Chapter 4.2.
CONTROL OF SURFACE WATER POLLUTION


Section 4.2.1.
Scope and general provisions


Article 4.2.1.1.

The provisions of the present Chapter are applicable to the discharging of:

-

industrial waste water and cooling water as referred to in Sections [...] 3.4. and 3.5.,

-

waste water originating from waste water treatment installations as referred to in Section 3.6.,

-

domestic waste water as referred to in Section 3.2.

Included in part 6:

-

the conditions for discharging domestic waste water originating from residential areas, including from any corresponding waste water treatment installation;

-

the conditions for discharging domestic waste water, other than that originating from residential areas, in which the flow rate does not exceed 600 m/annum, including from any corresponding waste water treatment installation.


Article 4.2.1.2. Translation not available

Article 4.2.1.3. Translation not available

Subtitle:.
The discharging of industrial waste water and cooling water


Section 4.2.2.
The discharging of industrial waste water not containing hazardous substances


Article 4.2.2.1. Translation not available

Subsection 4.2.2.1.
The discharging of industrial waste water not containing hazardous substances into ordinary surface waters [...]

Article 4.2.2.1.1.

The general conditions for discharges into ordinary surface waters and/or for discharges of industrial waste water containing no hazardous substances in the outlying area to be individually optimised are as follows:

1

if the industrial waste water to be discharged contains such a quantity of pathogenic germs that the receiving water might become dangerously polluted as a result of the discharge, the waste water must first be disinfected;

2

the pH value of the discharged industrial waste water may not be over 9 or below 6.5; if the discharged industrial waste water originates from the use of ordinary surface water and/or groundwater and if the natural pH value of this surface water and/or groundwater is over 9 or below 6.5, one may use this natural pH value for determining the limit values for the pH of the discharge;

3

the biochemical oxygen demand in five days at 20C in the industrial waste water discharged may not exceed 25 mg oxygen demand per litre;

4

the temperature of the industrial waste water discharged may not exceed 30C; if it is explicitly stated in the licence and with an outside temperature of 25C or more, or if the cooling water is taken in at a temperature of 20C or more, the waste water discharged may have a temperature of up to 35C insofar as this does not cause the temperature of the receiving surface water to exceed the value indicated in the environmental quality standards;

5

in the industrial waste water discharged, the following concentrations may not be exceeded:

a)

0.5 millilitres per litre for settlable solids (during stationary sedimentation for two hours);

b)

60 milligrams per litre for suspended solids;

c)

5 milligrams per litre for perchloroethylene-extractable apolar substances;

d)

3 milligrams per litre for the sum of anionic, non-ionic and cationic surface-active agents;

6

if the industrial waste water discharged originates from the use of ordinary surface water and/or groundwater, the values set down in sub 3 and sub 5 of the present Article may be increased by the concentration value in the water taken in;

7

a representative sample of the industrial waste water discharged must not contain oils, fats or other floating substances in such quantities that the presence of a floating film can be established unequivocally; when in doubt, the presence of the film can be established by pouring the sample into a separating funnel to examine whether the two phases can be separated.


Subsection 4.2.2.2.
Discharge of industrial waste water containing no hazardous substances into the public sewage system of a municipality for which a zoning plan has not yet been finalised.

Article 4.2.2.2.1. [...]

Article 4.2.2.2.2. [...]

Subsection 4.2.2.3.
The discharging of industrial waste water not containing hazardous substances into the public sewage systems

Article 4.2.2.3.1.

In a municipality for which the municipal zoning plan has been finalised, the discharge of industrial waste water containing no hazardous substances in the central area, the collectively optimised outlying area and/or the outlying area to be collectively optimised must satisfy the following general conditions:

1

the pH value of the industrial waste water discharged must be between 6 and 9.5;

2

the temperature of the industrial waste water discharged may not exceed 45C;

3

the dimensions of the suspended solids present in the industrial waste water discharged may not exceed 1 cm. These substances do not hinder the proper operation of the pumping and treatment stations by their structure;

4

the industrial waste water discharged does not contain any dissolved, flammable or explosive gases, or products that could cause such gases to be released. The industrial waste water discharged does not cause any dissemination of effluvia that harm the environment;

5

the following concentrations may not be exceeded in the discharged industrial waste water:

a)

1 g/l suspended solids;

b)

0.5 g/l substances extractable in petroleum ether.

6

unless explicitly provided for in the licence, the industrial waste water discharged may not contain substances that:

a)

constitute a hazard for the maintenance personnel of the sewer system and water treatment installation;

b)

may damage or block the pipes;

c)

constitute an impediment to the proper working of the pumping and water treatment units;

d)

may cause serious pollution of the receiving surface water or may seriously pollute the receiving surface water in which the water from the public sewer is discharged;

7

assessment of the discharge of industrial waste water at a sewage treatment installation is governed by the criteria stated in Articles 2 and 3 of the Order of the Government of Flanders of 21 February 2014 establishing the rules for the discharge of industrial waste water at a public sewage treatment installation.


Article 4.2.2.3.2. In a municipality for which the municipal zoning plan has been finalised, the discharge of industrial waste water containing no hazardous substances in the outlying area to be individually optimised must satisfy the conditions of Article 4.2.2.1.1.

Article 4.2.2.3.3. In the case of existing licensed or reported discharges, those conditions of the present subsection which differ in a stricter sense from the situation as it was before the municipal zoning plan was finalised are to come into force on the first day of the 29th month after finalisation of the municipal zoning plan.

Section 4.2.3.
The discharging of industrial waste water containing one or more hazardous substances.


Article 4.2.3.1. Translation not available

Section 4.2.4.
Discharging of cooling water


Article 4.2.4.1. Translation not available

Subtitle:.
Measurements and monitoring upon discharge of industrial waste water, cooling water and water treatment installation influent/effluent


Section 4.2.5.
Measurements and monitoring


Subsection 4.2.5.1.
Monitoring installation and sampling equipment

Article 4.2.5.1.1. Translation not available

Article 4.2.5.1.2. Translation not available

Subsection 4.2.5.2.
Self-monitoring programme for the discharging of industrial waste water not containing hazardous substances

Article 4.2.5.2.1. Translation not available

Subsection 4.2.5.3.
Self-monitoring programme for the discharging of industrial waste water containing one or more hazardous substances

Article 4.2.5.3.1. Translation not available

Subsection 4.2.5.4.
Monitoring programme for the discharging from waste water treatment installations where urban waste water is treated

Article 4.2.5.4.1. Translation not available

Article 4.2.5.4.2.

1.

The measurements and analyses referred to in Article 4.2.5.4.1. must be performed and assessed in accordance with the programme and criteria described in Appendix 4.2.5.4.

2.

The operator must record the results of the measurements carried out in a measurement dossier that must always be kept available for inspection by the supervisory bodies.


Section 4.2.6.
Assessment of monitoring measuring results by the supervisory body


Article 4.2.6.1.

1.

When taking samples of the discharged waste water (industrial waste water and cooling water), in connection with the technical inspection of the discharge of waste water stated in Articles 37 to 56, inclusive, of the Order of the Government of Flanders of 12 December 2008 implementing Title XVI of the Decree of 5 April 1995 concerning the general stipulations related to environmental policy, either at least one scoop sample is taken, or a flow-proportional 24-hour mixed sample, or simultaneously both at least one scoop sample and a flow-proportional 24-hour mixed sample.

2.

Should the analysis of a scoop sample show that the value measured for a parameter, with allowances made for accuracy and precision, exceeds twice the emission limit value for that parameter, the limit value is assumed to have been exceeded. As regards the parameters flow rate, acidity and temperature, and as regards the substances in Appendix 2C, however, the limit value is also assumed to have been exceeded if the measured value is higher, with allowances made for the measurement uncertainty requirements for these parameters in Appendix 4.2.5.2, than the emission limit value for that parameter. If no emission limit value is available, the test must be performed against the classification criterion for hazardous substances in accordance with Appendix 2.3.1.

3.

Should the analysis of a scoop sample show that the measured value for a parameter other than flow rate, acidity and temperature and the substances in Appendix 2C is less than or equal to twice the emission limit value for that parameter, but is higher, with allowances made for the measurement uncertainty requirements for that parameter given in Appendix 4.2.5.2, than the emission limit value or classification criterion for that parameter (or, failing this, the reporting limit that applies to that parameter), an evaluation of the value measured for that parameter should be made in a second sample. This second sample will be either the 24-hour flow rate-proportional mixed sample taken at the same time as the first sample or, if only one sample was taken, a new sample taken within a reasonable period of time. Should the measured value in this second sample also be higher, with allowances made for the measurement uncertainty requirements for that parameter given in Appendix 4.2.5.2, than the emission limit value for that parameter, the limit value is assumed to have been exceeded.

4.

Should the analysis of a flow rate-proportional 24-hour mixed sample show that the measured value for a parameter is higher, with allowances made for the measurement uncertainty requirements for that parameter given in Appendix 4.2.5.2, than the emission limit value or classification criterion for that parameter (or, failing this, the reporting limit that applies to that parameter), the limit value is assumed to have been exceeded.

5.

When evaluating limit values for discharge loads, the concentration measured in the 24-hour flow rate-proportional mixed sample is multiplied by the total flow rate discharged over this 24-hour period, with allowances made for the measurement uncertainty requirements for that parameter given in Appendix 4.2.5.2. Should it transpire that this discharged load is higher than the limit value for the discharge load, the emission value is assumed to have been exceeded.

6.

When evaluating parameter proportions, the concentrations in the 24-hour flow rate-proportional mixed sample are used. If the value thus obtained differs by more than 50% from the limit value, the limit value is assumed to have been exceeded


Subtitle:.
The discharging of domestic waste water


Section 4.2.7.
Discharge of domestic waste water in a municipality for which the municipal zoning plan has not yet been finalised


Subsection 4.2.7.1.
The discharging of domestic waste water in ordinary surface waters or in artificial drainage systems

Article 4.2.7.1.1. [...]

Article 4.2.7.1.2. [...]

Subsection 4.2.7.2.
Discharging domestic waste water in public sewage systems

Article 4.2.7.2.1. [...]

Subsection 4.2.7.3.
Working and maintenance of individual pre-treatment installations, such as septic tanks

Article 4.2.7.3.1. [...]

Section 4.2.8.
Discharge of domestic waste water in a municipality for which the municipal zoning plan has been finalised


Subsection 4.2.8.1.
Discharge of domestic waste water in the outlying area to be individually or collectively optimised


Article 4.2.8.1.1. Translation not available

Article 4.2.8.1.2. Whenever the public road does not have a public sewage system, and, moreover, it does not appear possible to discharge waste water into a neighbouring watercourse in accordance with the laws and regulations, it is permissible to discharge domestic waste water into a man-made drainage channel pursuant to Article 4.2.1.3, under the same conditions as those in Article 4.2.8.1.1.

Subsection 4.2.8.2.
Discharge of domestic waste water in the central area or the collectively optimised outlying area


Article 4.2.8.2.1.

1.

In a municipality for which the municipal zoning plan has been finalised, the discharge of domestic waste water inthe central area or the collectively optimised outlying area is permissible under the following general conditions:

1

the discharged waste water may not contain textile fibres, or plastic packaging materials, or solid domestic waste materials of an organic or inorganic nature.

2

the discharged water may not contain:

a)

mineral oils, inflammable substances or volatile solvents;

b)

other substances extractable with petroleum ether, with a value in excess of 0.5 g/l;

c)

other substances likely to make the sewer water toxic or dangerous.

2.

In the central area or the collectively optimised outlying area, it is preferable for domestic waste water to be discharged directly into the public sewage system. Wherever dictated by the drainage situation or the nature of the treatment technology, the local authority can impose the requirement that waste water be passed through an individual pre-treatment installation before discharge into the public sewage system.

3.

[...]

4.

[...]


Article 4.2.8.2.2.

In the case of discharge of domestic waste water from a temporary sanitary installation erected in the open air at a publicly accessible establishment, the express written permission of the operator of the sewage treatment plant must be obtained.

Additional conditions may be imposed in the record of the notice depending on the optimal functioning of the downstream sewage system, including overflows, and the sewage treatment plant.


Subsection 4.2.8.3.
Operation and maintenance of individual pre-treatment installations


Article 4.2.8.3.1.

The working and the maintenance of individual pre-treatment installations must comply with the following general provisions:

1

it is forbidden to discharge septic material into the public sewage system or into waste water catchments.

2

septic material must be transported to a public water treatment installation.

The public water treatment installation can reject (part of) the delivered load, which must be taken to a licensed processor.


Subsection 4.2.8.4.
Transitional regulations


Article 4.2.8.4.1. [...]