Section 4.4.7.
Controlling non-ducted dust emissions


Subsection 4.4.7.1.
General provisions


Article 4.4.7.1.1.

§ 1.

The operator shall take measures to keep the dust emissions caused by the storage of dust-producing substances and by establishments in which dust-producing substances are transported or treated as low as possible.

 

The measures shall take into account the type and characteristics of the dust-producing substances or their components, the (un)loading installations and method, the mass flow rate, the meteorological conditions, faults in establishments and the location of the loading or unloading point. Safety aspects shall also be taken into consideration.

 

§ 2.

Technical establishments that may cause dust emissions and establishments for the reduction of dust emissions shall be maintained and inspected in good time to minimise dust emissions. Dust filters shall be replaced in good time to ensure proper operation.

 

§ 3.

From 1 January 2014, the operator must have procedures and instructions for controlling non-ducted dust emissions available for its own personnel and for the personnel of third parties engaged in activities at the establishment with a potential impact on dust emissions.

 

§ 4.

Spilled materials that could lead to the formation of dust shall be removed as quickly as possible at the end of the operation.


Subsection 4.4.7.2.
Special provisions


Article 4.4.7.2.1.

Dust-producing substances are classified into dust categories in Appendix 4.4.7.1 on the basis of the dust sensitivity of the substance and the possibility of countering the production of dust, possibly by wetting. The different dust categories are:

SC1: dust-sensitive, not wettable;

SC2: dust-sensitive, wettable;

SC3: barely dust-sensitive;

 

The minister may supplement or amend Appendix 4.4.7.1.

 

 

 

From 1 January 2014, the operator shall determine the dust category itself on the basis of the classification of comparable substances in Appendix 4.4.7.1 with regard to dust sensitivity or on the basis of a specifically developed test if:

 

a substance is classified in the table in Appendix 4.4.7.1, but the physicochemical properties during its stay on the site are constantly such that it belongs in a different dust category. The operator shall keep the dust category and the reasons for it available for the supervisory body;

the substance is not classified in the table in Appendix 4.4.7.1. The operator shall establish the dust category and the reason for it before the goods are received and keep the information available for the supervisory body. If, on receipt of the goods, it appears that they belong to a different dust category from what was expected, the operator shall immediately take the necessary measures to minimise dust emissions.

 

 

 

 

 


Article 4.4.7.2.2.

Dust-producing substances in dust category SC1 shall be stored in an enclosed storage facility or covered with fine-mesh nets or tarpaulins. If the substances are covered, appropriate measures shall be taken to counter dust emissions during filling and when excavating the storage pile.

 

The number of openings in an enclosed storage facility shall be as low as possible. The openings shall be as small as possible. Non-functional openings shall be closed. Functional openings in the enclosed storage facility shall be kept closed as much as possible. When filling or emptying an enclosed storage facility, the transfer points shall be placed as far away as possible from the openings.


Article 4.4.7.2.2bis.

Silos for the storage of dust-producing substances in dust categories SC1 and SC2 shall be fitted with a dust extraction system. An emission limit value for dust of 10 mg/Nm³ shall apply.

 


For establishments licensed before 1 July 2014, this provision shall apply from 1 July 2017.


Article 4.4.7.2.3. Translation not available

Article 4.4.7.2.4. Information on maintenance actions for the technical installations stated in Article 4.4.7.1.1, §2 shall be maintained and kept available for inspection by the supervisory body.

Article 4.4.7.2.5.

§ 1.

If dust-producing substances in dust categories SC2 and SC3 are stored in the open, dust diffusion shall be limited as far as possible by wetting the dust-producing substances. Provided the characteristics of the site and the fixed establishments allow it, the following measures shall also be taken:

provide the storage site with wind reduction screens;

an outer wall or a natural screen;

gather the stored volume into as few piles as possible;

choose the gradient of the piles such that the top layer does not slide off.

 

Point 2° does not apply to construction, demolition or roadbuilding works.

 

§ 2.

If dry or windy weather is forecast, the piles shall be additionally sprinkled with water or foam.

 

Sprinkling may be replaced by spraying with a binding agent if the effectiveness of the agent is guaranteed. Notches and damage to the binding agent in the storage pile shall be inspected and repaired. Spraying shall be repeated if deemed necessary from the point of view of preventing the diffusion of dust.

 

§ 3.

If the measures stated in paragraphs 1 and 2 are not taken, the storage pile shall be covered with fine-mesh nets or tarpaulins or the pile shall be transferred to an enclosed storage facility, as stipulated in Article 4.4.7.2.2, paragraph 2.


Article 4.4.7.2.6.

§ 1.

The diffusion of dust during transport, loading and unloading of dust-producing substances shall be avoided as much as possible by:

adequately moistening wettable substances in dust category SC2;

providing operators with procedures for the use of the transport and transshipment equipment that at least contains the relevant elements stated in Appendix 4.4.7.2.

 

Appendix 4.4.7.2. may be supplemented or amended by the minister.

 

§ 2.

The diffusion of dust during transport, loading and unloading of dust-producing substances using claw buckets shall be avoided as much as possible by:

using a claw bucket whereby the blades fit together well;

using a claw bucket that is half-closed or closed at the top for substances in dust categories SC1 and SC2, if the substance being handled allows this.

 

 

§ 3.

The diffusion of dust during transport, loading and unloading of dust-producing substances using conveyor belts shall be avoided as much as possible by:

shielding open conveyor belts outside against wind using longitudinal screens, transverse screens or shelters if dust emissions remain visible after the code of good practice stated in Appendix 4.4.7.2 has been applied; 

switching to a closed conveyor system if dust emissions remain visible after taking the measures stated in point 1°.

 

A fixed conveyor belt for the transport of substances in dust category SC1 that is commissioned after 31 December 2013 shall be enclosed or covered. This does not apply to those parts of the conveyor belt that are loaded by a hopper or another transshipment system.

 

§ 4.

The diffusion of dust at transfer points of continuous transport systems shall be avoided as much as possible by:

moistening or spraying the transfer points where substances in dust category SC2 are transferred if the products were not sufficiently moistened beforehand;

2° 

if the measures stated in point 1° cannot be applied or if dust is still visibly being diffused even after these measures have been taken, providing the transfer points where substances in dust category SC2 are transferred with wind reduction screens if this is technically possible;

equipping the transfer points of fixed transport systems for substances in dust category SC1 with a housing or dust extractor if this is technically possible. This also applies to dust categories SC2 and SC3 if dust emissions remain visible after the measures stated in points 1° and 2° have been taken;

equipping the unloading points of mobile conveyor belts for substances in dust category SC1 with a shield that connects as tightly as possible to the loading point of the next transport system or a dust extractor. This also applies to dust categories SC2 and SC3 if dust emissions remain visible after the measures stated in points 1° and 2° have been taken.

 

 

§ 5.

The diffusion of dust during loading and unloading of dust-producing substances using hoppers shall be avoided as much as possible by:

fitting the hopper for substances in dust category SC1 with effective baffles or grilles. This also applies to substances in dust category SC2 that are not adequately moistened;

equipping fixed hoppers for substances in dust category SC1 with a dust extractor system, unless this is impossible due to location-specific conditions. This measure does not need to be taken if the operator can show that the hopper is used to load and unload substances in dust category SC1 for no more than 10% of the time it is in use.

 

 

§ 6.

The diffusion of dust during loading and unloading of dust-producing substances using chutes, filling tubes, filler pipes and conveyor belts shall be avoided as much as possible by:

equipping the loading and unloading installation, if technically and operationally possible, with brake plates or modifying its end to limit the diffusion of dust;

equipping new loading and unloading installations, if operationally possible, with brake plates or modifying the end of the installation to limit the diffusion of dust;

 

 

§ 7.

The diffusion of dust during loading and unloading of trucks and railway wagons with dust-producing substances shall be avoided as much as possible by:

for trucks that leave the site, covering a flatbed trailer filled with substances in dust category SC1 with a tarpaulin. This also applies to substances in dust category SC2 if the moisture content of these substances is not sufficient to prevent the diffusion of dust;

equipping the drop holes into which dust-producing substances are tipped with baffle plates.

 

If the loading of the loading body or the transport that leaves the site is carried out by third parties, the staff of these third parties shall be provided with instructions in accordance with point 1°.


Article 4.4.7.2.7.

The diffusion of dust by traffic on and around the industrial site shall be avoided as much as possible by:

regularly cleaning the roads on the site;

limiting vehicle speeds on the site;

sprinkling the roads on the site if there is a chance of dust being diffused;

regularly cleaning the areas where storage and transshipment take place;

taking measures to prevent the diffusion of dust on the public roads as much as possible.

 


Article 4.4.7.2.8. During the period in which transshipment activities take place, the operator shall supervise the storage and transshipment activities to quickly identify dust emissions and establish their cause, so that suitable measures can be taken.

Article 4.4.7.2.9.

From 1 July 2015, the operator must satisfy the obligations stated in Article 4.4.7.2.2 to Article 4.4.7.2.8., inclusive.

 

By way of derogation from paragraph 1, from 1 January 2014, the operator must satisfy the obligations stated in Article 4.4.7.2.2 to Article 4.4.7.2.8, inclusive, for procedures and operations that do not lead to necessary modifications to the infrastructure.

 


Article 4.4.7.2.10. Translation not available