laboratory testing results of drinking waters, waters and...

Laboratory Testing Results of Drinking Waters, Waters and Sediment Collected from an Informal Pond, as well as Wastewater Collected in the Vicinity of Datang Hexigten Coal-to-Gas Project

Testing Results of Water Samples from an Informal Pond

On August 2nd 2014, Greenpeace East Asia (hereafter ‘Greenpeace’) collected two water

samples using scientific methods from an informal pond near the west boundary of the

Datang Hexigten Coal-to Gas Project plant. One sample was taken far from the discharge

pipe (CN14015) and the other one near the discharge pipe (CN14016). The samples were

delivered to Greenpeace Research Laboratories based at the University of Exeter

(hereafter ‘Greenpeace Research Laboratories’) for testing. The samples were analyzed

qualitatively for volatile (VOCs) and semi-volatile organic compounds (SVOCs), and

quantitatively for a range of common metals.

On August 30th 2014, Greenpeace once again collected a single water sample (Wastewater

1) near the discharge pipe from the informal pond using scientific methods. The sample

was delivered to an accredited independent third-party testing facility in China (hereafter

‘third-party testing facility’) for quantitative analysis for a range of organic compounds and

metals.

Some of the compounds were present below the limit of detection for the analytical method

employed, and in these cases the results are presented in tables as ‘<xx’, where xx is the

method detection limit for the individual compound.

Table 1 Concentrations of Metals and Metalloids (µg/l) in Filtered and Whole water

Samples from the Informal Pond, as determined by Greenpeace Research Laboratories

Filtered sample (dissolved metals)

Waters samples from the informal pond

Whole sample (total metals)

Water samples from the informal pond

CN14015 CN14016 CN14015 CN14016

Antimony <100 <100 Antimony <100 <100

Arsenic <10 <10 Arsenic <10 <10

Cadmium <5 <5 Cadmium <5 <5

Chromium <10 <10 Chromium <10 <10

Cobalt <20 <20 Cobalt <20 <20

Copper <10 <10 Copper <10 <10

Iron 1230 1200 Iron 2210 2740

Lead <40 <40 Lead <40 <40

Manganese 122 137 Manganese 142 162

Mercury <5 <5 Mercury <5 <5

Molybdenum <30 <30 Molybdenum <30 <30

Nickel <20 <20 Nickel <20 <20

Selenium <10 <10 Selenium <10 <10

Vanadium <20 <20 Vanadium <20 <20

Zinc <5 <5 Zinc 453 597

Table 2 Qualitative testing results of organic compounds (VOCs and SVOCs) identified in

the informal pond water sample CN14015, as determined by Greenpeace Research

Laboratories

Sample code No. of chemicals identified

Compounds identified to be better than 90%

Note

CN14015

VOCs (11)

Carbon disulphide Dimethyl sulphide Benzene Chlorobenzene 1,4-dichlorobenzene Ethylbenzene Dichloromethane Isopropylbenzene Toluene m-Xylene and/or p-Xylene o-Xylene

Trace levels only

SVOCs (15)

Phenyl isocyanate methylphenol dimethylphenol (2 isomers) ethylphenol ethylmethylphenol (2 isomers) 4-(1,4-dimethylethyl)phenol Phthalic acid Diethylphthalate methylnaphthalene 9H-Fluorene Phenanthrene Pyrene

Phenol derivatives PAHs

Table 3 Qualitative testing results of organic compounds (VOCs and SVOCs) identified in

the informal pond water sample CN14016, as determined by Greenpeace Research

Laboratories

Sample code

No. of chemicals identified

Compounds identified to be better than 90% Note

CN14016

VOCs (15)

Benzene Dimethyl sulphide Dimethyl trisulphide Chlorobenzene 1,4-dichlorobenzene Ethylbenzene Isopropylbenzene Carbon disulphide Dichloromethane Styrene Toluene m-Xylene and/or p-Xylene o-Xylene

Trace levels only

SVOCs (44)

Dimethyl trisulphide phenylethanone methylphenol (2 isomers) ethylphenol dimethylphenol (4 isomers) ethylmethylphenol (2 isomers) Dibutylphenol Phthalic acid Benzylmethyl disulphide Dimethylphthalate Dibenzofuran Phenyl isocyanate Diethylphthalate 9H-Fluorene 9H-Fluorene-9-ol Phenanthrene Fluoranthene 1-methylnaphthalene 2-methylnaphthalene trimethylnaphthalene

Phenol derivatives

PAHs & derivatives

Table 4 Quantitative testing results of water sample (Wastewater 1) from the informal

pond, as determined by the Chinese third-party testing facility

Test Subject Test result Test subject Test result

Volatile Phenols (mg/l) 0.0153 Zinc (mg/l) 2 0.04(8)

Fluorides (mg/l)5 3.82 Lead (mg/l) 2 <0.2

Sulfides (mg/l) 5 0.010 CODCr (mg/l) 2,5 58.6

Cyanides (mg/l) 2 <0.004 Naphthalene (ng/l) 4 <25

Petroleum Oils (mg/l) 2 0.43 Acenaphthylene (ng/l) 4 <1.0

Benzene (µg/l) 4 0.13 Acenaphthlene (ng/l) 4 36.5

Toluene (µg/l) 4 0.35 Fluorene (ng/l) 4 303

Ethylbenzene (µg/l) 4 0.14 Phenanthrene (ng/l) 4 453

m- /p-Xylene (µg/l) 4 0.30 Anthracene (ng/l) 4 <1.0

o-Xylene (µg/l) 4 0.12 Fluoranthene (ng/l) 4 78.4

Phenol (mg/l) 2 0.00050 Pyrene (ng/l) 4 66.6

Mercury (µg/l) 2,5 2.4 Benzo[a]anthracene (ng/l) 4 6.7

Chromium (µg/l) 2,7 0.65 Chrysene (ng/l) 4 8.3

Arsenic (µg/l) 2 <5.0 Benzo[b]fluoranthene (ng/l) 4 53.5

Cadmium (mg/l) 2 <0.04 Benzo[k]fluoranthene (μg/L) (ng/l) 4

<0.5

Nickel (mg/l) 2 <0.15 Benzo[a]pyrene (ng/l) 4 41.5

Copper (mg/l) 2,9 <0.01 Indeno[1,2,3-c,d]pyrene (ng/l)

4 2.4

Iron (mg/l) 2 0.1(8) Dibenzo[a,h]anthracene (ng/l)

4 0.8

Manganese (mg/l)2 <0.04 Benzo[g,h,i]perylene (ng/l) 4 2.0

Testing results of sediment samples from the informal pond

On August 2nd 2014, Greenpeace collected a single sediment sample far from the

discharge pipe (CN140017) from the same informal pond, using scientific method. The

sample was delivered to Greenpeace Research Laboratories for testing. The sample was

analyzed qualitatively for SVOCs, and quantitatively for a range of common metals.

On August 30th 2014, Greenpeace once again collected another single sediment sample far

from the discharge pipe (Sediment 1) from the informal pond using scientific methods.

The sample was delivered to the third-party testing facility for quantitative analysis for a

range of organic compounds and metals.

Table 5 Qualitative testing results of semi-volatile organic compounds (SVOCs) identified

in sediment sample CN14017, as determined by Greenpeace Research Laboratories

Sample code


Compounds identified to be better than 90% Note

CN14017

SVOCs (33)

Pentadecane Docosane Dibenzofuran Benzo[b]naphtha(2,3-d)furan 1-methyl-7-(1-methylethyl)phenol Triphenylene 9H-Fluorene 1-methyl-9H-Fluorene Phenathrene Fluoranthene Pyrene Benzo[a]pyrene Naphthalene 1-methylpaphthalene 2-methylnaphthalene Dimethylnaphthalene Phenylnaphthalene

PAHs & derivatives

Table 6 Concentrations of metals

and metalloids (mg/kg) in

sediment sample CN14017 from

the informal pond, as

determined by Greenpeace

Research Laboratories

Solid sample (total metals, mg/kg)

CN14017

Antimony <10

Arsenic <1

Cadmium <1

Chromium 4

Cobalt <2

Copper 3

Lead <0.5

Manganese 27

Mercury <0.5

Molybdenum <4

Nickel 2

Selenium <40

Vanadium 4

Zinc 142

Table 7 Testing results of sediment sample (Sediment 1) from

the informal pond, as determined by the Chinese third-party

testing facility

Test subject Test result

Volatile Phenols (mg/kg, dry weight)1,5 0.30

Phenol (mg/kg, dry weight) 2,5 0.123

Fluorides(mg/kg, dry weight) 1,5 278

Petroleum Oil (mg/kg, dry weight)1,2,5 54.7

Mercury (mg/kg, dry weight) 2,5 0.017

Arsenic (mg/kg, dry weight) 10 1.15

Copper (mg/kg, dry weight) 2 <1.9

Zinc (mg/kg, dry weight) 2 116

Cadmium (mg/kg, dry weight)4 <0.1

Chromium(mg/kg, dry weight) 2 3.9

Manganese (mg/kg, dry weight) 2,5 62.4

Nickel (mg/kg, dry weight) 2 2.5

Cobalt (mg/kg, dry weight) 2 <0.4

Vanadium (mg/kg, dry weight) 2 5.5

Lead (mg/kg, dry weight) 2 8.4

Naphthalene (µg/kg, dry weight) 3,5 65.7

Acenaphthylene (µg/kg, dry weight) 3,5 18.3

Acenaphthlene (µg/kg, dry weight) 3,5 26.2

Fluorene (µg/kg, dry weight) 3,5 220

Phenanthrene (µg/kg, dry weight) 3,5 753

Anthracene (µg/kg, dry weight) 3,5 310

Fluoranthene (µg/kg, dry weight) 3,5 664

Pyrene (µg/kg, dry weight) 3,5 618

Benzo[a]anthracene (µg/kg, dry weight)

3,5 380

Chrysene (µg/kg, dry weight) 3,5 292

Benzo[b]fluoranthene (µg/kg, dry weight) 3,5

434

Benzo[k]fluoranthene (µg/kg, dry weight)

3,5 70.2

Benzo[a]pyrene (µg/kg, dry weight) 3,5 217

Indeno[1,2,3-c,d]pyrene (µg/kg, dry weight) 3,5,6

84.8

Dibenzo[a,h]anthracene (µg/kg, dry weight) 3,5

28.6

Benzo[g,h,i]perylene (µg/kg, dry weight)

3,5 84.2

Testing Results of Wastewater Samples from the Formal Evaporation Pond

On August 30th 2014, Greenpeace collected two parallel wastewater samples using

scientific methods from the formal evaporation pond, which is located to the southeast of

the Datang Hexigten Coal-to-Gas Project plant. One sample (CN14018) was delivered to

Greenpeace Research Laboratories and the other one (Wastewater 2) to the third-party

testing facility.

Table 8 Concentrations of metals and metalloids (µg/l) in filtered and whole wastewater

samples (CN14018) from the formal evaporation pond, as determined by Greenpeace

Research Laboratories


Wastewater from the evaporation pond

Whole sample (total metals)

Wastewater from the evaporation pond

CN14018 CN14018

Antimony <100 Antimony <100

Arsenic 48 Arsenic 53

Cadmium <5 Cadmium <5

Chromium <10 Chromium <10

Cobalt <20 Cobalt <20

Copper <10 Copper <10

Iron 301 Iron 1370

Lead <40 Lead <40

Manganese 28 Manganese 103

Mercury <5 Mercury <5

Molybdenum <30 Molybdenum <30

Nickel <20 Nickel <20

Selenium 11 Selenium 16

Vanadium <20 Vanadium <20

Zinc 33 Zinc 177

Table 9 Volatile organic compounds (VOCs) identified in the wastewater sample

CN140018 from the formal evaporation pond, as determined by Greenpeace Research

Laboratories


VOCs (154)

Compounds identified to better than 90%

Phenol & derivatives Other compounds

Phenol

Methylphenol

Ethylphenol

Azido‐phenol

Dimethylphenol (3 isomers)

(E)‐3‐Phenyl‐2‐butenal

1‐(2‐Ethylphenyl)ethan‐1‐one

1‐Methyl‐2,3‐dihydroindene

2‐Cyclopenten‐1‐one, dimethyl‐

Methylbutane

Propanone

Benzaldehyde

Benzenemethanol

Toluene

Decane

Dodecane

Tetramethylhexadecane

Diisopropyl ether

Isopropyl(6‐phenylhex‐5‐ynyl)amine

N‐Benzyl‐3‐pyrroline‐N‐oxide

N‐Benzyl‐N‐(phenylethyl)amine

1,3,5‐Trimethyl‐1H‐Pyrazole

Dimethylthiophene

trans‐3‐Methoxy‐5‐(4‐methoxyphenyl)‐1,2,4‐ trioxolane

Tetrahydro‐2‐methyl‐2‐furancarboxaldehyde

5‐Phenyl‐2‐tetrahydrofurylmethyl 2'‐pyridyl sulfide

Benzene derivatives

Tetramethylbenzene

Difluorobenzene

Dimethylbenzene

1‐Methyl‐2‐(1‐propynyl)benzene

Propenylbenzene

4‐Ethenyl‐1,2‐dimethylbenzene

Pyridines derivatives

Methylpyridine

Dimethylpyridine

Trimethylpyridine

2‐Pyridinecarboxylic acid

Naphthalene & derivatives

Naphthalene

1‐Methylnaphthalene

2‐Methylnaphthalene

Table 10 Semi-volatile organic compounds (SVOCs ) identified in the wastewater sample

CN140018 from the formal evaporation pond, as determined by Greenpeace Research

Laboratories

No. of chemicals identified SVOCs (209)

Compounds identified to better than 90%

Phenol & derivatives PAHs & derivatives

Phenol

Methylphenol (2 isomers)

Dimethylphenol (3 isomers)

Trimethylphenol (2 isomers)

Ethylphenol

Diethylphenol (2 isomers)

Ethylmethylphenol (3 isomers)

Propylphenol

Methoxyphenol

Methylpropylphenol

9H‐Fluorene

Hydroxymethylnaphthalene

9H‐Fluorenol (2 isomers)

Other compounds

Methyl‐4‐indanol

Ethylanisole

1,1'‐Biphenylol (2 isomers)

Ethynylbiphenyl

2‐Cyclohexene‐1‐carbonitrile

2,3‐Dihydro‐2‐methylbenzo[b]thiophene

3,4,5,6,7,8‐Hexahydro‐(2H)‐naphthalenone

Allyl toluenesulfonate

10‐Azatricyclo[4.3.1.0(1,6)]deca‐2,4‐diene

Hydroxyphthalide

2,3‐Dihydro‐1H‐inden‐5‐ol

(4‐Fluorophenyl)butynone

Benzo[d]isothiazole

(E)‐2‐(2H(1)‐4‐Methoxyphenylethene

Methoxyphenylacetone

1‐Methylene‐1H‐indene

Dimethyl‐3‐phenylaziridine

Pyridines derivatives

Phenylpyridine

9H‐Indeno[2,1‐b]pyridine

3,5‐Diacetyl‐1H‐pyrazole

5‐(Phenylmethyl)‐2‐pyridinamine

Quinoline derivatives

Isoquinoline

Methylisoquinoline

Methylquinoline

7,8‐Dihydro‐6‐methyl‐6H‐pyrrolo[2,3‐g]quinoline

Table 11 Testing results of wastewater samples from the formal evaporation pond, as

determined by the Chinese third-party testing facility

Test subject Test Result Test Subject Test Result

Volatile Phenols (mg/L)

31.1 Zinc (mg/L) 2 0.21

Fluorides (mg/L) 5 0.88 Lead (mg/L) 2 <0.2

Sulfides (mg/L) 5 0.022 CODCr (mg/L) 2,5 2460

Cyanides (mg/L) 2 <0.004 Naphthalene (μg/L) 4 <25

Petroleum Oil (mg/L) 2 1.15 Acenaphthylene (μg/L) 4 0.44

Benzene (μg/L) 4 7.57 Acenaphthlene (μg/L) 4 3.67

Toluene (μg/L) 4 16.1 Fluorene (μg/L) 4 26.3

Ethylbenzene (μg/L) 4 8.79 Phenanthrene (μg/L) 4 56.6

m- /p-Xylene (μg/L) 4 29.7 Anthracene (μg/L) 4 20.6

o-Xylene (μg/L) 4 12.4 Fluoranthene (μg/L) 4 25.0

Phenol (mg/L) 2 58.6 Pyrene (μg/L) 4 20.7

Mercury (μg/L) 2,5 2.8 Benzo[a]anthracene (μg/L) 4 10.4

Chromium (μg/L) 2,7 3.56 Chrysene (μg/L) 4 7.35

Arsenic (μg/L) 2 <5.0 Benzo[b]fluoranthene (μg/L) 4 9.15

Cadmium (mg/L) 2 <0.04 Benzo[k]fluoranthene (μg/L) 4 1.39

Nickel (mg/L) 2 <0.15 Benzo[a]pyrene (μg/L) 4 5.47

Copper (mg/L) 2,9 <0.01 Indeno[1,2,3-c,d]pyrene (μg/L) 4 3.87

Iron (mg/L) 2 1.1 Dibenzo[a,h]anthracene (μg/L) 4 0.86

Manganese (mg/L) 2 <0.04 Benzo[g,h,i]perylene (μg/L) 4 2.58

Testing results of drinking water samples from private wells located in the vicinity of Datang Hexigten Coal-to-Gas Project

On August 2nd 2014, Greenpeace used scientific methods and collected 14 drinking water samples from private wells located in the vicinity of

the Datang Hexigten Coal-to Gas Project plant. The samples (CN14001-14) were delivered to Greenpeace Research Laboratories for testing.

On August 30th 2014, Greenpeace used scientific methods and collected 11 drinking water samples (Well 1-11) from the same sampled

private wells1 , which were delivered to the third-party testing facility for quantitative analysis.

Table 12 Testing results of drinking water samples, as determined by the Chinese third-party independent testing facility

Test subject Test result

Well 1 Well 2 Well 3 Well 4 Well 5 Well 6 Well 7 Well 8 Well 9 Well 10 Well 11

Volatile Phenols (mg/L)

0.0003(8) 0.0008 0.0008 0.0005 0.0019 0.0008 0.0017 0.0006 0.0008 0.0007 0.0012

Fluorides (mg/L) 5 0.05(8) <0.05 0.05(8) 0.05(8) <0.05 <0.05 <0.05 0.05(8) 0.05(8) 0.13 0.05(8)

Sulfides (mg/L) 5 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002

Cyanides (mg/L)2 <0.004 <0.004 <0.004 <0.004 <0.004 <0.004 <0.004 <0.004 <0.004 <0.004 <0.004

Petroleum Oil (mg/L) 2

0.39 0.30 0.44 0.28 0.24 0.24 0.24 0.31 0.35 0.31 0.29

Benzene (µg/L) 4 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08

Toluene (µg/L) 4 0.25 0.23 0.22 0.20 0.21 0.20 0.20 0.19 0.19 0.18 0.18

Ethylbenzene (µg/L) 4

<0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10

m- /p-Xylene (µg/L) 4

<0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10

o-Xylene (µg/L) 4 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10

Phenol (µg/L)2 0.071 0.055 0.033 0.103 0.007 0.028 0.025 0.049 0.014 0.017 0.013

1 On August 30

th 2014, there was no one at home in three out of the 14 households where Greenpeace planned to sample private well water Greenpeace sampled on August 2

nd, making it

impossible to collect samples at those locations.

Table 13 Concentrations of metals and metalloids (µg/l) in filtered drinking water samples, as determined by Greenpeace Research

Laboratories


Concentrations (µg/l)

CN 14001

CN 14002

CN 14003

CN 14004

CN 14005

CN 14006

CN 14007

CN 14008

CN 14009

CN 14010

CN 14011

CN 14012

CN 14013

CN 14014

Antimony <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100

Arsenic <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10

Cadmium <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5

Chromium <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10

Cobalt <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20

Copper <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10

Iron 170 <20 164 <20 <20 <20 22 <20 27 <20 <20 <20 30 131

Lead <40 <40 <40 <40 <40 <40 <40 <40 <40 <40 <40 <40 <40 <40

Manganese 414 553 186 265 612 257 227 298 172 146 <5 22 235 367

Mercury <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5

Molybdenum <30 <30 <30 <30 <30 <30 <30 <30 <30 <30 <30 <30 <30 <30

Nickel <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20

Selenium <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10

Vanadium <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20

Zinc <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5

Table 14 Concentrations of metals and metalloids (µg/l) in whole drinking water samples, as determined by Greenpeace Research

Laboratories

Whole samples (total metals)

Concentrations (µg/l)

CN 14001

CN 14002

CN 14003

CN 14004

CN 14005

CN 14006

CN 14007

CN 14008

CN 14009

CN 14010

CN 14011

CN 14012

CN 14013

CN 14014

Antimony <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100

Arsenic <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10

Cadmium <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5

Chromium <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10

Cobalt <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20

Copper <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10

Iron 1470 2580 1560 3490 1900 240 657 628 1240 700 603 276 6265 3630

Lead <40 <40 <40 <40 <40 <40 <40 <40 <40 <40 <40 <40 <40 <40

Manganese 425 562 181 265 616 263 241 329 193 158 13 41 267 411

Mercury <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5

Molybdenum <30 <30 <30 <30 <30 <30 <30 <30 <30 <30 <30 <30 <30 <30

Nickel <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20

Selenium <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10

Vanadium <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20

Zinc <5 <5 31 7 8 <5 9 <5 <5 <5 <5 <5 <5 <5

15

Table 15 Organic compounds (VOCs and SVOCs) identified in drinking water samples

CN14001-14, as determined by Greenpeace Research Laboratories

Sample code No. of chemicals identified

Compounds identified to be better than 90%

Note

CN14001 4 Dichloromethane Diethylphthalate

Trace levels only

CN14002 4 Carbon disulfide Tetrachloroethene Dichloromethane

Trace levels only

CN14003 2 Dichloromethane Trace levels only

CN14004 0 n/a

CN14005 1 Carbon disulphide Trace levels only

CN14006 3 Dichloromethane Diethylphthalate

Trace levels only

CN14007 0 n/a

CN14008 0 n/a

CN14009 2 Phthalic acid Diethylphthalate

Trace levels only


Trace levels of phthalic acid, more prominent peak of diethylphthalate


Trace levels only

CN14012 3 n/a


Trace levels only

CN14014 3 Dichloromethane Trace levels only

Note:

1. The certified reference material (CRM) used by the accredited third-party testing

facility was in liquid matrix.

2. For these substances, quality control carried out by the accredited third-party testing

facility consisted of checking against certified reference material (CRM) or laboratory

prepared matrix spike.


facility consisted of comparison of sample duplicates for reproducibility. CRM and/or

laboratory-prepared matrix spike samples were not analyzed in these cases.

16


facility consisted of comparison against sample blanks. CRM and/or laboratory-prepared

matrix spike samples were not analyzed in these cases.

5. Data for blanks were not reported by the accredited third-party testing facility.

6. The relative percent difference (RPD) between the replicates was over 30% in this

case.

7. Although the method detection limit was 0.5 µg/L, blanks were reported by the

accredited third-party testing facility for this substance only as ‘<150 µg/L’, as this

value is equivalent to 10% of the corresponding limit (1.5 mg/L) set out in Integrated

Wastewater Discharge Standard (GB 8978-1996).

8. The sample concentration reported by the accredited third-party testing facility is

the same as the corresponding detection limit.

9. Although the method detection limit was 0.01 mg/L, blanks were reported by the

accredited third-party testing facility for this substance only as ‘<0.05 mg/L’, as this

value is equivalent to 10% of the corresponding limit (0.5 mg/L) set out in Integrated

Wastewater Discharge Standard (GB 8978-1996).

10. No QC data was provided by the accredited third-party testing facility for this

substance.

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