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Completed Projecds

Environmental Upgrade Program

Metallurgical Complex of La Oroya

The stations monitor air quality in the sorroundings of the Metallurgical Complex. This proyectrequired an investment of US 0.63 million and is operational since 1999.

Monitoring stations

This project eliminated the discharge of copper and lead slag to the Mantaro river. It required an

investment of US$ 9.71 million. Its operational since 2001.

Cu and Pb slag handling

This project allows the safe storage and handling of arsenic trioxide. To this end, Doe Run Perú invested

US$ 2,42 million. The project is operative since February 2001.

Arsenic Trioxide deposit

This project eliminated discharges to the Yauli river. The investment required was US$ 3.11 million. It is

operational since December 2003.

Water treatment plant – Copper Refinery

The objetive of this project is the safe storage and handling of ferrites. An investment of US$ 2,12

million was required. It is operational since November 2002.

Ferrites Deposit

The objetive of the program is to secure a safe slag deposit. An investment of US$ 1.09 million was

required and is operational since May 2004.

Remediated slag deposit

Doe Run Peru construted three plants (Huaymanta, Chúlec, and Fundición) with a total investment of

US$ 7.26 million.

Tratamiento de aguas servidas

With nearly US$ 39 million investment, this plant secures that all industrial effluent discharges comply

with international standards for water used in agriculture.

Industrial WasteWater Plant

This project required conditioning works in several units of the Central Cottrel and the construction and

installation of new dust collectors.

Dust emission reduction through the stack

The efforts to control fugitive emissions included sinter plant ventilation, enclosures, anodic residues

ventilation among others.

Fugitive emissions reduction

In December 2006 Doe Run Peru completed the upgrade and expansion of the Zinc Circuit Sulfuric Acid

Plant.

Zinc Sulfuric Acid Plant Upgrade

Complementary Projects include pavings, truck washing systems andmany others.

Complementary Projects

Forestation project

Doe Run Peru has partnered with the surrounding communities in a widespread tree planting projects

resulting in improved environmental conditions..

Lead Circuit Sulfuric Acid Plant

The new Lead Circuit Sulfuric Acid Plant required an overall investment of US $ 50 million and will make

possible a 50% reduction in SO2 emissions. The new plant was inaugurated September 30, 2008.

September 30 2008, Doe Run peru also inaugurated a new acid storage and handling terminal with a

30,800 MT capacity.

Acid Storage Terminal

Trabajos de reforestación

When Doe Run Peru completes its environmental upgrade program in October 2009, total investment is

stemated to reach US$ 400 million.

In this manner, Doe Run Peru will meet its obligations with the Peruvian State and the people of La

Oroya.