Doe Run Sustainability Report: Environmental Capital Spending Jumps 45%
The company’s spending jumped from from $22.5 million in 2010 to $32.2 million in 2011, according to the 2011 sustainability report, released in February. The big increases in spending occurred at the company’s Southeast Missouri Mining and Milling Division and Buick Resource Recycling Division, the report says.
Doe Run’s spending on remediation increased around 40 percent from almost $34 million in 2010 to $47.7 million in 2011, the report shows.
One remediation project is at a former lead mine in Missouri, under a March 2011 order from the EPA. Under the agreement, Doe Run and the Missouri Department of Natural Resources’ Division of State Parks agreed to remove lead contamination at St. Joe State Park, including off-road vehicle riding areas and a former lead milling location now preserved as a museum, as well as an adjacent section of the Shaw Branch floodplain in St. Francois County, Mo. At the time, the EPA estimated that the removal action would cost about $7 million and take about 18 months to complete.
The company’s direct energy consumption dropped 0.5 percent year-on-year, from 2,885,377 GJ in 2010 to 2,869,809 in 2011. Doe Run’s use of explosives increased year-on-year as a result of development at the company’s Southeast Missouri Mining and Milling Division. Its use of natural gas decreased due to the mild winter in 2011, the report says.
Doe Run’s indirect energy consumption increased 0.7 percent year-on-year, from 1,493,032 GJ in 2010 to 1,504,019 GJ in 2011.
Doe Run’s “significant air emissions” metric, for amount of released materials including aluminum, carbon monoxide and sulfur dioxide, increased 16 percent year-on-year, from 37,234 metric tons in 2010 to 43,447 mt in 2011. The majority of these emissions are made up of carbon monoxide, which accounted for 25,659 mt in 2011, and sulfur dioxide, which accounted for 17,434 mt.
In 2010, the EPA set stronger air quality standards for sulfur dioxide to be implemented in 2012. In preparation, Doe Run’s Buick Resource Recycling Division began installing technology in 2011 that decreases SO2 emissions.
Water is a key to processes at each of Doe Run’s 10 facilities — from jump-starting recycling at the Buick Resource Recycling Division to reducing dust at the Herculaneum site, the report says. Teams throughout the company installed new equipment and tested water treatment practices in 2011 as they eyed future improvement, the report says.
The Southeast Missouri Mining and Milling Division manages about 30 million gallons of water that naturally enter the mines daily. In 2011, SEMO began the installation of water collection and pumping stations at the Sweetwater and Casteel mines. This roughly $1.7 million investment is aimed at improving Doe Run’s water management infrastructure to meet more strict water discharge regulations. The installations are designed to improve the quality of water being managed underground, and may reduce the need for treatment above ground.
SEMO also has been actively conducting research that will inform Doe Run’s future water treatment practices. In 2011, SEMO completed a pilot water treatment test at its Casteel Mine. Test results revealed that a method commonly used to treat municipal waste water could be applied to mine water to reduce the mineral content, consistent with water regulations. As a next step, Doe Run will expand its research to gather international water treatment best practices beyond the mining industry, the report says.
The company’s scopes 1 and 2 greenhouse gas metric increased 3.7 percent from 2010 to 2011, according to the report. In 2010, the company emitted 594,200 metric tons of CO2e compared to 616,300 metric tons in 2011. In 2009, the company emitted 426,000 mt CO2e.
Doe Run’s scope 3 emissions included 30 percent year-on-year, from 11,000 mt CO2e in 2010 to 14,300 mt CO2e in 2011. In 2009 the company was responsible for 7,000 mt CO2e, meaning this metric has more than doubled in two years.
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