Reference is made to the 14 December 2007 announcement, reference number 07-51015B, inviting submission of qualifications and proposal data to provide technical assistance on the Geothermal Power Generation Project. On January 9, 2007, a request from a prospective Offeror was received to provide a list of potential host-country technical specialists and subcontractors. The following list, prepared by the U.S. Foreign Commercial Service and ISAGEN S.A. E.S.P. in coordination with USTDA, is provided for information purposes only and is not intended as an endorsement of any firms or individuals by USTDA or by the Grantee, or a complete list of all potential host-country subcontractors. USTDA is sharing this information for the benefit of all prospective bidders. The response date remains unchanged. Interested U.S. firms should submit their Proposal in English and Spanish directly to the Grantee by 4:00 PM (local time in Medellin, Colombia), February 14, 2008, at the above address. Proyecto Geotermico en Colombia Firmas Consultoras Empresa Pagina WEB/e-mail Telefono Ciudad Aene Consultoria S.A. http://www.aene.com.co (571) 621-0211 Bogota Bohorquez Ingenieria LTDA http://www.bohorquez-eng.com (571) 622-4760 Bogota Consultores Regionales Asociados - CRA S.A. http://www.cra.com.co (571) 610-8899 Bogota Consultores Unidos S.A. http://www.consultoresunidos.com.co (571) 612-0700 Bogota Consultoria Colombiana S.A. http://www.concol.com (571) 287-5300 Bogota ESGEN World Wide Corporation http://www.esgem.com.co (571) 602-3434 Bogota Estudios Tecnicos S.A. http://www.e-etsa.com (571) 346-1200 Bogota Gers S.A. http://www.gers.com.co (571) 263-1427 Bogota Hidramsa S.A. [email protected] (574) 266-3991 Medellin HMV Ingenieros http://www.h-mv.com/espanol (574) 370-6666 Medellin IEB Ingenieria Especializada S.A. http://www.ieb.com.co (574) 373-6777 Medellin Ingeominas http://www.ingeominas.gov.co/ (571) 222-1811 Bogota Ingetec S.A. http://www.ingetec.com.co (571) 323-8050 Bogota Integral S.A. http://www.integral.com.co (574) 511-5400 Medellin Salgado Melendez y Asociados. Ingenieros Consultores S.A. [email protected] (571) 218-6511 Bogota Schrader Camargo Ingenieros Asociados S.A. http://www.schradercamargo.com.co (571) 668-3838 Bogota Sedic S.A. http://www.sedic.com.co (574) 251-1400 Medellin Servicios Ambientales y Geograficos S.A. http://www.sag-sa.com (574) 372-3200 Medellin Solingral LTDA http://www.solingral.com (574) 441-5815 Medellin XM Compania de Expertos en Mercados S.A. E.S.P. http://www.xm.com.co (574) 317-2244 Medellin Asociaciones de Geologia y Geofisica Asociacion Pagina WEB/e-mail Telefono Ciudad Sociedad Colombiana de Geologia http://www.sociedadcolombianadegeologia.org (571) 220-0034 Bogota Asociacion Colombiana de Geologos y Geofisicos del Petroleo http://www.acggp.org (571) 255-8777 Bogota Consultores - Especialistas Mercado de Energia Nombre e-mail Telefono / Cel Ciudad Carlos Ivan Saldarriga [email protected] (574) 321-0813 / (315) 460-9916 Medellin Luis Enrique Aguilar [email protected] (574) 332-8293 / (300) 608-5201 Medellin Jose Vicente Guzman [email protected] (574) 511-5400 / (315 568-6929 Medellin Jaime Millan [email protected] (313) 616-6427 Bogota

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