The Doe Run Company Announces Emissions Control Measures For Herculaneum

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Nine of 10 air monitoring sites met National Ambient Air Quality Standard.

The Doe Run Company today announced a number of steps the company’s Herculaneum, Mo., facility will take to help meet the National Ambient Air Quality Standard (NAAQS) for lead. The proposed control measures were shared yesterday with the Environmental Protection Agency (EPA) and Missouri Department of Natural Resources (MDNR) to prepare for a revised State Implementation Plan (SIP). A SIP identifies measures and steps to be taken in order to reach expected objectives – in this case, to achieve the NAAQS.

Doe Run’s Herculaneum facility continues to comply with its SIP, and for years has been able to attain the NAAQS at all but one air monitoring station. Historically, the Broad Street monitor, located less then 200 yards east of the facility, has been either slightly under or slightly over the standard. For the first quarter of 2006, the Broad Street monitor measured 1.8 micrograms of lead per cubic meter of air (averaged over a three-month period). The remaining nine air monitoring stations (High School, Bluff, Sherman, City Hall, South Main, South Cross, North Cross, Mott and Circle) were within the EPA-specified air quality standard of 1.5 micrograms of lead.

“Based on emissions data, we have identified several control measures that we believe will enable us to consistently meet the NAAQS,” said Gary Hughes, general manager at the Herculaneum Smelter. “In many instances, work is already underway. We look forward to MDNR’s review of our proposed SIP control strategies as we work to reach our shared objectives.”

Recently, Doe Run has taken several steps to further reduce emissions. In March alone, the company spent more than $1 million on maintenance, repairs and upgrades. One of the upgrades includes installation of a new type of bag in the baghouse and new bag-cleaning technology that reduces wear and tear on baghouse bags and, ultimately improves the dust capturing efficiency. (Baghouses are filtration systems that clean air by capturing dust particles.) This technology upgrade is one of several SIP control strategies designed to improve air quality. Doe Run expects this project to be complete by late May.

Creating a “buffer zone” between the smelter and community is another proposed project. Modeling demonstrates levels of emissions decline significantly with distance. The five new monitors that began operating late last year confirmed the modeling predictions.

About the Doe Run Company

Based in St. Louis, The Doe Run Company is a privately held natural resources company dedicated to environmentally responsible mineral production, metals fabrication, recycling and reclamation. The company and its subsidiaries deliver products and services needed to provide power, protection and convenience through premium products and associated metals including lead, zinc, copper, gold and silver. As the operator of one of the world’s only multi-metal facilities and the Americas’ largest integrated lead producer, Doe Run employs more than 5,000 people, with U.S. operations in Missouri, Washington and Arizona, and Peruvian operations in Cobriza and La Oroya. Committed to sustainable development, The Doe Run Company has helped bring electrical power, business training, educational opportunities and improved telecommunications to rural communities in Peru and the U.S. For more information, visit

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release that are not historical facts are “forward-looking statements.” These forward-looking statements may be significantly impacted, either positively or negatively, by various factors, including without limitation, the Company’s ability to satisfy its debt and environmental obligations, regulatory compliance with local state and federal governmental agencies, financing sources, potential and actual litigation, weather, permits, raw materials cost, competition and business conditions in the mining and recyclable industries. As a result, the forward-looking statements are subject to numerous risks and uncertainties that could cause actual results to differ materially from those expressed in or implied by the statements herein. For a discussion of such risks and uncertainties, see the risk factors set forth in the Company’s Annual Report on Form 10-K for the most recently ended fiscal year.


Christi Dixon

(314) 469-3500


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