Results 5.1 5,970 PT. Bayan Resources Tbk - Prospectus

Seam kt Ash TS CV kcalkg ar ar gar 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,100 3.2 0.4 5,940 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,300 7.7 1.2 5,715 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700 9.0 5.0 5,510 8_2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,300 6.0 0.3 6,015 8_3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 3.6 0.3 6,210 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 5.4 1.1 5,935 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,100 5.9 0.8 6,005 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,900 5.2 1.7 5,985 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,500 3.2 0.8 6,155 15_1 . . . . . . . . . . . . . . . . . . . . . . . . . . 100 6.8 2.9 5,795 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700 4.4 1.5 5,980 TotalAve . . . . . . . . . . . . . . . . . . . . . 33.3 Mt

5.1 1.1

5,970 Note: Estimates have been rounded to reflect accuracy Note : Coal qualities reported for Coal Reserves vary from the qualities reported for Coal Resources see Table 4.2 and 4.3 due to two principal factors. Firstly, the Coal Resource qualities are based on the whole coal deposit while Coal Reserves qualities are only for coal within the Mineable Pit Shell. Secondly, Coal Reserve qualities have also been modified by coal losses and dilution factors.

5.13 Summary Table of Model Data

Table 5.3 shows the geological models and modeling data used for the estimate. They have been grouped together to provide an audit trail and to facilitate updates. Table 5.3—Summary of Model Data TSA Geological Model . . . . . . . . . . . . . . . . . . . . . . . . . TSAutm_Mod0907.grd Quality Model . . . . . . . . . . . . . . . . . . . . . . . . . . . TSA_Qual0907.grd Optimiser Shell Selected . . . . . . . . . . . . . . . . . . . OPT 100 Pit Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . used OPT100 as Pitshell ROM Coal In Pit Shell incl non JORC . . . . . . . Mt Rom 107 Average Strip Ratio . . . . . . . . . . . . . . . . . . . . . . . bcmt ROM 13.0 Cut off ratio used for estimate . . . . . . . . . . . . . . . bcmt ROM 15.6 Breakeven Strip Ratio . . . . . . . . . . . . . . . . . . . . . bcmt ROM 21.1 Highwall slopes . . . . . . . . . . . . . . . . . . . . . . . . . . 30.0 Lowwall slopes . . . . . . . . . . . . . . . . . . . . . . . . . . 30.0 A-133 PT Wahana Baratama Mining WAHANA OPEN CUT COAL DEPOSIT STATEMENT OF OPEN CUT COAL RESOURCES AND RESERVES AS AT 31 st March 2008. May 2008 Job 3318f_Wahana_May A-134