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3612_AllenEPACCRWellRequest_DIN25837_20160328.pdf526 South Church St. Charlotte, NC 28202 P.O. Box 1006 Mail Code EC13K Charlotte, NC 28201-1006 704-382-4761 704-382-6240 fax www.duke-energy.com Page 1 of 2 March 28, 2016 North Carolina Department of Environmental Quality Division of Waste Management Solid Waste Section 1646 Mail Service Center Raleigh, North Carolina 27699-1649 Attn: Ms. Elizabeth Werner Re: Duke Energy Carolinas, LLC – Allen Steam Station Retired Ash Basin (RAB) Ash Landfill Permit No. 3612-INDUS-2008 Gaston County Drilling Request Dear Ms. Werner, Duke Energy Carolinas, LLC (DEC), Allen Steam Station requests concurrence from North Carolina Department of Environmental Quality (NCDEQ) Division of Waste Management (Division) for drilling in vicinity to the Allen Steam Station Retired Ash Basin (RAB) Ash Landfill (Permit No. 3612-INDUS-2008). This drilling request is in effort to satisfy USEPA Hazardous and Solid Waste Management System; Disposal of Coal Combustion Residuals From Electric Utilities (USEPA CCR) 40 CFR Part 257.91. Currently, fourteen (14) groundwater monitoring wells are intended to be installed in the approximate locations shown on the attached drawing titled "Proposed CCR Monitoring Well Locations". Upon completion of monitoring well installation, Duke Energy will submit a well installation completion package to the Division noting actual well locations and depths including drilling logs. In addition, approximately six (6) existing wells are likely to be utilized as part of this landfill CCR monitoring network. The existing wells which are planned to be incorporated into the network are also indicated with text boxes on the attached figure. Installation of additional background and downgradient monitoring wells is also planned around the station’s ash basin system to be included in the site-wide, multi- unit groundwater monitoring network for the CCR Rule. This request is being submitted electronically. Please let me know if you would like to receive paper copies. Respectfully submitted, Sean DeNeale, Engineer III Environmental Services Attachments: Proposed CCR Monitoring Well Location Drawing cc (via e-mail): Scott Harris, Duke Energy Kyle Baucom, Duke Energy Randy Gantt, Duke Energy Ed Sullivan, Duke Energy Ed Mussler, NCDEQ