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HSBC HOLDINGS PLC 8 CANADA SQUARE, LONDON, E14 5HQ UNITED KINGDOM PHONE: +44 (0)20 7991 8888 FAX: +44 (0)20 7992 4880 SWIFT CODE: MIDL GB22, TELEX: 888401

BANK GUARANTEE
GUARANTEE NUMBER : BH 5832 CURRENCY : EUROS PRINCIPLE AMOUNT : 10.000.000,00 (TEN MILLON EUROS) TREASURY DEPT NUMBER : TD201045715 IMF REG. NUMBER : LQ20105104 DATE OF ISSUE : APRIL 01ST , 2010 MATURITY DATE : APRIL 02nd ,2011 BENEFICIARY : RHR ROCK&HYDRO RESOURCES CIA. LTDA. WE, THE UNDERSIGNED HSBC HOLDINGS PLC, 8 CANADA SQUARE, LONDON ENGLAND E14 5HQ, UNITED KINGDOM, HEREBY IRREVOCABLY AND UNCONDITIONALLY WITHOUT PROTEST OR NOTIFICATION, PROMISE TO PAY AGAINST THIS BANK GUARANTEE TO THE ORDER OF RHR ROCK&HYDRO RESOURCES CIA. LTDA.. WITH BUSINESS AND POSTAL ADDRESS AT PASAJE A N59-387 Y ANGEL LUDEÑA POB 171744QUITO-ECUADOR THE BEARER OR HOLDER THEREOF AT MATURITY, THE SUM OF TEN MILLION EUROS (10.000.000,00). IN THE LAWFUL CURRENCY OF EUROPEAN UNION, UPON PRESENTATION AND SURRENDER OF THIS GUARANTEE AT THE COUNTER OF THE ISSUING HSBC HOLDINGS PLC.. 8 CANADA SQUARE, LONDON ENGLAND E 145HQ, UNITED KINGDOM. SUCH PAYMENT WILL BE MADE WITHOUT SET-OFF AND FREE AND CLEAR OF ANY DEDUCTIONS OF CHARGES, FEES ORWITHHOLDINGS OF ANY NATURE, NOW OR HEREINAFTER IMPOSED. LEVIED. COLLECTED, WITHHELD OR ASSIGNED BY THE GOVERNMENTS OF THE EUROPEAN UNION, OR ANY POLITICAL SUBDIVISION OR AUTHORITY THEREOF OR THEREIN. THIS GUARANTEE IS TRANSFERRABLE AND SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE EUROPEAN UNION. THIS GUARANTEE IS SUBJECT TO THE UNIFORM CUSTOMS AND PRACTICE, PUBLICATION NUMBER ICC 500 LASTESTREVISION. ALL CHARGES ARE FOR THE ACCOUNT OF THE APPLICANT THIS GUARANTEE EXPIRES ON APRIL 02nd , 2011 DATE OF SIGNATURE APRIL 01ST , 2010 FOR AND ON BEHALF OF HSBC HOLDINGS PLC 8 CANADA SQUARE, LONDON E14 5HQ, UNITED KINGDOM

8 CANADA SQUARE, LONDON, E14 5HQ UNITED KINGDOM PHONE: +44 (0)20 7991 8888 FAX: +44 (0)20 7992 4880 SWIFT CODE: MIDL GB22, TELEX: 888401

DATE NUMBER REFERENCE

: : :APRIL 01ST , 2010 BH 5832 BANK GUARANTEE CONFIRMATION LETTER

DEAR SIR, WE, HSBC HOLDINGS PLC., 8 CANADA SQUARE, LONDON E14 5HQ, UNITED KINGDOM, DO HEREBY CONFIRM WITH FULL BANK RESPONSIBILITY THE FOLLOWING ISSUANCE. BANK NAME HSBC HOLDINGS PLC 8 CANADA SQUARE LONDON E14 5HQ, UNITED KINGDOM OFFICER TO BE CONTACTED : M F GEOGHEGAN, CBE, (DIRECTOR &CEO) FACSIMILE NUMBER : +44(0)20 7991 8888TELEX NUMBER : +44(0)20 7992 4880 SWIFT CODE : MIDL GB22 TYPE : BANK GUARANTEE NUMBER : BH 5832 AMOUNT : 10.000.000,00 (TEN MILLION) REGISTRATION ON HSBC SCREEN : ACCESS CODE H.B.C.B.G832*HB SECURITY CODE 538878 WDS37 ID NUMBER HSBC-WDS-4123965-355786-2010 TREASURY DEPT NUMBER : TD201045715 IMF REG. NUMBER : LQ20105104 DATE OF ISSUE : APRIL 01ST , 2010 MATURITY DATE : APRIL 02nd , 2011 BENEFICIARY :RHR ROCK&HYDRO RESOURCES CIA. LTDA. PASAJE A N59-387 Y ANGEL LUDEÑA POB 171744 QUITO-ECUADOR WE CONFIRM WITH FULL BANK RESPONSIBILITY THAT THIS GUARANTEE IS REGISTERED WITH US AND CAN BE AUTHENTICATED THROUGH OUR BANK. FOR AND ON BEHALF OF HSBC HOLDINGS PLC 8 CANADA SQUARE, LONDON E14 5HQ, UNITED KINGDOM :

8 CANADA SQUARE, LONDON, E14 5HQ UNITED KINGDOM PHONE: +44 (0)20 7991 8888 FAX: +44(0)20 7992 4880 SWIFT CODE: MIDL GB22, TELEX: 888401

LETTER OF AUTHENTICATION NUMBER DATE REFERENCE : : : BH 5832 APRIL 01ST , 2010 BANK GUARANTEE

DEAR SIR, WE, HSBC HOLDINGS PLC., 8 CANADA SQUARE, LONDON E14 5HQ, UNITED KINGDOM. HEREBY IRREVOCABLY CONFIRM WITH FULL BANK RESPONSIBILITY THE ISSUEANCE OF THE FOLLOWING:

GUARANTEE NUMBER CURRENCY PRINCIPLE AMOUNT TREASURY DEPT NUMBER IMF REG.NUMBER DATE OF ISSUE MATURITY DATE BENEFICIARY

: BH 5832 : EUROS : 10.000.000,00 (TEN MILLON EUROS) : TD201045715 : LQ20105104 : APRIL 01ST , 2010 : APRIL 02nd , 2011 : RHR ROCK&HYDRO RESOURCES CIA. LTDA. PASAJE A N59-387 Y ANGEL LUDEÑA POB 171744 QUITO-ECUADOR

FOR AND ON BEHALF OF HSBC HOLDINGS PLC 8 CANADA SQUARE, LONDON E14 5HQ, UNITED KINGDOM

8 CANADA SQUARE, LONDON, E14 5HQ UNITED...