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HomeMy WebLinkAbout0201_AlexanderCDLFOverMSW_CAERResponse_DIN27678_20170427 April 27, 2017 Sent Via Email - jmitchell@alexandercountync.gov Mr. Josh Mitchell Alexander County Solid Waste 621 Liledoun Road Box 12 Taylorsville, NC 28681 Re: Corrective Action Evaluation Report Alexander County Active C&D Over Closed MSW Landfill Alexander County NC Solid Waste Permit Number 0201-MSWLF DIN 27678 Dear Mr. Mitchell: The NC Solid Waste Section has completed a review of the Corrective Action Evaluation Report dated April 3, 2017 (DIN 27584) and submitted on behalf of Alexander County by Municipal Engineering Services Co., P.A. for the Alexander County C&D Over MSW Landfill, NC Solid Waste Permit Number 0201-MSWLF. The NC Solid Waste Section approved the County’s selected remedy for this landfill that includes Monitored Natural Attenuation (MNA), Phytoremediation, Enhanced Bioremediation, Active Methane Extraction System, and Property Acquisition. The Corrective Action Evaluation Report was submitted pursuant to Alexander County’s Corrective Action Plan dated February 6, 2009 and approved on February 19, 2009 (DINs 6790 and 6838), the County’s Corrective Action Plan-Addendum dated December 20 2010 and approved on March 10, 2011 (DINs 13033 and 13200), and the County’s Corrective Action Plan Addendum-Compliance Boundary dated May 30, 2013 and approved on July 24, 2013 (DINs 19362 and 19365). There are currently four areas of concern in regards to the ongoing groundwater corrective action at the landfill. These include the following:  MW-1B Area – active landfill gas extraction has been implemented;  MW-16 Area – property acquisition has occurred and MNA has been implemented;  MW-24 Area – phytoremediation and MNA have been implemented; and  MW-26 Area – substrate injection and MNA have been implemented.  Since the previous Corrective Action Evaluation Report submitted in 2011, it appears that conditions are relatively stable at the landfill and attenuation is continuing to occur. The NC Solid Waste Section approves the Corrective Action Evaluation Report as described, and at this time, the County does not need to implement the contingency plan. The next Corrective Action Evaluation Report is required to be submitted in five years pursuant to the County’s February 20, 2017 Permit (DIN 27338). If you have any questions or concerns regarding this letter, please feel free to contact me at 828.296.4706 or by email at jaclynne.drummond@ncdenr.gov. Thank you for your continued cooperation with this matter. Sincerely, Jaclynne Drummond Compliance Hydrogeologist Solid Waste Section, Division of Waste Management NCDEQ cc sent via email: Jason Watkins, Field Operations Branch Head Deb Aja, Western District Supervisor C.T. Gerstell, Environmental Senior Specialist Ed Mussler, Permitting Branch Head Allen Gaither, Permitting Engineer Perry Sugg, Permitting Hydrogeologist Jonathan Pfohl, MESCO