wall of the container, i.e. either at the front or the rear of the container. It may be that the second air inlet is provided in the second region. It may be that the second air inlet is provided on a lateral wall of the container. It may be that the pressure control system is configured to cause the third airflow to move through the second air inlet by operating the airflow generator to direct air through the second air inlet. It may be that the second air inlet is covered by horizontal slats (i.e. louvres) which are moveable to open and close the second air inlet. It may be that the louvres are selfclosing louvres. It may be that the louvres are passive self-closing louvres. The louvres may typically open when the pressure control system is activated. Typically, the louvres on the second air inlet may be configured to be opened by applying suction thereto from within the container. In other words, the louvres may be hingedly mounted at an inner side of the second air inlet, hinged at an upper side of each louvre. Thus, suction will cause the louvres to open and permit airflow through the second air inlet into the container. Without sufficient suction, the louvres will not be caused to open, and the air within the container will be unable to pass out of the container through the second air inlet. In this way, when the pressure control system is not activated, and any other inlets or outlets or external doors are also closed, the container can be considered to be sealed. When the pressure control system is operating, the second region will be under a lower pressure than the ambient pressure external to the container, thereby preventing egress of contaminated air through the second air inlet. It may be that the container comprises a second air outlet configured to permit air to flow out of the second region. It may be that the pressure control system is configured to cause a fourth airflow to move, through the second air outlet, from the second region to the pressure control system. It may be that the container comprises a second air outlet configured to permit air to flow out of the second region. It may be that the method comprises causing, by the pressure control system, a fourth airflow to move, through the second air outlet, from the second region to the pressure control system. Advantageously, the second air outlet provides a controlled path for contaminated air from the second region to exit the second region. Instead of exiting the second region through the doorway when the third door is open, the contaminated air leaves the second region through the second air outlet in the fourth airflow. It may be that the second air outlet is an aperture which allows air to move out of the second region. The second air outlet typically moves air from the second region, which is contaminated air, into the pressure control system. The pressure control system may comprise an air duct which is connected to the second air outlet and receives the fourth airflow from the second region. The second air outlet may be positioned on the wall between the first and second regions, i.e. the third wall in the example provided above. The second air outlet is typically provided at a part of the dividing wall between the first and second regions closer to the second wall than the first wall. In this way, the contaminated air from the second region enters the first region away from the first door. It may be that the pressure control system is configured to cause the fourth airflow to move through the second air outlet by operating the airflow generator to direct air through the second air outlet. It may be that the pressure control system comprises an airflow generator positioned on a third air outlet. It may be that the pressure control system comprises a filter. It may be that the third air outlet is configured to permit air to flow from the pressure control system to the exterior of the container. It may be that the pressure control system is configured to cause a fifth airflow to move, through the third air outlet, from the pressure control system to the exterior of the container. It may be that the pressure control system comprises an airflow generator positioned on a third air outlet and a filter. It may be that the third air outlet is configured to permit air to flow from the pressure control system to the exterior of the container. It may be that the method comprises causing, by the pressure control system, a fifth airflow to move, through the third air outlet, from the pressure control system to the exterior of the container. Advantageously, provision of an airflow generator positioned on a third air outlet is a particularly effective way of generating the airflows through the container and the reduced pressure of the container compared to outside of the container. Advantageously, the fifth airflow, which includes the contaminated air from the second region, is directed out of the container. This provides a controlled release of air into the exterior of the container. The filter filters out contaminants from the air before it is provided to the exterior of the container. In this way, the contaminated air inside the container is cleaned before it passes through the third air outlet to the exterior of the container. The filter may be a HEPA filter. It may be that the filter is replaced and / or cleaned from time to time to maintain effective operation of the container. Since the first airflow moves air from the first region into the second region through the first air outlet, the fifth airflow includes the air from the first region. Thus, an overall airflow path may be defined through the container. In particular, air is drawn into container through the first air inlet (into the first region) and into the second air inlet (into the second region). Air in the first region is drawn into the second region through the first air outlet. The contaminated air from inside the second region is drawn out of the second region through the second air outlet, into an air duct of the pressure control system. Finally, the contaminated air is cleaned and directed through the third air outlet of the pressure control system. It may be that the airflow generator is a fan. It may be that the pressure control system controls a fan speed of the fan. It may be that the pressure control system comprises a power source, e.g. battery or mains powered, to power the fan. The airflow generator may be configured to cause a maximum air flow rate of at least 1,000 litres of air per minute to be drawn through the container. The maximum air flow rate may be at least 3,000 litres per minute. The maximum air flow rate may be less than 20,000 litres per minute. The maximum airflow rate may be less than 10,000 litres per minute. It may be that the pressure control system is operable in dependence on at least one user input. It may be that the container comprises one or more user input devices to receive the at least one user input. It may be that the method comprises operating the pressure control system in dependence on at least one user input. Advantageously, the pressure control system is operated when required by the user. This reduces power consumption and is therefore more energy efficient than leaving the pressure control system running continuously. Typically, the at least one user input comprises at least one of: a physical input, an audio input, and a gesture. It may be the physical input comprises physical manipulation of an input device. It may be the audio input comprises a spoken command. It may be that the gesture comprises a hand motion. It may be that operating the pressure control system comprises at least one of: activating the pressure control system, activating the airflow generator, maintaining operation of the airflow generator at a constant fan speed, increasing the fan speed and decreasing the fan speed. Typically, when the first user input is received, a control signal is transmitted by the pressure control system to control the airflow generator. Typically, the one or more user input devices comprise at least one of: a button, a dial, a switch, a touchscreen, a microphone, a camera or a motion sensor. However, it will be appreciated that other types of user input devices will be envisaged. It may be that the container comprises a sensor configured to determine whether a condition associated with the container is met. It may be that the pressure control system is operable in dependence on the condition associated with the container being met. It may be that the method comprises determining whether a condition associated with the container is met. It may be that the method comprises operating the pressure control system in dependence on the condition associated with the container being met. It may be that the method comprises operating the pressure control system for a predetermined time period after the condition associated with the container is met. Advantageously, the pressure control system is operated as required, and particularly according to the condition being met. Therefore, this arrangement further reduces power consumption and is therefore more energy efficient than leaving the pressure control system running continuously. Typically, the sensor may be configured to measure a parameter associated with the container. Typically, the measured parameter may be compared to a predetermined threshold value to determine whether the condition is met Typically, when it is determined that the condition is met, a control signal is transmitted by the pressure control system. It may be that the condition is one or more of: whether the first door has been opened, whether the third door has been opened, whether a user is present in the first region, whether a user is present in the second region and whether the first door has been unlocked. It may be that the condition is associated with a person leaving the container, such as the first door closing (and optionally no motion within the container being detected). It may be that the pressure control system is operated for a predetermined time period after the condition associated with the container is met. It may be that the sensor is at least one of: a motion detector, a presence detector and a door sensor. Advantageously, the pressure control system is configured to maintain operation for a predetermined time period after the condition is met so that airflow continues beyond when the requirement is met. This can be advantageous because it allows the condition being met to function as a trigger for operation of the pressure control system to cause the first airflow, and then for the pressure control system to continue this operation fora predetermined time period, i.e. then independent of the condition being met. Optionally, the condition associated with the container is a trigger to begin the predetermined time period. It may be that the pressure control system is configured to maintain the airflow generator operation for the predetermined time period. It may be that the pressure control system operates for the predetermined time period in a shut-down mode which may be a predetermined control cycle for the airflow generator. For example, the fan speed may progressively reduce over a 2 minute period. Typically, the predetermined time period is at least 5 seconds, at least 10 seconds, at least 20 seconds, at least 30 seconds, at least 60 seconds, at least 120 seconds or at least 300 seconds. Advantageously, the sensors are able to determine when a user has entered and / or exited the container. This means that the pressure control system causes the first airflow at a time when the flow of contaminated air away from the first door is particularly important because a user is accessing the container meaning that there is a potential for contaminated air built up in front of the first door to escape. Typically, the sensor is able to determine the user’s presence in one or both of the first and second region. Typically, the sensor is able to determine whether at least one of the doors of the container is in the closed or open position. It may be that the sensor is a camera which captures image or video data that is used to detect motion of a user and / or a door. It may be that the second door is lockable and configured to be unlocked by a door release mechanism. The door release mechanism may comprise: a door release user control located away from the second door and a door lock coupled to the door release user control. The door lock and the door release user control may be mechanically connected to one another. Advantageously, the door release user control is located away from the second door because the second door is used for unloading the hazardous waste and therefore when this second door is open, contaminated air is released through this doorway. It is desirable to provide a distance between the location where the user needs to be positioned to unlock the second door and the opening of the second door so that the user is located at a safe distance away from the contaminated air. Similarly, as the hazardous waste is unloaded through the second door, when the user is located further away from the opening of the unloading door, there is less chance of the user coming into contact with the hazardous waste material. That is, it may be that the door release mechanism is remote from the second door. Typically, the third door may be unlocked using the door lock, which optionally may be a mechanical door lock. Typically, the door release user control may be accessible to the user from the exterior of the container. It may be that the door release user control is located on an exterior wall of the container. It may be that the second door is located on a wall of the container. It may be that the door release user control is located on the container at a location other than on the wall on which the second door is located. It may be that the door release mechanism comprises a door linkage to couple the door release user control to the door lock. It may be that the door release user control is located at least 1 meter away from the second door. Advantageously, by providing the door release user control on a different wall of the container to the second door, the distance between the doorway of the second door and the user’s position when unlocking that door is increased. This again reduces the possibility of the user being exposed to contaminated air. It may be that the second door is located on the first wall. Therefore, the door release user control is located on a wall of the container other than the first wall. For example, the door release user control may be located on a lateral external wall of the container. It may be that the door lock and the door release user control are mechanically connected to one another by way of a door linkage. The door linkage may typically couple motion from the door release user control, caused by the user, to physical unlocking of the door lock of the third door. Typically, the door release user control is located at least 1.5 m, at least 2m or at least 2.5m from the second door. The door release user control may be located on a lower region of the container such that it is easily accessible by a user. By “lower” region, we refer to the part of the container closer to the base than to the roof. It may be that the container comprises a base and a roof. It may be that the second door is located on a wall of the container and is opened by rotation about a pivot having an axis of rotation extending parallel to a first edge of the container. It may be that the first edge of the container corresponding to the intersection between the roof and the wall on which the second door is located. It may be that the axis of rotation and the first edge are within 0.5m of one another. Advantageously, the second door is pivotable about an axis extending parallel to the roof and above the opening of the container covered by the second door to minimise the amount the second door is required to open in order to unload the hazardous waste from the second region. A door opening by rotation about the vertical axis is required to open to a fairly large angle in order to unload the waste in the second region, which is typically done by tilting the container towards the second door. In contrast, when the door is openable by a rotation along a horizontal axis, the door does not need to open to as great an angle because the waste can slide along the floor of the second region. Furthermore, the door will be biased closed by gravity when hinged at the upper end of the door with a horizontal hinge axis. The base and roof may be opposing walls of the container in the vertical direction. Typically, the base of the container is the surface walked on by the user when inside the container. It may be that the second door is located on the first wall. Typically, the second door may be hingedly pivotable about the axis of rotation. The axis of rotation may be offset from the roof of the container. It may be that the axis of rotation and the first edge are within 0.5m, within 0.3m or with 0.15m of one another. It may be that the first edge is the edge between the roof and the front wall of the container. It may be that the second door is an outwardly opening door. It may be that second door is hinged about a horizontal axis. The horizontal axis may be offset from the roof of the container. It may be that the method comprises opening the first door. The method may comprise entering the first region. The method may comprise closing the first door. The method may comprise opening the third door. The method may comprise loading the hazardous waste material in the second region. The method may comprise exiting the first region through the first door. The method may further comprise, after loading the hazardous waste material in the second region, and before exiting the first region through the first door, exiting the second region into the first region through the third door, and optionally, closing the third door. Typically, the user may enter the first region through the first door. It may be that the pressure control system operates in dependence on detection from a sensor that the first door has been opened, and optionally in dependence on detection from a sensor that the user is present within the container. It may be that the pressure control system operates in dependence on a user input provided by the user when they enter the first region. It may be that the method comprises the user moving through the first region to the third door between the first and second regions. It may be that the method comprises the user entering the second region. It may be that the method comprises the user walking through the second region towards the third door. It may be that the user places the hazardous waste so as to load the second region from the first wall to the second wall (i.e. from front to back). Typically, the waste is loaded in waste bags. Advantageously, this means that the container is loaded with hazardous waste from front to back, which means that the side nearest the second door (i.e. the unloading door) is filled up first. This is beneficial because, when the container is tilted (either for loading onto the transport vehicle and / or when being emptied), the hazardous waste is close to the second door (which is closer to the pivot point around which the container is tilted) and is subject to less movement, which reduces the chance of the hazardous waste being exposed (e.g. tearing of the bag in which the hazardous waste is sealed). Advantageously, when the container is loaded onto a transport vehicle (e.g. using rollon, roll-off loading), the bags of waste do not move (e.g. roll) around in the second region because the waste bags are loaded from front to back (i.e. the side closest to the second door is loaded first). Therefore, the risk of the bags of waste being split open at the start of transportation, when being loaded onto the transport vehicle, is reduced. It may be that the method comprises opening the second door. The method may comprise unloading the hazardous waste from the second region. It may be that the method comprises closing the second door. It may be that unloading the hazardous waste from the second region comprises tilting the container so the hazardous waste tips or rolls out of the second region. Description of the Drawings An example embodiment of the present invention will now be illustrated with reference to the following Figures in which: Figure 1 is a plan view of a schematic of a container according to an aspect of the present invention; Figure 2 shows a schematic of an exterior side wall of a container according to an aspect of the present invention; Figures 3a and 3b are a schematic of front and rear exterior walls of a container according to an aspect of the present invention; Figure 4 is a schematic illustration of a controller of a container in accordance with an aspect of the present invention; Figure 5 is a flowchart of a method according to an aspect of the present invention; Figure 6 is a schematic of airflow in the container in accordance with an aspect of the present invention; Figure 7 is a flowchart of a method according to an aspect of the present invention; Figures 8a and 8b are a cross-section along line A-A’ of a schematic of a container according to an aspect of the present invention; Figure 9 is a flowchart of a method according to an aspect of the present invention; and Figures 10a and 10b are a cross-section along line B-B’ of a schematic of a container according to an aspect of the present invention. Detailed Description of an Example Embodiment Figures 1 illustrates a plan view of a schematic of a container 100 according to an aspect of the present invention. Figures 3a and 3b are a schematic of front 104 and rear 102 exterior walls of a container 100 according to an aspect of the present invention. The container 100 is defined by four exterior walls, including a front wall 104, a rear wall 102 and two side walls 106, 108. The container 100 is divided into two regions, a corridor 110 and a storage region 112, by an interior wall 114 which extends through the entire length of the container 100. The storage region 112 is used to store waste material, such as hazardous waste material, typically fibrous waste, such as asbestos. The container 100 also has a negative pressure unit 122, which functions as the pressure control system. The negative pressure unit 122 comprises a pressure unit outlet 124, which functions as the third air outlet discussed above. The outlet 124 of the negative pressure unit 122 allows air to leave the container 100. In front of the outlet 124 is a filter 126 and a fan 128, which functions as the airflow generator discussed above. The filter 126 is a HEPA filter in this example, though other types of filters will be envisaged. The corridor 110 has an external entry door 116 on the front wall 104 and an internal door 118. The internal door 118 is used to move between the corridor 110 and the storage region 112. The internal door 118 is shown in dashed lines in Figure 1 because it is located beneath the negative pressure unit 122. The storage region 112 also has an external unloading door 120, which is opened when the storage region 112 is being unloaded. Air is drawn into the corridor 110 through a corridor air inlet 130, functioning as the first air inlet discussed above. The corridor air inlet 130 is shown on the side wall 108 but could be located elsewhere, e.g. on the front wall 104. Air is drawn into the storage region 112 through a storage region air inlet 132, functioning as the second air inlet discussed above. The storage region air inlet 132 is shown on the side wall 106 but could be located elsewhere, e.g. on the front wall 104. Air is also drawn into the storage region 112 from the corridor 110, through a corridor air outlet 134, functioning as the first air outlet discussed above. Air is drawn out of the storage region 112, into the negative pressure unit 122, through a storage region outlet 136, functioning as the second air outlet discussed above. As shown on Figure 3b, the rear wall 102 has a beam 148, which functions as the attachment member discussed above. When the container 100 is moved or unloaded, a hook is hooked onto the beam 148, as will be shown further below. The container 100 includes a pressure sensor 150 which detects when the entry door 116 is open and transmits a control signal to the negative pressure unit 122 to activate the fan 128 to lower the pressure inside the unit. The container 100 also includes a dial 152, which is on the dividing wall 114, and can be used by the user to change the pressure inside the container 100. Figure 2 shows a schematic of an exterior side wall 106 of a container 100 according to an aspect of the present invention. On the side wall 106, there is a door release mechanism made up of a lever 140, functioning as the door release user control discussed above, and a door lock 142, which are coupled to one another by the door linkage 144. To open the unloading door 120, the user pulls the lever 140 down and the door linkage 144 translates the lever actuation into motion to unlock the door lock 142. The unloading door 120 opens about a pivot positioned above the unloading door 120 which has a horizontal axis of rotation 176, as will be shown in more detail below. Figure 4 is a schematic illustration of a controller 400 in accordance with an aspect of the present invention. The controller 400 is part of the negative pressure unit 122. The controller 400 comprises one or more processors 410 and a non-transitory computer readable memory 420. The non-transitory computer readable memory 420 stores instructions which, when executed by the one or more processors 410, causes operation of the methods described herein. The controller 400 exchanges data and / or control signals 430 with the fan 128. Figure 5 illustrates a flowchart of a method 500 in accordance with an aspect of the present invention. The method 500 will be described with reference to Figure 6 which is a schematic of airflow in the container 100. The method 600 comprises activating the fan 128 to cause 510 a first airflow 158 away from the entry door 116, which is not labelled on Figure 6 because it is closed. In particular, the first airflow 158 is in a direction from the first portion 154 of the corridor 110 to a second portion 156 of the corridor 110 which is further away from the entry door 116. The first and second portions 154, 156 of the corridor 110 are shown using dashed lines in Figure 6. The exact boundaries of the first and second portion 154,156 of the corridor 110 can vary and the dashed lines in Figure 6 are merely intended to provide an example. However, the first portion 154 of the corridor 110 is in front of the entry door 116 and the second portion 156 of the corridor 110 is further away, i.e. further along the corridor 110 than the first portion 154. The arrangement of the container 100 and activation of the fan 128 causes 520 the first airflow 158 to also pass through the corridor air outlet 134, thereby drawing air into the storage region 112. A second airflow 160 is also caused 530 by the fan 128 and the corridor air inlet 130. In this way, external air is drawn through the corridor air inlet 130 into the corridor 110 to replace the air in the first portion 154 of the corridor 110 with fresher, cleaner air. As this air moves through the corridor 110, it too is drawn into the storage region 112 through the corridor air outlet 134 as part of the first airflow 158. External air is also drawn into the storage region 112 through the storage region air inlet 132 as part of the third airflow 162 which is again caused 540 by the rotation of the fan 128. Air from the first and third airflows 158,162 passes through the storage region 112 and approaches the rear of the storage region 112. This air then is drawn through the storage region air outlet 136 as part of the fourth airflow 164 caused 550 by the fan 128. The fourth airflow 164 draws air into the negative pressure unit 122. The air in the negative pressure unit 122 is caused 560 to be pushed out of the pressure unit outlet 124 as part of the fifth airflow 166 and is filtered by the filter 126 before it is released to the external environment. Therefore, using the above mechanism, clean air from the exterior of the container 100 is drawn into the container 100, becomes contaminated in the storage region 112 and is cleaned by the filter 128 in the negative pressure unit 122 before being released back to the exterior of the container 100. As shown by the dashed boxes in the flowchart of Figure 5, the method steps 510 to 560 may be initiated when a user input is received 505a, or when it is determined 505b that a condition is met. In the latter case, the method steps 510 to 560 are performed 565b until a predetermined time period, after the user input is received, expires. Figure 7 illustrates a flowchart of a method 700 in accordance with an aspect of the present invention. The method 700 will be described with reference to Figures 8a and 8b are cross-sections along line A-A’ of a schematic of the container 100 according to an aspect of the present invention. The method 700 is a method of a user 180 loading waste 182 into the container 100, in particular the storage region 112. The user 180 opens 710 the entry door 116 and enters 720 the corridor 110. As soon as the pressure sensor 150 detects that the entry 116 is being opened, the negative pressure unit 122 may automatically activate to generate the airflows shown in Figure 6. The user 180 walks along the corridor 110 towards the internal door 118 which provides access to the storage region 112. As the user 180 walks along the corridor 110, the entry door 116 self-closes. The mechanism of the self-closing entry door is preconfigured to take a predetermined amount of time to close. The predetermined amount of time is based on being less than the time it takes an average user to walk from the entry door 116 to the internal door 118. Therefore, when the user 180 reaches the internal door 118, the entry door 116 is closed. The user 180 opens 740 the internal door 118 and enters the storage region 112. The internal door 118 may be self-closing, or the user 180 may need to close the internal door 118 behind them. Since the storage region 112 is loaded from front to back, when the storage region 112 is empty, the user 180 must walk from the internal door 118 to the unloading door 120. The user 180 places 740 the waste bags 182 by the unloading door 120 and walks back on themself to the internal door 118. The user 180 then leaves the storage region 112 through the internal door 118 and walks back down the corridor 110 towards the entry door 116. The user 180 opens and exits 750 the corridor through the entry door 116, which then self-closes. The negative pressure unit 122 remains in operation on a timer for a predetermined period, e.g. five minutes. Figure 9 is a flowchart of a method 900 according to an aspect of the present invention. The method 900 will be described with reference to Figures 10a and 10b which are cross-sections along line B-B’ of a schematic of the container 100 according to an aspect of the present invention. In the method 900, the unloading door 120 is opened 910 using the lever 140 which unlocks the door lock 142. The door lock 142 holds the unloading door 120 in a closed position by pulling the unloading door 120 closer to the container front wall 104 than when the unloading door 120 is in its natural hanging position. The unloading door 120 opens by rotating about a horizontal axis 176 which runs in the direction into and out of the page through pivot point 174. The pivot point 174 is above and slightly in front of the unloading door 120 and the roof 170 which means that the natural hanging position of the unloading door 120 is slightly away from the front wall. The container 100 is connected to a hook 178 of an unloading vehicle (not shown) via the beam 148 to which the hook 178 attaches. The hook 178 is raised to tilt the container 100 by pulling the rear end of the container 100 upwards. The unloading door 120 continues to hang naturally as the space between the front wall 104 and the unloading door 120 increases. As a result, the waste bags 182a, 182b, 182c, 182d can slide of the storage region 112 to unload 920 the hazardous waste. Since the waste is near the front wall 104, the waste does not need to roll or slide too far along the base 172 of the storage region 112, which reduces the chances of the waste bags 182a-182d ripping. The hook 178 then lowers the container 100 back towards the horizontal and the unloading door is subsequently closed 930 and the locked using the door lock 142. In summary, there is provided a sealable transportable container (100) comprising: a first region (110) for entrance by a user through a first door (116); a first air inlet (130) configured to permit air to flow into the first region therethrough; a first air outlet (134) configured to permit air to flow out of the first region therethrough; and a pressure control system (122) configured to cause a first airflow (158), in a first portion (154) of the first region, away from the first door and towards a second portion (156) of the first region, the first airflow from the first air inlet to the first air outlet, to thereby generate a lower pressure inside the container than the pressure of the exterior of the container. Throughout the description and claims of this specification, the words “comprise” and “contain” and variations of them mean “including but not limited to”, and they are not intended to and do not exclude other components, integers, or steps. Throughout the description and claims of this specification, the singular encompasses the plural unless the context otherwise requires. In particular, where the indefinite article is used, the specification is to be understood as contemplating plurality as well as singularity, unless the context requires otherwise. Features, integers, characteristics, or groups described in conjunction with a particular aspect, embodiment, or example of the invention are to be understood to be applicable to any other aspect, embodiment or example described herein unless incompatible therewith. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and / or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and / or steps are mutually exclusive. The invention is not restricted to the details of any foregoing embodiments. The invention 1 extends to any novel one, or any novel combination, of the features disclosed in this 2 specification (including any accompanying claims, abstract and drawings), or to any 3 novel one, or any novel combination, of the steps of any method or process so 4 disclosed. 5 6

Claims

1. A sealable transportable container comprising:a first region for entrance by a user through a first door;a first air inlet configured to permit air to flow into the first region therethrough;a first air outlet configured to permit air to flow out of the first region therethrough; anda pressure control system configured to cause a first airflow, away from the first door and towards the first air outlet, to thereby cause a lower pressure inside the container than an ambient pressure outside the container.

2. The sealable transportable container of claim 1, wherein the sealable transportable container is for the storage and transportation of hazardous waste, the sealable transportable container further comprising:a second region for loading, storing and unloading the hazardous waste, the second region comprising a second door to an exterior of the container, wherein the second door is openable for unloading the hazardous waste; anda third door between the first region and the second region, wherein the third door is openable for loading the hazardous waste in the second region.

3. The sealable transportable container according to claim 2, wherein the first air outlet is between the first region and the second region, and the pressure control system is configured to cause the first airflow to move, through the first air outlet, from the first region to the second region.

4. The sealable transportable container according to any preceding claim, wherein the first air inlet is between the exterior of the container and the first region, and the pressure control system is configured to cause a second airflow to move through the first air inlet.

5. The sealable transportable container according to claim 2 or any claim dependent thereon, comprising a second air inlet configured to permit air to flow into the second region, and wherein the pressure control system is configured to cause a third airflow to move, through the second air inlet, from the exterior of the container into the second region.

6. The sealable transportable container according to claim 2 or any claim dependent thereon, comprising a second air outlet configured to permit air to flow out of the second region, and the pressure control system is configured to cause a fourth airflow to move, through the second air outlet, from the second region to the pressure control system.

7. The sealable transportable container according to any preceding claim, wherein the pressure control system comprises an airflow generator positioned at a third air outlet and a filter, the third air outlet configured to permit air to flow from the pressure control system to the exterior of the container, and wherein the pressure control system is configured to cause a fifth airflow to move, through the third air outlet, from the pressure control system to the exterior of the container.

8. The sealable transportable container according to any preceding claim, wherein the pressure control system is operable in dependence on at least one user input and the container comprises one or more user input devices to receive the at least one user input.

9. The sealable transportable container according to any preceding claim, wherein the container comprises a sensor configured to determine whether a condition associated with the container is met, and wherein the pressure control system is operable in dependence on the condition associated with the container being met.

10. The sealable transportable container according to claim 9, wherein the pressure control system is configured to be operated for a predetermined time period after the condition associated with the container is met, optionally, wherein the sensor is at least one of: a motion detector, a presence detector and a door sensor.

11. The sealable transportable container according to claim 2 or any claim dependent thereon, wherein the second door is lockable and configured to be unlocked by a door release mechanism, the door release mechanism comprising: a door release user control located away from the second door and a door lock coupled to the door release user control, optionally, wherein the doorlock and the door release user control are mechanically connected to one another.

12. The sealable transportable container according to claim 11, wherein the second door is located on a wall of the container and the door release user control is located on the container at a location other than on the wall on which the second door is located, wherein the door release mechanism comprises a door linkage to couple the door release user control to the door lock, optionally wherein the door release user control is located at least 1 meter away from the second door.

13. The sealable transportable container according to claim 2 or any claim dependent thereon, wherein the container comprises a base and a roof and wherein the second door is located on a wall of the container and is opened by rotation about a pivot having an axis of rotation extending parallel to a first edge of the container, the first edge of the container corresponding to the intersection between the roof and the wall on which the second door is located, wherein the axis of rotation and the first edge are within 0.5m of one another.

14. The sealable transportable container according to claim 2 or any claim dependent thereon, wherein the first region is defined at least by a first wall and an opposing second wall and the first door is located closer to the first wall than the first door is located to the second wall and wherein the third door is located closer to the second wall than the third door is located to the first wall.

15. The sealable transportable container according to claim 2 or any claim dependent thereon, wherein at least one of:the container has a width of at least 1 meter, a height of at least 1.5 meters and a depth of at least 4 meters;the container comprises an attachment component for connecting the container to a transport vehicle; andthe hazardous waste is fibrous waste, optionally the fibrous waste is asbestos.

16. A method of operating a sealable transportable container, the sealable transportable container comprising:a first region for entrance by a user through a first door,a first air inlet configured to permit air to flow into the first region therethrough,a first air outlet configured to permit air to flow out of the first region therethrough, anda pressure control system, wherein the method comprises:causing, a first airflow, away from the first door and towards the first air outlet, to thereby cause a lower pressure inside the container than an ambient pressure outside the container.

17. The method of operating a sealable transportable container according to claim16, wherein the container comprises:a second region for loading, storing and unloading the hazardous waste, the second region comprising a second door to an exterior of the container, wherein the second door is openable for unloading the hazardous waste; anda third door between the first region and the second region, wherein the third door is openable for loading the hazardous waste in the second region, and optionally wherein the method comprises:causing, by the pressure control system, the first airflow to move, through the first air outlet, from the first region to the second region.

18. The method of operating a sealable transportable container according to claim 16 or claim 17, wherein the first air inlet is between the exterior of the container and the first region, and the method comprises causing, by the pressure control system, a second airflow to move through the first air inlet.

19. The method of operating a sealable transportable container according to claim 17 or any claim dependent thereon, wherein the container comprises a second air inlet configured to permit air to flow into the second region, and the method comprises causing, by the pressure control system, a third airflow to move, through the second air inlet, from the exterior of the container into the second region.

20. The method of operating a sealable transportable container according to claim 17 or any claim dependent thereon, wherein the container comprises a second air outlet configured to permit air to flow out of the second region, and themethod comprises causing, by the pressure control system, a fourth airflow to move, through the second air outlet, from the second region to the pressure control system.

21. The method of operating a sealable transportable container according to any of claims 16 to 20, wherein the pressure control system comprises an airflow generator positioned at a third air outlet and a filter, the third air outlet configured to permit air to flow from the pressure control system to the exterior of the container, and wherein the method comprises causing, by the pressure control system, a fifth airflow to move, through the third air outlet, from the pressure control system to the exterior of the container.

22. The method of operating a sealable transportable container according to any of claims 16 to 21, comprising operating the pressure control system in dependence on at least one user input.

23. The method of operating a sealable transportable container according to claim 22, comprising determining whether a condition associated with the container is met, and operating the pressure control system in dependence on the condition associated with the container being met, optionally wherein the method comprises operating the pressure control system for a predetermined time period after the condition associated with the container is met.

24. The method of operating a sealable transportable container according to claim 17 or any claim dependent thereon, comprising:opening the first door;entering the first region, optionally closing the first door;opening the third door;loading the hazardous waste material in the second region; and exiting the first region through the first door.

25. The method of operating a sealable transportable container according to claim 17 or any claim dependent thereon, comprising:opening the second door;unloading the hazardous waste from the second region; andclosing the second door.34

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