Our Environmental Investment

Over the years, DP&L has invested millions to protect the environment and comply with regulations. Recently, the company invested $175 million in Selective Catalytic Reduction (SCR) equipment to reduce nitrogen oxide (NOx) emissions. Since the equipment was put into service in 2004, NOx emissions have been reduced by approximately 38%.

Currently, DP&L is investing approximately $600 million to install Flue Gas Desulfurization (FGD), commonly called scrubbers, on 1,700 megawatts of coal-fired generation.
The scrubbers will:

• reduce sulfur dioxide emissions (SO2)
• produce cleaner air
• help the company comply with environmental regulations

In addition, the scrubbers, in conjunction with DP&L's existing electrostatic precipitators, will capture significant mercury emissions.

Hutchings Station Existing electrostatic precipitators (ESPs) remove approximately 99% of the fly ash coming from six boilers. Uses low-sulfur coal to insure that SO2 emissions are minimal from this station. Low-NOx burners and over-fire air on Boilers 3,4,5, and 6 were installed during the spring of 2006. NOx emission rates have been reduced by approximately 50% on a year-round basis. Compliance with the Ohio EPA wastewater permit (NPDES) and related sampling insures that the Great Miami River is protected.	Killen Station Electrostatic precipitators (ESPs) followed by the Chiyoda flue gas desulfurization (FGD) system remove approximately 99% of the fly ash coming from the boiler. One new Chiyoda FGD came on line June 1, 2007. Emissions passing through the associated submerged bubbling reactor (SBR) are stripped of approximately 95% of their sulfur dioxide. Commercial grade gypsum is a byproduct. Selective Catalytic Reduction (SCR) controls on this boiler reduce NOx emissions by approximately 75% during the May through September ozone/smog season. Compliance with the Ohio EPA wastewater permit (NPDES) and related sampling insures that the Ohio River is protected.
Stuart Station Existing electrostatic precipitators (ESPs) remove approximately 99% of the fly ash coming from the four boilers. Four new Chiyoda flue gas desulfurization (FGD) units will come online in the first half of 2008. Emissions passing through the associated submerged bubbling reactors (SBR) will be stripped of approximately 95% of their sulfur dioxide. Commercial grade gypsum is a byproduct. Selective Catalytic Reduction (SCR) controls on these boilers reduce NOx emissions by approximately 75% during the May through September ozone/smog season. Compliance with the Ohio EPA wastewater permit (NPDES) and related sampling insures that the Ohio River is protected.	Combustion Turbines The combustion turbines at the Tait and Montpelier Stations use natural gas for fuel. Particulate matter emissions are at trace levels. The natural gas fuel results in trace levels of SO2 emissions. Dry low-NOx burners or water injection are used to reduce NOx emissions. This technology yields the lowest levels of NOx emissions in the DPL system. The combustion turbines use small quantities of well water. There is no withdrawal from or discharge to nearby streams, other than clean storm water flows during rain events.