4101_Guilford_HighPoint_MSWLF_Seaboard_TechMemoE11Response_FID1645997_20220218

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
MICHAEL SCOTT
Director
Gary Babb, P.G.
Babb & Associates, P.A.
Seaboard Group II and City of High Point
5506 Bradford Pear Ct.
Raleigh, NC 27606
NORTH CAROLINA
Environmental Quality
February 18, 2022
Re: Conditional Approval, Technical Memorandum E-I I
Seaboard Group II and the City of High Point, February 3, 2022
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
EPA ID# NCD071574164
Dear Mr. Babb,
The Hazardous Waste Section (HWS) and the Solid Waste Section of the Division of Waste Management
(DWM) have reviewed the referenced Technical Memorandum. We have the following comments:
• (Page 2 and Figures 2 and 4) We would like to get a copy of the laboratory report for the wells
that were sampled and where just total VOCs are labeled on Figures 2 and 4.
(Page 4 and Figure 3) Regarding the wells that are proposed to monitor the effectiveness of the
modified recovery well system, they appear appropriate by the southern intermittent stream (SIS)
basin except well OW-DR1 is screened from 49 to 165 feet and nearby well PW-5D is screened
from 272 to 282 feet. Based on our conversation today, we understand that current recovery well
RW-SIS 1 is screened from 30 to 50 feet below ground, and its base depth is similar to the depth
planned for the new recovery well. Instead of monitoring water levels and water quality in OW-
DRI, please use RW-SIS1. Renumber the well planned to replace RW-SIS1.
• (Figure 4) No well is proposed on the south side of R-1 to monitor water levels near the former
Seaboard facility. Please use existing well W-29 to monitor water levels.
• (Appendix A) Please provide boring logs prepared from installation of the new monitoring wells.
D E Q�� North Carolina Department of Environmental Quality I Division of Waste Management
-
217 West Jones Street 1 1646 Mail Service Center I Raleigh, North Carolina 27699-1646
NORTH CAROLINA
oeParonemmrnrironmemaiouai� � 919.707.8200

Conditional Approval, Technical Memorandum E-11
Former Seaboard and Riverdale Landfill Site
February 18, 2022
Page 2
The DWM approves the scope of work presented in Technical Memorandum E-I I subject to
providing the aforementioned information and using RW-SIS and W-29 for monitoring purposes.
Please contact Eric Aufderhaar at [phone] ([e-mail]) if you have any
questions.
Sincerely,
Eric B. Aufderhaar, P.G., Project Manager
Facilities Management Branch, Hazardous Waste Section
Division of Waste Management, NC DEQ
ec: Craig Coslett, de Maximis, Inc.
Jacqueline Drummond, Solid Waste Section
Bill Hunneke, Supervisor, Facilities Management Branch, Hazardous Waste Section
DE Q�� North Carolina Department of Environmental Quality I Division of Waste Management
_ 217 West Jones Street 1 1646 Mail Service Center I Raleigh, North Carolina 27699-1646
NORTH CAROLINA
oenaMemmEmwnmeMlQusil /`� 919.707.8200