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Date: 20.03.78
EC DESIG.: 78/319
COUNCIL DIRECTIVE ON TOXIC AND DANGEROUS WASTE

Amendment/assimilation directives:

Parties

European Communities.

Immediate subject matter

Polluter: Systems/facilities/companies producing/possessing and/or disposing of toxic waste
Protection of/acceptor:
Human health and environment
Protected area:
EIA relevance:
The occurrence of toxic and hazardous substances is to be restricted; the utilisation and conversion of such waste as well as other methods of reusing said waste are to be promoted.

Notes

Toxic waste refers to waste containing substances given in the list below.

Reference

Data source analysed: EC environment legislation (UREG, 1988)

Further information

List of toxic and hazardous substances or materials

1. Arsenic; arsenic compounds

2. Mercury; mercury compounds

3. Cadmium; cadmium compounds

4. Thallium; thallium compounds

5. Beryllium; beryllium compounds

6. Chromium-(VI)-compounds

7. Lead; lead compounds

8. Antimony; antimony compounds

9. Phenol; phenol compounds

10. Organic and inorganic cyanides

11. Isocyanates

12. Organic halogen compounds with the exception of inert polymeric materials and other substances which are covered by this list or by other Directives concerning the disposal of toxic or hazardous waste.

13. Chlorinated solvents

14. Organic solvents

15. Biocides and phyto-pharmaceutical substances

16. Tar-containing materials from refining processes and tar residues from distillation

17. Pharmaceutical compounds

18. Peroxides, chlorates, perchlorates and azides

19. Ether

20. Non-recognizable and/or new chemical laboratory materials with unknown effects on the environment

21. Asbestos (dust and fibres)

22. Selenium; selenium compounds

23. Tellurium; tellurium compounds

24. Polycyclic aromatic compounds (carcinogenic)

25. Metallic carbon compounds

26. Soluble copper compounds

27. Acidic and/or alkaline substances used for the surface treatment of metals

 

Date: 26.06.78
EC DESIG.: 78/631
COUNCIL DIRECTIVE ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES RELATING TO THE CLASSIFICATION, PACKAGING AND LABELLING OF DANGEROUS PREPARATIONS (PESTICIDES)

Amendment/assimilation directives:

81/187 dated 26.03.81

Parties

European Communities.

Immediate subject matter

Polluter:
Protection of/acceptor:
Protected area:
EIA relevance:
The Directive regulates the classification of some 130 hazardous formulations (pesticides) according to hazard potential (highly poisonous, poisonous, health hazard).

Notes

No measured values (standards) are quoted.

Reference

Data source analysed: EC environment legislation (UREG, 1988)

Further information

 

Date: 18.07.78
EC Desig.: 78/659
COUNCIL DIRECTIVE ON THE QUALITY OF FRESH WATERS NEEDING PROTECTION OR IMPROVEMENT IN ORDER TO SUPPORT FISH LIFE

Amendment/assimilation directives:

Parties

European Communities.

Immediate subject matter

Polluter:
Protection of/acceptor:
Fish, freshwater
Protected area:
Directive calls for establishment of corresponding bodies of water
EIA relevance: The aim of the Directive is to ensure compliance with quality requirements for freshwater to preserve fish life. Parameters for determining water quality.

Notes

Guide values and imperative values with notes on analysis/monitoring are listed for a total of 14 parameters (temperature, dissolved oxygen, pH value, suspension concentration and other chemical concentrations). A distinction is made between salmonoid and cyprinid waters.

Reference

Data source analysed: EC environment legislation (UREG, 1988)

Further information

LIST OF PARAMETERS

Parameters Salmonoid waters Cyprinid waters Method of analysis/ monitoring Frequency of sampling and measurement Remarks
G I F I
1. Temperature (°C) 1. The temperature measured beneath a waste-heat introduction point (namely on the border of the mixing zone) must not exceed the values for non-impaired temperature by more than
1.5°C 3°C

Under certain conditions, the Member States may decide upon geographically restricted exceptional provisions insofar as the responsible authority can prove that this will not result in any detriment to the balanced development of fish stocks.
2. Moreover, the waste heat must not cause the temperature in the zone below the introduction point (on the border of the mixing zone) to exceed the following values:

21.5 (0) 28 (0)
10 (0) 10 (0)

The temperature limit value of 10°C only applies to the spawning season of those species which require cold water for their propagation and only to water suitable for such species.
The temperature limit values may be subject to temporal overshoot in 2% of cases.

Temperature measurement Once a week, both above and below the waste-heat introduction point Excessively sudden increases in temperature are to be avoided
2. Dissolved oxygen mg/l O2 50% >= 9
100% >= 7
50% >= 9
If the oxygen content
drops below 6 mg/l, the Member States apply Article 7 Paragraph 3. The respon-sible author-ities must prove that the balanced development of fish stocks is not impaired as a result.
50% >= 8
100% >= 5
50% >= 7
If the oxygen content drops below 4 mg/l, the Member States apply Article 7 Paragraph 3. The respon-sible author-ities must prove that the balanced development of fish stocks is not impaired as a result.
Winkler method
or specific electrodes (electrochemical method)
At least one sample per month which is representative of low oxygen content on the day of sampling.
If, however, there is a suspicion of more pronounced daily changes, at least two samples per day.
 
3. pH   6-9 (0)   6-9 (0) Electrometry:
Calibration by way of two buffer solutions with known pH value in vicinity of and preferably on either side of the pH value to be measured
Once a month  
4. Suspensions (mg/l) 25 (0)   25 (0)   Filtration via filter membrane 0.45*m or centrifuging (min. time
5 minutes, average acceleration 2800-3200g). Drying at 105°C and weighing.
  The stated values are average concentrations and do not apply to suspensions with harmful chemical properties. Particularly high concentrations are to be expected in the event of high tide.
5. BSB5
(mg/l O2)
< 3   < 6   O2 determination by way of Winkler method before and after five days incubation in total darkness at 20°C* 1°C (nitrification should not be prevented)    
6. Total phosphorus (mg/l P)         Molecular absorption spectrophotometry   Use could be made of following equation in the case of lakes with an average depth of between 18 and 300 metres:
L = Impact, expressed as mg P per m2 of lake surface per annum
Z = Mean depth of lake in metres
Tw= Theoretical water exchange time of lake in years
In other cases limit values of 0.2 mg/l for salmonoid waters and 0.4 mg/l for cyprinoid waters (expressed as PO4) can be viewed as guide value for reduc-tion of eutrophication.
7. Nitrites
(mg/l NO2)
< 0.01   < 0.03   Molecular absorption spectrophotometry    
8. Compounds containing phenol (mg/l C6H5OH)   (2)   (2) Check on taste   Taste is only checked if the presence of compounds containing phenol is suspected
9. Oil hydrocarbons   (3)   (3) Visual inspection
Check on taste
Once a month A visual inspection is made at regular, monthly intervals; a check is only made on taste if the presence of hydrocarbons is suspected
10. Non-ionized ammonia (mg/l NH3) < 0.005 < 0.025 < 0.005 < 0.025 Molecular absorption spectrophotometry using indophenol blue or Nessler method in conjunction with determination of pH value and temperature Once a month Slight increases in the course of the day can be accepted with non-ionized ammonia
The total ammonia concentration must not exceed the following values to reduce the danger of toxicity due to non-ionized ammonia, oxygen consumption due to nitrification and eutrophication:
11. Total ammonia
(mg/l NH4)
< 0.04 < 1(4) < 0.2 < 1(4)      
12. Total residual chlorine
(mg/l HOCl)
  < 0.005   < 0.005 DPD method (diethyl-p-phenylenediamine) Once a month The I-values correspond to pH = 6. Higher overall chlorine concentrations can be accepted given higher pH values.
13. Total zinc
(mg/l Zn)
  < 0.3   < 0.1 Atom absorption spectrometry Once a month The I-values correspond to a water hardness of 100 mg/l CaCO3. Refer to corresponding limit values in appendix II for degrees of hardness between 10 and 500 mg/l
14. Dissolved copper (mg/l Cu) < 0.04   < 0.04   Atom absorption spectrometry   The G-values correspond to a water hardness of 100 mg/l CaCo3. Refer to corresponding limit values in appendix II for degrees of hardness between 10 and 300 mg/l.

(1) The artificial changes in the pH value with respect to the non-impaired values must not be more than *0.5 pH units in the range between 6.0 and 9.0 so that these changes do not increase the harmfulness of other substances in the water.

(2) The compounds containing phenol must not be present in such concentrations that they impair the flavour of the fish.

(3) The oil hydrocarbons must not be present in the water in such quantities that they:

- form a visible film on the surface of the water or form a layer on the bed of watercourses and lakes;
- harm the fish.

(4) The Member States may stipulate values in excess of 1 mg/l in the case of special geographical or climatic conditions particularly in the event of low water temperatures and reduced nitrification or if the responsible authorities can prove that there will be no detrimental consequences for the balanced development of the fish stocks.

General note:

It should be noted that when establishing the parameter values, it was assumed that the parameters considered in this annex/other parameters not considered are favourable. This means above all that the concentrations for other harmful substances are very weak.

If two or more harmful substances occur simultaneously in the form of a mixture, joint effects (additive, synergetic or antagonistic) may become significant.

Abbreviations:

G = Guide value
I = Imperative value
(0) = Deviations possible as per Article 11.

 

Date: 23.11.78
EC DESIG.: 78/1015
COUNCIL DIRECTIVE ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES ON THE PERMISSIBLE SOUND LEVEL AND EXHAUST SYSTEM OF MOTORCYCLES

Amendment/assimilation directives:

Parties

European Communities.

Immediate subject matter

Polluter: Motorcycles
Protection of/acceptor:
Noise, humans
Protected area:
EIA relevance:
Depending on capacity, the noise level of motorcycles must not exceed certain limit values (see below).

Notes

Measurement method and conditions are explained in the Directive.

Reference

Data source analysed: EC environment legislation (UREG, 1988)

Further information

As a function of capacity, the noise level of motorcycles must not exceed the following limit values given the conditions listed in the Annex to the Directive:

Capacity cc

Limit value for noise level
dB(A)

<80

78

125

80

350

83

500

85

>500

86

The measurement specification stipulates for example:
Maximum noise level (sound pressure level)

- in passing, measured at a distance of 7.5 m from reference line in centre of vehicle and at a level of approx. 1.2 m above ground level.

- as stationary noise, at a distance of roughly 0.5 m from end of exhaust pipe.

The Annex to the Directive contains further specifications.

 

Date: 19.12.78
EC DESIG.: 79/113
COUNCIL DIRECTIVE ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES RELATING TO THE DETERMINATION OF THE NOISE EMISSION OF CONSTRUCTION PLANT AND EQUIPMENT

Amendment/assimilation directives:

81/1051 dated 30.12.81

Parties

European Communities.

Immediate subject matter

Polluter: Construction machinery and equipment
Protection of/acceptor:
Noise, humans
Protected area:
EIA relevance:
The Directive regulates the determination of the noise emission level of construction machinery and equipment with methods, measurement conditions and other technical specifications being given in the Annex to the Directive.

Notes

Compare Directives 84/532/EEC to 84/537/EEC.

Reference

Data source analysed: EC environment legislation (UREG, 1988)

Further information

 

Date: 21.12.78
EC DESIG.: 79/117
COUNCIL DIRECTIVE PROHIBITING THE PLACING ON THE MARKET AND USE OF PLANT PROTECTION PRODUCTS CONTAINING CERTAIN ACTIVE SUBSTANCES

Amendment/assimilation directives:

Parties

European Communities.

Immediate subject matter

Polluter: Pesticides
Protection of/acceptor:
Humans, animals and environment
Protected area:
EIA relevance:
Pesticides containing one or more of the active substances listed below may neither be marketed nor used. Exceptional provisions are permitted.

Notes

The Directive does not apply to pesticides intended for export to non-EC countries.

Reference

Data source analysed: EC environment legislation (UREG, 1988)

Further information

Active substances or groups of active substances:

A. Mercury compounds

1. Mercurous oxide
2. Mercurous chloride (Calomel)
3. Other inorganic mercury compounds
4. Alkyl mercury compounds
5. Alkoxyalkyl and aryl mercury compounds

B. Durable chlorine compounds

1. Aldrin
2. Chlordane
3. Dieldrin
4. DDT
5. Endrin
6. HCH with less than 99.0% gamma isomer content
7. Heptachlor
8. Hexachlorobenzene

 

Date: 02.04.79
EC DESIG.: 79/409
COUNCIL DIRECTIVE ON THE CONSERVATION OF WILD BIRDS

Amendment/assimilation directives:

Parties

European Communities.

Immediate subject matter

Polluter:
Protection of/acceptor:
Birds
Protected area:
Territories of member states
EIA relevance: The Directive is concerned with the preservation of all wild birds indigenous to Europe.

Notes

Special protection measures are to apply to the 24 listed species with regard to their habitat in order to ensure their survival. There is also a list of 72 types of bird for which hunting is permitted.

Further restrictions are country-specific.

The measures include the provision and marking out of suitable protected areas. The Directive does not apply to Greenland.

Reference

Data source analysed: EC environment legislation (UREG, 1988)

Further information

 

Date: 09.10.79
EC DESIG.: 79/869
COUNCIL DIRECTIVE CONCERNING THE METHODS OF MEASUREMENT AND FREQUENCIES OF SAMPLING AND ANALYSIS OF SURFACE WATER INTENDED FOR THE ABSTRACTION OF DRINKING WATER IN THE MEMBER STATES

Amendment/assimilation directives:

Parties

European Communities.

Immediate subject matter

Polluter:
Protection of/acceptor:
Surface water, drinking water
Protected area:
EIA relevance:
The Directive is concerned with reference measurement methods for determining the total of 46 parameter values contained in Directive 75/440/EEC.

Notes

The Directive 75/440/EEC regulates the quality requirements to be imposed on surface water used to obtain drinking water in line with 46 parameters.

Reference

Data source analysed: EC environment legislation (UREG, 1988)

FURTHER INFORMATION

APPENDIX I

REFERENCE MEASUREMENT METHODS FOR DETERMINING PARAMETER VALUES I AND/OR G AS PER DIRECTIVE 75/440/EEC

(A) (B)   (C) (D) (E) (F) (G)
  Parameter   Detection limit Accuracy
+ -
Correctness
+ -
Reference measurement method Recommended vessel material
1 pH value pH unit - 0.1 0.2 - Electrometry
Measurement is taken on site during sampling without specimen pretreatment
 
2 Discoloration (following single-medium filtering) mg Pt/l 5 19% 20% - Filtration through glass fibre membrane
Photometric method in line with calibration values of platinum-cobalt scale
 
3 Total suspensions mg/l - 5% 10% - Membrane filtration (0,45*m),
drying at 105°C and weighing

- Centrifuging (at least 5 min., mean acceleration 2800 - 3200 g), drying at 105°C and weighing

 
4 Temperature °C - 0.5 1 - Temperature measurement
Measurement on site during sampling without specimen pretreatment
 
5 Conductivity at 20°C *S/cm - 5% 10% - Electrometry  
6 Odour Dilution factor at 25°C - - - - Establishment by way of dilution series Glass
7 Nitrates mg/l NO3 2 10% 20% - Molecular absorption spectrophotometry  
8 Fluorides mg/l F 0.05 10% 20% - Molecular absorption spectrophotometry, if necessary following distillation

- Ion-sensitive electrodes

 
9 Total extractable organic chlorine mg/l Cl          
10 Iron (dissolved) mg/l Fe 0.02 10% 20% - Atom absorption spectrometry after membrane filtration (0.45*m)
Molecular absorption spectrophotometry after membrane filtration (0.45*m)
 
11 Manganese mg/l Mn 0.01 (2) 10% 20% - Atom absorption spectrometry  
- Atom absorption spectrometry
0.02 (3) 10% 20% - Molecular absorption spectrophotometry
12 Copper (10) mg/l Cu 0.005 10% 20% - Atom absorption spectrometry  
- Polarography
0.02 (4) 10% 20% - Atom absorption spectrometry
- Molecular absorption spectrophotometry
- Polarography
13 Zinc (10) mg/l Zn 0.01 (2) 10% 20% - Atom absorption spectrometry  
0.02 10% 20% - Atom absorption spectrometry
- Molecular absorption spectrophotometry
14 Boron (10) mg/l B 0.1 10% 20% - Molecular absorption spectrophotometry

- Atom absorption spectrometry

Material which does not contain considerable quantities of boron
15 Beryllium mg/l Be          
16 Cobalt mg/l Co          
17 Nickel mg/l Ni          
18 Vanadium mg/l V          
19 Arsenic (10) mg/l As 0.002 (2) 20% 20% - Atom absorption spectrometry  
- Atom absorption spectrometry
0.01 (5)     - Molecular absorption spectrophotometry
20 Cadmium (10) mg/l Cd 0.0002 30% 30% - Atom absorption spectrometry  
0.001 (5)     - Polarography
21 Total chromium (10) mg/l Cr 0.01 20% 30% - Atom absorption spectrometry
- Molecular absorption spectrophotometry
 
22 Lead (10) mg/l Pb 0.01 20% 30% - Atom absorption spectrometry

- Polarography

 
23 Selenium (10) mg/l Se 0.005     - Atom absorption spectrometry  
24 Mercury (10) mg/l Hg 0.0001
0.0001 (5)
30% 30% - Atom absorption spectrometry
(cold vapour method)
 
25 Barium (10) mg/l Ba 0.02 15% 30% - Atom absorption spectrometry  
26 Cyanides mg/l CN 0.01 20% 30% - Molecular absorption spectrophotometry  
27 Sulphates mg/l SO4 10 10% 10% - Gravimetry

- Complexometry with ethylenediamine-tetraacetic acid

- Molecular absorption spectrophotometry

 
28 Chlorides mg/l Cl 10 10% 10% - Titrimetry (Mohr's method)

- Molecular absorption spectrophotometry

 
29 Surface-active substances (methylene blue active) mg/l
(lauryl sulphate)
0.05 20%   - Molecular absorption spectrophotometry  
30 Phosphates mg/l P2O5 0.02 10% 20% - Molecular absorption spectrophotometry  
31 Phenols
(phenol count)
mg/l C6H5OH 0.0005 0.0005 0.0005 - Molecular absorption spectrophotometry
4-aminoantipyrine method
Glass
0.001 (6) 30% 50% - p-nitroaniline method
32 Dissolved or emulsified hydrocarbons mg/l 0.01 20% 30% - Infrared spectrometry following extraction with hydrogen tetrachloride Glass
0.04 (3)     - Gravimetry following extraction with petroleum ether
33 Polycyclic aromatic hydrocarbons (10) mg/l 0.00004 50% 50% - Measurement of fluorescent intensity in UV light following thin-layer chromatography

- Reference measurement vis-à-vis mixture of 6 standard substances with same concentration (8)

Glass or aluminium
34 Total pesticides (parathion, hexa-chlorocyclohexane, dieldrin) (10) mg/l 0.0001 50% 50% - Gas or liquid chromatography following extraction with suitable solvent and purification. Identification of mixture constituents, quantitative analysis (9) Glass
35 Chemical oxygen demand (COD) mg/l O2 15 20% 20% - Potassium chromate method  
36 Oxygen saturation index % 5 10% 10% - Winkler method

- Electrochemical method

Glass
37 Biochemical oxygen demand at 20°C without nitrification (BOD5) mg/l O2 2 1.5 2 - Determination of dissolved O2 before and after five days incubation at 20 ± 1°C in darkness. Addition of nitrification inhibitor  
38 Kjeldahl nitrogen (except NO2 and NO4 nitrogen) mg/l N 0.5 0.5 0.5 - Mineralization and distillation in line with Kjeldahl method, ammonia determination by molecular absorption spectrophotometry or titrimetry.  
39 Ammonia mg/l NH4 0.01 (2)
0.1 (3)
0.03 (2)
10% (3)
0.03 (2)
20% (3)
- Molecular absorption spectrophotometry  
40 Chloroform extractable substances mg/l (11) - - - Extraction at pH 7 with purified chloroform, vacuum evaporation at ambient temperature, weighing of residue Glass
41 Total organic carbon mg/l C          
42 Organic carbon following flocculation and membrane filtration (5*m) mg/l C          
43 Total coliforms /100 ml 5 (2)
500 (7)
    - Cultivation at 37°C on specific solid nutrient medium suitable for this purpose (lactose tergitol agar, endo-agar, 0.4% teepol agar) with (2) or without (7) filtration and counting of colonies. The specimens must be diluted or where necessary concentrated to such an extent that they contain 10-100 colonies. Identification if necessary by gas formation.

- Dilution method with fermentation in liquid substrates in at least three preparations with three dilutions. Where positive, transfer to analytical medium. Counting out of most probable number.
Incubation temperature 37 ± 1°C.

Sterilized glass
44 Faecal coliforms /100 ml 2 (2)
200 (7)
    - Cultivation at 44°C on specific solid nutrient medium suitable for this purpose (lactose tergitol agar, endo-agar, 0.4% teepol agar) with (2) or without (7) filtration and counting of colonies. The specimens must be diluted or where necessary concentrated to such an extent that they contain 10-100 colonies. Identification if necessary by gas formation.

- Dilution method with fermentation in liquid substrates in at least three preparations with three dilutions. Where positive, transfer to analytical medium. Counting out of most probable number.
Incubation temperature 44 ± 0.5°C.

Sterilized glass
45 Faecal streptococci /100 ml 2 (2)
200 (7)
    - Cultivation at 37°C on specific solid nutrient medium suitable for this purpose (e.g. sodium azide) with (2) or without (7) filtration and counting of colonies. The test specimens must be diluted or where appropriate concentrated to such an extent that they contain 10-100 colonies.

- Dilution method in sodium azide broth in at least three preparations with three dilutions, counting of most probable number.

Sterilized glass
46 Salmonellae(12) 1/5000ml
1/1000ml
      - Concentration by way of filtration (membranes or suitable filters); inoculation on pre-enriched nutrient medium. Enrichment, transfer to isolation agar-agar, identification. Sterilized glass

(1) The surface water samples taken at the drawing point are analysed and measured after passing through mesh filter to remove floating residues such as wood or plastic.

(2) For water of category A1 value G

(3) For water of categories A2 and A3

(4) For water of category A3

(5) For water of categories A1, A2, A3 value I

(6) For water of categories A2 value I and A3

(7) For water of categories A2 and A3 value G

(8) Mixture of six standard substances of the same concentration: fluoranthene; 3,4-benzofluoranthene; 11,12-benzofluoranthene; 3,4-benzoperylene; 1,2,3-cd/-indenopyrene

(9) Mixture of three substances with same concentration: parathion, hexachlorocyclohexane, dieldrin

(10) If the suspension content of the test specimens is such that special specimen pretreatment is required, the measurement accuracy values in E may for once be exceeded and then represent a target value. These specimens must be treated such that as many of the substances to be measured as possible are analysed.

(11) As this method is not standard practice in all Member States, there is no guarantee that the detectability value required for checking the values established in the Directive 75/440/EEC can be attained.

(12) Not detectable in 5000 ml (A1, G) and not detectable in 1000 ml (A2, G).

APPENDIX II

Annual minimum frequency of sampling and analysis with reference to the individual parameters as per Directive 75/440/EEC

 

A1(*)

A2(*)

A3(*)

Population

I(**)

II(**)

III(**)

I(**)

II(**)

III(**)

I(**)

II(**)

III(**)

<= 10000

(***)

(***)

(***)

(***)

(***)

(***)

2

1

(***)(1)

> 10000 - <= 30000

1

1

(***)

2

1

(***)

3

1

1

> 30000 - <= 100000

2

1

(***)

4

2

1

6

2

1

> 100000

3

2

(***)

8

4

1

12

4

1

(*) Quality of surface water, appendix II to Directive 75/440/EEC
(**) Classification of parameters according to frequency
(***) Frequency to be established by responsible national authorities

(1) As such surface water is intended to be used to obtain drinking water, the Member States are recommended to take at least an annual sample of water in this category (A3, III, *10000)

GROUPS

I Parameters

II Parameters II Parameters

1

pH value 10 Iron (dissolved)  8 Fluorides

2

Discoloration 11 Manganese 14 Boron

3

Total suspensions 12 Copper 19 Arsenic

4

Temperature 13 Zinc 20 Cadmium

5

Conductivity 27 Sulphates 21 Total chromium

6

Odour 29 Surface-active substances 22 Lead

7

Nitrates 31 Phenols 23 Selenium

28

Chlorides 38 Kjeldahl nitrogen 24 Mercury

30

Phosphates 43 Total coliforms 25 Barium

35

Chemical oxygen demand 44 Faecal coliforms 26 Cyanides

36

Oxygen saturation index     32 Dissolved or emulsified hydrocarbons

37

Biochemical oxygen demand     34 Total pesticides

39

Ammonia     40 Chloroform-extractable substances
        45 Faecal streptococci
        46 Salmonellae

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