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HomeMy WebLinkAbout9202_EastWake_MSWLF_MetalsASDResponse_DIN28772_20180223 February 23, 2018 Sent Via Email – john.roberson@wakegov.com Mr. John Roberson Wake County Solid Waste Director 336 Fayetteville Street Raleigh, NC 27602 Re: Alternate Source Demonstration Redevelopment and Sampling Work Plan East Wake Closed Unlined MSW Landfill – Rigsbee Property Wake County Solid Waste Permit Number 9202-MSWLF-1981 DIN 28772 Dear Mr. Roberson, The Solid Waste Section (Section) has completed a review of the Alternate Source Demonstration Redevelopment and Sampling Work Plan dated December 20, 2017 (DIN 28771) and submitted on behalf of Wake County by CDM Smith for the East Wake Closed Unlined MSW Landfill-Rigsbee Property, Solid Waste Permit Number 9202-MSWLF-1981. The Alternate Source Demonstration Redevelopment and Sampling Work Plan was submitted in response to elevated reported metal detections in monitoring wells at the site, and to also determine if the metal detections are naturally occurring. Wake County is requesting approval of a monitoring schedule until their Fiscal Year 2020 to redevelop monitoring wells, sample the background monitoring wells to establish background concentrations, and to collect filtered samples for dissolved metals analyses. Wake County is proposing the following: quarterly monitoring well redevelopment and sampling events for the background monitoring well MW-01; monitoring well redevelopment during the Fall 2017 and Spring 2018 semiannual sampling events; and collection of filtered samples for dissolved metals analyses in monitoring wells where the turbidity is greater than 10 NTUs. Based upon the information provided within the Alternate Source Demonstration Redevelopment and Sampling Work Plan, the Section approves the time extension and additional activities as described for the East Wake Closed Unlined MSW Landfill-Rigsbee Property. If you have any questions or concerns regarding this letter, please feel free to contact me by email at jaclynne.drummond@ncdenr.gov or by phone at 828.296.4706. Thank you for your continued cooperation with this matter. Sincerely, Jaclynne Drummond Hydrogeologist Solid Waste Section, Division of Waste Management NCDEQ cc sent via email: Ed Mussler, Section Chief Adam Ulishney, Environmental Compliance Branch Head Jason Watkins, Field Operations Branch Head Drew Hammonds, Eastern District Supervisor Elizabeth Patterson, Environmental Senior Specialist Ethan Caldwell, Permitting Engineer Elliot Cornell, Wake County Mat Colone, CDM Smith