8401_CityofAlbemarleMSWLF_ASDMonSchedAppr_DIN28563_20171019

October 19, 2017 Sent Via Email – [e-mail] Ms. Nina Underwood City of Albemarle Department of Solid Waste
40592B Stony Gap Road
Albemarle, NC 28001 Re: Appendix I Inorganic Constituent Exceedances City of Albemarle Landfill
Solid Waste Permit Number 8401
DIN 28563

Dear Ms. Underwood:

The Solid Waste Section (Section) has completed a review of the proposed temporary
monitoring schedule (DIN 28538) submitted on behalf of the City of Albemarle by Shield
Engineering, Inc. (Shield) for the City of Albemarle Subtitle D MSW Landfill, Solid Waste Permit
Number 8401. The schedule was submitted in response to correspondence from the Section
dated August 3, 2017 (DIN 26556) requiring the City of Albemarle to address potential turbidity
of groundwater samples prior to calculating statistical background values.

Shield submitted a temporary monitoring schedule proposal to collect ten non-turbid
groundwater samples over a two-year period from background well MW-1. Data from these
samples would be used to calculate statistical background concentrations for inorganic
constituents of concern. Shield proposed to collect groundwater samples from MW-1 using
low-flow sampling methods starting in October 2017 and then during each quarterly landfill gas
and semiannual groundwater monitoring event of 2018. In addition, groundwater samples are
proposed to be collected during the first two quarterly landfill gas and semiannual groundwater
monitoring events of 2019. Laboratory and field results for the ten sampling events will be
included in each subsequent semiannual groundwater monitoring report. The groundwater
monitoring report after the final sampling event in July 2019 will include the statistical analysis
based on the ten non-turbid groundwater samples. The Section approves the temporary
monitoring schedule and the City of Albemarle may proceed as proposed.

If you have any questions or concerns regarding this letter, please feel free to contact me by
email at [e-mail] or by phone at 919.707.8288. Thank you for your cooperation
with this matter.

Sincerely,

Ervin Lane Compliance Hydrogeologist Solid Waste Section, Division of Waste Management
NCDEQ

Cc: Ellen Lorscheider, Solid Waste Section Chief
Jason Watkins, Field Operations Branch Head
Deb Aja, Western District Supervisor
Teresa Bradford, Environmental Senior Specialist
Ed Mussler, P.E., Permitting Branch Head
Perry Sugg, Permitting Hydrogeologist
J.David Wallace, P.E., Shield Engineering, Inc.