7401_PittCounty_SouthernUnit_MSWLF_MonitoringRequest_FID1417773_20200701

Groundwater Management Associates, Inc.
GMA C
July 1, 2020
Ms. Jaclynne Drummond
Hydrogeologist
NCDEQ, DWM, Solid Waste Section
2090 US Highway 70
Swannanoa, North Carolina 28778
4300 Sapphire Court, Suite 100
Greenville, North Carolina 27834
Telephone: [phone]
Facsimile: [phone]
www.qma-nc.com
Re: Request for Reduced Sampling Frequency of Appendix II Constituents at the Southern Unit
of the Pitt County Solid Waste Municipal Landfill (Permit #74-01)
Dear Ms. Drummond,
Pitt County (the County) is actively working to address 1,4-dioxane and benzene groundwater
contamination at the Southern Unit of the closed and unlined Pitt County Solid Waste Municipal
Landfill (Facility Permit #74-01, Figure 1) via substantial cap repairs and stormwater system
upgrades. While the County finalizes the plans for these repairs, they continue to monitor
groundwater at the Southern Unit for the parameters identified in Appendix I of 40 CFR Part
258 plus 1,4-dioxane on a semi-annual basis and for the parameters listed in 40 CFR Part 258
Appendix II on an annual basis.
Over the last 20 years, very few of the constituents unique to Appendix II have been detected
in groundwater down -gradient of the Southern Unit, and none of the constituents unique to
Appendix II have been detected at or above the approved groundwater protection standards
since 2014.
Based on the lack of detections, Groundwater Management Associates, Inc. (GMA), on behalf of
Pitt County, requests that the NC SWS allow a reduction in sampling frequency for Appendix II
constituents at the Southern landfill unit. Specifically, we request that the NC Solid Waste
Section allow the County to sample for Appendix II constituents on a biennial basis with the
next scheduled Appendix II sampling event occurring during July 2022. This request is made in
accordance with 15A NCAC 13B .1634. Pitt County only requests to reduce the sampling
frequency for Appendix II constituents and will continue to sample the Southern Unit for
Appendix I parameters (which includes benzene) and for 1,4-dioxane on a semi-annual basis.

Ms. Jaclynne Drummond
NC Solid Waste Section
July 1, 2020
Page 2 of 2
Please contact me if you have any questions or concerns, and thank you for your consideration
in this matter.
Sincerely,
Groundwater Management Associates, Inc.
I
Emma H. Shipley, P.G.
Project Hydrogeologist
cc: Richard K. Spruill, Ph.D., PG (GMA)
Tim Corley, P.E. (Pitt County)
John Demary (Pitt County)
Z:\GMA\251XX-Pitt County\25101 - Landfill\DEQ SWS Correspondence\Pitt Co Landfill App II Request 20200701.docx