N° 2017/76349.2

Certification certifies that the management system implemented by: AFNOR Certification certifie que le systéme de management mis en place par :

EMPRESA METALÚRGICA VINTO

for the following activities: pour les activités suivantes :

SMELTING PROCESS OF TIN CONCENTRATES USING TOP SUBMERGED LANCE TECHNOLOGY AND TIN REFINING PROCESS, FOR THE PRODUCTION AND COMMERCIALIZATION OF METALLIC

TIN, "ENAF" BRAND, GRADE Al.

PROCESO DE FUNDICION DE CONCENTRADOS DE ESTAÑO APLICANDO TECNOLOGIA DE LANZA SUMERGIDA Y PROCESO DE REFINACION DE ESTAÑO, PARA LA PRODUCCION Y

COMERCIAL1ZACION DE ESTAÑO METALICO EN LINGOTES MARCA "ENAF", CON CALIDAD GRADO Al.

has been assessed and found to meet the requirements of: a été évalué et jugé conforme aux exigences requises par .

ISO 9001 : 2015 and is developed on the following Iocations:

et est déployé sur les sites suivants

Vinto, Km 7,5, carretera a Potosí - Oruro, BOLIVIA

This certificate is valid from (year/month/day) Ce certificat est valable á compter du (année/mois/jour)

2018-11-09 until jusqu'au

2020-08-09

cofre«

CERTIFICATION DE SYSTEMES OE NdlitAGMERT

4."):214-4101,1 tí' .1111.11•1

iFA Mit 1/aw= d

Ce document est signé élertroniguernen1 II constitue un original étertronique á valeur probatode

This document rs electrorncally sIgned. 11 stands for an e/ectsnnic onginal with pruhationaty value

Franck LEBEUGLE Manaqinq Director of AFNOR Certification

Directeur General d'AFNOR Certification

The electronic certificate only, available at www afnor ord, attests in real-time that the company is cerlified. Seul le certificat électronique. consultable sur orno,' orQ reit foi en temps réel de la certilication de Sean this QR code to rorganisme. COFRAC accreditation rr .4-0001, Management Systems Certification, Scope available on www cofrec.fr Accreditation COFRAC n°4-0001. Certification de Systemes de management.

Portee disponible sur www.cofrac. f r AFAClis a registered trademark. AFAO est une merque deposée. CERTI F 0956.7 - EN 11/2014 check the validity of the certificate

IrISA n nr, An 17 nn nn

Sistema de Gestión de la Calidad

Certificado N° 2392/69

EL INSTITUTO BOLIVIANO DE NORMALIZACIÓN Y CALIDAD CERTIFICA QUE EL SISTEMA DE GESTIÓN DE LA CALIDAD DE:

EMPRESA METALÚRGICA VINTO

EMV EMPRESA METALÚRGICA VINTO

Vinto km 7.5 carretera a Potosí

Oruro - Bolivia

Cumple con los requisitos de la Norma:

N B/ISO 9001:2015 150 9001:2015

Sistemas de Gestión de la Calidad - Requisitos

Cuyo alcance es:

"Proceso de fundición de concentrados de estaño aplicando tecnología de lanza sumergida y proceso de refinación de estaño, para la producción y comercialización de estaño metálico en lingotes marca "ENAF", con

calidad grado Al."

RE

G-P

RE

-TC

S-10

-01A

.00

Vigencia del Certificado: 2018-11-07 al 2020-08-09

José Durán Guillén Daniel Sánchez Soliz Director Ejecutivo Presidente

AFNOR CERTIFICATION

T1-1E INTERNATIONAL CERTIFICATION NETWORK

CERTIFICATE AFNOR Certification has issued an IQNet recognized certificate that the organization

EMPRESA METALÚRGICA VINTO

Vinto, Km 7,5, carretera a Potosí - Oruro, BOLIVIA BO

has implemented and maintains a Management System for the following scope:

SMELTING PROCESS OF TIN CONCENTRATES USING TOP SUBMERGED LANCE TECHNOLOGY AND TIN REFINING PROCESS, FOR THE PRODUCTION AND COMMERCIALIZATION OF METALLIC

TIN, "ENAF" BRAND, GRADE Al.

which fulfils the requirements of the following standard:

ISO 9001 : 2015 Issued on: 2018-11-09

Expires on: 2020 -08 -09

This attestation is directly linked to the IQNet Partner's original certificate and shall not be used as a standalone document

Registration Number : FR- 2017 / 76349.2

71 , VICA,ON I.

Alex Stoichitoiu

Franck Lebeugle President of IQNet

Managing Director of AFNOR Certification

IQNet Partners*: AENOR Spain AFNOR Certification France APCER Portugal CCC Cyprus CISQ Italy

CQC China CQM China CQS Czech Republic Cro Cert Croatia DQS Holding GmbH Germany FCAV Brazil FONDONORMA Venezuela ICONTEC Colombia Inspecta Sertifiointi Oy Finland INTECO Costa Rica

IRAM Argentina JQA Japan KFQ Korea MIRTEC Greece MSZT Hungary Nemko AS Norway NSAI Ireland NYCE-SIGE México PCBC Poland Quality Austria Austria RR Russia SII Israel SIQ Slovenia

SIRIM QAS International Malaysia SQS Switzerland SRAC Romania TEST St Petersburg Russia TSE Turkey YUQS Serbia IQNet is represented in the USA by: AFNOR Certification, CISQ, DQS Holding GmbH and NSAI Inc.

* The list of IQNet partners is valid at the time of issue of this certificate. Updated information is available under www.kinet-certification.com CERTI F 0525.8 07/2018