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Plant Branch Electricity While Minimizing the Company’S Environmental Impact

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Plant Branch Electricity While Minimizing the Company’S Environmental Impact Environment – A Balanced Approach At Georgia Power, we strive to provide our customers with reliable and affordable Plant Branch electricity while minimizing the company’s environmental impact. To meet the needs of 2.5 million customers, Georgia Power has created a diverse energy portfolio Ash pond closure and dewatering that delivers sustainable power. Georgia Power is permanently closing its 29 ash ponds at At Georgia Power, compliance with federal and state environmental requirements 11 coal-fired power plants across the state and has committed is only the beginning of our environmental commitment. In addition to compliance, we emphasize conservation and recycling, and help our customers make efficient that all ash ponds will stop receiving coal ash within three years. use of energy. We challenge ourselves every day to preserve the environment and strengthen the communities in which we live, work and serve. Additionally, the company is completely removing the ash from 19 ponds located adjacent to lakes or rivers where advanced Cornerstones of Our Commitment engineering methods designed to enhance the protection of Three principles serve as the cornerstones of our environmental commitment: groundwater around the closed pond may not be feasible. The Solutions ash from these ponds will either be relocated to a permitted Our environmental record is a top priority and we are taking steps in the communities we serve to improve the environment, including investing more than $5 billion landfill, consolidated with other closing ash ponds or recycled for in environmental controls at our power plants in Georgia. beneficial use. More than 60 percent of the coal ash Georgia Power Balance We strive to maintain a balance that furthers environmental stewardship while produces today is recycled for various uses such as Portland providing for growing energy needs and the economy. cement, concrete and cinder blocks. The company’s remaining Stewardship 10 ash ponds will be closed in place using advanced engineering Providing environmental leadership is fundamental to Georgia Power’s vision and our commitment to create sustainable change. methods and technologies that are designed to enhance For more information visit www.georgiapower.com/environment protection of groundwater. ©2019 Georgia Power Company. All Rights Reserved. ASH POND DEWATERING Typical Wastewater Treatment System Typical Wastewater Treatment System 5. Solids Removal This diagram depicts the typical waste- Solids will be removed and dis- posed of at a permitted facility. water treatment process that’s being implemented at Georgia Power facilities. 4. Clarification These systems are being utilized for Particles are removed through clarification. This is a mechanical 6. Filtration enhanced treatment of wastewater during system that slows the water down Physical filtration may be performed the dewatering process. and enables settling of particles in with sand and cartridge filters. These the wastewater. filters may be installed sequentially to provide removal of any remaining 3. Flocculent Addition particles. Wastewater treatment chemicals are added, helping particles group Ash Pond Closure together to improve treatment and Dewatering performance. As Georgia Power closes its ash ponds, water in the ponds must be 2. pH Adjustment pH adjustment is performed to removed so the ash pond can either neutralize the incoming waste- be excavated or closed using advanced water and facilitate improved 7. Monitoring engineering methods and technolo- treatment. Continuous effluent monitoring gies. In some cases, the water may is performed to ensure that the be reused in plant processes, while in discharge is protective of public EXAMPLE 1. Equalization other cases, it will be treated before Flow equalization is performed health and the environment. to control water volume being being discharged. This treatment and sent to the treatment system. removal activity is known as “dewa- This equalized flow enables tering.” Throughout the dewatering consistent and efficient system 8. Quality Control operation. Any water not meeting the re- process, the company will comply quired standards is recycled back with its National Pollutant Discharge to the ash pond for additional Elimination System (NPDES) permits, treatment. as well as the state Coal Combustion Residuals (CCR) Rule. Before Georgia Power dewaters any ash pond, the company provides advance notice to the Georgia Environmental Protection Division (EPD). Ash Pond Dewatering – Planning & Processes Additionally, the company prepares and submits an Georgia Power will sample and test plans and all sampling data will be “ash pond dewatering plan” to EPD for its approval. The dewatering plan submitted to the during the ash pond dewatering process. the treated water for a broad range of reported to the Georgia EPD. Data tables That plan identifies the enhanced water treatment Georgia EPD describes the additional The plan provides an overview of the substances, including metals, in accordance summarizing results of individual rounds system, controls and monitoring that will be used safeguards and enhanced wastewater wastewater treatment system; a narrative with its EPD-approved dewatering plan. of testing at Plant Branch will also be during the process to ensure that the water discharged treatment system (illustrated above) that description of the key processes; details of Independent third-party contractors will posted on Georgia Power’s website at is protective of water quality standards. Georgia Power will put in place to ensure the the major process control measurements conduct the sampling work. All samples www.georgiapower.com/environment facility’s NPDES permit effluent limitations being performed; and a plan for performing will be analyzed by accredited indepen- with detailed footnotes that clearly continue to be met and that the receiving additional effluent monitoring. dent laboratories for 23 parameters explain the data. waterbody continues to be protected (see sample table above). Dewatering .
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