4101_Guilford_HighPoint_Riverdale_MSWLF_CA_TreatmentSystem_FID1319750_20190418

SEABOARD GROUP HAND THE CITY OF HIGH POINT
April 18, 2019
Mr. Joe Ghiold, Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Re: Treatment System — PLCAHMI Update
Former Seaboard Chemical and Riverdale Drive Landfill Site
Jamestown, Guilford County, North Carolina
Dear Mr. Ghiold:
As reported in recent quarterly progress reports, electronic issues within equipment and control logic for
the treatment system have resulted in repeated communication and operational issues over the past two
quarters of operations. Most, if not all of these problems stem from electronics and equipment that is
obsolete and incompatible with current operations. To rectify the issues, the Seaboard Group II and the
City of High Point (Parties) have elected to replace the PLC/HMI control system and optimize
groundwater extraction and treatment system operations at the referenced Site. This modification is
intended to resolve system operational issues and allow for more continuous operations.
The work being conducted at this time includes:
Installation of new hardware (IE valves, control electronics) to replace old equipment that is no
longer available and/or incompatible with new software.
Wiring of new equipment.
Installation of new programmable control logic.
During the PLC/I1MI replacement, the Parties are planning to take the opportunity to completely remove
the PhotoCat equipment and controllers from the treatment enclosure. This will include:
• Removal and recycling of UV lamps.
• Removal and recycling of PhotoCat equipment and controllers.
• Removal of nonessential pumps, valves, and piping.
• Removal, recycling, and/or disposal of electrical wiring, conduits, and control boxes associated
with the PhotoCat.
The Parties have already received approval from recycling outlets for the UV bulbs and lamp drivers.

Treatment System — PLC/HMI Update
Former Seaboard Chemical and Riverdale Drive Landfill Site
April 18, 2019
Please contact me at [phone], if there are any questions or comments regarding the proposed
work. We anticipate that the work will be performed and completed during the Yd Quarter 2019.
Respectfully,
Seaboard Group II and City of High Point
R. Craig Loslett
Administrator
CC: Dave Nutt, Esq. - Seaboard Trustee (electronic mail only)
Steve Anastos - Seaboard Trustee (electronic mail only)
Ed Gunderson - Seaboard Group Technical Committee (electronic mail only)
Terry Houk - City of High Point Trustee (electronic mail only)
Amos Dawson, Seaboard Group II Counsel (electronic mail only)
Jackie Drummond - NCDEQ Division of Solid Waste (electronic mail only)
FR-E 3256.05/PhotoCat Removal Notice Final