e. PT Bhakti Energi Persada 46.9
O UR
W OR
L D
O UR
TH O
U g
HT s
O UR
B U
s IN
E s
s
O UR
PE O
PL E
O UR
C O
M M
U N
IT IE
s O
UR g
O v
ERN A
N C
E O
UR IN
v E
s T
O R
s O
UR F
INAN C
E s
OU R
B US
IN E
S S
Coal resource quality as at June 30, 2011 Calculated quality changes to Adaro Energys
metallurgical coal resources 2012 vs. 2011 Notes
Ash adb Volatile matter adb
Total sulphur adb Ash adb
Volatile matter adb Total sulphur adb
1 Based on BHP Billitons 2012 Annual Report with the permission
of BHP Billiton. 4.2
28.5 0.55
- -
- -
- -
4.7 39.2
0.98 -
- -
3.6 18.7
0.72 -
- -
3.4 18.8
0.56 -
- -
4.5 17.4
0.80 -
- -
4.5 27.7
0.49 -
- -
Calculated as at Dec. 31, 2011
1
Calculated quality changes to Adaro Energy coal resources 2012 vs. 2011 Notes
Moisture in the analysis
sample adb
Ash adb Volatile
matter adb
Total sulphur adb
Calorific value Kcal
kg adb Moisture in
the analysis
sample adb
Ash adb Volatile
matter adb
Total sulphur adb
Calorific value Kcal
kg adb
1 2011 Adaro Indonesia coal quality estimates are restatements of the
quality in Adaro Indonesias 2010 JORC Coal Resources and Reserves
statement
2 PT Adaro Indonesias coal quality samples have been analysed to AsTM
standards 3 PT Bhakti Energi Persadas coal
quality samples have been analysed to AsTM standards
4 PT Mustika Indah Permais coal quality samples have been analysed to
IsO standards 5 The Adaro Energy group coal
quality was derived by combining the coal quality parameters of the Coal
Resources of the component operating companies using weight averaging
6 The Adaro Energy group coal quality was derived by combining the
coal quality parameters of the Coal Resources of the component operating
companies using weight averaging. 17.6
2.1 41.2
0.11 5,563
1.5 0.1
-0.7 0.01
-127 16.9
3.3 41.0
0.23 5,799
2.2 -0.1
-2.6 0.09
-356 south Paringin was not included in 2011 Resources
19.1 3.8
40.3 0.28
5,278 2.5
- -1.2
0.01 -165
19.3 4
41.4 0.28
5,215 -0.5
0.4 0.2
0.05 47