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Home My WebLink About7305_DukeMayo_ LeachateHaulingPlan_2018-04-02Mayo Electric Steam Plant Monofill Permit No. 7305-INDUS Leachate Transportation Plan 10660 Boston Road, Roxboro North Carolina Person County Created by: CCP Operations & Maintenance Carolina East April 2, 2018 – Revision 0 Duke Energy Mayo Monofill Leachate Transportation Plan - Rev 0 Page 2 of 5 1.0 Mayo Monofill Leachate Hauling Plan The scope of work in this leachate transportation plan (Plan) outlines information for the support of transportation activities from the Mayo Electric Steam Plant Monofill (Permit No 7305-INDUS) (monofill) leachate tanks to the FGD Pond network. Current operational conditions of the leachate collection system (LCS) force main have resulted in a temporary inability to convey leachate from the monofill storage tanks to the FGD pond via force main piping. Leachate will temporarily be conveyed from the monofill storage tanks to the FGD pond via water tight trucks. While the current force main outage is anticipated to last 6 to 8 weeks, this Plan is intended to be entered into the operating record as a permanent contingency plan for conveying leachate, should it be needed in the future. Leachate hauling via truck will typically be conducted during daylight hours. The haul route is similar to the CCR disposal haul route (Figure 1) with the exception of proceeding on an existing road parallel to the rail line, onsite, to the FGD pond area. No deviations from the haul route shown below are anticipated. Should deviations occur, the alternate route will be internally reviewed to ensure the alternate route is safe for transport. The Division will be contacted if any portion of the offsite route requires an alteration. A speed limit of 15 mph will be maintained by the leachate haul trucks. At the railroad and Hwy 501crossings, drivers are required to stop and verify it is safe to proceed. Figure 1 – Mayo Leachate Haul Road Plan MAYO MONOFILL TANK AREA FGD Pond RAILROAD CROSSING HWY 501 Duke Energy Mayo Monofill Leachate Transportation Plan - Rev 0 Page 3 of 5 2.0 Leachate Loading and Unloading Operations Loading at the monofill storage tanks A water truck loading system is already in place at the monofill. This is a contained area that drains to a collection sump. Should there be any spill of leachate during loading, the sump pumps the leachate back to the LCS. Leachate will be loaded into a water water tight truck intended to transport liquid. The operator will inspect the truck during loading operations for leaks, prior to leaving the loadout pad, including verification that the truck tank is not overfilled. Unloading at the FGD pond area Unloading will occur at the FGD pond area which consists of a decommissioned bio- reactor building, FGD flush pond, and FGD settling pond. Leachate will be unloaded into the drainage system in the decommissioned bioreactor building which gravity drains to the FGD pond system (Figure 2). Figure 2 – Mayo Unloading at The FGD Pond Area The water truck will back into the decommissioned bio-reactor building so that it is completely in containment. A hose will route the leachate to the internal drainage ditch (Figure 3) allowing the leachate to safely flow into the drainage system. Any potential spills will be captured in the building drainage system that flows to the FGD pond system. BIO-REACTOR BUILDING FGD FLUSH POND FGD SETTLING POND Duke Energy Mayo Monofill Leachate Transportation Plan - Rev 0 Page 4 of 5 Figure 3 – Decommissioned Bio-Reactor Building Drain 3.0 Safety Work will occur with strict conformance to Duke Energy safe work practices including but not limited to: • Before all work is started, workers will complete the CCP Operations and Maintenance (O&M) work start checklist and pre-job briefs will be conducted in the morning and mid-day, after lunch. Workers will review this work plan every morning. • A spotter will be used, as needed, to ensure trucks traverse safely around obstacles. • All workers will utilize standard PPE. • At the railroad crossing and Hwy 501, a stop will occur and the driver will look for oncoming train or vehicular traffic before proceeding. 4.0 Risk Mitigation Vehicle Accident Causing Injury and Spill: Mitigation: A spotter will be used when backing up near FGD ponds, Bioreactor building, and congested areas; the driver will follow posted speed limits. All personnel will be trained on this work plan. Spill to waters of the state: Mitigation: The driver will inspect equipment prior to use; ensure no path besides approved route is used without approval from O&M representative; if a leak is observed during transit, a spill kit will be available to contain the leak. All leachate loading and unloading operations will be conducted in a contained area as described above. Struck-by heavy equipment: Duke Energy Mayo Monofill Leachate Transportation Plan - Rev 0 Page 5 of 5 Mitigation: Workers will utilize radios for spotters. Ensure personnel have been trained on this work plan. 5.0 Environmental Controls • Routine inspections of the haul route will occur during hours of operation to identify spills or areas of potential spills. • All leachate loading and unloading operations will be conducted in a contained area as described above. • The leachate hauling trucks will be equipped with a spill kit in case of leachate or other fluid release to the environment • If a spill occurs, notifications will be made according to the site emergency response plan which is summarized in the call tree (Figure 4). If a spill occurs at Hwy 501 the Person County Emergency Management will be notified in addition to the Division. Figure 4 – Mayo Leachate Hauling Emergency Response Call Tree Charah Site Superintendent Duke Energy Site Environmental Coordinator Duke Energy Waste Subject Matter Expert NCDEQ DWM Duke Energy Water Subject Mater Expert NCDEQ DWR Offsite Spill Person County Emergency Management Duke Energy Site System Owner Duke Energy Site Safety Officer