coal concepts proficiency testing general analysis …

of 22

`

COAL CONCEPTS PROFICIENCY TESTING

GENERAL ANALYSIS SAMPLE

REPORT EIGHTY-SEVEN

Revision 00

Final report

DATE ISSUED: 31 JANUARY 2019

PARTICIPANT

SCHEME COORDINATOR: K MUNSAMY

SIGNATURE: _____________________

CHECKED BY: R BABOOLAL (SCHEME MANAGER)

Disclaimer: Opinions and interpretations expressed herein are outside the scope of SANAS accreditation *Moisture in the analysis sample is not included in the SANAS schedule of accreditation as robust statistics cannot be applied.

Chlorine, Fluorine, Quick ash, ASTM ash and ASTM Volatiles is not included in the scope of accreditation.

THINKING QUALITY, QUALITY THINKING

REGISTRATION NUMBER: 2006/149731/23 (RMB INDUSTRIAL STATIONERS cc t/a)

81 CERAMIC CURVE, ALTON, RICHARDS BAY 3900 l TEL: +27(0)35 751 2446 l CEL: +27(0)83 6500151 l FAX: 0862605793

E-MAIL: [email protected]

LABORATORY CODE:

mailto:[email protected]

of 22

EXECUTIVE SUMMARY

1. One hundred and thirteen samples were sent to participants with 109 timeous result submissions

2. The total number of outliers found were as follows (dry base):

ISO Volatile Matter x 6

Quick Ash x 1

Calorific Value x 2

Sulphur x 2

Carbon x 1

Nitrogen x 1

ASTM Volatile Matter x 1

3. Nitrogen, Chlorine, Fluorine, ASTM Ash & ASTM Volatile Matter participants were insufficient to warrant robust statistical calculations. The average result was used as the assigned value.

4. Trending for your laboratory is as follows:

of 22

TABLE OF CONTENTS

ITEM

PAGE NUMBER

Letter to participant

4

List of participants

5

Type of sample used

6

Preparation of sample

6

Homogeneity check

6

Stability check

7

ISO Ash data

8

ISO Ash z-score trend

9

Quick Ash data & trend 10

ISO Volatile matter data

11

ISO Volatile matter z-score trend

12

Calorific value data

13

Calorific value z-score trend

14

Total sulphur data

15

Total sulphur z-score trend

16

Phosphorous data and Z-Score trend

17

Carbon data / Hydrogen data / Nitrogen data

18

AFT data and z-scores

19

ASTM Ash and ASTM Volatile matter, Chlorine & Fluorine 20

Conclusion

21

Terms & Conditions 22

of 22

Dear Participant

RE: PROFICIENCY TESTING RESULTS FOR THE MONTH OF JANUARY 2019

Thank you for your participation in the Coal Concepts proficiency testing scheme.

Your laboratory code is

All results are totally confidential. Any results in Bold, Italics and Underlined are outliers. Where applicable, the most

extreme outliers have been eliminated from calculations using the Grubbs estimate for outliers. Robust statistics has been

applied where possible. Analysis results have been reported on air dry and dry base. The dry base results have been used

to calculate the z-scores.

Please take note of the following:

1. Z-scores between -1 and +1 is deemed acceptable

2. Z-scores between -2 and -3 should serve as a warning that the analysis result could get worse

3. Z-scores between +2 and +3 should also serve as a warning that analysis results could get worse.

4. Z- scores lower than -3 and exceeding +3 should warrant an investigation

5. Compare your result to the robust average which will be the assigned value. The measurement of uncertainty (UoM) of

the results is also stated.

6. All calculations can be made available upon request

The Coal Concepts scheme adheres to the requirements of ISO/IEC 17043:2010 – Conformity assessment – General

requirements for proficiency testing.

Statistical analysis has been carried out using ISO/IEC 13528:2015-Statistical methods for use in proficiency testing by

interlaboratory comparisons

Please find results attached together with Z-score trends.

Best Regards

R Baboolal

of 22

LIST OF PARTICIPANTS IN ALPHABETICAL ORDER

Arcelor Mittal - Vanderbijl Park Arcelor Mittal - Newcastle

Anglo SOC - Goedehoop Colliery South Plant Anglo SOC - Goedehoop Colliery North Plant

Anglo SOC - Kleinkopje Colliery Anglo SOC - Greenside Colliery

Anglo SOC - Landau Colliery Alfred H Knight -Richards Bay Laboratory

Afrisam - Dudfield AquaSpecto

Afrisam - Ulco Bureau Veritas Inspectorate Laboratories - Middelburg

Bureau Veritas – Moatize, Vale Bureau Veritas - Nacala

Bureau Veritas Inspectorate Laboratories - Tendele Bureau Veritas Inspectorate Laboratories - Beira

Bureau Veritas Inspectorate Laboratories - Alton Bureau Veritas Testing & Inspection SA - Pretoria

Cotecna Turkey – Istanbul Laboratory Castle Peak Power Station – Hong Kong

Cotecna South Africa - AMR Cotecna South Africa - Nasonti

Cotecna South Africa - Lurco Cotecna South Africa - Phola

Cotecna South Africa – Tselentis Cotecna South Africa - Kangala

Cotecna South Africa - Middelburg Cotecna South Africa - Umlabu

Cotecna South Africa - Mimosa Cotecna South Africa - VDD

Delmas Coal Exxaro Resources - Grootegeluk Mine

Eyethu Coal Wilge Eyethu Coal Mooifontein

Eskom Holdings SOC Ltd – Kendal Power station Eskom Holdings SOC Ltd - Duvha Power Station

Eskom Holdings SOC Ltd – Lethabo Power Station Eskom Holdings SOC Ltd - Komati Power Station

Eskom Holdings SOC Ltd - Tutuka Power Station Eskom Holdings SOC Ltd - Grootvlei Power Station

Eskom Holdings SOC Ltd - ERID Eskom Holdings SOC Ltd - Kriel Power Station

Eskom Holdings SOC Ltd - Hendrina Power Station Eskom Holdings SOC Ltd - Matimba Power Station

Eskom Holdings SOC Ltd - Arnot Power Station Exxaro Resources - Matla Mine

Eskom Holdings SOC Ltd - Matla Power Station Eskom Holdings SOC Ltd – Medupi Power Station

Eskom Holdings SOC Ltd – Majuba Power Station G&W Base & Industrial Minerals

Glencore Wonderkop Glencore -Rustenburg Smelter

Glencore Boshoek Smelter Glencore -Lydenburg Smelter

Glencore Lion Smelter GLI Laboratuvar Sube Mudurlugu Komur Deney Laboratuvari - Turkey

HighVeld Laboratories Idwala Lime

Intertek Mozambique Kangra Coal (Pty) Ltd

Lafarge Industries SA (Pty) Ltd - Lichtenburg Mpumamanzi

Morupule Coal Mine - Botswana Mafube Colliery Mine pty (ltd)

Martech Marine surveyors - India Makomo Resources

Msobo Coal Pty Ltd Mitra SK South Africa (Pty) Ltd

M L Coal Noko Analytical Services CC - Welgemeend

Noko Analytical Services CC - Hakahno Noko Analytical Services CC - Twistdraai

Noko Analytical Services CC - Witbank Ronewa Lab

Richards Bay Minerals

Seriti - Kriel Colliery Seriti - New Vaal Colliery

Siza Coal Services - Dundee Siza Coal Services - Vlakfontein

Siza Coal Services - Botswana Siza Coal Services - Kinross

Siza Coal Services - Middelburg Siza Coal Services - NCC

Siza Coal Services - Carolina Siza Coal Services - Mooiplaats

Siza Coal Services - Wildfontein Siza Coal Services - Sasolburg

South 32 – Khutala Colliery

Sibonisiwe Coal Laboratory Services CC – Rirhandzu Lab Sibonisiwe Coal Laboratory Services CC - West Coal Processing

Sibonisiwe Coal Laboratory Services CC Sibonisiwe Coal Laboratory Services CC – Mzimkhulu

Sibonisiwe Coal Laboratory Services CC – Elandsfontein Sibonisiwe Coal Laboratory Services CC - Vaalbult

SGS South Africa (Pty) Ltd – Richards Bay Coal Terminal Laboratory SGS South Africa (Pty) Ltd - Leeuwpan Laboratory

SGS South Africa (Pty) Ltd - Trichardt Laboratory SGS South Africa (Pty) Ltd – Richards Bay Port Laboratory

SGS South Africa (Pty) Ltd – GGV Laboratory SGS South Africa (Pty) Ltd - Middelburg Laboratory

SGS South Africa (Pty) Ltd - Impunzi Laboratory SGS South Africa (Pty) Ltd - Wondefontein Laboratory

SABS Commercial SOC Ltd Sudor SGS Tweefontein

SABS Commercial SOC Ltd CSIR SGS South Africa (Pty) Ltd - Chilwavuhusiku Laboratory

SABS Commercial SOC Ltd Uitkomst SABS Commercial SOC Ltd Secunda

SPTE Lab - Middelburg SABS Commercial SOC Ltd Richards bay

Tata Steel – Wales Lab, Europe SABS Commercial SOC Ltd Springlake

UIS Analytical Services Umzamo Analytical Services - Londani

Umzamo Analytical Services - Overlooked Colliery Umzamo Analytical Services - Witbank

Umzamo Analytical Services - Doornrug

Vitrovian Analytical Services Koornfontein Vitrovian Analytical Services DELMAS

Zululand Anthracite Colliery Vinca Institute for Nuclear Sciences - Serbia

of 22

1. TYPE OF SAMPLE USED

The coal used in this proficiency testing round was bituminous coal from Mpumalanga.

2. PREPARATION OF SAMPLE

Approximately 800kg’s of sample with an approximate topsize of 50mm was sourced. This was crushed to -4mm

using a jaw crusher. The -4mm material was reduced to -212um using a cross beat pulveriser. The 212 material

was sieved using a 212um screen. Any +212um material was pulverised and sieved until all material passed

through the 212 um sieve.

All the -212um material was then mixed in a mixing drum for 4 hours.

3. HOMOGENEITY CHECK

There were 113 participants in this round, 10 portions of sample were randomly extracted from the 800kg

sample. These were packaged in their final form i.e. in 200ml sample bottles. The bottles were labelled 1 to 10.

The results were as follows:

SAMPLE NO.

TEST PORTION 1

TEST PORTION 2

sample av (Xt) range (Wt) range sqd

1 29,7 29,72 29,71 0,02 0,0004

2 29,69 29,81 29,75 0,12 0,0144

3 29,82 29,66 29,74 0,16 0,0256

4 29,72 29,69 29,71 0,03 0,0009

5 29,73 29,76 29,75 0,03 0,0009

6 29,82 29,71 29,77 0,11 0,0121

7 29,72 29,67 29,70 0,05 0,0025

8 29,81 29,69 29,75 0,12 0,0144

9 29,68 29,62 29,65 0,06 0,0036

10 29,75 29,63 29,69 0,12 0,0144

GENERAL AVERAGE 29,72 STANDARD DEVIATION 0,036 WITHIN SAMPLE STANDARD DEVIATION 0,067

BETWEEN SAMPLE STANDARD DEVIATION 0,031

The between sample standard deviation must be ≤ 0.3 x ơ

(ơ = std deviation for the proficiency assessment)

Ơ = 2% of the mean was used, which is the repeatability for ISO ash (Ash % > 10%)

Hence 0.3 x 0.594 = 0.178

Since 0.031 < 0.178 the samples are homogenous

of 22

4. STABILITY CHECK Samples were retained for sales as reference material. ten of them were randomly chosen for stability testing.

In order for the proficiency testing samples to be declared stable the general average from the homogeneity

check and that of the stability check the difference in the general average should not differ by more than 0.3 X

precision

This test has been carried out about a month after the samples were received by the participating laboratories

SAMPLE NO.

TEST PORTION 1

TEST PORTION 2

sample av (Xt) range (Wt) range sqd

1 29,82 29,98 29,90 0,16 0,0256

2 29,96 29,83 29,90 0,13 0,0169

3 29,87 29,88 29,88 0,01 0,0001

4 29,89 29,93 29,91 0,04 0,0016

5 29,94 29,87 29,91 0,07 0,0049

6 29,83 29,86 29,85 0,03 0,0009

7 29,95 29,78 29,87 0,17 0,0289

8 29,85 29,98 29,92 0,13 0,0169

9 29,84 29,87 29,86 0,03 0,0009

10 29,93 29,81 29,87 0,12 0,0144

GENERAL AVERAGE 29,88 STANDARD DEVIATION 0,025 WITHIN SAMPLE STANDARD DEVIATION 0,075 BETWEEN SAMPLE STANDARD DEVIATION 0,047

(Ơ = 0.538 was used)

For this report 0.3 x 0.598 = 0.179

Absolute value of (29.72 – 29.88) = 0.16

Since 0.16< 0.179 the proficiency testing samples were stable

of 22

COAL CONCEPTS - PROFICIENCY TESTING -JANUARY 2019

ANALYTICAL PARAMETER : ISO ASH (%)

LAB ID MOISTURE IN ANALYSIS SAMPLE (%) AIR DRY (%) DRY BASE (%) Z-SCORE (DRY BASE)

1a 3,46 29,87 30,94 -0,12

6a 3,00 29,69 30,61 -1,11

7a 3,33 30,73 31,79 2,42

9a 3,35 30,25 31,30 0,95

10a 3,10 29,70 30,65 -0,99

12a 3,10 29,90 30,86 -0,37

15a 3,35 30,32 31,37 1,17

18a 3,07 29,82 30,76 -0,65

20a 3,18 30,33 31,33 1,04

21a 2,58 29,93 30,72 -0,77

23a 3,10 29,94 30,90 -0,25

24a 3,41 30,20 31,27 0,86

26a 2,77 30,59 31,46 1,44

27a 2,80 29,70 30,56 -1,27

28a 3,23 30,20 31,21 0,68

30a 2,91 30,47 31,38 1,21

32a 2,90 29,90 30,79 -0,56

33a 2,63 29,80 30,60 -1,12

35a 2,95 29,97 30,88 -0,30

36a 3,00 30,10 31,03 0,15

37a 2,75 30,30 31,16 0,53

38a 3,05 30,28 31,23 0,76

42a 3,19 30,18 31,17 0,58

49a 2,83 30,11 30,99 0,02

58a 2,50 29,80 30,56 -1,25

59a 2,67 30,04 30,86 -0,35

60a 2,96 29,73 30,64 -1,03

61a 3,20 29,70 30,68 -0,89

65a 3,10 29,90 30,86 -0,37

66a 2,96 29,67 30,58 -1,21

67a 3,30 29,70 30,71 -0,80

69a 2,80 30,53 31,41 1,29

71a 2,63 30,80 31,63 1,95

72a 2,82 30,45 31,33 1,06

76a 2,70 29,73 30,55 -1,27

79a 3,21 30,05 31,05 0,20

80a 3,50 30,51 31,62 1,91

82a 2,70 30,84 31,70 2,14

83a 2,96 30,14 31,06 0,24

88a 3,18 30,08 31,07 0,26

92a 3,40 29,80 30,85 -0,39

95a 3,40 29,40 30,43 -1,63

96a 3,17 29,96 30,94 -0,12

97a 3,12 29,72 30,68 -0,91

99a 3,10 29,80 30,75 -0,68

101a 2,77 30,03 30,89 -0,28

105a 2,90 29,90 30,79 -0,56

106a 2,82 30,11 30,98 0,0

108a 3,11 29,70 30,65 -0,98

109a 3,00 30,00 30,93 -0,16

110a 3,09 29,68 30,63 -1,06

112a 3,30 29,50 30,51 -1,42

117a 3,08 29,88 30,83 -0,45

124a 3,03 30,06 31,00 0,06

126a 2,75 30,50 31,36 1,1

131a 2,95 30,45 31,38 1,18

132a 2,83 30,14 31,02 0,11

135a 3,23 29,73 30,72 -0,77

136a 3,25 29,84 30,84 -0,41

137a 2,91 30,28 31,19 0,62

139a 3,26 30,20 31,22 0,71

143a 2,72 30,44 31,29 0,93

145a 3,31 29,80 30,82 -0,48

146a 3,20 30,40 31,40 1,27

151a 3,39 30,38 31,45 1,39

162a 3,47 30,28 31,37 1,16

165a 3,14 29,78 30,75 -0,70

166a 3,30 30,30 31,33 1,06

167a 3,33 29,67 30,69 -0,86

168a 2,18 29,88 30,55 -1,30

169a 3,50 29,70 30,78 -0,61

170a 2,70 29,80 30,63 -1,06

171a 2,86 29,45 30,32 -1,99

177a 2,07 30,53 31,18 0,58

179a 3,10 29,80 30,75 -0,68

178a 3,03 30,40 31,35 1,11

Number of results - 76 76 76 -

OUTLIERS - - 0 0 -

AVERAGE - 3,03 30,04 30,98 -

STD DEVIATION - - 0,33 0,33 -

MEDIAN 29,99 30,91

ROBUST AVERAGE - - 30,04 30,98 -

ROBUST STD DEVIATION - - 0,36 0,37 -

UoM 0,05 0,05

of 22

-3,00

-2,00

-1,00

0,00

1,00

2,00

3,00

Z-SC

OR

E

LABORATORY ID

ISO ASH Z-SCORE TREND

of 22 COAL CONCEPTS - PROFICIENCY TESTING -JANUARY 2019

ANALYTICAL PARAMETER : QUICK ASH (%)

LAB ID

MOISTURE IN ANALYSIS SAMPLE (%) AIR DRY (%) DRY BASE (%)

Z-SCORE (DRY BASE)

8a 2,80 30,00 30,86 -0,62

21a 2,58 29,88 30,67 -1,22

22a 3,12 29,95 30,91 -0,46

23a 3,10 30,11 31,07 0,03

24a 3,41 30,28 31,35 0,89

35a 2,95 29,80 30,71 -1,12

36a 3,00 29,90 30,82 -0,74

39a 2,83 30,45 31,34 0,86

41a 2,70 30,00 30,83 -0,72

49a 2,83 29,93 30,80 -0,82

50a 2,93 30,00 30,91 -0,49

63a 3,20 30,36 31,36 0,94

73a 2,53 31,43 32,25 3,69

74a 2,65 29,97 30,79 -0,87

77a 3,80 30,00 31,19 0,38

84a 3,05 30,37 31,33 0,82

92a 3,40 30,14 31,20 0,43

94a 3,48 30,70 31,81 2,32

101a 2,77 30,20 31,06 0,0

102a 2,70 30,00 30,83 -0,72

105a 2,90 30,10 31,00 -0,20

113a 3,59 29,98 31,10 0,10

122a 3,10 30,20 31,17 0,32

126a 2,75 30,20 31,05 -0,03

130a 3,60 30,30 31,43 1,15

131a 2,95 30,13 31,05 -0,05

132a 2,83 30,18 31,06 0,0

133a 2,93 30,23 31,14 0,25

136a 3,25 30,10 31,11 0,15

137a 2,91 30,19 31,09 0,10

138a 3,20 30,47 31,48 1,29

140a 3,68 30,18 31,33 0,84

143a 2,72 30,54 31,39 1,03

145a 3,31 29,90 30,92 -0,44

147a 2,68 29,40 30,21 -2,67

153a 3,05 29,50 30,43 -1,98

161a 2,90 30,20 31,10 0,12

162a 3,47 30,34 31,43 1,15

163a 3,70 29,90 31,05 -0,04

164a 3,05 30,20 31,15 0,27

165a 3,14 29,82 30,79 -0,86

168a 2,18 29,48 30,14 -2,89

169a 3,50 29,90 30,98 -0,25

176a 3,70 30,20 31,36 0,93

180a 1,97 30,33 30,94 -0,39

181a 3,40 30,50 31,57 1,59

182a 2,90 30,30 31,20 0,44

183a 3,60 30,10 31,22 0,50

184a 3,20 29,90 30,89 -0,55

185a 3,47 30,36 31,45 1,21


OUTLIERS - - 1 1 -

AVERAGE - 3,07 30,11 31,06 -


MEDIAN 30,13 31,07



UoM 0,05 0,06

-3,00

-2,00

-1,00

0,00

1,00

2,00

3,00

Z-SC

OR

E

LABORATORY ID

QUICK ASH Z-SCORE TREND

of 22


ANALYTICAL PARAMETER : ISO VOLATILE MATTER (%)

LAB ID MOISTURE IN ANALYSIS SAMPLE (%) AIR DRY DRY BASE Z-SCORE (DRY BASE)

1a 3,46 20,69 21,43 -0,69

6a 3,00 21,36 22,02 0,65

7a 3,33 17,72 18,33 -7,76

8a 2,80 21,50 22,12 0,88

9a 3,35 21,03 21,75 0,05

10a 3,10 21,10 21,78 0,09

12a 3,10 20,90 21,57 -0,38

15a 3,35 20,86 21,58 -0,34

18a 3,07 21,15 21,82 0,20

20a 3,18 20,95 21,64 -0,22

21a 2,58 21,15 21,71 -0,05

22a 3,12 20,78 21,45 -0,65

23a 3,10 20,86 21,52 -0,48

24a 3,41 20,80 21,53 -0,46

26a 2,77 24,52 25,22 7,95

27a 2,80 21,80 22,43 1,58

28a 3,23 22,20 22,94 2,76

30a 2,91 20,66 21,28 -1,04

32a 2,90 21,20 21,83 0,23

33a 2,63 21,13 21,70 -0,08

35a 2,95 21,42 22,07 0,77

36a 3,00 21,10 21,75 0,04

37a 2,75 22,38 23,01 2,91

38a 3,05 22,08 22,77 2,36

39a 2,83 21,55 22,18 1,01

41a 2,70 21,50 22,10 0,83

42a 3,19 21,20 21,90 0,38

49a 2,83 21,09 21,70 -0,07

50a 2,93 21,44 22,09 0,81

58a 2,50 21,00 21,54 -0,45

59a 2,67 18,90 19,42 -5,29

60a 2,96 20,95 21,59 -0,33

61a 3,20 21,10 21,80 0,15

63a 3,20 21,16 21,86 0,28

65a 3,10 21,20 21,88 0,33

66a 2,96 20,65 21,28 -1,04

67a 3,30 20,80 21,51 -0,51

69a 2,80 20,95 21,55 -0,41

71a 2,63 16,95 17,41 -9,88

72a 2,82 20,87 21,48 -0,59

73a 2,53 0,15 0,15 -49,26

74a 2,65 20,60 21,16 -1,32

76a 2,70 20,20 20,76 -2,22

77a 3,80 20,60 21,41 -0,73

79a 3,21 20,81 21,50 -0,53

80a 3,50 20,47 21,21 -1,19

82a 2,70 20,74 21,32 -0,96

83a 2,96 21,16 21,81 0,16

88a 3,18 21,20 21,90 0,37

92a 3,40 21,01 21,75 0,04

94a 3,48 20,68 21,42 -0,72

95a 3,40 21,10 21,84 0,25

96a 3,17 21,04 21,73 0,0

97a 3,12 20,80 21,47 -0,60

99a 3,10 20,30 20,95 -1,79

101a 2,77 20,91 21,51 -0,52

102a 2,70 21,70 22,30 1,30

105a 2,90 21,80 22,45 1,64

106a 2,82 20,92 21,53 -0,47

108a 3,11 20,82 21,49 -0,56

109a 3,00 20,70 21,34 -0,90

110a 3,09 21,18 21,86 0,28

112a 3,30 21,20 21,92 0,43

113a 3,59 20,28 21,04 -1,60

117a 3,08 21,05 21,72 -0,03

122a 3,10 21,10 21,78 0,09

124a 3,03 20,61 21,25 -1,10

126a 2,75 22,35 22,98 2,85

130a 3,60 20,70 21,47 -0,60

131a 2,95 21,43 22,08 0,79

132a 2,83 21,06 21,67 -0,14

133a 2,93 21,43 22,07 0,77

135a 3,23 20,92 21,61 -0,28

136a 3,25 21,07 21,78 0,10

137a 2,91 21,03 21,66 -0,17

138a 3,20 21,49 22,20 1,06

139a 3,26 20,28 20,96 -1,76

140a 3,68 21,47 22,29 1,27

143a 2,72 21,33 21,93 0,44

145a 3,31 21,00 21,72 -0,03

146a 3,20 20,10 20,76 -2,21

147a 2,68 21,05 21,63 -0,24

151a 3,39 20,89 21,62 -0,25

161a 2,90 21,00 21,63 -0,24

162a 3,47 20,87 21,62 -0,26

165a 3,14 21,21 21,90 0,37

166a 3,30 20,85 21,56 -0,39

167a 3,33 20,87 21,59 -0,33

168a 2,18 22,10 22,59 1,96

169a 3,50 20,70 21,45 -0,65

170a 2,70 21,30 21,89 0,36

179a 3,10 24,30 25,08 7,63

180a 1,97 22,20 22,65 2,08

181a 3,40 20,50 21,22 -1,17

182a 2,90 21,00 21,63 -0,24

183a 3,60 20,90 21,68 -0,12

184a 3,20 20,70 21,38 -0,80

NUMBER OF RESULTS - 97 97 97 -

OUTLIERS - - 6 6 -

AVERAGE - 3,05 21,07 21,73 -

STD DEVIATION - 0,45 0,44 -

MEDIAN 21,03 21,68



UoM - - 0,06 0,06 -

of 22

-3,00

-2,00

-1,00

0,00

1,00

2,00

3,00

76a

146a

99a

139a

113a

74a

80a

181a

124a

30a

66a

82a

109a

184a

77a

94a

1a 22a

169a

97a

130a

72a

108a

79a

101a

67a

23a

106a

24a

58a

69a

166a

12a

15a

167a

60a

135a

162a

151a

161a

182a

147a

20a

137a

132a

183a

33a

49a

21a

145a

117a

96a

92a

36a

9a 10a

122a

136a

61a

83a

18a

32a

95a

110a

63a

65a

170a

88a

165a

42a

112a

143a

6a 35a

133a

131a

50a

41a

8a 39a

138a

140a

102a

27a

105a

168a

180a

38a

28a

126a

37a

Z-SC

OR

E

LABORATORY ID

VOLATILE MATTER Z-SCORE TREND

of 22


ANALYTICAL PARAMETER : CALORIFIC VALUE (MJ/kg)

LAB ID MOISTURE IN ANALYSIS SAMPLE (%) AIR DRY (MJ/kg) DRY BASE (MJ/kg) Z-SCORE (DRY BASE)

1a 3,46 20,83 21,58 0,24

6a 3,00 20,94 21,59 0,29

8a 2,80 20,75 21,35 -0,69

9a 3,35 21,00 21,72 0,85

10a 3,10 20,91 21,58 0,25

12a 3,10 20,89 21,56 0,17

18a 3,07 20,86 21,52 0,0

20a 3,18 21,06 21,75 0,96

21a 2,58 20,83 21,38 -0,55

23a 3,10 20,88 21,54 0,11

24a 3,41 20,78 21,51 -0,01

27a 2,80 20,51 21,10 -1,70

28a 3,23 21,02 21,72 0,84

30a 2,91 20,81 21,43 -0,34

32a 2,90 20,75 21,37 -0,60

33a 2,63 20,96 21,53 0,04

35a 2,95 20,90 21,54 0,08

36a 3,00 20,61 21,25 -1,10

37a 2,75 20,75 21,34 -0,73

38a 3,05 21,04 21,70 0,75

39a 2,83 21,48 22,10 2,38

42a 3,19 20,70 21,38 -0,55

49a 2,83 20,90 21,51 -0,03

50a 2,93 20,48 21,10 -1,71

58a 2,50 20,90 21,44 -0,33

60a 2,96 20,87 21,51 -0,04

63a 3,20 20,52 21,20 -1,30

65a 3,10 21,12 21,80 1,14

66a 2,96 20,92 21,56 0,17

71a 2,63 20,54 21,09 -1,72

72a 2,82 20,44 21,03 -1,97

73a 2,53 21,42 21,98 1,87

74a 2,65 20,79 21,35 -0,66

76a 2,70 20,73 21,31 -0,86

77a 3,80 20,88 21,70 0,77

79a 3,21 20,24 20,91 -2,47

80a 3,50 21,07 21,83 1,30

82a 2,70 21,11 21,69 0,71

83a 2,96 20,88 21,52 0,00

84a 3,05 20,85 21,51 -0,04

88a 3,18 20,89 21,57 0,23

92a 3,40 19,93 20,63 -3,61

94a 3,48 20,95 21,71 0,77

95a 3,40 20,64 21,37 -0,61

96a 3,17 20,89 21,57 0,23

97a 3,12 21,04 21,72 0,82

99a 3,10 20,96 21,63 0,47

101a 2,77 20,70 21,29 -0,93

102a 2,70 21,63 22,23 2,91

105a 2,90 20,78 21,40 -0,47

106a 2,82 21,01 21,62 0,42

108a 3,11 20,91 21,58 0,26

109a 3,00 20,91 21,56 0,16

110a 3,09 21,01 21,68 0,67

112a 3,30 20,76 21,47 -0,20

117a 3,08 21,07 21,74 0,91

122a 3,10 21,08 21,75 0,97

124a 3,03 20,83 21,48 -0,15

126a 2,75 20,78 21,37 -0,61

130a 3,60 20,93 21,71 0,80

131a 2,95 20,83 21,46 -0,22

132a 2,83 20,73 21,33 -0,75

133a 2,93 21,39 22,03 2,11

135a 3,23 20,64 21,33 -0,77

136a 3,25 20,31 20,99 -2,14

137a 2,91 20,77 21,39 -0,51

140a 3,68 20,96 21,76 1,00

143a 2,72 20,67 21,25 -1,10

145a 3,31 20,95 21,67 0,61

147a 2,68 20,91 21,49 -0,13

153a 3,05 20,73 21,38 -0,55

161a 2,90 20,80 21,42 -0,39

162a 3,47 21,74 22,52 4,10

163a 3,70 20,69 21,48 -0,13

164a 3,05 20,95 21,61 0,38

165a 3,14 21,03 21,71 0,80

167a 3,33 20,93 21,65 0,55

168a 2,18 20,81 21,27 -0,99

169a 3,50 20,68 21,43 -0,35

170a 2,70 20,93 21,51 -0,02

171a 2,86 20,28 20,88 -2,61

172a 3,77 20,42 21,22 -1,21

176a 3,70 20,95 21,75 0,97

177a 2,07 20,95 21,39 -0,50

179a 3,10 21,23 21,91 1,60

180a 1,97 21,19 21,62 0,41

181a 3,40 20,94 21,68 0,65

182a 2,90 21,29 21,93 1,67

183a 3,60 20,77 21,55 0,12

184a 3,20 20,69 21,37 -0,58

186a 3,15 20,81 21,49 -0,12

NUMBER OF RESULTS - 91 91 91 -

OUTLIERS - - 2 2 -

AVERAGE - 3,04 20,86 21,52 -


MEDIAN 20,88 21,52



UoM - - 0,03 0,03 -

of 22

-3,00

-2,00

-1,00

0,00

1,00

2,00

3,00

171a

79a

136a

72a

71a

50a

27a

63a

172a

36a

143a

168a

101a

76a

135a

132a

37a

8a 74a

95a

126a

32a

184a

21a

42a

153a

137a

177a

105a

161a

169a

30a

58a

131a

112a

124a

163a

147a

186a

84a

60a

49a

170a

24a

83a

18a

33a

35a

23a

183a

109a

66a

12a

88a

96a

1a 10a

108a

6a 164a

180a

106a

99a

167a

145a

181a

110a

82a

38a

77a

94a

130a

165a

97a

28a

9a 117a

20a

122a

176a

140a

65a

80a

179a

182a

73a

133a

39a

102aZ-

SCO

RE

LABORATORY ID

CALORIFIC VALUE Z-SCORE TREND

of 22


ANALYTICAL PARAMETER : TOTAL SULPHUR (%)

LAB ID MOISTURE IN ANALYSIS SAMPLE (%) AIR DRY DRY BASE Z-SCORE (DRY BASE)

1a 3,46 1,15 1,19 0,52

6a 3,00 1,14 1,18 0,39

7a 3,33 0,27 0,28 -6,66

9a 3,35 1,13 1,17 0,34

10a 3,10 1,09 1,12 0,00

12a 3,10 1,14 1,18 0,40

15a 3,35 1,14 1,18 0,43

18a 3,07 1,14 1,18 0,40

21a 2,58 0,96 0,99 -1,10

23a 3,10 1,15 1,19 0,48

24a 3,41 1,21 1,25 1,00

26a 2,77 0,94 0,97 -1,25

27a 2,80 1,00 1,03 -0,76

28a 3,23 0,85 0,88 -1,94

30a 2,91 1,17 1,21 0,63

36a 3,00 1,04 1,07 -0,42

37a 2,75 1,49 1,53 3,20

38a 3,05 1,02 1,05 -0,58

39a 2,83 1,26 1,30 1,35

42a 3,19 1,27 1,31 1,47

49a 2,83 1,13 1,16 0,29

50a 2,93 3,01 3,10 15,54

58a 2,50 1,10 1,13 0,0

60a 2,96 1,14 1,17 0,39

61a 3,20 1,21 1,25 0,98

65a 3,10 0,81 0,84 -2,28

66a 2,96 1,15 1,19 0,47

69a 2,80 1,10 1,13 0,0

71a 2,63 1,10 1,13 0,0

72a 2,82 1,15 1,18 0,46

74a 2,65 1,12 1,15 0,20

76a 2,70 0,95 0,98 -1,17

79a 3,21 1,13 1,17 0,33

80a 3,50 1,20 1,24 0,93

83a 2,96 1,20 1,24 0,87

88a 3,18 1,18 1,22 0,73

92a 3,40 0,88 0,91 -1,69

95a 3,40 1,08 1,12 -0,06

97a 3,12 1,14 1,18 0,40

99a 3,10 1,09 1,12 0,00

101a 2,77 1,23 1,27 1,10

106a 2,82 1,21 1,25 0,94

108a 3,11 1,09 1,12 0,00

109a 3,00 1,13 1,16 0,31

110a 3,09 1,14 1,18 0,40

112a 3,30 1,01 1,04 -0,64

113a 3,59 1,18 1,22 0,77

122a 3,10 0,95 0,98 -1,14

124a 3,03 1,03 1,06 -0,50

126a 2,75 0,92 0,95 -1,41

130a 3,60 1,06 1,10 -0,20

131a 2,95 1,12 1,15 0,22

132a 2,83 0,92 0,95 -1,41

133a 2,93 1,10 1,13 0,00

135a 3,23 1,36 1,41 2,20

136a 3,25 0,88 0,91 -1,70

137a 2,91 1,00 1,03 -0,75

138a 3,20 1,10 1,14 0,09

139a 3,26 1,09 1,13 0,0

140a 3,68 0,91 0,94 -1,42

143a 2,72 1,13 1,16 0,28

145a 3,31 1,19 1,23 0,83

146a 3,20 1,23 1,27 1,14

151a 3,39 1,02 1,06 -0,55

161a 2,90 0,96 0,99 -1,08

162a 3,47 1,11 1,15 0,19

165a 3,14 0,93 0,96 -1,30

167a 3,33 1,10 1,14 0,10

168a 2,18 1,04 1,06 -0,49

169a 3,50 1,05 1,09 -0,29

172a 3,77 0,74 0,77 -2,80

177a 2,07 1,23 1,26 1,03

179a 3,10 1,20 1,24 0,89

180a 1,97 1,03 1,05 -0,59

183a 3,60 1,08 1,12 -0,04

186a 3,15 1,12 1,16 0,24

NUMBER OF RESULTS 76 76 76 -

OUTLIERS - - 2 2 -

AVERAGE - 3,06 1,09 1,13 -

MEDIAN - 1,11 1,14




UoM - - 0,02 0,02

of 22

-3,00

-2,00

-1,00

0,00

1,00

2,00

3,00

172a

65a

28a

136a

92a

140a

126a

132a

165a

26a

76a

122a

21a

161a

27a

137a

112a

180a

38a

151a

124a

168a

36a

169a

130a

95a

183a

10a

99a

108a

133a

139a

58a

71a

69a

138a

167a

162a

74a

131a

186a

143a

49a

109a

79a

9a 60a

6a 18a

110a

12a

97a

15a

72a

66a

23a

1a 30a

88a

113a

145a

83a

179a

80a

106a

61a

24a

177a

101a

146a

39a

42a

135a

37a

Z-SC

OR

E

LABORATORY ID

TOTAL SULPHUR Z-SCORE TREND


ANALYTICAL PARAMETER : PHOSPHOROUS IN COAL (%)

LAB ID

MOISTURE IN ANALYSIS SAMPLE (%) AIR DRY DRY BASE

Z-SCORE (DRY BASE)

1a 3,46 0,076 0,079 0,21

7a 3,33 0,104 0,107 1,90

9a 3,35 0,080 0,083 0,44

12a 3,10 0,070 0,072 -0,17

18a 3,07 0,089 0,092 0,98

21a 2,58 0,083 0,085 0,59

23a 3,10 0,065 0,067 -0,48

24a 3,41 0,075 0,077 0,11

26a 2,77 0,053 0,054 -1,24

69a 2,80 0,049 0,050 -1,46

67a 3,30 0,081 0,084 0,50

74a 2,65 0,058 0,060 -0,92

108a 3,11 0,075 0,077 0,13

109a 3,00 0,073 0,075 0,00

113a 3,59 0,066 0,068 -0,40

112a 3,30 0,098 0,101 1,54

114a 3,05 0,079 0,081 0,37

138a 3,20 0,060 0,062 -0,78

139a 3,26 0,044 0,045 -1,74

146a 3,20 0,047 0,049 -1,56

169a 3,50 0,101 0,105 1,73

172a 3,77 0,072 0,075 0,0

177a 2,07 0,078 0,080 0,26


OUTLIERS - - 0 0 -

AVERAGE - 3,13 0,073 0,075 -

STD DEVIATION - - 0,016 0,017 -

MEDIAN - 0,075 0,077

ROBUST AVERAGE - - 0,073 0,075

ROBUST STD DEVIATION - - 0,018 0,019

UoM - - 0,005 0,005

-3,00

-2,00

-1,00

0,00

1,00

2,00

3,00

139a 146a 69a 26a 74a 138a 23a 113a 12a 172a 109a 24a 108a 1a 177a 114a 9a 67a 21a 18a 112a 169a 7a

Z-SC

OR

ES

LAB ID

PHOSPHOROUS IN COAL Z-SCORES


ANALYTICAL PARAMETER : TOTAL CARBON (%)

LAB ID


Z-SCORE (DRY BASE)

1a 3,46 54,01 55,95 0,11

9a** 3,35 45,38 46,95 -10,10

18a 3,07 53,41 55,10 -0,85

21a** 2,58 55,64 57,11 1,44

42a 3,19 54,62 56,42 0,65

49a 2,83 54,67 56,26 0,47

66a** 2,96 53,00 54,62 -1,40

88a 3,18 53,84 55,61 -0,27

99a 3,10 53,80 55,52 -0,37

108a 3,11 53,95 55,68 -0,19

109a 3,00 53,70 55,36 -0,55

145a** 3,31 55,70 57,61 2,00

177a 2,07 53,80 54,94 -1,03


OUTLIERS - - 1 1 -

AVERAGE - 3,02 54,18 55,85 -

MEDIAN - - 53,90 55,65 -




UoM - - 0,35 0,35

REPRODUCIBILITY

UPPER LIMIT - - - 56,85 -

LOWER LIMIT - - - 54,85 -


ANALYTICAL PARAMETER : HYDROGEN (%)

LAB ID


Z-SCORE (DRY BASE)

1a 3,46 2,81 2,91 -0,04

9a 3,35 2,58 2,67 -1,57

18a 3,07 2,76 2,85 -0,44

21a 2,58 2,75 2,82 -0,60

36a 3,00 2,64 2,72 -1,24

42a 3,19 2,84 2,93 0,11

88a 3,18 2,96 3,06 0,89

99a 3,10 2,85 2,94 0,16

108a 3,11 2,86 2,95 0,22

109a 3,00 2,89 2,98 0,40

177a** 2,07 3,18 3,25 2,10

Number of results 11 11 11

OUTLIERS - - 0 0 -

AVERAGE - 3,01 2,83 2,92 -

MEDIAN - 2,84 2,93 -




UoM - - 0,05 0,06

REPRODUCIBILITY




ANALYTICAL PARAMETER : NITROGEN(%)

LAB ID


Z-SCORE (DRY BASE)

1a 3,46 1,23 1,27 -0,73

9a 3,35 1,26 1,30 -0,11

18a 3,07 1,33 1,37 1,35

42a 3,19 1,33 1,37 1,38

88a** 3,18 1,04 1,07 -4,98

99a 3,10 1,23 1,27 -0,83

108a 3,11 1,26 1,30 -0,17

109a 3,00 1,29 1,33 0,45

177a 2,07 1,22 1,25 -1,34

Number of results 9 9 9 -

OUTLIERS - - 1 1 -

AVERAGE - 3,06 1,27 1,31 -

MEDIAN - 1,26 1,30 -


REPRODUCIBILITY



of 22


ANALYTICAL PARAMETER : ASH FUSION TEMPERATURES (oC)

LAB ID DEFORMATION SOFTENING HEMISPHERE FLOW

1a 1357 1373 1390 1448

9a 1400 1420 1430 1470

10a 1350 1370 1390 1420

21a 1360 1375 1390 1430

23a 1359 1389 1433 1500

38a 1370 1410 1420 1450

42a 1350 1370 1390 1410

49a 1340 1370 1430 1490

60a 1368 1395 1428 1479

80a 1370 1410 1430 1470

95a 1340 1357 1370 1397

99a 1398 1425 1460 1500

108a 1350 1360 1370 1420

109a 1360 1370 1390 1440

112a 1340 1350 1360 1400

Number of results 15 15 15 15

Outliers 0 0 0 0

AVERAGE 1361 1383 1405 1448

MEDIAN 1359 1373 1390 1448

STDEV 19 24 29 35

REPRODUCIBILITY

UPPER LIMIT 1441 1443 1465 1500

LOWER LIMIT 1281 1323 1345 1368

Z-SCORES

LAB ID DEFORMATION SOFTENING HEMISPHERE FLOW

1a -0,21 -0,42 -0,53 -0,01

9a 2,12 1,56 0,84 0,62

10a -0,58 -0,54 -0,53 -0,80

21a -0,04 -0,33 -0,53 -0,52

23a -0,10 0,26 0,94 1,47

38a 0,50 1,14 0,50 0,05

42a -0,58 -0,54 -0,53 -1,09

49a -1,12 -0,54 0,84 1,18

60a 0,39 0,51 0,77 0,87

80a 0,50 1,14 0,84 0,62

95a -1,12 -1,09 -1,21 -1,45

99a 2,01 1,77 1,86 1,47

108a -0,58 -0,97 -1,21 -0,80

109a -0,04 -0,54 -0,53 -0,23

112a -1,12 -1,39 -1,55 -1,37

of 22


ANALYTICAL PARAMETER : ASTM ASH (%)

LAB ID


Z-SCORE (DRY BASE)

1a 3,46 29,95 31,02 0,26

108a 3,11 29,90 30,86 -0,54

109a 3,00 30,00 30,93 -0,20

172a 3,77 30,11 31,29 1,56

186a 3,15 29,78 30,75 -1,08


OUTLIERS - - 0 0 -

AVERAGE - 3,30 29,95 30,97 -


MEDIAN - - 29,95 30,93 -


ANALYTICAL PARAMETER : ASTM VOLS (%)

LAB ID


Z-SCORE (DRY BASE)

1a 3,46 21,33 22,09 -1,46

108a 3,11 21,60 22,29 0,78

109a 3,00 21,60 22,27 0,49

172a 3,77 20,34 21,14 -12,21

186a 3,15 21,54 22,24 0,18


OUTLIERS - - 1 1 -

AVERAGE - 3,30 21,52 22,22 -


MEDIAN - - 21,57 22,25 -


ANALYTICAL PARAMETER : FLUORINE (ppm)

LAB ID


Z-SCORE (DRY BASE)

12a 3,10 190 196 -0,31

108a 3,11 174 180 -0,86

109a 3,00 191 197 -0,28

177a 2,07 244 249 1,45


OUTLIERS - - -

AVERAGE - 2,82 200 205 -

STD DEVIATION - - 31 30 -

MEDIAN - - 191 196 -


ANALYTICAL PARAMETER: CHLORINE (ppm)

LAB ID


Z-SCORE (DRY BASE)

12a 3,10 70 72 -0,50

108a 3,11 63 65 -0,69

109a 3,00 78 80 -0,29

177a 2,07 145 148 1,48


OUTLIERS - - 0 0 -

AVERAGE - 2,82 89 91 -

STD DEVIATION - - 38 38 -

MEDIAN - - 74 76 -

of 22

CONCLUSION

1. The overall ISO Ash determination trend was negatively biased. The average, robust average and median were similar.

2. The overall ISO volatile determination trend was almost positively biased. Six outliers were detected. These

seemed to be due to possible swopped samples and analytical errors. The average, robust average and

median were similar

3. Calorific value graph indicated an almost even z-score trend. Two outliers were detected. These seemed to

be due to possible swopped samples or analytical errors

4. Sulphur determination trend was positively biased. This indicated that participates reported results that

were generally higher than the average value. The average, robust average and median were similar

5. Phosphorus: The median, robust average and mean compared well with each other indicating that the extreme values did not affect the centralized values.

6. Carbon, Hydrogen and Nitrogen analysis was well done. One outlier was detected on Carbon and Nitrogen.

7. AFT results were generally well done.

8. Assessment criterion for homogeneity check (From ISO 13528, page 45)

8.1 Comparison of the between sample standard deviation with the standard deviation for proficiency testing Standard deviation for ISO ash =0.33 Check value = 0.33 x 0.3 = 0.099

Between sample standard deviation = 0.031 The between standard deviation is less than the check value for the criterion assessment for

homogeneity, therefore homogeneity has been established.

of 22

COAL CONCEPTS: Terms and Conditions

Return of results: Laboratories participate in proficiency testing programs on the understanding that they will be sharing their results and information anonymously with other laboratories performing the same analysis. No return of results compromises the spirit of the programs, and reports will not be sent to laboratories unless they return results. Payment in full is required from all laboratories enrolling whether they return results or not. Errors in Participant Proficiency Testing Results: Proficiency testing reports should reflect the level of accuracy that a regular testing client would receive. If a participant finds an error in their proficiency testing results, they may notify us in writing and change their submission PRIOR to the due date for return. Changes after this time will not be accepted. Coal Concepts’ reports results as submitted by participants. On occasion, it seems as though participants have mixed up the samples or not processed the samples according to the instructions. Coal Concepts cannot make assumptions of this nature and change results 'to suit'. We also cannot compromise the integrity of the programs by suggesting to some participants that they should review their results prior to the due date. (This is unfair to other participants) It is the responsibility of the participants to check all aspects of the program, including sample identification, preparation, testing instructions, calculations and reporting of the results prior to results submission. If samples are not in good condition on arrival to the participant laboratory, Coal Concepts must be notified in writing IMMEDIATELY, as often samples can be replaced in good time. Claims about samples received in bad condition will not be accepted after the report has been issued. Late Enrolments and Late Results: Late enrolment requests cannot always be accommodated, as sample manufacture must be scheduled well in advance to the shipping date of the program to allow all necessary quality assurance activities to be carried out. Shipping of PT materials and evaluating test results from PTPs out of cycle with the mainstream programs is considerably time consuming and therefore costly. In order not to disadvantage participants able to comply with time frames, Coal Concepts may charge a late fee in the following circumstances: Requests that Coal concepts staff enters results on behalf of participants Requests to record results after the due date Requests for PTP participation that is out of cycle with the scheduled dates Shipping fees and Customs clearance: Costs incurred for shipping samples and clearance of same through customs are the responsibility of the participating laboratory unless otherwise indicated Non-payment of fees: Coal Concepts retains the right to withhold reports and/or test materials and services when invoices are outstanding. Confidentiality of results: All data and information received by Coal Concepts from its clients are considered confidential unless the client has given express permission to pass on information. Definitions: The dictionary definitions of “collusion” and “falsification” are as follows. · Collusion: A secret agreement or cooperation for a fraudulent or deceitful purpose. · Falsification: Deliberately changing something to be false. In proficiency testing terms, collusion is comparing data (and perhaps changing data) to fit in with a believed “correct” result. This is contrary to the spirit of proficiency testing programs, which are issued with the intention of providing an objective comparison of a laboratory’s performance with others. Coal Concepts tries to minimise the occurrence of collusion by being aware that laboratories should be objective when they report their results, and should therefore not know the intended results at the time they are reporting to us. Answers are not provided to clients until results have been submitted. To prevent collusion and falsification our advice to clients is: DON’T confer with others about PT samples or results. DO accept the fact that everyone makes errors. DON’T average the results or opinions of every person in the laboratory before selecting the answer to be submitted. Instead, use one of the answers AS SUBMITTED to you and take advantage of the Coal Concepts internal QA services and submit all answers generated by the technicians. DO have confidence in your own results. Proficiency Testing (PT) is a compulsory part of laboratory accreditation, but it is also an important tool for giving you confidence in your results. “Enhancing” your PT results with assistance from another participant cannot increase confidence in your laboratory’s performance. Coal concepts’ testing staff are not told what the expected results are, nor what we are expecting. We subject ALL results to analysis, even if they are different. The staff have the right to check that the results we enter on their behalf are correctly transcribed. Clients are always welcome to contact Coal Concepts to seek advice or information about collusion or falsification of data. Policy for Participant Appeal of PT Performance Assessment: If participants disagree with their performance assessment in a proficiency report, they should inform Coal Concepts in writing. The response will include Coal Concepts interpretation of the outcome of the reassessment and an explanation of that outcome. (For example, explanation of a calculation, or the rationale for the outcome of the evaluation.) If a mistake has been made by Coal Concepts, it will be dealt with via Coal Concepts’ non-conformance system. Liability In no event shall a party's liability to the other party for direct damages exceed an amount equal to the value of the amount for the PT Programme, under that specific month End of report

coal concepts proficiency testing general analysis …

Documents